move onTriggerTime back to pattern.mjs

passed. also rename xScheduler to xOutput, to be consistent with
webaudioOutput and friends

.forgejo/workflows/deploy-hot.yml

@@ -13,10 +13,11 @@ jobs:
   build:
     if: ${{ github.event.label.name == 'serve-hot' }}
     runs-on: docker
+    container: node:22-bookworm
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}      
+          ref: ${{ github.event.pull_request.head.sha }}
       - uses: pnpm/action-setup@v4
         with:
           version: 9.12.2
@@ -41,4 +42,4 @@ jobs:
           ssh-keyscan matrix.toplap.org > ~/.ssh/known_hosts
           rsync -atv --delete --delete-after --progress \
             ./website/dist/ \
-            strudel@matrix.toplap.org:/home/strudel/deploy/pr-${{ github.event.pull_request.number }}.hot.strudel.cc
+            strudel@matrix.toplap.org:/home/strudel/deploy/pr-${{ github.event.pull_request.number }}.hot.strudel.cc

.forgejo/workflows/deploy-warm-beta.yml

@@ -13,6 +13,7 @@ concurrency:
 jobs:
   build:
     runs-on: docker
+    container: node:22-bookworm
     env:
       SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
     steps:
@@ -37,4 +38,4 @@ jobs:
           apt update && apt install -y rsync
           mkdir ~/.ssh
           ssh-keyscan matrix.toplap.org  > ~/.ssh/known_hosts
-          rsync -atv --delete --delete-after --progress ./website/dist/ strudel@matrix.toplap.org:/home/strudel/deploy/strudel.cc
+          rsync -atv --delete --delete-after --progress ./website/dist/ strudel@matrix.toplap.org:/home/strudel/deploy/strudel.cc

.forgejo/workflows/deploy.yml

@@ -10,6 +10,7 @@ concurrency:
 jobs:
   build:
     runs-on: docker
+    container: node:22-bookworm
     env:
       SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
     steps:
@@ -34,4 +35,4 @@ jobs:
           apt update && apt install -y rsync
           mkdir ~/.ssh
           ssh-keyscan matrix.toplap.org  > ~/.ssh/known_hosts
-          rsync -atv --delete --delete-after --progress ./website/dist/ strudel@matrix.toplap.org:/home/strudel/deploy/cold.strudel.cc
+          rsync -atv --delete --delete-after --progress ./website/dist/ strudel@matrix.toplap.org:/home/strudel/deploy/cold.strudel.cc

.forgejo/workflows/test.yml

@@ -5,6 +5,7 @@ on: [push, pull_request]
 jobs:
   build:
     runs-on: docker
+    container: node:22-bookworm
     strategy:
       matrix:
         node-version: [20]

examples/codemirror-repl/main.js

@@ -16,7 +16,7 @@ const drawContext = canvas.getContext('2d');
 const drawTime = [-2, 2]; // time window of drawn haps
 
 const editor = new StrudelMirror({
-  defaultOutput: webaudioOutput,
+  onSchedule: webaudioOutput,
   getTime: () => getAudioContext().currentTime,
   transpiler,
   root: document.getElementById('editor'),

examples/minimal-repl/main.js

@@ -12,7 +12,7 @@ registerSynthSounds();
 evalScope(import('@strudel/core'), import('@strudel/mini'), import('@strudel/webaudio'), import('@strudel/tonal'));
 
 const { evaluate } = repl({
-  defaultOutput: webaudioOutput,
+  onSchedule: webaudioOutput,
   getTime: () => ctx.currentTime,
   transpiler,
 });

packages/core/controls.mjs

@@ -118,7 +118,7 @@ export const { s, sound } = registerControl(['s', 'n', 'gain'], 'sound');
  * @param {number | Pattern} position Position in the wavetable from 0 to 1
  * @synonyms wavetablePosition
  * @example
- * s("squelch").bank("wt_digital").seg(8).note("F1").wt("0 0.25 0.5 0.75 1")
+ * s("wt_digital").seg(8).note("F1").wt("0 0.25 0.5 0.75 1")
  */
 export const { wt, wavetablePosition } = registerControl('wt', 'wavetablePosition');
 
@@ -1988,11 +1988,10 @@ export const { spread } = registerControl('spread');
  * Set dryness of reverb. See `room` and `size` for more information about reverb.
  *
  * @name dry
- * @tags superdirt
+ * @tags superdirt, superdough
  * @param {number | Pattern} dry 0 = wet, 1 = dry
  * @example
  * n("[0,3,7](3,8)").s("superpiano").room(.7).dry("<0 .5 .75 1>").osc()
- * @superdirtOnly
  *
  */
 export const { dry } = registerControl('dry');
@@ -2226,7 +2225,7 @@ export const { orbit } = registerControl('orbit', 'o');
  *   otherPat.bmod(..) (to modulate another pattern with the bus)
  *
  * @name bus
- * @tags superdirt
+ * @tags superdough
  * @param {number | Pattern} number
  */
 export const { bus } = registerControl('bus');
@@ -2235,7 +2234,7 @@ export const { bus } = registerControl('bus');
  * Postgain multiplier prior to sending the signal to the audio bus.
  *
  * @name busgain
- * @tags superdirt
+ * @tags superdough
  * @synonyms bgain
  * @param {number | Pattern} number
  */
@@ -2377,7 +2376,7 @@ export const { mode } = registerControl(['mode', 'anchor']);
  *
  * @name room
  * @tags orbit, superdough
- * @param {number | Pattern} level between 0 and 1
+ * @param {number | Pattern} level
  * @example
  * s("bd sd [~ bd] sd").room("<0 .2 .4 .6 .8 1>")
  * @example

packages/core/cyclist.mjs

@@ -10,6 +10,7 @@ import { errorLogger, logger } from './logger.mjs';
 export class Cyclist {
   constructor({
     interval,
+    onSchedule,
     onTrigger,
     onToggle,
     onError,
@@ -19,6 +20,11 @@ export class Cyclist {
     clearInterval,
     beforeStart,
   }) {
+    if (onTrigger) {
+      throw new Error(
+        'onTrigger has been dropped. use onSchedule(hap, time, cps) instead, see https://codeberg.org/uzu/strudel/pulls/2138',
+      );
+    }
     this.started = false;
     this.beforeStart = beforeStart;
     this.cps = 0.5;
@@ -63,12 +69,7 @@ export class Cyclist {
             if (hap.hasOnset()) {
               const targetTime =
                 (hap.whole.begin - this.num_cycles_at_cps_change) / this.cps + this.seconds_at_cps_change + latency;
-              const duration = hap.duration / this.cps;
+              onSchedule?.(hap, targetTime, this.cps);
-              // the following line is dumb and only here for backwards compatibility
-              // see https://codeberg.org/uzu/strudel/pulls/1004
-              const deadline = targetTime - phase;
-              // this onTrigger has another signature
-              onTrigger?.(hap, deadline, duration, this.cps, targetTime);
               if (hap.value.cps !== undefined && this.cps != hap.value.cps) {
                 this.cps = hap.value.cps;
                 this.num_ticks_since_cps_change = 0;

packages/core/euclid.mjs

@@ -59,6 +59,11 @@ export const bjorklund = function (ons, steps) {
  * really useful for computer/algorithmic music because they can
  * describe a large number of rhythms with a couple of numbers.
  *
+ * A negative number of pulses inverts the pattern
+ * so pulses happen in the gaps of the normal euclidean rhythm.
+ *
+ * A negative number of steps changes it into `euclidLegato`.
+ *
  * @memberof Pattern
  * @name euclid
  * @tags temporal
@@ -137,8 +142,38 @@ const _euclidRot = function (pulses, steps, rotation) {
   return b;
 };
 
+const _euclidLegato = function (pulses, steps, rotation, pat) {
+  var bin_pat = _euclidRot(pulses, steps, 0);
+  // Because the `gapless` algorithm logic assumes the first entry in bin_pat is a 1,
+  // we rotate the pattern so the first onset is at the start.
+  const firstOnset = bin_pat.indexOf(1);
+  bin_pat = rotate(bin_pat, firstOnset);
+  steps = Math.abs(steps);
+  const gapless = bin_pat
+    .join('')
+    .split('1')
+    .slice(1)
+    .map((s) => [s.length + 1, true]);
+  return pat.struct(timeCat(...gapless).late(Fraction(rotation + firstOnset).div(steps)));
+};
+
+const _euclid = function (pulses, steps, rotation, pat) {
+  if (steps === 0 || pulses === 0) {
+    return silence;
+  }
+  const cycles = Math.ceil(Math.abs(pulses) / Math.abs(steps));
+  const totalSteps = cycles * steps;
+  if (totalSteps < 0) {
+    return _euclidLegato(pulses, -totalSteps, rotation, pat.fast(cycles)).slow(cycles);
+  }
+  return pat
+    .fast(cycles)
+    .struct(_euclidRot(pulses, totalSteps, rotation))
+    .slow(cycles);
+};
+
 export const euclid = register('euclid', function (pulses, steps, pat) {
-  return pat.struct(_euclidRot(pulses, steps, 0));
+  return _euclid(pulses, steps, 0, pat);
 });
 
 export const bjork = register('bjork', function (euc, pat) {
@@ -146,16 +181,18 @@ export const bjork = register('bjork', function (euc, pat) {
     euc = [euc];
   }
   const [pulses, steps = pulses, rot = 0] = euc;
-  return pat.struct(_euclidRot(pulses, steps, rot));
+  return _euclid(pulses, steps, rot, pat);
 });
 
 export const { euclidrot, euclidRot } = register(['euclidrot', 'euclidRot'], function (pulses, steps, rotation, pat) {
-  return pat.struct(_euclidRot(pulses, steps, rotation));
+  return _euclid(pulses, steps, rotation, pat);
 });
 
 /**
  * Similar to `euclid`, but each pulse is held until the next pulse,
  * so there will be no gaps.
+ *
+ * A negative number of steps changes it into `euclid`.
  * @name euclidLegato
  * @memberof Pattern
  * @tags temporal
@@ -167,27 +204,16 @@ export const { euclidrot, euclidRot } = register(['euclidrot', 'euclidRot'], fun
  * note("c3").euclidLegato(3,8)
  */
 
-const _euclidLegato = function (pulses, steps, rotation, pat) {
-  if (pulses < 1) {
-    return silence;
-  }
-  const bin_pat = _euclidRot(pulses, steps, 0);
-  const gapless = bin_pat
-    .join('')
-    .split('1')
-    .slice(1)
-    .map((s) => [s.length + 1, true]);
-  return pat.struct(timeCat(...gapless)).late(Fraction(rotation).div(steps));
-};
-
 export const euclidLegato = register(['euclidLegato'], function (pulses, steps, pat) {
-  return _euclidLegato(pulses, steps, 0, pat);
+  return _euclid(pulses, -steps, 0, pat);
 });
 
 /**
  * Similar to `euclid`, but each pulse is held until the next pulse,
  * so there will be no gaps, and has an additional parameter for 'rotating'
- * the resulting sequence
+ * the resulting sequence.
+ *
+ * A negative number of steps changes it into `euclidRot`.
  * @name euclidLegatoRot
  * @memberof Pattern
  * @tags temporal
@@ -198,7 +224,7 @@ export const euclidLegato = register(['euclidLegato'], function (pulses, steps,
  * note("c3").euclidLegatoRot(3,5,2)
  */
 export const euclidLegatoRot = register(['euclidLegatoRot'], function (pulses, steps, rotation, pat) {
-  return _euclidLegato(pulses, steps, rotation, pat);
+  return _euclid(pulses, -steps, rotation, pat);
 });
 
 /**

packages/core/neocyclist.mjs

@@ -8,7 +8,12 @@ import { logger } from './logger.mjs';
 import { ClockCollator, cycleToSeconds } from './util.mjs';
 
 export class NeoCyclist {
-  constructor({ onTrigger, onToggle, getTime }) {
+  constructor({ onSchedule, onToggle, getTime, onTrigger }) {
+    if (onTrigger) {
+      throw new Error(
+        'onTrigger has been dropped. use onSchedule(hap, time, cps) instead, see https://codeberg.org/uzu/strudel/pulls/2138',
+      );
+    }
     this.started = false;
     this.cps = 0.5;
     this.getTime = getTime; // get absolute time
@@ -43,8 +48,7 @@ export class NeoCyclist {
         if (hap.hasOnset()) {
           const timeUntilTrigger = cycleToSeconds(hap.whole.begin - this.cycle, this.cps);
           const targetTime = timeUntilTrigger + currentTime + this.latency;
-          const duration = cycleToSeconds(hap.duration, this.cps);
+          onSchedule?.(hap, targetTime, this.cps);
-          onTrigger?.(hap, 0, duration, this.cps, targetTime);
         }
       });
     };

packages/core/pattern.mjs

@@ -27,6 +27,7 @@ import {
 import drawLine from './drawLine.mjs';
 import { errorLogger, logger } from './logger.mjs';
 import { strudelScope } from './evaluate.mjs';
+import { getClockTime } from './schedulerState.mjs';
 
 let stringParser;
 
@@ -504,10 +505,25 @@ export class Pattern {
 
   /**
    * Returns a new pattern with the given function applied to the list of haps returned by every query.
+   *
+   * As an end user, you will most likely not need to use this; look at `withContext`, `withHapSpan`, etc. instead.
    * @tags internals
    * @param {Function} func
    * @returns Pattern
    * @noAutocomplete
+   * @example
+   * note("[a b, c d] a b c d").s("gm_piano").withHaps(x=>{
+   *   if (x.length > 1) {
+   *     x = x.map(hap => hap.withValue(val => {
+   *       return {
+   *         n: 1,
+   *         // select gm_piano:1 sample
+   *         ...val
+   *       }
+   *     }));
+   *   }
+   *   return x
+   * })
    */
   withHaps(func) {
     const result = new Pattern((state) => func(this.query(state), state));
@@ -517,10 +533,23 @@ export class Pattern {
 
   /**
    * As with `withHaps`, but applies the function to every hap, rather than every list of haps.
+   *
+   * As an end user, you will most likely not need to use this; look at `withContext`, `withHapSpan`, etc. instead.
    * @tags internals
    * @param {Function} func
    * @returns Pattern
    * @noAutocomplete
+   * @example
+   * note("c a f e").withHap(x=>{
+   *   if (x.value.note == 'c') {
+   *     x.value.s = 'gm_piano'
+   *   }
+   *   else {
+   *     x.value.s = 'gm_piano'
+   *     x.value.n = 2
+   *   }
+   *   return x
+   * })
    */
   withHap(func) {
     return this.withHaps((haps) => haps.map(func));
@@ -850,6 +879,26 @@ export class Pattern {
     return stack(this, ...pats);
   }
 
+  stackLeft(...pats) {
+    return stackLeft(this, ...pats);
+  }
+
+  stackRight(...pats) {
+    return stackRight(this, ...pats);
+  }
+
+  stackCenter(...pats) {
+    return stackCenter(this, ...pats);
+  }
+
+  stackCentre(...pats) {
+    return stackCentre(this, ...pats);
+  }
+
+  stackRepeat(...pats) {
+    return stackRepeat(this, ...pats);
+  }
+
   sequence(...pats) {
     return sequence(this, ...pats);
   }
@@ -872,23 +921,41 @@ export class Pattern {
   //////////////////////////////////////////////////////////////////////
   // Context methods - ones that deal with metadata
 
-  onTrigger(onTrigger, dominant = true) {
+  /**
+   * Attaches a function that is called for each hap onset.
+   * @name onSchedule
+   * @memberof Pattern
+   * @example
+   * s("bd sd").onSchedule((hap, time, cps) => {
+   *   console.log('hap scheduled', time, cps);
+   * })
+   */
+  onSchedule(onSchedule, dominant = true) {
     return this.withHap((hap) =>
       hap.setContext({
         ...hap.context,
-        onTrigger: (...args) => {
+        onSchedule: (scheduleHap, t, cps) => {
           // run previously set trigger, if it exists
-          hap.context.onTrigger?.(...args);
+          hap.context.onSchedule?.(scheduleHap, t, cps);
-          onTrigger(...args);
+          onSchedule(scheduleHap, t, cps);
         },
-        // if dominantTrigger is set to true, the default output (webaudio) will be disabled
+        // if dominantSchedule is set to true, the default output (webaudio) will be disabled
         // when using multiple triggers, you cannot flip this flag to false again!
         // example: x.csound('CooLSynth').log() as well as x.log().csound('CooLSynth') should work the same
-        dominantTrigger: hap.context.dominantTrigger || dominant,
+        dominantSchedule: hap.context.dominantSchedule || dominant,
       }),
     );
   }
 
+  // legacy:
+  onTrigger(onTrigger, dominant = true) {
+    console.warn('onTrigger is deprecated.. use onSchedule(hap, time, cps) instead');
+    return this.onSchedule((hap, t, cps) => {
+      const currentTime = getClockTime();
+      return onTrigger(hap, currentTime, cps, t);
+    }, dominant);
+  }
+
   /**
    * Writes the content of the current event to the console (visible in the side menu).
    * @tags visualization
@@ -898,7 +965,7 @@ export class Pattern {
    * s("bd sd").log()
    */
   log(func = (hap) => `[hap] ${hap.showWhole(true)}`, getData = (hap) => ({ hap })) {
-    return this.onTrigger((...args) => {
+    return this.onSchedule((...args) => {
       logger(func(...args), undefined, getData(...args));
     }, false);
   }
@@ -1074,7 +1141,7 @@ const COMPOSERS = {
    * @param {Pattern} pat
    * @returns {Pattern}
    * @memberof Pattern
-   * @tags internal, combiners
+   * @tags internals, combiners
    * @example
    * // because input pattern has `s` set,
    * // it overrides the "sine" declared earlier
@@ -1099,7 +1166,7 @@ const COMPOSERS = {
    * @param {Pattern} pat
    * @memberof Pattern
    * @returns {Pattern}
-   * @tags internal, combiners
+   * @tags internals, combiners
    * @example
    * // notes, already defined, will stay "c a f e",
    * // while "s", not defined, will be set to "piano"
@@ -1156,24 +1223,163 @@ const COMPOSERS = {
    * @tags math
    */
   div: [numeralArgs((a, b) => a / b)],
+  /**
+   *
+   * Divides each number by the given factor and returns the remainder
+   * @name mod
+   * @memberof Pattern
+   * @tags math
+   */
   mod: [numeralArgs(_mod)],
+  /**
+   *
+   * Raises each number to the power of the given factor
+   * @name pow
+   * @memberof Pattern
+   * @tags math
+   */
   pow: [numeralArgs(Math.pow)],
+  /**
+   *
+   * Performs a bitwise `and` on each number and the given factor
+   * @name band
+   * @memberof Pattern
+   * @tags math
+   */
   band: [numeralArgs((a, b) => a & b)],
+  /**
+   *
+   * Performs a bitwise `or` on each number and the given factor
+   * @name bor
+   * @memberof Pattern
+   * @tags math
+   */
   bor: [numeralArgs((a, b) => a | b)],
+  /**
+   *
+   * Performs a bitwise `xor` on each number and the given factor
+   * @name bxor
+   * @memberof Pattern
+   * @tags math
+   */
   bxor: [numeralArgs((a, b) => a ^ b)],
+  /**
+   *
+   * Performs a bitwise `left shift` on each number by the given factor
+   * @name blshift
+   * @memberof Pattern
+   * @tags math
+   */
   blshift: [numeralArgs((a, b) => a << b)],
+  /**
+   *
+   * Performs a bitwise `right shift` on each number by the given factor
+   * @name brshift
+   * @memberof Pattern
+   * @tags math
+   */
   brshift: [numeralArgs((a, b) => a >> b)],
 
   // TODO - force numerical comparison if both look like numbers?
+  /**
+   * performs a < b
+   * @name lt
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   lt: [(a, b) => a < b],
+  /**
+   * performs a > b
+   * @name gt
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   gt: [(a, b) => a > b],
+  /**
+   * performs a <= b
+   * @name lte
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   lte: [(a, b) => a <= b],
+  /**
+   * performs a >= b
+   * @name gte
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   gte: [(a, b) => a >= b],
+  /**
+   * performs a == b
+   * @name eq
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   eq: [(a, b) => a == b],
+  /**
+   * performs a === b (strictly equal)
+   * @name eqt
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   eqt: [(a, b) => a === b],
+  /**
+   * performs a != b
+   * @name ne
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   ne: [(a, b) => a != b],
+  /**
+   * performs a !== b (strictly not equal)
+   * @name net
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   net: [(a, b) => a !== b],
+  /**
+   * performs a && b
+   * @name and
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   and: [(a, b) => a && b],
+  /**
+   * performs a || b
+   * @name or
+   * @memberof Pattern
+   * @tags math
+   * @param {any} a
+   * @param {any} b
+   * @returns Pattern with boolean value(s)
+   */
   or: [(a, b) => a || b],
 
   //  bitwise ops
@@ -1449,7 +1655,19 @@ export function sequenceP(pats) {
 export function stack(...pats) {
   // Array test here is to avoid infinite recursions..
   pats = pats.map((pat) => (Array.isArray(pat) ? sequence(...pat) : reify(pat)));
-  const query = (state) => flatten(pats.map((pat) => pat.query(state)));
+  const query = (state) =>
+    flatten(
+      pats.map((pat) => {
+        try {
+          // An error occurring in one part of the stack should not break
+          // playback of the other parts of the stack.
+          return pat.query(state);
+        } catch (e) {
+          errorLogger(e);
+          return [];
+        }
+      }),
+    );
   const result = new Pattern(query);
   if (__steps) {
     result._steps = lcm(...pats.map((pat) => pat._steps));
@@ -1470,6 +1688,18 @@ function _stackWith(func, pats) {
   return stack(...func(steps, pats));
 }
 
+/**
+ * The input patterns are aligned to the left, with silence padded to the shorter pattern(s) in the final steps if there's a stepcount disparity. See also `stackRight` and `stackCenter/stackCentre`
+ *
+ * @name stackLeft
+ * @tags temporal, stepwise, combiners
+ * @return {Pattern}
+ * @example
+ * stackLeft("0 1 2 3", "3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ * @example
+ * // chainable
+ * "0 1 2 3".stackLeft("3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ */
 export function stackLeft(...pats) {
   return _stackWith(
     (steps, pats) => pats.map((pat) => (pat._steps.eq(steps) ? pat : stepcat(pat, gap(steps.sub(pat._steps))))),
@@ -1477,6 +1707,18 @@ export function stackLeft(...pats) {
   );
 }
 
+/**
+ * The input patterns are aligned to the right, with silence padded to the shorter pattern(s) in the initial steps if there's a stepcount disparity. See also `stackLeft` and `stackCenter/stackCentre`
+ *
+ * @name stackRight
+ * @tags temporal, stepwise, combiners
+ * @return {Pattern}
+ * @example
+ * stackRight("0 1 2 3", "3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ * @example
+ * // chainable
+ * "0 1 2 3".stackRight("3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ */
 export function stackRight(...pats) {
   return _stackWith(
     (steps, pats) => pats.map((pat) => (pat._steps.eq(steps) ? pat : stepcat(gap(steps.sub(pat._steps)), pat))),
@@ -1484,7 +1726,19 @@ export function stackRight(...pats) {
   );
 }
 
-export function stackCentre(...pats) {
+/**
+ * The input patterns are aligned to the right, with silence padded to the shorter pattern(s) in the initial steps if there's a stepcount disparity. See also `stackLeft` and `stackRight`
+ * @name stackCenter
+ * @tags temporal, stepwise, combiners
+ * @synonyms stackCentre
+ * @return {Pattern}
+ * @example
+ * stackCenter("0 1 2 3", "3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ * @example
+ * // chainable
+ * "0 1 2 3".stackCenter("3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ */
+export function stackCenter(...pats) {
   return _stackWith(
     (steps, pats) =>
       pats.map((pat) => {
@@ -1498,6 +1752,25 @@ export function stackCentre(...pats) {
   );
 }
 
+export function stackCentre(...pats) {
+  return stackCenter(...pats);
+}
+
+/**
+ * Shorthand for `pm(patterns).pace(m)` where m is the max step count in the input patterns
+ * @name stackRepeat
+ * @tags temporal, stepwise, combiners
+ * @return {Pattern}
+ * @example
+ * stackRepeat("0 1 2 3", "3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ * @example
+ * // chainable
+ * "0 1 2 3".stackRepeat("3 4", "[4 5 6] 7 8 9 10").scale("c:minor").note()
+ */
+export function stackRepeat(...pats) {
+  return stackBy(reify('repeat'), ...pats);
+}
+
 export function stackBy(by, ...pats) {
   const [left, ...right] = pats.map((pat) => pat._steps);
   const steps = left.maximum(...right);
@@ -1612,10 +1885,10 @@ export function arrange(...sections) {
  * @tags combiners
  * @return {Pattern}
  * @example
-seqPLoop(
+ * seqPLoop(
-  [0, 2, "bd(3,8)"],
+ * [0, 2, "bd(3,8)"],
-  [1, 3, "cp(3,8)"]
+ * [1, 3, "cp(3,8)"]
-).sound()
+ * ).sound()
  */
 export function seqPLoop(...parts) {
   let total = Fraction(0);
@@ -2292,11 +2565,11 @@ export const { zoomArc, zoomarc } = register(['zoomArc', 'zoomarc'], function (a
  * @param {number} slices to play
  * @example
  * note("0 1 2 3 4 5 6 7".scale('c:mixolydian'))
- *.bite(4, "3 2 1 0")
+ * .bite(4, "3 2 1 0")
  * @example
  * sound("bd - bd bd*2, - sd:6 - sd:5 sd:1 - [- sd:2] -, hh [- cp:7]")
-  .bank("RolandTR909").speed(1.2)
+ * .bank("RolandTR909").speed(1.2)
-  .bite(4, "0 0 [1 2] <3 2> 0 0 [2 1] 3")
+ * .bite(4, "0 0 [1 2] <3 2> 0 0 [2 1] 3")
  */
 export const bite = register(
   'bite',
@@ -2313,6 +2586,74 @@ export const bite = register(
   false,
 );
 
+/**
+ * Similar to `struct`, but every hap in the structure pattern plays the next
+ * cycle of the main pattern.
+ * With a different number of cycles in the main pattern and haps in the
+ * structure pattern, this creates an isorhythm.
+ *
+ * Note: This function works on the assumption that the structure pattern
+ * repeats every cycle. If the structure pattern only repeats after multiple
+ * cycles, it may skip or repeat certain parts of the melody.
+ * @tags temporal
+ * @name isobite
+ * @synonyms cycleStruct, cyclestruct
+ * @memberof Pattern
+ * @param {Pattern} structure structure of the pattern
+ * @example
+ * "<0 1 2 3 4 5>".isobite("[x - x*2]*2").n().scale("c:major")
+ * // the same as "0 - [1 2] 3 - [4 5]".n().scale("c:major")
+ *
+ * @example
+ * "<0 1 2 3 4>".isobite("x - x").n().scale("c:major")
+ * // the same as "<[0 - 1] [2 - 3] [4 - 0] [1 - 2] [3 - 4]>".n().scale("c:major")
+ *
+ * @example
+ * // Here the structure pattern repeats after 2 cycles,
+ * // so certain haps from the melody are skipped.
+ * "<0 1 2 3>".isobite("x x*2".slow(2)).n().scale("c:major")
+ * // the same as "<[0] [2 3] [2] [2 3]>".n().scale("c:major")
+ *
+ * @example
+ * // This can be avoided by making the struct pattern 1 cycle,
+ * // and slowing the whole pattern down as follows:
+ * "<0 1 2 3>".isobite("x x*2").slow(2).n().scale("c:major")
+ * // the same as "<[0] [1 2] [3] [0 1] [2] [3 0] [1] [2 3]>".n().scale("c:major")
+ */
+export const { isobite, cyclestruct, cycleStruct } = register(
+  ['isobite', 'cyclestruct', 'cycleStruct'],
+  (structure, pat) => {
+    const structPat = new Pattern((state) => {
+      const haps_cycle = structure
+        .withQuerySpan((span) => span.begin.wholeCycle())
+        .query(state)
+        .filter((hap) => hap.value != 0)
+        .sort((a, b) => a.whole.begin - b.whole.begin)
+        .map((hap, i) => hap.withValue((_) => i));
+
+      const haps = [];
+      for (const hap of haps_cycle) {
+        const new_part = state.span.intersection(hap.part);
+        if (new_part) {
+          haps.push(new Hap(hap.whole, new_part, hap.value, hap.context));
+        }
+      }
+      return haps;
+    }).splitQueries();
+
+    const stepsPattern = new Pattern((state) => {
+      const nrHaps = structure
+        .withQuerySpan((span) => span.begin.wholeCycle())
+        .query(state)
+        .filter((hap) => hap.value != 0).length;
+      return [new Hap(state.span.begin.wholeCycle(), state.span, nrHaps, {})];
+    }).splitQueries();
+
+    return pat.fast(stepsPattern).bite(stepsPattern, structPat);
+  },
+  false,
+);
+
 /**
  * Selects the given fraction of the pattern and repeats that part to fill the remainder of the cycle.
  * @tags temporal
@@ -2419,8 +2760,12 @@ export const off = register('off', function (time_pat, func, pat) {
  * Returns a new pattern where every other cycle is played once, twice as
  * fast, and offset in time by one quarter of a cycle. Creates a kind of
  * breakbeat feel.
+ * @name brak
  * @tags temporal
  * @returns Pattern
+ * @memberof Pattern
+ * @example
+ * s("bd hh!2 rim").brak()
  */
 export const brak = register('brak', function (pat) {
   return pat.when(slowcat(false, true), (x) => fastcat(x, silence)._late(0.25));
@@ -2909,10 +3254,29 @@ export const { ribbon, rib } = register(['ribbon', 'rib'], (offset, cycles, pat)
   pat.early(offset).restart(pure(1).slow(cycles)),
 );
 
+/**
+ * Sets the pattern's color to the given [hsla](https://www.w3schools.com/htmL/html_colors_hsl.asp)
+ *
+ * @name hsla
+ * @param {Number} hue (0 - 360)
+ * @param {Number} saturation percentage (0 - 100)
+ * @param {Number} lightness percentage (0 - 100)
+ * @param {Number} alpha (transparency) (0.0 - 1.0)
+ * @tags visualization
+ */
 export const hsla = register('hsla', (h, s, l, a, pat) => {
   return pat.color(`hsla(${h}turn,${s * 100}%,${l * 100}%,${a})`);
 });
 
+/**
+ * Sets the pattern's color to the given [hsl](https://www.w3schools.com/htmL/html_colors_hsl.asp)
+ *
+ * @name hsl
+ * @param {Number} hue (0 - 360)
+ * @param {Number} saturation percentage (0 - 100)
+ * @param {Number} lightness percentage (0 - 100)
+ * @tags visualization
+ */
 export const hsl = register('hsl', (h, s, l, pat) => {
   return pat.color(`hsl(${h}turn,${s * 100}%,${l * 100}%)`);
 });
@@ -3268,7 +3632,7 @@ export const drop = stepRegister('drop', function (i, pat) {
  * @tags stepwise
  * @example
  * stepcat(
- *   sound("bd bd - cp").extend(2),
+ *   sound("bd bd - <cp hh>").extend(2),
  *   sound("bd - sd -")
  * ).pace(8)
  */
@@ -3279,15 +3643,12 @@ export const extend = stepRegister('extend', function (factor, pat) {
 /**
  * *Experimental*
  *
- * `replicate` is similar to `fast` in that it increases its density, but it also increases the step count
+ * `replicate` is similar to `extend`, except that `replicate` will "replicate" the thing being extended. This will only differ from `extend` when the input pattern differs from cycle to cycle.
- * accordingly. So `stepcat("a b".replicate(2), "c d")` would be the same as `"a b a b c d"`, whereas
- * `stepcat("a b".fast(2), "c d")` would be the same as `"[a b] [a b] c d"`.
  *
- * TODO: find out how this function differs from extend
  * @tags stepwise
  * @example
  * stepcat(
- *   sound("bd bd - cp").replicate(2),
+ *   sound("bd bd - <cp hh>").replicate(2),
  *   sound("bd - sd -")
  * ).pace(8)
  */
@@ -3383,8 +3744,8 @@ export const growlist = (amount, pat) => pat.growlist(amount);
  * "tha dhi thom nam".shrink("1 -1").sound().bank("mridangam").pace(4)
  * @example
  * note("0 1 2 3 4 5 6 7".scale("C:ritusen")).sound("folkharp")
-   .shrink("1 -1").pace(8)
+ * .shrink("1 -1").pace(8)
-
+ *
  */
 
 export const shrink = register(
@@ -3423,7 +3784,7 @@ export const shrink = register(
  * "tha dhi thom nam".grow("1 -1").sound().bank("mridangam").pace(4)
  * @example
  * note("0 1 2 3 4 5 6 7".scale("C:ritusen")).sound("folkharp")
-   .grow("1 -1").pace(8)
+ * .grow("1 -1").pace(8)
  */
 
 export const grow = register(
@@ -3447,17 +3808,17 @@ export const grow = register(
 
 /**
  * *Experimental*
- * 
+ *
- * Inserts a pattern into a list of patterns. On the first repetition it will be inserted at the end of the list, then moved backwards through the list 
+ * Inserts a pattern into a list of patterns. On the first repetition it will be inserted at the end of the list, then moved backwards through the list
- * on successive repetitions. The patterns are added together stepwise, with all repetitions taking place over a single cycle. Using `pace` to set the 
+ * on successive repetitions. The patterns are added together stepwise, with all repetitions taking place over a single cycle. Using `pace` to set the
  * number of steps per cycle is therefore usually recommended.
  *
  * @tags stepwise
  * @return {Pattern}
  * @example
  * "[c g]".tour("e f", "e f g", "g f e c").note()
-   .sound("folkharp")
+ * .sound("folkharp")
-   .pace(8)
+ * .pace(8)
  */
 export const tour = function (pat, ...many) {
   return pat.tour(...many);
@@ -3475,16 +3836,16 @@ Pattern.prototype.tour = function (...many) {
 
 /**
  * *Experimental*
- * 
+ *
- * 'zips' together the steps of the provided patterns. This can create a long repetition, taking place over a single, dense cycle. 
+ * 'zips' together the steps of the provided patterns. This can create a long repetition, taking place over a single, dense cycle.
  * Using `pace` to set the number of steps per cycle is therefore usually recommended.
- * 
+ *
  * @tags stepwise
  * @returns {Pattern}
  * @example
  * zip("e f", "e f g", "g [f e] a f4 c").note()
-   .sound("folkharp")
+ * .sound("folkharp")
-   .pace(8)
+ * .pace(8)
  */
 export const zip = function (...pats) {
   pats = pats.filter((pat) => pat.hasSteps);
@@ -3647,9 +4008,9 @@ export const slice = register(
  * s("bd!8").onTriggerTime((hap) => {console.log(hap)})
  */
 Pattern.prototype.onTriggerTime = function (func) {
-  return this.onTrigger((hap, currentTime, _cps, targetTime) => {
+  return this.onSchedule((hap, targetTime) => {
-    const diff = targetTime - currentTime;
+    const diff = targetTime - getClockTime();
-    window.setTimeout(() => {
+    setTimeout(() => {
       func(hap);
     }, diff * 1000);
   }, false);

packages/core/pick.mjs

@@ -104,6 +104,8 @@ export const pickmodF = register('pickmodF', function (pickPattern, lookup, pat)
  * @param {Pattern} pat
  * @param {*} xs
  * @returns {Pattern}
+ * @example
+ * note("<0*4 1 2*2 3*3>".pickOut(["g a", "e f", "f g f g" , "g c d"]))
  */
 export const pickOut = register('pickOut', function (lookup, pat) {
   return _pick(lookup, pat, false).outerJoin();

packages/core/repl.mjs

@@ -7,13 +7,15 @@ import {
   setIsStarted,
   setPattern as exposeSchedulerPattern,
   setTime,
-  setTriggerFunc,
+  setScheduleFunc,
+  setClockTime,
 } from './schedulerState.mjs';
 import { evalScope } from './evaluate.mjs';
 import { register, Pattern, isPattern, silence, stack } from './pattern.mjs';
 import { reset_state } from './impure.mjs';
 
 export function repl({
+  onSchedule,
   defaultOutput,
   onEvalError,
   beforeEval,
@@ -30,6 +32,11 @@ export function repl({
   id,
   mondo = false,
 }) {
+  if (defaultOutput) {
+    throw new Error(
+      'defaultOutput has been removed. use onSchedule(hap, time, cps) instead. see https://codeberg.org/uzu/strudel/pulls/2138/',
+    );
+  }
   const state = {
     schedulerError: undefined,
     evalError: undefined,
@@ -55,7 +62,7 @@ export function repl({
   };
 
   const schedulerOptions = {
-    onTrigger: getTrigger({ defaultOutput, getTime }),
+    onSchedule: getSchedule({ onSchedule }),
     getTime,
     onToggle: (started) => {
       updateState({ started });
@@ -73,7 +80,7 @@ export function repl({
   // NeoCyclist uses a shared worker to communicate between instances, which is not supported on mobile chrome
   const scheduler =
     sync && typeof SharedWorker != 'undefined' ? new NeoCyclist(schedulerOptions) : new Cyclist(schedulerOptions);
-  setTriggerFunc(schedulerOptions.onTrigger);
+  setScheduleFunc(schedulerOptions.onSchedule);
   setCpsFunc(() => scheduler.cps);
   let pPatterns = {};
   let anonymousIndex = 0;
@@ -224,6 +231,7 @@ export function repl({
     return pattern;
   };
   setTime(() => scheduler.now()); // TODO: refactor?
+  setClockTime(() => scheduler.getTime()); // TODO: refactor?
 
   // Helper function to apply pattern transformations (solo, each, all)
   // this should be abstracted more
@@ -407,6 +415,7 @@ export function repl({
       updateState({ code, pending: true });
       await injectPatternMethods();
       setTime(() => scheduler.now()); // TODO: refactor?
+      setClockTime(() => scheduler.getTime()); // TODO: refactor?
       await beforeEval?.({ code, blockBased: false });
       allTransforms = []; // reset all transforms
 
@@ -452,6 +461,7 @@ export function repl({
       updateState({ code, pending: true });
       await injectPatternMethods();
       setTime(() => scheduler.now()); // TODO: refactor?
+      setClockTime(() => scheduler.getTime()); // TODO: refactor?
       await beforeEval?.({ code, blockBased: true });
       allTransforms = []; // reset all transforms
 
@@ -560,20 +570,17 @@ export function repl({
   return { scheduler, evaluate, evaluateBlock, start, stop, pause, setCps, setPattern, setCode, toggle, state };
 }
 
-export const getTrigger =
+export const getSchedule =
-  ({ getTime, defaultOutput }) =>
+  ({ onSchedule }) =>
-  async (hap, deadline, duration, cps, t) => {
+  async (hap, t, cps) => {
-    //   ^ this signature is different from hap.context.onTrigger, as set by Pattern.onTrigger(onTrigger)
-    // TODO: get rid of deadline after https://codeberg.org/uzu/strudel/pulls/1004
     try {
-      if (!hap.context.onTrigger || !hap.context.dominantTrigger) {
+      if (!hap.context.onSchedule || !hap.context.dominantSchedule) {
-        await defaultOutput(hap, deadline, duration, cps, t);
+        await onSchedule(hap, t, cps);
       }
-      if (hap.context.onTrigger) {
+      if (hap.context.onSchedule) {
-        // call signature of output / onTrigger is different...
+        await hap.context.onSchedule(hap, t, cps);
-        await hap.context.onTrigger(hap, getTime(), cps, t);
       }
     } catch (err) {
-      errorLogger(err, 'getTrigger');
+      errorLogger(err, 'getSchedule');
     }
   };

packages/core/schedulerState.mjs

@@ -7,8 +7,14 @@ This program is free software: you can redistribute it and/or modify it under th
 let time;
 let cpsFunc;
 let pattern;
-let triggerFunc;
+let scheduleFunc;
 let isStarted;
+
+/**
+ * @name getTime
+ * @tags internals
+ * @returns {Number} the current cycle time as a number
+ */
 export function getTime() {
   if (!time) {
     throw new Error('no time set! use setTime to define a time source');
@@ -20,10 +26,32 @@ export function setTime(func) {
   time = func;
 }
 
+let clockTime;
+/**
+ * @name getClockTime
+ * @tags internals
+ * @returns {Number} the current clock time in seconds (onSchedule time)
+ */
+export function getClockTime() {
+  if (!clockTime) {
+    throw new Error('no clockTime set! use setClockTime to define a time source');
+  }
+  return clockTime();
+}
+
+export function setClockTime(func) {
+  clockTime = func;
+}
+
 export function setCpsFunc(func) {
   cpsFunc = func;
 }
 
+/**
+ * @name getCps
+ * @tags internals
+ * @returns {Number} the current cycles per second
+ */
 export function getCps() {
   return cpsFunc?.();
 }
@@ -36,12 +64,12 @@ export function getPattern() {
   return pattern;
 }
 
-export function setTriggerFunc(func) {
+export function setScheduleFunc(func) {
-  triggerFunc = func;
+  scheduleFunc = func;
 }
 
-export function getTriggerFunc() {
+export function getScheduleFunc() {
-  return triggerFunc;
+  return scheduleFunc;
 }
 
 export function setIsStarted(val) {

packages/core/signal.mjs

@@ -5,7 +5,7 @@ This program is free software: you can redistribute it and/or modify it under th
 */
 
 import { Hap } from './hap.mjs';
-import { Pattern, fastcat, pure, register, reify, silence, stack, sequenceP } from './pattern.mjs';
+import { Pattern, fastcat, pure, register, reify, silence, stack, sequenceP, isPattern } from './pattern.mjs';
 import { _mod } from './util.mjs';
 import Fraction from './fraction.mjs';
 
@@ -16,6 +16,24 @@ export function steady(value) {
   return new Pattern((state) => [new Hap(undefined, state.span, value)]);
 }
 
+/**
+ * Creates a signal given by the input function
+ *
+ * @name signal
+ * @param {*} func
+ * @returns {Pattern} signal
+ * @tags generators
+ * @example
+ * // sawtooth signal definition
+ * signal(t=>t%1).segment(16).range(30,40).note()
+ * @example
+ * signal(t=>Math.pow(t,2)%1).range(40, 60).add(5).segment(16)
+ * .off(0, x=>x.add(7))
+ * .note()
+ * .s("gm_electric_guitar_jazz,gm_epiano")
+ *   .gain(1.7)
+ * .pianoroll()
+ */
 export const signal = (func) => {
   const query = (state) => [new Hap(undefined, state.span, func(state.span.begin, state.controls))];
   return new Pattern(query);
@@ -189,6 +207,7 @@ export const time = signal(id);
 /**
  *  The mouse's x position value ranges from 0 to 1.
  * @name mousex
+ * @synonyms mouseX
  * @return {Pattern}
  * @tags external_io
  * @example
@@ -199,6 +218,7 @@ export const time = signal(id);
 /**
  *  The mouse's y position value ranges from 0 to 1.
  * @name mousey
+ * @synonyms mouseY
  * @return {Pattern}
  * @tags external_io
  * @example
@@ -559,6 +579,9 @@ export const __chooseWith = (pat, xs) => {
  * @returns {Pattern}
  * @example
  * note("c2 g2!2 d2 f1").s(chooseWith(sine.fast(2), ["sawtooth", "triangle", "bd:6"]))
+ * @example
+ * // Compare with chooseInWith
+ * note(chooseWith("<0 0.5 1>*3", ["c3", "b3", "d3"]))
  */
 export const chooseWith = (pat, xs) => {
   return __chooseWith(pat, xs).outerJoin();
@@ -570,6 +593,13 @@ export const chooseWith = (pat, xs) => {
  * @tags temporal
  * @param {Pattern} pat
  * @param {*} xs
+ * @example
+ * // Because the structure comes from the chosen values (the notes, here)
+ * // The choosing pattern will only advance once per cycle (not 3 times per cycle)
+ * note(chooseInWith("<0 0.5 1>*3", ["c3", "b3", "d3"]))
+ * @example
+ * // Here, the chosen values have a structure such that the choosing pattern will advance 3 times per cycle
+ * note(chooseInWith("<0 0.5 1>*3", ["c3*3", "b3*3", "d3*3"]))
  * @returns {Pattern}
  */
 export const chooseInWith = (pat, xs) => {
@@ -586,9 +616,7 @@ export const chooseInWith = (pat, xs) => {
  */
 export const choose = (...xs) => chooseWith(rand, xs);
 
-// todo: doc
 export const chooseIn = (...xs) => chooseInWith(rand, xs);
-export const chooseOut = choose;
 
 /**
  * Chooses from the given list of values (or patterns of values), according
@@ -734,12 +762,30 @@ export const perlin = signal((t, controls) => _perlin(t, controls.randSeed));
  */
 export const berlin = signal((t, controls) => _berlin(t, controls.randSeed));
 
-export const degradeByWith = register(
+/**
-  'degradeByWith',
+ * `degradeByWith` is like `degradeBy`, but with control over the random or other signal used to filter out the events.
-  (withPat, x, pat) => pat.fmap((a) => (_) => a).appLeft(withPat.filterValues((v) => v > x)),
+ *
-  true,
+ * `degradeBy(x)` is essentially `degradeByWith(rand, x)`
-  true,
+ *
-);
+ * This allows you to do things other than with `rand`, see examples below
+ *
+ * @name degradeByWith
+ * @param {Pattern|number} test
+ * @param {Pattern|number} testAgainst
+ * @memberof Pattern
+ * @tags temporal
+ * @returns {Pattern}
+ * @example
+ * note("c a f e").degradeByWith(sine, .1)
+ * @example
+ * note("c a f e").degradeByWith(perlin, .5)
+ * @example
+ * note("c a f e").degradeByWith(sine, cosine)
+ */
+export const degradeByWith = register('degradeByWith', (withPat, x, pat) => {
+  if (!isPattern(withPat)) withPat = pure(withPat);
+  return pat.fmap((a) => (_) => a).appLeft(withPat.filterValues((v) => v > x));
+});
 
 /**
  * Randomly removes events from the pattern by a given amount.

packages/core/speak.mjs

@@ -32,7 +32,7 @@ function triggerSpeech(words, lang, voice) {
 }
 
 export const speak = register('speak', function (lang, voice, pat) {
-  return pat.onTrigger((hap) => {
+  return pat.onSchedule((hap) => {
     triggerSpeech(hap.value, lang, voice);
   });
 });

packages/core/test/euclid.test.js

@@ -29,6 +29,44 @@ describe('euclid', () => {
         .map((a) => a.showWhole(true)),
     ).toStrictEqual(['0/1 → 1/8: a', '1/4 → 3/8: a', '3/8 → 1/2: a', '5/8 → 3/4: a', '3/4 → 7/8: a']);
   });
+  it('Can create euclidLegato using negative steps', () => {
+    expect(
+      fastcat('a')
+        .euclid(3, -8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    ).toStrictEqual(
+      fastcat('a')
+        .euclidLegato(3, 8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    );
+    expect(
+      fastcat('a')
+        .euclid(5, -8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    ).toStrictEqual(
+      fastcat('a')
+        .euclidLegato(5, 8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    );
+  });
+  it('stretches over multiple cycles if pulses is greater than steps', () => {
+    expect(
+      fastcat('a')
+        .euclid(5, 4)
+        .fast(2)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    ).toStrictEqual(['0/1 → 1/8: a', '1/4 → 3/8: a', '3/8 → 1/2: a', '5/8 → 3/4: a', '3/4 → 7/8: a']);
+  });
 });
 
 describe('euclidRot', () => {
@@ -67,6 +105,45 @@ describe('euclidLegato', () => {
         .map((a) => a.showWhole(true)),
     ).toStrictEqual(['0/1 → 1/4: a', '1/4 → 3/8: a', '3/8 → 5/8: a', '5/8 → 3/4: a', '3/4 → 1/1: a']);
   });
+  it('Can create euclid using negative steps', () => {
+    expect(
+      fastcat('a')
+        .euclidLegato(3, -8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    ).toStrictEqual(
+      fastcat('a')
+        .euclid(3, 8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    );
+    expect(
+      fastcat('a')
+        .euclidLegato(5, -8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    ).toStrictEqual(
+      fastcat('a')
+        .euclid(5, 8)
+        .firstCycle()
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    );
+  });
+  it('stretches over multiple cycles if pulses is greater than steps', () => {
+    expect(
+      fastcat('a')
+        .euclidLegato(5, 4)
+        .fast(2)
+        .firstCycle()
+        .filter((hap) => hap.hasOnset())
+        .sort((a, b) => a.part.begin.sub(b.part.begin))
+        .map((a) => a.showWhole(true)),
+    ).toStrictEqual(['0/1 → 1/4: a', '1/4 → 3/8: a', '3/8 → 5/8: a', '5/8 → 3/4: a', '3/4 → 1/1: a']);
+  });
 });
 
 describe('euclidLegatoRot', () => {

packages/core/test/pattern.test.mjs

@@ -58,7 +58,7 @@ import {
   arp,
 } from '../index.mjs';
 
-import { log, logValues } from '../pattern.mjs';
+import { log, logValues, stackCenter } from '../pattern.mjs';
 
 import { steady } from '../signal.mjs';
 
@@ -75,6 +75,10 @@ const sameFirst = (a, b) => {
   return expect(a.sortHapsByPart().firstCycle()).toStrictEqual(b.sortHapsByPart().firstCycle());
 };
 
+const sameFirstX = (x, a, b) => {
+  return expect(a.fast(x).sortHapsByPart().firstCycle()).toStrictEqual(b.fast(x).sortHapsByPart().firstCycle());
+};
+
 describe('TimeSpan', () => {
   describe('equals()', () => {
     it('Should be equal to the same value', () => {
@@ -1215,6 +1219,7 @@ describe('Pattern', () => {
       expect(stackRight(fastcat(0, 1, 2), fastcat(3, 4))._steps).toStrictEqual(Fraction(3));
       // maybe this should double when they are either all even or all odd
       expect(stackCentre(fastcat(0, 1, 2), fastcat(3, 4))._steps).toStrictEqual(Fraction(3));
+      expect(stackCenter(fastcat(0, 1, 2), fastcat(3, 4))._steps).toStrictEqual(Fraction(3));
       expect(fastcat(0, 1).ply(3)._steps).toStrictEqual(Fraction(6));
       expect(fastcat(0, 1).setSteps(undefined).ply(3)._steps).toStrictEqual(undefined);
       expect(fastcat(0, 1).fast(3)._steps).toStrictEqual(Fraction(2));
@@ -1320,6 +1325,21 @@ describe('Pattern', () => {
       );
     });
   });
+  describe('isobite', () => {
+    it('can play a melody with a structure', () => {
+      sameFirst(
+        slowcat(0, 1, 2, 3, 4, 5).isobite(fastcat(true, silence, [true, true]).fast(2)),
+        fastcat(0, silence, [1, 2], 3, silence, [4, 5]),
+      );
+    });
+    it('syncopates over multiple cycles if the number of haps in the patterns differ', () => {
+      sameFirstX(
+        4,
+        slowcat(0, 1, 2, 3).isobite(fastcat(true, [true, true])),
+        slowcat(0, [1, 2], 3, [0, 1], 2, [3, 0], 1, [2, 3]).fast(2),
+      );
+    });
+  });
   describe('unjoin', () => {
     it('destructures a pattern into subcycles', () => {
       sameFirst(
@@ -1363,7 +1383,7 @@ describe('Pattern', () => {
 
       // Force a trigger
       haps.forEach((hap) => {
-        hap.context?.onTrigger?.(hap);
+        hap.context?.onSchedule?.(hap);
       });
 
       expect(mockConsoleLog).toHaveBeenCalledWith(
@@ -1381,7 +1401,7 @@ describe('Pattern', () => {
 
       // Force a trigger
       haps.forEach((hap) => {
-        hap.context?.onTrigger?.(hap);
+        hap.context?.onSchedule?.(hap);
       });
 
       expect(mockConsoleLog).toHaveBeenCalledWith(

packages/core/util.mjs

@@ -70,17 +70,6 @@ export const getEventOffsetMs = (targetTimeSeconds, currentTimeSeconds) => {
   return (targetTimeSeconds - currentTimeSeconds) * 1000;
 };
 
-/**
- * @deprecated does not appear to be referenced or invoked anywhere in the codebase
- * @noAutocomplete
- */
-export const getFreq = (noteOrMidi) => {
-  if (typeof noteOrMidi === 'number') {
-    return midiToFreq(noteOrMidi);
-  }
-  return midiToFreq(noteToMidi(noteOrMidi));
-};
-
 const pcs = ['C', 'Db', 'D', 'Eb', 'E', 'F', 'Gb', 'G', 'Ab', 'A', 'Bb', 'B'];
 /**
  * @deprecated only used in workshop (first-notes)
@@ -130,8 +119,31 @@ export const getPlayableNoteValue = (hap) => {
   return note;
 };
 
+/**
+ * Given a hap, returns the frequency of the note or freq, if defined
+ *
+ * Given a note, returns the frequency of that note
+ * `getFreq('c3')`
+ *
+ * Given a midi note number, returns the frequency of that midi note
+ * `getFreq('c3')`
+ *
+ * @name getFrequency
+ * @tags pitch
+ * @synonyms getFreq
+ * @param {Hap | note | number} input
+ * @returns {Number}
+ * @example
+ * i("4 8 9 10 - - 5 7 9 11 - -").tune("tranh3")
+ * .mul(getFreq('c3'))
+ * .freq().clip(.5).room(1)
+ */
 export const getFrequency = (hap) => {
-  let { value, context } = hap;
+  let { value, context } =
+    typeof hap == 'object'
+      ? hap
+      : // default: interpret value as midi note.
+        { value: hap, context: { type: 'note' } };
   // if value is number => interpret as midi number as long as its not marked as frequency
   if (typeof value === 'object') {
     if (value.freq) {
@@ -140,15 +152,17 @@ export const getFrequency = (hap) => {
     return getFreq(value.note ?? value.n ?? value.value);
   }
   if (typeof value === 'number' && context.type !== 'frequency') {
-    value = midiToFreq(hap.value);
+    value = midiToFreq(value);
   } else if (typeof value === 'string' && isNote(value)) {
-    value = midiToFreq(noteToMidi(hap.value));
+    value = midiToFreq(noteToMidi(value));
   } else if (typeof value !== 'number') {
     throw new Error('not a note or frequency: ' + value);
   }
   return value;
 };
 
+export const getFreq = (hap) => getFrequency(hap);
+
 // rotate array by n steps (to the left)
 export const rotate = (arr, n) => arr.slice(n).concat(arr.slice(0, n));
 

packages/csound/index.mjs

@@ -23,7 +23,7 @@ export const csound = register('csound', (instrument, pat) => {
   instrument = instrument || 'triangle';
   init(); // not async to support csound inside other patterns + to be able to call pattern methods after it
   // TODO: find a alternative way to wait for csound to load (to wait with first time playback)
-  return pat.onTrigger((hap, currentTime, _cps, targetTime) => {
+  return pat.onSchedule((hap, targetTime) => {
     if (!_csound) {
       logger('[csound] not loaded yet', 'warning');
       return;
@@ -36,9 +36,10 @@ export const csound = register('csound', (instrument, pat) => {
     const controls = Object.entries({ ...hap.value, freq })
       .flat()
       .join('/');
+
     // TODO: find out how to send a precise ctx based time
     // http://www.csounds.com/manual/html/i.html
-    const timeOffset = targetTime - currentTime; // latency ?
+    const timeOffset = targetTime - getAudioContext().currentTime; // latency ?
     //const timeOffset = time_deprecate - getAudioContext().currentTime
     const params = [
       `"${instrument}"`, // p1: instrument name
@@ -144,7 +145,7 @@ export const csoundm = register('csoundm', (instrument, pat) => {
     p1 = `"${instrument}"`;
   }
   init(); // not async to support csound inside other patterns + to be able to call pattern methods after it
-  return pat.onTrigger((hap, currentTime, _cps, targetTime) => {
+  return pat.onSchedule((hap, targetTime) => {
     if (!_csound) {
       logger('[csound] not loaded yet', 'warning');
       return;
@@ -152,6 +153,7 @@ export const csoundm = register('csoundm', (instrument, pat) => {
     if (typeof hap.value !== 'object') {
       throw new Error('csound only support objects as hap values');
     }
+    const currentTime = getAudioContext().currentTime;
     // Time in seconds counting from now.
     const p2 = targetTime - currentTime;
     const p3 = hap.duration.valueOf() + 0;

packages/desktopbridge/midibridge.mjs

@@ -1,3 +1,4 @@
+import { getAudioContext } from '@strudel/webaudio/index.mjs';
 import { Invoke } from './utils.mjs';
 import { Pattern, getEventOffsetMs, noteToMidi } from '@strudel/core';
 
@@ -6,7 +7,8 @@ const OFF_MESSAGE = 0x80;
 const CC_MESSAGE = 0xb0;
 
 Pattern.prototype.midi = function (output) {
-  return this.onTrigger((hap, currentTime, cps, targetTime) => {
+  return this.onSchedule((hap, targetTime, cps) => {
+    const currentTime = getAudioContext().currentTime;
     let { note, nrpnn, nrpv, ccn, ccv, velocity = 0.9, gain = 1 } = hap.value;
     //magic number to get audio engine to line up, can probably be calculated somehow
     const latencyMs = 34;

packages/desktopbridge/oscbridge.mjs

@@ -1,12 +1,14 @@
 import { Pattern, ClockCollator } from '@strudel/core';
-import { parseControlsFromHap } from 'node_modules/@strudel/osc/osc.mjs';
+import { parseControlsFromHap } from '@strudel/osc/osc.mjs';
 import { Invoke } from './utils.mjs';
+import { getAudioContext } from '@strudel/webaudio/index.mjs';
 
 const collator = new ClockCollator({});
 
-export async function oscTriggerTauri(hap, currentTime, cps = 1, targetTime) {
+export async function tauriOscOutput(hap, targetTime, cps = 1) {
   const controls = parseControlsFromHap(hap, cps);
   const params = [];
+  const currentTime = getAudioContext().currentTime;
   const timestamp = collator.calculateTimestamp(currentTime, targetTime);
 
   Object.keys(controls).forEach((key) => {
@@ -32,5 +34,5 @@ export async function oscTriggerTauri(hap, currentTime, cps = 1, targetTime) {
   });
 }
 Pattern.prototype.osc = function () {
-  return this.onTrigger(oscTriggerTauri);
+  return this.onSchedule(tauriOscOutput);
 };

packages/desktopbridge/package.json

@@ -23,6 +23,7 @@
   },
   "dependencies": {
     "@strudel/core": "workspace:*",
+    "@strudel/webaudio": "workspace:*",
     "@tauri-apps/api": "^2.2.0"
   },
   "homepage": "https://codeberg.org/uzu/strudel#readme",

packages/dough/dough.mjs

@@ -37,7 +37,7 @@ export function initDough() {
   return D.ready;
 }
 
-export async function doughTrigger(hap, _currentTime, cps = 1, targetTime) {
+export async function doughOutput(hap, targetTime, cps = 1) {
   const offset = D.context_offset?.[0];
   if (!offset) {
     return; // not ready
@@ -71,5 +71,5 @@ export async function doughTrigger(hap, _currentTime, cps = 1, targetTime) {
 export const dough = register('dough', (pat) => {
   initDough();
   ensureMinimalOutput();
-  return pat.onTrigger(doughTrigger);
+  return pat.onSchedule(doughOutput);
 });

packages/midi/midi.mjs

@@ -13,7 +13,7 @@ import {
   getIsStarted,
   getPattern,
   getTime,
-  getTriggerFunc,
+  getScheduleFunc,
   isPattern,
   logger,
   ref,
@@ -21,7 +21,7 @@ import {
 } from '@strudel/core';
 import { noteToMidi, getControlName } from '@strudel/core';
 import { Note } from 'webmidi';
-import { getAudioContext } from '@strudel/webaudio';
+import { getAudioContext, getClockBridge } from '@strudel/webaudio';
 import { scheduleAtTime, ensureMinimalOutput } from '../superdough/helpers.mjs';
 import { getMidiDeviceNamesString, getDevice } from './util.mjs';
 import { MidiInput } from './input.mjs';
@@ -177,7 +177,11 @@ const isFirefox = navigator?.userAgent?.includes('Firefox');
 // firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=2062997
 function timedSend(timeMs, fn) {
   if (isFirefox) {
-    const audioTime = getAudioContext().currentTime + (timeMs - performance.now()) / 1000;
+    const audioTime = getClockBridge().getAudioContextTime(timeMs);
+    if (!audioTime) {
+      logger('[midi]: skip event, not ready');
+      return;
+    }
     scheduleAtTime(() => fn(undefined), audioTime);
   } else {
     fn(timeMs);
@@ -281,11 +285,6 @@ function sendNote(note, velocity, duration, device, midichan, timeMs) {
   timedSend(timeMs + duration, (timeMs) => device.sendNoteOff(midiNote, { channels: midichan, time: timeMs }));
 }
 
-// thanks freya https://youtu.be/LSNQuFEDOyQ?si=ukZI2IGgWV_NDZzP&t=2979
-function expDecay(a, b, decay, dt) {
-  return b + (a - b) * Math.exp(-decay * dt);
-}
-
 /**
  * MIDI output: Opens a MIDI output port.
  * @tags external_io
@@ -343,26 +342,16 @@ Pattern.prototype.midi = function (midiport, options = {}) {
 
   ensureMinimalOutput();
 
-  let p; // filtered clock offset
+  return this.sortHapsByPart().onSchedule((hap, targetTime, cps) => {
-  let lastTime;
-
-  return this.sortHapsByPart().onTrigger((hap, _currentTime, cps, targetTime) => {
     if (!WebMidi.enabled) {
       logger('Midi not enabled');
       return;
     }
-    const { contextTime, performanceTime } = getAudioContext().getOutputTimestamp();
+    const timeMs = getClockBridge().getPerformanceTime(targetTime);
-    if (!contextTime || !performanceTime) {
+    if (!timeMs) {
-      logger('[midi] skip midi event: not ready yet?');
+      logger('[midi] clockbridge not ready');
       return;
     }
-    // time conversion from audio context time (targetTime) to performance time (what midi needs)
-    const offset = performanceTime - contextTime * 1000; // clock offset in ms
-    const dt = performanceTime - (lastTime ?? performanceTime); // delta time since last midi hap
-    const decay = 1 / 10000; // how fast offset changes have an effect
-    p = expDecay(p ?? offset, offset, decay, dt); // smooth clock offset
-    lastTime = performanceTime;
-    const timeMs = targetTime * 1000 + p; // this is now correct in performance time
 
     hap.ensureObjectValue();
 
@@ -581,8 +570,8 @@ const kListeners = {};
 
 function _triggerKeyboard(input, cps, now, latencyCycles) {
   const pattern = getPattern();
-  const trigger = getTriggerFunc();
+  const schedule = getScheduleFunc();
-  if (!pattern || !trigger) {
+  if (!pattern || !schedule) {
     return false;
   }
   const t = now + latencyCycles;
@@ -599,8 +588,7 @@ function _triggerKeyboard(input, cps, now, latencyCycles) {
       return;
     }
     const t = ctxNow + (hap.whole.begin - now) / cps;
-    const duration = hap.duration / cps;
+    schedule(hap, t, cps);
-    trigger(hap, t - ctxNow, duration, cps, t);
   });
 
   return true;
@@ -635,7 +623,7 @@ export async function midikeys(input) {
     noteoff ||= noteon && velocity === 0; // handle devices which may use velocity = 0 to signal noteoff
     const key = `${input}_${note}`;
     const cps = getCps() ?? 0.5;
-    const triggerAvailable = !!(getPattern() && getTriggerFunc());
+    const triggerAvailable = !!(getPattern() && getScheduleFunc());
     const latencySeconds = triggerAvailable ? 0.01 : 0.06; // avoid missing notes due to cyclist / trigger latency
     const now = getTime();
     const t = now + latencySeconds * cps;

packages/mini/test/mini.test.mjs

@@ -84,6 +84,22 @@ describe('mini', () => {
   it('supports patterning euclidean rhythms', () => {
     expect(minS('[a(<3 5>, <8 16>)]*2')).toEqual(minS('a(3,8) a(5,16)'));
   });
+  it('supports inverted euclidean rhythms', () => {
+    expect(minS('a(-3, 8)')).toEqual(['a: 1/8 - 1/4', 'a: 1/4 - 3/8', 'a: 1/2 - 5/8', 'a: 5/8 - 3/4', 'a: 7/8 - 1']);
+  });
+  it('supports euclidean legato rhythms', () => {
+    expect(minS('a(3, -8)')).toEqual(['a: 0 - 3/8', 'a: 3/8 - 3/4', 'a: 3/4 - 1']);
+  });
+  it('supports inverted euclidean legato rhythms', () => {
+    expect(minS('a(-3, -8)')).toEqual([
+      'a: -1/8 - 1/8',
+      'a: 1/8 - 1/4',
+      'a: 1/4 - 1/2',
+      'a: 1/2 - 5/8',
+      'a: 5/8 - 7/8',
+      'a: 7/8 - 9/8',
+    ]);
+  });
   it("reproduces Toussaint's example euclidean algorithms", () => {
     const checkEuclid = function (spec, target) {
       expect(minS(`x(${spec[0]},${spec[1]})`)).toEqual(minS(target));
@@ -118,6 +134,40 @@ describe('mini', () => {
     checkEuclid([11, 24], 'x ~ ~ x ~ x ~ x ~ x ~ x ~ ~ x ~ x ~ x ~ x ~ x ~');
     checkEuclid([13, 24], 'x ~ x x ~ x ~ x ~ x ~ x ~ x x ~ x ~ x ~ x ~ x ~');
   });
+  it("reproduces Toussaint's example euclidean legato algorithms", () => {
+    const checkEuclid = function (spec, target) {
+      expect(minS(`x(${spec[0]},${spec[1]})`)).toEqual(minS(target));
+    };
+    checkEuclid([1, -2], 'x _');
+    checkEuclid([1, -3], 'x _ _');
+    checkEuclid([1, -4], 'x _ _ _');
+    checkEuclid([4, -12], 'x _ _ x _ _ x _ _ x _ _');
+    checkEuclid([2, -5], 'x _ x _ _');
+    // checkEuclid([3, 4], "x _ x x"); // Toussaint is wrong..
+    checkEuclid([3, -4], 'x x x _'); // correction
+    checkEuclid([3, -5], 'x _ x _ x');
+    checkEuclid([3, -7], 'x _ x _ x _ _');
+    checkEuclid([3, -8], 'x _ _ x _ _ x _');
+    checkEuclid([4, -7], 'x _ x _ x _ x');
+    checkEuclid([4, -9], 'x _ x _ x _ x _ _');
+    checkEuclid([4, -11], 'x _ _ x _ _ x _ _ x _');
+    // checkEuclid([5, 6], "x _ x x x x"); // Toussaint is wrong..
+    checkEuclid([5, -6], 'x x x x x _'); // correction
+    checkEuclid([5, -7], 'x _ x x _ x x');
+    checkEuclid([5, -8], 'x _ x x _ x x _');
+    checkEuclid([5, -9], 'x _ x _ x _ x _ x');
+    checkEuclid([5, -11], 'x _ x _ x _ x _ x _ _');
+    checkEuclid([5, -12], 'x _ _ x _ x _ _ x _ x _');
+    // checkEuclid([5, 16], "x _ _ x _ _ x _ _ x _ _ x _ _ _ _");  // Toussaint is wrong..
+    checkEuclid([5, -16], 'x _ _ x _ _ x _ _ x _ _ x _ _ _'); // correction
+    // checkEuclid([7, 8], "x _ x x x x x x"); // Toussaint is wrong..
+    checkEuclid([7, -8], 'x x x x x x x _'); // Correction
+    checkEuclid([7, -12], 'x _ x x _ x _ x x _ x _');
+    checkEuclid([7, -16], 'x _ _ x _ x _ x _ _ x _ x _ x _');
+    checkEuclid([9, -16], 'x _ x x _ x _ x _ x x _ x _ x _');
+    checkEuclid([11, -24], 'x _ _ x _ x _ x _ x _ x _ _ x _ x _ x _ x _ x _');
+    checkEuclid([13, -24], 'x _ x x _ x _ x _ x _ x _ x x _ x _ x _ x _ x _');
+  });
   it('supports the - alias for ~', () => {
     expect(minS('a - b [- c]')).toEqual(minS('a ~ b [~ c]'));
   });

packages/mondough/mondough.mjs

@@ -46,7 +46,6 @@ lib[':'] = tail;
 lib['..'] = range;
 lib['def'] = () => silence;
 lib['or'] = (...children) => chooseIn(...children); // always has structure but is cyclewise.. e.g. "s oh*8.dec[.04 | .5]"
-//lib['or'] = (...children) => chooseOut(...children); // "s oh*8.dec[.04 | .5]" is better but "dec[.04 | .5].s oh*8" has no struct
 
 function evaluator(node, scope) {
   const { type } = node;

packages/mqtt/mqtt.mjs

@@ -4,7 +4,7 @@ Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { Pattern, isPattern, createParams } from '@strudel/core';
+import { Pattern, getClockTime, createParams } from '@strudel/core';
 import Paho from 'paho-mqtt';
 
 const connections = {};
@@ -80,42 +80,39 @@ Pattern.prototype.mqtt = function (
     }
     cx.connect(props);
   }
-  return this.withHap((hap) => {
+  return this.onSchedule((hap, targetTime, cps) => {
-    const onTrigger = (hap, currentTime, cps, targetTime) => {
+    let msg_topic = topic;
-      let msg_topic = topic;
+    if (!cx || !cx.isConnected()) {
-      if (!cx || !cx.isConnected()) {
+      return;
-        return;
+    }
-      }
+    let message = '';
-      let message = '';
+    if (typeof hap.value === 'object') {
-      if (typeof hap.value === 'object') {
+      let value = hap.value;
-        let value = hap.value;
 
-        // Try to take topic from pattern if it's not set
+      // Try to take topic from pattern if it's not set
-        if (typeof msg_topic === 'undefined' && 'topic' in value) {
+      if (typeof msg_topic === 'undefined' && 'topic' in value) {
-          msg_topic = value.topic;
+        msg_topic = value.topic;
-          if (Array.isArray(msg_topic)) {
+        if (Array.isArray(msg_topic)) {
-            msg_topic = msg_topic.join('/');
+          msg_topic = msg_topic.join('/');
-          }
-          msg_topic = '/' + msg_topic;
         }
-        if (add_meta) {
+        msg_topic = '/' + msg_topic;
-          const duration = hap.duration.div(cps);
-          value = { ...value, duration: duration.valueOf(), cps: cps };
-        }
-        message = JSON.stringify(value);
-      } else {
-        message = hap.value;
       }
-      message = new Paho.Message(message);
+      if (add_meta) {
-      message.destinationName = msg_topic;
+        const duration = hap.duration.div(cps);
+        value = { ...value, duration: duration.valueOf(), cps: cps };
+      }
+      message = JSON.stringify(value);
+    } else {
+      message = hap.value;
+    }
+    message = new Paho.Message(message);
+    message.destinationName = msg_topic;
 
-      const offset = (targetTime - currentTime + latency) * 1000;
+    const offset = (targetTime - getClockTime() + latency) * 1000;
 
-      window.setTimeout(function () {
+    window.setTimeout(function () {
-        cx.send(message);
+      cx.send(message);
-      }, offset);
+    }, offset);
-    };
-    return hap.setContext({ ...hap.context, onTrigger, dominantTrigger: true });
   });
 };
 

packages/osc/osc.mjs

@@ -4,7 +4,8 @@ Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { logger, parseNumeral, register, isNote, noteToMidi, ClockCollator } from '@strudel/core';
+import { logger, parseNumeral, register, isNote, noteToMidi } from '@strudel/core';
+import { ensureMinimalOutput, getClockBridge } from '@strudel/webaudio';
 
 let connection; // Promise<OSC>
 function connect() {
@@ -54,13 +55,18 @@ export function parseControlsFromHap(hap, cps) {
   return controls;
 }
 
-const collator = new ClockCollator({});
+export async function oscOutput(hap, targetTime, cps = 1) {
-
-export async function oscTrigger(hap, currentTime, cps = 1, targetTime) {
   const ws = await connect();
+
+  const timeMs = getClockBridge().getPerformanceTime(targetTime);
+  if (!timeMs) {
+    logger('[osc] clockbridge not ready');
+    return;
+  }
+  const ts = performance.timeOrigin + timeMs;
+
   const controls = parseControlsFromHap(hap, cps);
   const keyvals = Object.entries(controls).flat();
-  const ts = collator.calculateTimestamp(currentTime, targetTime) * 1000;
   const msg = { address: '/dirt/play', args: keyvals, timestamp: ts };
 
   if ('oschost' in hap.value) {
@@ -82,4 +88,7 @@ export async function oscTrigger(hap, currentTime, cps = 1, targetTime) {
  * @memberof Pattern
  * @returns Pattern
  */
-export const osc = register('osc', (pat) => pat.onTrigger(oscTrigger));
+export const osc = register('osc', (pat) => {
+  ensureMinimalOutput();
+  return pat.onSchedule(oscOutput);
+});

packages/osc/package.json

@@ -38,6 +38,7 @@
   "homepage": "https://codeberg.org/uzu/strudel#readme",
   "dependencies": {
     "@strudel/core": "workspace:*",
+    "@strudel/webaudio": "workspace:*",
     "osc": "^2.4.5",
     "ws": "^8.18.3"
   },

packages/osc/superdirtoutput.js

@@ -1,10 +1,7 @@
-/* import { oscTriggerTauri } from '../desktopbridge/oscbridge.mjs';
+/* import { tauriOscOutput } from '../desktopbridge/oscbridge.mjs';
 import { isTauri } from '../desktopbridge/utils.mjs'; */
-import { oscTrigger } from './osc.mjs';
+import { oscOutput } from './osc.mjs';
 
-const trigger = /* isTauri() ? oscTriggerTauri : */ oscTrigger;
+const output = /* isTauri() ? tauriOscOutput : */ oscOutput;
 
-export const superdirtOutput = (hap, deadline, hapDuration, cps, targetTime) => {
+export const superdirtOutput = (hap, targetTime, cps) => output(hap, targetTime, cps);
-  const currentTime = performance.now() / 1000;
-  return trigger(hap, currentTime, cps, targetTime);
-};

packages/repl/repl-component.mjs

@@ -37,7 +37,7 @@ if (typeof HTMLElement !== 'undefined') {
       const drawContext = getDrawContext();
       const drawTime = [-2, 2];
       this.editor = new StrudelMirror({
-        defaultOutput: webaudioOutput,
+        onSchedule: webaudioOutput,
         getTime: () => getAudioContext().currentTime,
         transpiler,
         root: container,

packages/serial/serial.mjs

@@ -4,7 +4,7 @@ Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { Pattern, isPattern } from '@strudel/core';
+import { Pattern, getClockTime } from '@strudel/core';
 
 var writeMessagers = {};
 var choosing = false;
@@ -64,53 +64,50 @@ function crc16(data) {
 }
 
 Pattern.prototype.serial = function (br = 115200, sendcrc = false, singlecharids = false, name = 'default') {
-  return this.withHap((hap) => {
+  if (!(name in writeMessagers)) {
-    if (!(name in writeMessagers)) {
+    getWriter(name, br);
-      getWriter(name, br);
+  }
-    }
+  return this.onSchedule((hap, targetTime) => {
-    const onTrigger = (hap, currentTime, _cps, targetTime) => {
+    var message = '';
-      var message = '';
+    var chk = 0;
-      var chk = 0;
+    if (typeof hap.value === 'object') {
-      if (typeof hap.value === 'object') {
+      if ('action' in hap.value) {
-        if ('action' in hap.value) {
+        var action = hap.value['action'];
-          var action = hap.value['action'];
+        if (singlecharids) {
+          action = action.charAt(0);
+        }
+        message += action + '(';
+        var first = true;
+        for (var [key, val] of Object.entries(hap.value)) {
+          if (key === 'action') {
+            continue;
+          }
+          if (first) {
+            first = false;
+          } else {
+            message += ',';
+          }
           if (singlecharids) {
-            action = action.charAt(0);
+            key = key.charAt(0);
-          }
-          message += action + '(';
-          var first = true;
-          for (var [key, val] of Object.entries(hap.value)) {
-            if (key === 'action') {
-              continue;
-            }
-            if (first) {
-              first = false;
-            } else {
-              message += ',';
-            }
-            if (singlecharids) {
-              key = key.charAt(0);
-            }
-            message += key + ':' + val;
-          }
-          message += ')';
-          if (sendcrc) {
-            chk = crc16(message);
-          }
-        } else {
-          for (const [key, val] of Object.entries(hap.value)) {
-            message += `${key}:${val}`;
           }
+          message += key + ':' + val;
+        }
+        message += ')';
+        if (sendcrc) {
+          chk = crc16(message);
         }
       } else {
-        message = hap.value;
+        for (const [key, val] of Object.entries(hap.value)) {
+          message += `${key}:${val}`;
+        }
       }
-      const offset = (targetTime - currentTime + latency) * 1000;
+    } else {
+      message = hap.value;
+    }
+    const offset = (targetTime - getClockTime() + latency) * 1000;
 
-      window.setTimeout(function () {
+    window.setTimeout(function () {
-        writeMessagers[name](message, chk);
+      writeMessagers[name](message, chk);
-      }, offset);
+    }, offset);
-    };
-    return hap.setContext({ ...hap.context, onTrigger, dominantTrigger: true });
   });
 };

packages/soundfonts/gm.mjs

@@ -479,7 +479,7 @@ export default {
   gm_electric_bass_finger: [
     // Electric Bass (finger): Bass
     '0330_JCLive_sf2_file',
-    '0330_FluidR3_GM_sf2_fible',
+    '0330_FluidR3_GM_sf2_file',
     '0330_Aspirin_sf2_file',
     //0330_Chaos_sf2_file // same as last
     '0330_GeneralUserGS_sf2_file',
@@ -527,7 +527,7 @@ export default {
     '0370_Aspirin_sf2_file',
     // 0370_Chaos_sf2_file // same as last
     '0370_FluidR3_GM_sf2_file',
-    '0370_GeneralUserGS_sf2_fil e',
+    '0370_GeneralUserGS_sf2_file',
     '0370_JCLive_sf2_file',
     //0370_SBLive_sf2
     //0370_SoundBlasterOld_sf2
@@ -1782,6 +1782,5 @@ export default {
     '1272_GeneralUserGS_sf2_file',
     '1273_GeneralUserGS_sf2_file',
     '1274_GeneralUserGS_sf2_file',
-    '',
   ],
 };

packages/soundfonts/sfumato.mjs

@@ -3,7 +3,7 @@ import { getAudioContext, registerSound } from '@strudel/webaudio';
 import { loadSoundfont as _loadSoundfont, startPresetNote } from 'sfumato';
 
 Pattern.prototype.soundfont = function (sf, n = 0) {
-  return this.onTrigger((h, ct, cps, targetTime) => {
+  return this.onSchedule((h, targetTime) => {
     const ctx = getAudioContext();
     const note = getPlayableNoteValue(h);
     const preset = sf.presets[n % sf.presets.length];

packages/superdough/audioContext.mjs

@@ -8,8 +8,9 @@ This program is free software: you can redistribute it and/or modify it under th
 */
 
 import { clearNodePool } from './nodePools.mjs';
+import { ClockBridge } from './clockbridge.mjs';
 
-let audioContext;
+let audioContext, clockBridge;
 
 export const setDefaultAudioContext = () => {
   return setAudioContext(new AudioContext());
@@ -23,6 +24,7 @@ export const setAudioContext = (context) => {
     audioContext.close();
   }
   audioContext = context;
+  clockBridge = new ClockBridge(audioContext);
   return audioContext;
 };
 
@@ -34,6 +36,13 @@ export const getAudioContext = () => {
   return audioContext;
 };
 
+export function getClockBridge() {
+  if (!clockBridge) {
+    getAudioContext(); // creates clockBridge
+  }
+  return clockBridge;
+}
+
 export function getAudioContextCurrentTime() {
   return getAudioContext().currentTime;
 }

packages/superdough/clockbridge.mjs

@@ -0,0 +1,41 @@
+/*
+clockbridge.mjs
+Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/src/branch/main/packages/superdough/index.mjs>
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+// thanks freya https://youtu.be/LSNQuFEDOyQ?si=ukZI2IGgWV_NDZzP&t=2979
+export function expDecay(a, b, decay, dt) {
+  return b + (a - b) * Math.exp(-decay * dt);
+}
+
+// translates between audio and performance clock
+export class ClockBridge {
+  p; // smoothed clock offset
+  lastTime;
+  audioContext;
+  constructor(audioContext) {
+    this.audioContext = audioContext;
+  }
+  // delta between audio and performance time in ms
+  getOffset() {
+    const { contextTime, performanceTime } = this.audioContext.getOutputTimestamp();
+    if (!contextTime || !performanceTime) {
+      return;
+    }
+    const offset = performanceTime - contextTime * 1000; // clock offset in ms
+    const dt = performanceTime - (this.lastTime ?? performanceTime); // delta time since last hap
+    const decay = 1 / 10000; // how fast offset changes have an effect
+    this.p = expDecay(this.p ?? offset, offset, decay, dt); // smooth clock offset
+    this.lastTime = performanceTime;
+    return this.p;
+  }
+  getPerformanceTime(audioContextTime) {
+    const offset = this.getOffset();
+    return audioContextTime * 1000 + offset; // this is now correct in performance time (ms)
+  }
+  getAudioContextTime(performanceTime) {
+    const offset = this.getOffset();
+    return (performanceTime - offset) / 1000; // this is now correct in audio context time (seconds)
+  }
+}

packages/superdough/dspworklet.mjs

@@ -74,6 +74,7 @@ export const rawdsp = async (code) => {
   worklet.node.connect(ac.destination);
 };
 
-export function rawdspTrigger(hap, currentTime, cps, targetTime) {
+export function rawdspOutput(hap, time, cps) {
-  window.postMessage({ time: targetTime, dough: hap.value, currentTime, duration: hap.duration, cps });
+  const currentTime = getAudioContext().currentTime;
+  window.postMessage({ time, dough: hap.value, currentTime, duration: hap.duration, cps });
 }

packages/superdough/index.mjs

@@ -14,3 +14,4 @@ export * from './modulators.mjs';
 export * from './dspworklet.mjs';
 export * from './audioContext.mjs';
 export * from './wavetable.mjs';
+export * from './clockbridge.mjs';

packages/superdough/sampler.mjs

@@ -36,8 +36,9 @@ function humanFileSize(bytes, si) {
  *
  * Note: `must` be called with await, otherwise you'll get a pending Promise object.
  *
- * @name getDuration,getDur
+ * @name getDuration
- * @tag samples
+ * @synonym getDur
+ * @tags samples
  * @param {string} sampleName
  * @param {number} (optional) n
  *

packages/superdough/superdough.mjs

@@ -1048,7 +1048,3 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
     }
   });
 };
-
-export const superdoughTrigger = (t, hap, ct, cps) => {
-  superdough(hap, t - ct, hap.duration / cps, cps);
-};

packages/web/web.mjs

@@ -6,7 +6,7 @@ export * from '@strudel/mini';
 export * from '@strudel/edo';
 export * from '@strudel/tonal';
 export * from '@strudel/webaudio';
-import { Pattern, evalScope, setTime } from '@strudel/core';
+import { Pattern, evalScope, setTime, setClockTime } from '@strudel/core';
 import { initAudioOnFirstClick, registerSynthSounds, webaudioRepl } from '@strudel/webaudio';
 // import { registerSoundfonts } from '@strudel/soundfonts';
 import { evaluate as _evaluate, transpiler } from '@strudel/transpiler';
@@ -41,6 +41,7 @@ export function initStrudel(options = {}) {
     return repl;
   })();
   setTime(() => repl.scheduler.now());
+  setClockTime(() => repl.scheduler.getTime()); // TODO: refactor?
   return initDone;
 }
 

packages/webaudio/README.md

@@ -19,7 +19,7 @@ initAudioOnFirstClick();
 const ctx = getAudioContext();
 
 const { scheduler } = repl({
-  defaultOutput: webaudioOutput,
+  onSchedule: webaudioOutput,
   getTime: () => ctx.currentTime
 });
 

packages/webaudio/supradough.mjs

@@ -20,7 +20,7 @@ const soundMap = new Map();
 const loadedSounds = new Map();
 
 Pattern.prototype.supradough = function () {
-  return this.onTrigger((hap, __, cps, begin) => {
+  return this.onSchedule((hap, begin, cps) => {
     hap.value._begin = begin;
     hap.value._duration = hap.duration / cps;
     !doughWorklet && initDoughWorklet();

packages/webaudio/webaudio.mjs

@@ -9,7 +9,7 @@ import {
   superdough,
   getAudioContext,
   setLogger,
-  rawdspTrigger,
+  rawdspOutput,
   registerWorklet,
   setAudioContext,
   initAudio,
@@ -32,8 +32,8 @@ const hap2value = (hap) => {
 };
 
 // uses more precise, absolute t if available, see https://github.com/tidalcycles/strudel/pull/1004
-// TODO: refactor output callbacks to eliminate deadline
+export const webaudioOutput = (hap, t, cps) => {
-export const webaudioOutput = (hap, _deadline, hapDuration, cps, t) => {
+  const hapDuration = hap.duration / cps;
   return superdough(hap2value(hap), t, hapDuration, cps, hap.whole?.begin.valueOf());
 };
 
@@ -167,14 +167,14 @@ export function webaudioRepl(options = {}) {
   setAudioContext(audioContext);
   options = {
     getTime: () => audioContext.currentTime,
-    defaultOutput: webaudioOutput,
+    onSchedule: webaudioOutput,
     ...options,
   };
   return repl(options);
 }
 
 Pattern.prototype.rawdsp = function () {
-  return this.onTrigger(rawdspTrigger, 1);
+  return this.onSchedule(rawdspOutput, 1);
 };
 
 function audioBufferToWav(buffer, opt) {

packages/xen/tune.mjs

@@ -8,11 +8,14 @@ import Tune from './tunejs.js';
 import { register } from '@strudel/core';
 
 /**
+ * Deprecated.
+ *
  * Assumes pattern contains numerical scale degrees on the `i` control (see examples below). Accepts a scale name or list of frequencies (see all available names at the link on the reference). Returns a new pattern with all values mapped to a frequency ratio. Similar to `xen`.
  * @name tune
  * @returns Pattern
  * @memberof Pattern
  * @param {(string | number[] )} scale
+ * @deprecated
  * @example
  * i("0 1 2 3 4 5").tune("hexany15").mul("220").freq()
  * @example

packages/xen/xen.mjs

@@ -4,7 +4,7 @@ Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { register, _mod, parseNumeral, removeUndefineds } from '@strudel/core';
+import { register, _mod, parseNumeral, removeUndefineds, Pattern, parray, State } from '@strudel/core';
 import Tune from './tunejs.js';
 
 // returns a list of frequency ratios for given edo scale
@@ -61,14 +61,8 @@ function xenOffset(xenScale, offset, index = 0) {
 
 const trimFreq = (freq) => parseFloat(freq.toPrecision(10));
 
-// accepts a scale name such as 31edo, and a pattern
-// pattern expected to follow format such that a value can be mapped
-// to an edostep within the scale. Returns the pattern with
-// values mapped to the frequencies associated with the given edosteps
-// scaleNameOrRatios: string || number[], steps?: number
-
 /**
- * Assumes a numerical pattern of scale steps, and a scale. Scales accepted are all preset scale names of `tune`, arbitrary edos such as 31edo, or an array of frequency ratios. Assumes scales repeat at octave (2/1). Returns a new pattern with all values mapped to their associated frequency, assuming a base frequency of 220hz.
+ * Assumes a numerical pattern of scale steps, and a scale. Scales accepted are all preset scale names of `tune`, arbitrary edos such as 31edo, or an array of frequency ratios. Assumes scales repeat at octave (2/1). Returns a new pattern with all values mapped to their associated frequency, assuming a base frequency of 220hz. See first 4 examples for the different ways you can input a scale into `xen`
  *
  * @name xen
  * @returns Pattern
@@ -87,6 +81,15 @@ const trimFreq = (freq) => parseFloat(freq.toPrecision(10));
  *   Math.pow(2, 18/31),
  * ]).piano()
  * @example
+ * // However, with the above you won't get highlighting of the scale indices,
+ * // instead you could do something like:
+ * i("[<2 ->, 0 1 <- 2> 3]*2").xen([
+ *   "1:1", // tonic
+ *   "5:4", // Major 3rd
+ *   "[3:2 4:3]", // Perfect 5th, 4th
+ *   "5:3" // Major 6th
+ * ]).s("tri")
+ * @example
  * // xen also supports all scale names that
  * // tune does:
  * i("0 1 2 3 4 5").xen("hexany15")
@@ -96,27 +99,100 @@ const trimFreq = (freq) => parseFloat(freq.toPrecision(10));
  * i("0 1 2 3 4 5 6 7").xen("<5edo 10edo 15edo hexany15>")
  */
 
-export const xen = register('xen', function (scaleNameOrRatios, pat) {
+export const xen = register(
-  return pat.withHaps((haps) => {
+  'xen',
-    haps = haps.map((hap) => {
+  function (scaleNameOrRatios, pat) {
-      let hVal = hap.value;
+    const JIsc2 = (input) => {
-      const isObject = typeof hVal === 'object';
+      let k = parray(input);
-      if (!isObject) {
+
-        throw new Error(`Expected hap to have control 'i' set, but received ${hap.value.i}, try wrapping input in i()`);
+      return new Pattern((state) => {
-      }
+        let res = k.withValue((x) => x.map((y) => eval(y.join('/')))).query(state);
-      const { i, ...otherValues } = hVal;
+        return res;
-      const scale = getXenScale(scaleNameOrRatios);
+      });
-      let freq = xenOffset(scale, parseNumeral(hVal.i));
+    };
-      // 10 is somewhat arbitrary
+
-      freq = trimFreq(freq);
+    const query = (state) => {
-      hap.value = { ...otherValues, freq };
+      let haps = pat.query(state);
-      return isEdo(scaleNameOrRatios)
+      let resHaps = [];
-        ? hap.setContext({ ...hap.context, edoSize: scaleNameOrRatios.match(/^([1-9]+[0-9]*)edo$/)[1] })
+
-        : hap;
+      haps.forEach((hap) => {
-    });
+        let hVal = hap.value;
-    return removeUndefineds(haps);
+        const isObject = typeof hVal === 'object';
-  });
+        if (!isObject) {
-});
+          throw new Error(
+            `Expected hap to have control 'i' set, but received ${hap.value.i}, try wrapping input in i()`,
+          );
+        }
+        const { i, ...otherValues } = hVal;
+        let edo = false;
+        let st = new State(hap.wholeOrPart().intersection(state.span), state.controls);
+
+        // Format: An array of values
+        // Each value is a pattern, representing an index on the scale
+        let sc = scaleNameOrRatios.query(st);
+        // Check to see if input is attempting to be a named scale or a raw scale
+        let isStr = typeof sc[0].value == 'string';
+        let isRawScale = Array.isArray(sc[0].value) && sc[0].value.every((x) => typeof x == 'number');
+        if (!isStr && !isRawScale) {
+          sc = sc[0].value;
+        } else if (isRawScale) {
+          sc = getXenScale(sc[0].value);
+        }
+
+        if (!isStr && !isRawScale) {
+          let scaleByIndices = [];
+          for (let j = 0; j < sc.length; j++) {
+            scaleByIndices[j] = sc[j].query(st);
+          }
+          /* 
+          Format: An array of 1 or more Haps, each Hap has an array of values of 
+            one or more scale index definitions (contains whole scale)
+          Assumption: inner value array should be same length between each
+          */
+          let sc2 = JIsc2(sc).query(st);
+
+          let index = _mod(i, sc.length);
+          for (let j = 0; j < scaleByIndices[index].length; j++) {
+            let scale = getXenScale(sc2[j].value);
+            let freq = xenOffset(scale, parseNumeral(i));
+            let newHap = hap;
+            freq = trimFreq(freq);
+            newHap.value = { ...otherValues, freq };
+            newHap = newHap.setContext(newHap.combineContext(scaleByIndices[index][j]));
+            resHaps.push(newHap);
+          }
+        } else if (isRawScale) {
+          let freq = xenOffset(sc, parseNumeral(i));
+          let newHap = hap;
+          freq = trimFreq(freq);
+          newHap.value = { ...otherValues, freq };
+          resHaps.push(newHap);
+        } else if (isStr) {
+          // scale is named scale(s)
+          for (let j = 0; j < sc.length; j++) {
+            let scaleName = sc[j].value;
+            let scale = getXenScale(scaleName);
+            let freq = xenOffset(scale, parseNumeral(i));
+            let newHap = hap;
+            freq = trimFreq(freq);
+            newHap.value = { ...otherValues, freq };
+            newHap = newHap.setContext(newHap.combineContext(sc[j]));
+            if (isEdo(scaleName)) {
+              edo = scaleName.match(/^([1-9]+[0-9]*)edo$/)[1];
+              newHap = newHap.setContext({ ...newHap.context, edoSize: edo });
+            }
+            resHaps.push(newHap);
+          }
+        } else {
+          throw new Error('failed to parse scale');
+        }
+      });
+      return resHaps;
+    };
+    return new Pattern(query);
+  },
+  false,
+);
 
 /**
  * Assumes pattern of frequencies tuned to some `base` frequency, such as the output of `xen`

pnpm-lock.yaml

@@ -299,6 +299,9 @@ importers:
       '@strudel/core':
         specifier: workspace:*
         version: link:../core
+      '@strudel/webaudio':
+        specifier: workspace:*
+        version: link:../webaudio
       '@tauri-apps/api':
         specifier: ^2.2.0
         version: 2.2.0
@@ -486,6 +489,9 @@ importers:
       '@strudel/core':
         specifier: workspace:*
         version: link:../core
+      '@strudel/webaudio':
+        specifier: workspace:*
+        version: link:../webaudio
       osc:
         specifier: ^2.4.5
         version: 2.4.5

test/__snapshots__/tunes.test.mjs.snap

@@ -7322,12 +7322,12 @@ exports[`renders tunes > tune: randomBells 1`] = `
 [
   "[ -9/8 ⇜ (0/1 → 3/8) | gain:0.6 note:A3 velocity:0.598990320228 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ -3/4 ⇜ (0/1 → 3/4) | gain:0.6 note:C5 velocity:0.836992966942 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 0/1 → 3/2 | note:F2 s:bass clip:1 gain:0.8 ]",
+  "[ 0/1 → 3/2 | note:D2 s:bass clip:1 gain:0.8 ]",
   "[ 0/1 → 9/4 | gain:0.6 note:D3 velocity:0.5 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 3/8 → 21/8 | gain:0.6 note:F5 velocity:0.921303892508 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 3/4 → 3/1 | gain:0.6 note:C5 velocity:0.842607785016 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 3/2 → 9/4 | note:F2 s:bass clip:1 gain:0.8 ]",
+  "[ 3/2 → 9/4 | note:D2 s:bass clip:1 gain:0.8 ]",
-  "[ 9/4 → 3/1 | note:F2 s:bass clip:1 gain:0.8 ]",
+  "[ 9/4 → 3/1 | note:D2 s:bass clip:1 gain:0.8 ]",
   "[ 9/4 → 9/2 | gain:0.6 note:D4 velocity:0.700696257874 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 21/8 → 39/8 | gain:0.6 note:C4 velocity:0.650794394314 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 3/1 → 9/2 | note:D2 s:bass clip:1 gain:0.8 ]",
@@ -7339,12 +7339,12 @@ exports[`renders tunes > tune: randomBells 1`] = `
   "[ (21/4 → 6/1) ⇝ 27/4 | gain:0.6 note:D4 velocity:0.698815540411 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 39/8 ⇜ (6/1 → 51/8) | gain:0.6 note:D5 velocity:0.875811336562 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 21/4 ⇜ (6/1 → 27/4) | gain:0.6 note:D4 velocity:0.698815540411 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 6/1 → 15/2 | note:D2 s:bass clip:1 gain:0.8 ]",
+  "[ 6/1 → 15/2 | note:A2 s:bass clip:1 gain:0.8 ]",
   "[ 6/1 → 33/4 | gain:0.6 note:G4 velocity:0.75977108255 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 51/8 → 69/8 | gain:0.6 note:G4 velocity:0.774316444062 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 27/4 → 9/1 | gain:0.6 note:C5 velocity:0.836244757287 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 15/2 → 33/4 | note:D2 s:bass clip:1 gain:0.8 ]",
+  "[ 15/2 → 33/4 | note:A2 s:bass clip:1 gain:0.8 ]",
-  "[ 33/4 → 9/1 | note:D2 s:bass clip:1 gain:0.8 ]",
+  "[ 33/4 → 9/1 | note:A2 s:bass clip:1 gain:0.8 ]",
   "[ 33/4 → 21/2 | gain:0.6 note:A3 velocity:0.59140187595 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 69/8 → 87/8 | gain:0.6 note:G4 velocity:0.754063542932 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 9/1 → 21/2 | note:A2 s:bass clip:1 gain:0.8 ]",
@@ -7356,12 +7356,12 @@ exports[`renders tunes > tune: randomBells 1`] = `
   "[ (45/4 → 12/1) ⇝ 51/4 | gain:0.6 note:A4 velocity:0.797278589569 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 87/8 ⇜ (12/1 → 99/8) | gain:0.6 note:F4 velocity:0.734787144698 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 45/4 ⇜ (12/1 → 51/4) | gain:0.6 note:A4 velocity:0.797278589569 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 12/1 → 27/2 | note:A2 s:bass clip:1 gain:0.8 ]",
+  "[ 12/1 → 27/2 | note:G2 s:bass clip:1 gain:0.8 ]",
   "[ 12/1 → 57/4 | gain:0.6 note:G5 velocity:0.979763559997 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 99/8 → 117/8 | gain:0.6 note:C4 velocity:0.666239210404 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 51/4 → 15/1 | gain:0.6 note:F5 velocity:0.95169514697 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 27/2 → 57/4 | note:A2 s:bass clip:1 gain:0.8 ]",
+  "[ 27/2 → 57/4 | note:G2 s:bass clip:1 gain:0.8 ]",
-  "[ 57/4 → 15/1 | note:A2 s:bass clip:1 gain:0.8 ]",
+  "[ 57/4 → 15/1 | note:G2 s:bass clip:1 gain:0.8 ]",
   "[ 57/4 → 33/2 | gain:0.6 note:F5 velocity:0.918253320269 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 117/8 → 135/8 | gain:0.6 note:G3 velocity:0.571157105267 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 15/1 → 33/2 | note:G2 s:bass clip:1 gain:0.8 ]",
@@ -7373,12 +7373,12 @@ exports[`renders tunes > tune: randomBells 1`] = `
   "[ (69/4 → 18/1) ⇝ 75/4 | gain:0.6 note:F3 velocity:0.508127085865 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 135/8 ⇜ (18/1 → 147/8) | gain:0.6 note:F5 velocity:0.945647025481 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 69/4 ⇜ (18/1 → 75/4) | gain:0.6 note:F3 velocity:0.508127085865 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 18/1 → 39/2 | note:G2 s:bass clip:1 gain:0.8 ]",
+  "[ 18/1 → 39/2 | note:F2 s:bass clip:1 gain:0.8 ]",
   "[ 18/1 → 81/4 | gain:0.6 note:A3 velocity:0.608644555323 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 147/8 → 165/8 | gain:0.6 note:F3 velocity:0.506259439513 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 75/4 → 21/1 | gain:0.6 note:D4 velocity:0.671621939167 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
-  "[ 39/2 → 81/4 | note:G2 s:bass clip:1 gain:0.8 ]",
+  "[ 39/2 → 81/4 | note:F2 s:bass clip:1 gain:0.8 ]",
-  "[ 81/4 → 21/1 | note:G2 s:bass clip:1 gain:0.8 ]",
+  "[ 81/4 → 21/1 | note:F2 s:bass clip:1 gain:0.8 ]",
   "[ 81/4 → 45/2 | gain:0.6 note:D4 velocity:0.704345900565 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 165/8 → 183/8 | gain:0.6 note:D5 velocity:0.887838857248 s:bell delay:0.2 delaytime:0.333333333333 delayfeedback:0.8 ]",
   "[ 21/1 → 45/2 | note:F2 s:bass clip:1 gain:0.8 ]",

website/src/docs/MiniRepl.jsx

@@ -22,7 +22,7 @@ export function MiniRepl({
   tunes,
   hideHeader = false,
   canvasHeight = 100,
-  onTrigger,
+  onSchedule,
   punchcard,
   punchcardLabels = true,
   claviature,
@@ -48,7 +48,7 @@ export function MiniRepl({
 
     const editor = new StrudelMirror({
       id,
-      defaultOutput: webaudioOutput,
+      onSchedule: webaudioOutput,
       getTime: () => getAudioContext().currentTime,
       transpiler,
       autodraw,
@@ -58,8 +58,8 @@ export function MiniRepl({
       drawTime,
       drawContext,
       editPattern: (pat, id) => {
-        if (onTrigger) {
+        if (onSchedule) {
-          pat = pat.onTrigger(onTrigger, false);
+          pat = pat.onSchedule(onSchedule, false);
         }
         if (claviature) {
           pat = pat.onPaint((ctx, time, haps, drawTime) => {

website/src/layouts/MainLayout.astro

@@ -36,7 +36,7 @@ const githubEditUrl = `${CONFIG.GITHUB_EDIT_URL}/${currentFile}`;
         <Header currentPage={currentPage} />
       </header>
       <main class="relative pt-16">
-        <div class="h-full top-0 overflow-auto min-w-[300px] flex xl:justify-center pr-4 pl-4 md:pl-[300px] xl:pl-0">
+        <div class="h-full top-0 overflow-auto min-w-[300px] flex xl:justify-center pr-4 pl-4 md:pl-[300px] xl:pr-[300px]">
           <aside title="Site Navigation" class="w-[300px] px-6 left-0 hidden md:block fixed h-full">
             <LeftSidebar currentPage={currentPage} />
           </aside>

website/src/pages/learn/effects.mdx

@@ -33,7 +33,7 @@ The signal chain in Strudel is as follows:
     - This is where the main (volume) ADSR happens
   - A lowpass filter (`lpf`)
   - A highpass filter (`hpf`)
-  - A bandpass filter (`bandpass`)
+  - A bandpass filter (`bpf`)
   - A vowel filter (`vowel`)
   - Sample rate reduction (`coarse`)
   - Bit crushing (`crush`)

website/src/pages/learn/faq.mdx

@@ -346,3 +346,11 @@ s   increase by one semitone, i.e. sharp, works for steps of scales, note names
 $:  at the start of a line, defines a member of the stack. is the only stack name that should occur multiple names
 _   before a stack name: mutes the stack, i.e. hush(), for example _$: s("bd"), see above for a different usage.
 ```
+
+## What is a 'hap'?
+
+A 'hap' is a name for a thing that happens, e.g. `note("c3 -")` playing a note and then stopping after a while. Haps have a start and an end. Every separate sound that is produced by strudel is a hap on its own.
+
+We would have called it 'event' if this particular name wasn't used by JavaScript to describe things that happen on html pages, like clicking on a button or hovering over a line of text.
+
+Since strudel is written in JavaScript, this confusion of having the same name for different things is avoided by calling events 'haps'.

website/src/pages/learn/signals.mdx

@@ -55,6 +55,14 @@ There is also `saw2`, `sine2`, `cosine2`, `tri2`, `square2` and `rand2` which ha
 
 <JsDoc client:idle name="brandBy" h={0} />
 
+## time
+
+<JsDoc client:idle name="time" h={0} />
+
+## creating your own signal
+
+<JsDoc client:idle name="signal" h={0} />
+
 ## mouseX
 
 <JsDoc client:idle name="mousex" h={0} />

website/src/pages/learn/xen.mdx

@@ -12,6 +12,12 @@ import { JsDoc } from '../../docs/JsDoc';
 
 These functions allow the use of scales other than your typical chromatic 12 based ones.
 
+### xen(scaleOrRatios)
+
+{/* TODO add explanation of EDO to documentation */}
+
+<JsDoc client:idle name="Pattern.xen" h={0} />
+
 ### tune(scale)
 
 {/* TODO (maybe): combine jsdoc things in tune.mjs with here */}
@@ -110,9 +116,3 @@ You can also give tune a list of frequencies to use as the scale:
     523.2511306012
   ]).mul(220).freq();`}
 />
-
-### xen(scaleOrRatios)
-
-{/* TODO add explanation of EDO to documentation */}
-
-<JsDoc client:idle name="Pattern.xen" h={0} />

website/src/pages/technical-manual/internals.mdx

@@ -186,9 +186,9 @@ These functions are more low level, probably not needed by the live coder.
 
 # Other
 
-## onTrigger
+## onSchedule
 
-<JsDoc client:idle name="Pattern#onTrigger" h={0} />
+<JsDoc client:idle name="Pattern#onSchedule" h={0} />
 
 ## log
 

website/src/pages/technical-manual/patterns.mdx

@@ -8,7 +8,7 @@ import { JsDoc } from '../../docs/JsDoc';
 
 # Patterns
 
-Patterns are the essence of Tidal. Its patterns are abstract entities that represent flows of time as functions, adapting a technique called pure functional reactive programming. Taking a time span as its input, a Pattern can output a set of events that happen within that time span. It depends on the structure of the Pattern how the events are located in time.
+Patterns are the essence of Uzu languages such as Strudel and Tidal. Its patterns are abstract entities that represent flows of time as functions, adapting a technique called pure functional reactive programming. Taking a time span as its input, a Pattern can output a set of events that happen within that time span. It depends on the structure of the Pattern how the events are located in time.
 From now on, this process of generating events from a time span will be called **querying**.
 Example:
 

website/src/pages/technical-manual/repl.mdx

@@ -17,7 +17,7 @@ Besides a UI for playback control and meta information, the main part of the REP
 
 1. The user writes and updates code. Each update transpiles and evaluates it to create a `Pattern` instance
 2. While the REPL is running, the `Scheduler` queries the active `Pattern` by a regular interval, generating `Events` (also known as `Haps` in Strudel) for the next time span.
-3. For each scheduling tick, all generated `Events` are triggered by calling their `onTrigger` method, which is set by the output.
+3. For each scheduling tick, all generated `Events` are triggered by calling their `onSchedule` method, which is set by the output.
 
 <img src="https://codeberg.org/uzu/strudel/raw/branch/talk/talk/public/strudelflow.png" width="600" />
 
@@ -134,10 +134,7 @@ let minLatency = 0.1; // min time before a hap should trigger
 setInterval(() => {
   const haps = pattern.queryArc(time, time + interval);
   time += interval; // increment time
-  haps.forEach((hap) => {
+  haps.forEach((hap) => onSchedule(hap, hap.whole.begin + minLatency));
-    const deadline = hap.whole.begin - time + minLatency;
-    onTrigger(hap, deadline, duration);
-  });
 }, interval * 1000); // query each "interval" seconds
 ```
 
@@ -181,20 +178,19 @@ This example creates the custom control parameters `x` and `y` which are then us
 
 ### Outputs
 
-Now that we know how the value of an event is manipulated using control parameters, we can look at how outputs can use that value to generate anything. The scheduler above was calling the `onTrigger` function which is used to implement the output. A very simple version of the web audio output could look like this:
+Now that we know how the value of an hap is manipulated using control parameters, we can look at how outputs can use that value to generate anything. The scheduler above was calling the `onSchedule` function which is used to implement the output. A very simple version of the web audio output could look like this:
 
 ```js
-function onTrigger(hap, deadline, duration) {
+function onSchedule(hap, time, cps) {
   const { note } = hap.value;
-  const time = getAudioContext().currentTime + deadline;
   const o = getAudioContext().createOscillator();
   o.frequency.value = getFreq(note);
   o.start(time);
-  o.stop(time + event.duration);
+  o.stop(time + hap.duration / cps);
   o.connect(getAudioContext().destination);
 }
 ```
 
-The above example will create an `OscillatorNode` for each event, where the frequency is controlled by the `note` param. In essence, this is how the WebAudio API output of Strudel works, only with many more parameters to control synths, samples and effects.
+The above example will create an `OscillatorNode` for each hap, where the frequency is controlled by the `note` param. In essence, this is how the WebAudio API output of Strudel works, only with many more parameters to control synths, samples and effects.
 
 I want to help, how do I contribute to the [Docs](/technical-manual/docs)?

website/src/repl/audiograph.mjs

@@ -628,7 +628,7 @@ export const debugAudiograph = async (argOptions = {}) => {
 
   /*global all*/
   all((pat) =>
-    pat.onTrigger(async (hap, duration, cps, t) => {
+    pat.onSchedule(async (hap, t, cps) => {
       hap_count++;
       const key = Object.entries(hap.value)
         .map((param) => param.join('/'))
@@ -643,7 +643,7 @@ export const debugAudiograph = async (argOptions = {}) => {
         return;
       }
 
-      await webaudioOutput(hap, t, hap.duration / cps, cps, t);
+      await webaudioOutput(hap, t, cps);
 
       if (hapsBatch && hap_count % hapsBatch === 0) drawDiagram();
     }),

website/src/repl/useReplContext.jsx

@@ -68,7 +68,7 @@ const initialCode = `// LOADING`;
 export function useReplContext() {
   const { isSyncEnabled, audioEngineTarget, prebakeScript, includePrebakeScriptInShare } = useSettings();
   const shouldUseWebaudio = audioEngineTarget !== audioEngineTargets.osc;
-  const defaultOutput = shouldUseWebaudio ? webaudioOutput : superdirtOutput;
+  const onSchedule = shouldUseWebaudio ? webaudioOutput : superdirtOutput;
   const getTime = shouldUseWebaudio ? getAudioContextCurrentTime : getPerformanceTimeSeconds;
   const init = useCallback(() => {
     setActivePattern(getViewingPatternData().id);
@@ -76,7 +76,7 @@ export function useReplContext() {
     const drawContext = getDrawContext();
     const editor = new StrudelMirror({
       sync: isSyncEnabled,
-      defaultOutput,
+      onSchedule,
       getTime,
       setInterval,
       clearInterval,

website/src/settings.mjs

@@ -138,7 +138,7 @@ export const setIsZen = (active) => settingsMap.setKey('isZen', !!active);
 
 const patternSetting = (key) =>
   register(key, (value, pat) =>
-    pat.onTrigger(() => {
+    pat.onSchedule(() => {
       value = Array.isArray(value) ? value.join(' ') : value;
       if (value !== settingsMap.get()[key]) {
         settingsMap.setKey(key, value);