diff --git a/packages/codemirror/codemirror.mjs b/packages/codemirror/codemirror.mjs
index 69fce4b50..a612ab610 100644
--- a/packages/codemirror/codemirror.mjs
+++ b/packages/codemirror/codemirror.mjs
@@ -293,9 +293,9 @@ export class StrudelMirror {
       console.warn('first frame could not be painted');
     }
   }
-  async evaluate() {
+  async evaluate(autostart = true) {
     this.flash();
-    await this.repl.evaluate(this.code);
+    await this.repl.evaluate(this.code, autostart);
   }
   async stop() {
     this.repl.scheduler.stop();
diff --git a/packages/codemirror/keybindings.mjs b/packages/codemirror/keybindings.mjs
index 81dc87a52..d92e9c959 100644
--- a/packages/codemirror/keybindings.mjs
+++ b/packages/codemirror/keybindings.mjs
@@ -1,5 +1,5 @@
 import { defaultKeymap } from '@codemirror/commands';
-import { Prec } from '@codemirror/state';
+import { Prec, EditorState } from '@codemirror/state';
 import { keymap, ViewPlugin } from '@codemirror/view';
 // import { searchKeymap } from '@codemirror/search';
 import { emacs } from '@replit/codemirror-emacs';
@@ -133,5 +133,9 @@ const keymaps = {
 
 export function keybindings(name) {
   const active = keymaps[name];
-  return [active ? Prec.high(active()) : []];
+  const extensions = active ? [Prec.high(active())] : [];
+  if (name === 'vim') {
+    extensions.push(EditorState.allowMultipleSelections.of(true));
+  }
+  return extensions;
 }
diff --git a/packages/core/bench/signal.bench.mjs b/packages/core/bench/signal.bench.mjs
new file mode 100644
index 000000000..bd651ccd3
--- /dev/null
+++ b/packages/core/bench/signal.bench.mjs
@@ -0,0 +1,49 @@
+import { describe, bench } from 'vitest';
+
+import { calculateSteps, rand, useRNG } from '../index.mjs';
+
+const testingResolution = 128;
+
+const _generateRandomPattern = () => rand.iter(testingResolution).fast(testingResolution).firstCycle();
+
+describe('old random', () => {
+  calculateSteps(true);
+  bench(
+    '+tactus',
+    () => {
+      useRNG('legacy');
+      _generateRandomPattern();
+    },
+    {
+      time: 1000,
+      teardown() {
+        useRNG('legacy');
+      },
+    },
+  );
+
+  calculateSteps(false);
+  bench(
+    '-tactus',
+    () => {
+      useRNG('precise');
+      _generateRandomPattern();
+    },
+    {
+      time: 1000,
+      teardown() {
+        useRNG('legacy');
+      },
+    },
+  );
+});
+
+describe('random', () => {
+  calculateSteps(true);
+  bench('+tactus', _generateRandomPattern, { time: 1000 });
+
+  calculateSteps(false);
+  bench('-tactus', _generateRandomPattern, { time: 1000 });
+});
+
+calculateSteps(true);
diff --git a/packages/core/signal.mjs b/packages/core/signal.mjs
index 9ac768951..c9ed21663 100644
--- a/packages/core/signal.mjs
+++ b/packages/core/signal.mjs
@@ -16,7 +16,7 @@ export function steady(value) {
 }
 
 export const signal = (func) => {
-  const query = (state) => [new Hap(undefined, state.span, func(state.span.begin))];
+  const query = (state) => [new Hap(undefined, state.span, func(state.span.begin, state.controls))];
   return new Pattern(query);
 };
 
@@ -186,38 +186,97 @@ export const mouseY = signal(() => _mouseY);
 export const mousex = signal(() => _mouseX);
 export const mouseX = signal(() => _mouseX);
 
-// random signals
+// Random number generators
 
-const xorwise = (x) => {
+// Produce "Avalanche effect" where flipping a single bit of x
+// results in all output bits flipping with probability 0.5
+// See e.g. https://github.com/aappleby/smhasher/blob/0ff96f7835817a27d0487325b6c16033e2992eb5/src/MurmurHash3.cpp#L68-L77
+const _murmurHashFinalizer = (x) => {
+  x |= 0;
+  x ^= x >>> 16;
+  x = Math.imul(x, 0x85ebca6b);
+  x ^= x >>> 13;
+  x = Math.imul(x, 0xc2b2ae35);
+  x ^= x >>> 16;
+  return x >>> 0; // unsigned
+};
+
+// Convert t to a 32 bit integer, preserving temporal resolution down to 1/2^29
+const _tToT = (t) => {
+  return Math.floor(t * 536870912);
+};
+
+// Used to decorrelate nearby T, i, and seed prior to hashing
+const _decorrelate = (T, i = 0, seed = 0) => {
+  const lowBits = (T >>> 0) >>> 0;
+  const highBits = Math.floor(T / 4294967296) >>> 0; // 2^32
+  let key = lowBits ^ Math.imul(highBits ^ 0x85ebca6b, 0xc2b2ae35);
+  key ^= Math.imul(i ^ 0x7f4a7c15, 0x9e3779b9);
+  key ^= Math.imul(seed ^ 0x165667b1, 0x27d4eb2d);
+  return key >>> 0;
+};
+
+const randAt = (T, i = 0, seed = 0) => {
+  return _murmurHashFinalizer(_decorrelate(T, i, seed)) / 4294967296; // 2^32
+};
+
+// n samples at time t
+const timeToRands = (t, n, seed = 0) => {
+  const T = _tToT(t);
+  if (n === 1) {
+    return randAt(T, 0, seed);
+  }
+  const out = new Array(n);
+  for (let i = 0; i < n; i++) out[i] = randAt(T, i, seed);
+  return out;
+};
+
+// Old random signals. Currently the default, but can also be chosen via
+// `useRNG('legacy')`
+
+// stretch 300 cycles over the range of [0,2**29 == 536870912) then apply the xorshift algorithm
+const __xorwise = (x) => {
   const a = (x << 13) ^ x;
   const b = (a >> 17) ^ a;
   return (b << 5) ^ b;
 };
-
-// stretch 300 cycles over the range of [0,2**29 == 536870912) then apply the xorshift algorithm
-const _frac = (x) => x - Math.trunc(x);
-
-const timeToIntSeed = (x) => xorwise(Math.trunc(_frac(x / 300) * 536870912));
-
-const intSeedToRand = (x) => (x % 536870912) / 536870912;
-
-const timeToRand = (x) => Math.abs(intSeedToRand(timeToIntSeed(x)));
-
-const timeToRandsPrime = (seed, n) => {
+const __frac = (x) => x - Math.trunc(x);
+const __timeToIntSeed = (x) => __xorwise(Math.trunc(__frac(x / 300) * 536870912));
+const __intSeedToRand = (x) => (x % 536870912) / 536870912;
+const __timeToRandsPrime = (seed, n) => {
+  if (n === 1) {
+    return Math.abs(__intSeedToRand(seed));
+  }
   const result = [];
-  // eslint-disable-next-line
-  for (let i = 0; i < n; ++i) {
-    result.push(intSeedToRand(seed));
-    seed = xorwise(seed);
+  for (let i = 0; i < n; i++) {
+    result.push(__intSeedToRand(seed));
+    seed = __xorwise(seed);
   }
   return result;
 };
+const __timeToRands = (t, n) => __timeToRandsPrime(__timeToIntSeed(t), n);
 
-const timeToRands = (t, n) => timeToRandsPrime(timeToIntSeed(t), n);
+// End old random
+
+let RNG_MODE = 'legacy';
+export const getRandsAtTime = (t, n = 1, seed = 0) => {
+  return RNG_MODE === 'legacy' ? __timeToRands(t + seed, n) : timeToRands(t, n, seed);
+};
 
 /**
+ * Sets which random number generator to use. Historically Strudel would
+ * use `useRNG('legacy')`, which remains the default. To use a new more statistically
+ * precise RNG, try `useRNG('precise')`.
  *
+ * @name useRNG
+ * @param {string} mod - Mode. One of 'legacy', 'precise'
+ * @example
+ * useRNG('legacy')
+ * // Repeats every 300 cycles
+ * $: n(irand(50)).seg(16).scale("C:minor").ribbon(88, 32)
+ * $: n(irand(50)).seg(16).scale("C:minor").ribbon(388, 32)
  */
+export const useRNG = (mode = 'legacy') => (RNG_MODE = mode);
 
 /**
  * A discrete pattern of numbers from 0 to n-1
@@ -300,13 +359,13 @@ export const binaryNL = (n, nBits = 16) => {
  *   .partials(randL(8))
  */
 export const randL = (n) => {
-  return signal((t) => (nVal) => timeToRands(t, nVal).map(Math.abs)).appLeft(reify(n));
+  return signal((t) => (nVal) => getRandsAtTime(t, nVal).map(Math.abs)).appLeft(reify(n));
 };
 
 export const randrun = (n) => {
-  return signal((t) => {
+  return signal((t, controls) => {
     // Without adding 0.5, the first cycle is always 0,1,2,3,...
-    const rands = timeToRands(t.floor().add(0.5), n);
+    const rands = getRandsAtTime(t.floor().add(0.5), n, controls.randSeed);
     const nums = rands
       .map((n, i) => [n, i])
       .sort((a, b) => (a[0] > b[0]) - (a[0] < b[0]))
@@ -347,6 +406,37 @@ export const scramble = register('scramble', (n, pat) => {
   return _rearrangeWith(_irand(n)._segment(n), n, pat);
 });
 
+/**
+ * Modify a pattern by applying a function to the `randomSeed` control if present
+ *
+ * @param {Function} func Function from seed (or undefined) to seed (or undefined)
+ * @param {Pattern} pat Pattern to update
+ * @returns Pattern
+ */
+export const withSeed = (func, pat) => {
+  return new Pattern((state) => {
+    let { randSeed, ...controls } = state.controls;
+    randSeed = func(randSeed);
+    return pat.query(state.setControls({ ...controls, randSeed }));
+  }, pat._steps);
+};
+
+/**
+ * Change the seed for random signals. Normally, random signals depend on time,
+ * so two patterns at the same time will have the same random values. Specifying
+ * a new seed changes the signal output by `rand`. This also affects other functions
+ * that use randomness, like `shuffle` and `sometimes`.
+ *
+ * @name seed
+ * @param {number} n A new seed. Can be any number.
+ * @example
+ * $: s("hh*4").degrade();
+ * $: s("bd*4").degrade().seed(1); // Will degrade different events from the hi-hat
+ */
+export const seed = register('seed', (n, pat) => {
+  return withSeed(() => n, pat);
+});
+
 /**
  * A continuous pattern of random numbers, between 0 and 1.
  *
@@ -356,7 +446,7 @@ export const scramble = register('scramble', (n, pat) => {
  * s("bd*4,hh*8").cutoff(rand.range(500,8000))
  *
  */
-export const rand = signal(timeToRand);
+export const rand = signal((t, controls) => getRandsAtTime(t, 1, controls.randSeed));
 /**
  * A continuous pattern of random numbers, between -1 and 1
  */
@@ -533,36 +623,32 @@ export const wchooseCycles = (...pairs) => _wchooseWith(rand.segment(1), ...pair
 
 export const wrandcat = wchooseCycles;
 
-function _perlin(t) {
+function _perlin(t, seed = 0) {
   let ta = Math.floor(t);
   let tb = ta + 1;
   const smootherStep = (x) => 6.0 * x ** 5 - 15.0 * x ** 4 + 10.0 * x ** 3;
   const interp = (x) => (a) => (b) => a + smootherStep(x) * (b - a);
-  const v = interp(t - ta)(timeToRand(ta))(timeToRand(tb));
+  const ra = getRandsAtTime(ta, 1, seed);
+  const rb = getRandsAtTime(tb, 1, seed);
+  const v = interp(t - ta)(ra)(rb);
   return v;
 }
-export const perlinWith = (tpat) => {
-  return tpat.fmap(_perlin);
-};
 
-function _berlin(t) {
+function _berlin(t, seed = 0) {
   const prevRidgeStartIndex = Math.floor(t);
   const nextRidgeStartIndex = prevRidgeStartIndex + 1;
 
-  const prevRidgeBottomPoint = timeToRand(prevRidgeStartIndex);
-  const nextRidgeTopPoint = timeToRand(nextRidgeStartIndex) + prevRidgeBottomPoint;
+  const prevRidgeBottomPoint = getRandsAtTime(prevRidgeStartIndex, 1, seed);
+  const height = getRandsAtTime(nextRidgeStartIndex, 1, seed);
+  const nextRidgeTopPoint = prevRidgeBottomPoint + height;
 
   const currentPercent = (t - prevRidgeStartIndex) / (nextRidgeStartIndex - prevRidgeStartIndex);
   const interp = (a, b, t) => {
-    return a + (b - a) * t;
+    return a + t * (b - a);
   };
   return interp(prevRidgeBottomPoint, nextRidgeTopPoint, currentPercent) / 2;
 }
 
-export const berlinWith = (tpat) => {
-  return tpat.fmap(_berlin);
-};
-
 /**
  * Generates a continuous pattern of [perlin noise](https://en.wikipedia.org/wiki/Perlin_noise), in the range 0..1.
  *
@@ -572,7 +658,7 @@ export const berlinWith = (tpat) => {
  * s("bd*4,hh*8").cutoff(perlin.range(500,8000))
  *
  */
-export const perlin = perlinWith(time.fmap((v) => Number(v)));
+export const perlin = signal((t, controls) => _perlin(t, controls.randSeed));
 
 /**
  * Generates a continuous pattern of [berlin noise](conceived by Jame Coyne and Jade Rowland as a joke but turned out to be surprisingly cool and useful,
@@ -584,7 +670,7 @@ export const perlin = perlinWith(time.fmap((v) => Number(v)));
  * n("0!16".add(berlin.fast(4).mul(14))).scale("d:minor")
  *
  */
-export const berlin = berlinWith(time.fmap((v) => Number(v)));
+export const berlin = signal((t, controls) => _berlin(t, controls.randSeed));
 
 export const degradeByWith = register(
   'degradeByWith',
@@ -884,10 +970,48 @@ export const keyDown = register('keyDown', function (pat) {
 });
 
 /**
- * A pattern that gives the duration of events that are combined with it.
+ * A pattern measuring the duration of events,
+ * in cycles per event. `cyclesPer` doesn't have structure itself, but takes structure, and therefore
+ * event durations, from the pattern that it is combined with.
+ * For example `cyclesPer.struct("1 1 [1 1] 1")` would give the same as `"0.25 0.25 [0.125 0.125] 0.25"`.
+ * See also its reciprocal, `per`, also known as `perCycle`.
  * @example
- * sound("bd sd [bd bd] sd*4 [- sd] [bd [bd bd]]").note(delta.withValue(x => 1/x + 20))
+ * // Shorter events are lower in pitch
+ * sound("saw saw [saw saw] saw")
+ *   .note(cyclesPer.range(50, 100))
+ * @example
+ * sound("bd sd [bd bd] sd*4 [- sd] [bd [bd bd]]")
+ *   .note(cyclesPer.add(20))
  */
-export const delta = new Pattern(function (state) {
+export const cyclesPer = new Pattern(function (state) {
   return [new Hap(undefined, state.span, state.span.duration)];
 });
+
+/**
+ * A pattern measuring the 'shortness' of events, or in other words, the duration of pattern events,
+ * in events per cycle. `per` doesn't have structure itself, but takes structure, and therefore
+ * event durations, from the pattern that it is combined with.
+ * For example `per.struct("1 1 [1 1] 1")` would give the same as `"4 4 [8 8] 4"`.
+ * See also its reciprocal, `cyclesPer`.
+ * @synonyms perCycle
+ * @example
+ * // Shorter events are more distorted
+ * n("0 0*2 0 0*2 0 [0 0 0]@2").sound("bd")
+ *  .distort(per.div(2))
+ */
+export const per = new Pattern(function (state) {
+  return [new Hap(undefined, state.span, Fraction(1).div(state.span.duration))];
+});
+
+export const perCycle = per;
+
+/**
+ * Like `per` but measures the shortness of events according to an exponential curve. In
+ * particular, where the event duration halves, the
+ * returned value increases by one. `perx.struct("1 1 [1 [1 1]] 1")` would therefore be
+ * the same as `"3 3 [4 [5 5]] 3"`.
+ */
+export const perx = new Pattern(function (state) {
+  const n = Fraction(1).div(state.span.duration);
+  return [new Hap(undefined, state.span, Math.log(n) / Math.log(2) + 1)];
+});
diff --git a/packages/core/test/pattern.test.mjs b/packages/core/test/pattern.test.mjs
index 408ff274b..aaa14bd27 100644
--- a/packages/core/test/pattern.test.mjs
+++ b/packages/core/test/pattern.test.mjs
@@ -740,20 +740,6 @@ describe('Pattern', () => {
       );
     });
   });
-  describe('signal()', () => {
-    it('Can make saw/saw2', () => {
-      expect(saw.struct(true, true, true, true).firstCycle()).toStrictEqual(
-        sequence(0, 1 / 4, 1 / 2, 3 / 4).firstCycle(),
-      );
-
-      expect(saw2.struct(true, true, true, true).firstCycle()).toStrictEqual(sequence(-1, -0.5, 0, 0.5).firstCycle());
-    });
-    it('Can make isaw/isaw2', () => {
-      expect(isaw.struct(true, true, true, true).firstCycle()).toStrictEqual(sequence(1, 0.75, 0.5, 0.25).firstCycle());
-
-      expect(isaw2.struct(true, true, true, true).firstCycle()).toStrictEqual(sequence(1, 0.5, 0, -0.5).firstCycle());
-    });
-  });
   describe('_setContext()', () => {
     it('Can set the hap context', () => {
       expect(
diff --git a/packages/core/test/signal.test.mjs b/packages/core/test/signal.test.mjs
new file mode 100644
index 000000000..b02f8a08b
--- /dev/null
+++ b/packages/core/test/signal.test.mjs
@@ -0,0 +1,61 @@
+/*
+signal.test.mjs - <short description TODO>
+Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/src/branch/main/packages/core/test/pattern.test.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/>.
+*/
+
+import Fraction from 'fraction.js';
+
+import { describe, it, expect, vi } from 'vitest';
+
+import { saw, saw2, isaw, isaw2, per, perx, cyclesPer } from '../signal.mjs';
+import { fastcat, sequence, State, TimeSpan, Hap } from '../index.mjs';
+
+const st = (begin, end) => new State(ts(begin, end));
+const ts = (begin, end) => new TimeSpan(Fraction(begin), Fraction(end));
+const hap = (whole, part, value, context = {}) => new Hap(whole, part, value, context);
+
+const third = Fraction(1, 3);
+const twothirds = Fraction(2, 3);
+
+const sameFirst = (a, b) => {
+  return expect(a.sortHapsByPart().firstCycle()).toStrictEqual(b.sortHapsByPart().firstCycle());
+};
+
+describe('signal()', () => {
+  it('Can make saw/saw2', () => {
+    expect(saw.struct(true, true, true, true).firstCycle()).toStrictEqual(
+      sequence(0, 1 / 4, 1 / 2, 3 / 4).firstCycle(),
+    );
+
+    expect(saw2.struct(true, true, true, true).firstCycle()).toStrictEqual(sequence(-1, -0.5, 0, 0.5).firstCycle());
+  });
+  it('Can make isaw/isaw2', () => {
+    expect(isaw.struct(true, true, true, true).firstCycle()).toStrictEqual(sequence(1, 0.75, 0.5, 0.25).firstCycle());
+
+    expect(isaw2.struct(true, true, true, true).firstCycle()).toStrictEqual(sequence(1, 0.5, 0, -0.5).firstCycle());
+  });
+});
+
+describe('cyclesPer', () => {
+  it('gives cycles per hap', () => {
+    sameFirst(
+      cyclesPer.struct(true, true, true, fastcat(true, true)),
+      sequence(0.25, 0.25, 0.25, fastcat(0.125, 0.125)).fmap(Fraction),
+    );
+  });
+});
+describe('per', () => {
+  it('gives haps per cycle', () => {
+    sameFirst(per.struct(true, true, true, fastcat(true, true)), sequence(4, 4, 4, fastcat(8, 8)).fmap(Fraction));
+  });
+});
+
+describe('perx', () => {
+  it('gives exponential haps per cycle', () => {
+    sameFirst(
+      perx.struct(true, true, true, fastcat(true, fastcat(true, true))),
+      sequence(3, 3, 3, fastcat(4, fastcat(5, 5))),
+    );
+  });
+});
diff --git a/packages/superdough/audioContext.mjs b/packages/superdough/audioContext.mjs
index 71e01d57d..2c34f9daf 100644
--- a/packages/superdough/audioContext.mjs
+++ b/packages/superdough/audioContext.mjs
@@ -5,6 +5,11 @@ export const setDefaultAudioContext = () => {
   return audioContext;
 };
 
+export const setAudioContext = (context) => {
+  audioContext = context;
+  return audioContext;
+};
+
 export const getAudioContext = () => {
   if (!audioContext) {
     return setDefaultAudioContext();
diff --git a/packages/superdough/feedbackdelay.mjs b/packages/superdough/feedbackdelay.mjs
index c182d6558..b8269bc02 100644
--- a/packages/superdough/feedbackdelay.mjs
+++ b/packages/superdough/feedbackdelay.mjs
@@ -25,7 +25,7 @@ if (typeof DelayNode !== 'undefined') {
     }
   }
 
-  AudioContext.prototype.createFeedbackDelay = function (wet, time, feedback) {
+  BaseAudioContext.prototype.createFeedbackDelay = function (wet, time, feedback) {
     return new FeedbackDelayNode(this, wet, time, feedback);
   };
 }
diff --git a/packages/superdough/helpers.mjs b/packages/superdough/helpers.mjs
index 7b9becdf2..fc7734ea3 100644
--- a/packages/superdough/helpers.mjs
+++ b/packages/superdough/helpers.mjs
@@ -42,6 +42,7 @@ export const getParamADSR = (
   decay,
   sustain,
   release,
+  // min = value at start of attack, max = value at end of attack; it is possible that max < min
   min,
   max,
   begin,
@@ -59,17 +60,15 @@ export const getParamADSR = (
     max = max === 0 ? 0.001 : max;
   }
   const range = max - min;
-  const peak = max;
   const sustainVal = min + sustain * range;
   const duration = end - begin;
 
   const envValAtTime = (time) => {
     let val;
     if (attack > time) {
-      let slope = getSlope(min, peak, 0, attack);
-      val = time * slope + (min > peak ? min : 0);
+      val = time * getSlope(min, max, 0, attack) + min;
     } else {
-      val = (time - attack) * getSlope(peak, sustainVal, 0, decay) + peak;
+      val = (time - attack) * getSlope(max, sustainVal, 0, decay) + max;
     }
     if (curve === 'exponential') {
       val = val || 0.001;
@@ -613,7 +612,7 @@ export const releaseAudioNode = (node) => {
   // make sure all AudioScheduledSourceNodes are in a stopped state
   // https://developer.mozilla.org/en-US/docs/Web/API/AudioScheduledSourceNode
   if (node instanceof AudioScheduledSourceNode) {
-    if (node.onended && node.onended.name !== 'cleanup') {
+    if (process.env.NODE_ENV === 'development' && node.onended && node.onended.name !== 'cleanup') {
       logger(
         `[superdough] Deprecation warning: it seems your code path is setting 'node.onended = callback' instead of using the onceEnded helper`,
       );
diff --git a/packages/superdough/reverb.mjs b/packages/superdough/reverb.mjs
index 2960b597c..c8b6eb3e5 100644
--- a/packages/superdough/reverb.mjs
+++ b/packages/superdough/reverb.mjs
@@ -2,7 +2,7 @@ import reverbGen from './reverbGen.mjs';
 import { clamp } from './util.mjs';
 
 if (typeof AudioContext !== 'undefined') {
-  AudioContext.prototype.adjustLength = function (duration, buffer, speed = 1, offsetAmount = 0) {
+  BaseAudioContext.prototype.adjustLength = function (duration, buffer, speed = 1, offsetAmount = 0) {
     const sampleOffset = Math.floor(clamp(offsetAmount, 0, 1) * buffer.length);
     const newLength = buffer.sampleRate * duration;
     const newBuffer = this.createBuffer(buffer.numberOfChannels, buffer.length, buffer.sampleRate);
@@ -23,7 +23,7 @@ if (typeof AudioContext !== 'undefined') {
     return newBuffer;
   };
 
-  AudioContext.prototype.createReverb = function (duration, fade, lp, dim, ir, irspeed, irbegin) {
+  BaseAudioContext.prototype.createReverb = function (duration, fade, lp, dim, ir, irspeed, irbegin) {
     const convolver = this.createConvolver();
     convolver.generate = (d = 2, fade = 0.1, lp = 15000, dim = 1000, ir, irspeed, irbegin) => {
       convolver.duration = d;
diff --git a/packages/superdough/superdough.mjs b/packages/superdough/superdough.mjs
index 8f79e5b24..fd198c788 100644
--- a/packages/superdough/superdough.mjs
+++ b/packages/superdough/superdough.mjs
@@ -24,20 +24,32 @@ import {
 import { map } from 'nanostores';
 import { errorLogger, logger } from './logger.mjs';
 import { loadBuffer } from './sampler.mjs';
-import { getAudioContext } from './audioContext.mjs';
+import { getAudioContext, setAudioContext } from './audioContext.mjs';
 import { SuperdoughAudioController } from './superdoughoutput.mjs';
 import { getSuperdoughControlTargets } from './superdoughdata.mjs';
+import { resetSeenKeys } from './wavetable.mjs';
 
 export const DEFAULT_MAX_POLYPHONY = 128;
 const DEFAULT_AUDIO_DEVICE_NAME = 'System Standard';
 
-let maxPolyphony = DEFAULT_MAX_POLYPHONY;
+export let maxPolyphony = DEFAULT_MAX_POLYPHONY;
 
+/**
+ * Set the max polyphony. If notes are ringing out via `release` then they will
+ * start to die out in first-in-first-out order once the max polyphony has been hit
+ *
+ * @name setMaxPolyphony
+ * @param {number} Max polyphony. Defaults to 128
+ * @example
+ * setMaxPolyphony(4)
+ * n(irand(24).seg(8)).scale("C#3:minor").room(1).release(4).gain(0.5)
+ *
+ */
 export function setMaxPolyphony(polyphony) {
   maxPolyphony = parseInt(polyphony) ?? DEFAULT_MAX_POLYPHONY;
 }
 
-let multiChannelOrbits = false;
+export let multiChannelOrbits = false;
 export function setMultiChannelOrbits(bool) {
   multiChannelOrbits = bool == true;
 }
@@ -55,6 +67,17 @@ export function applyGainCurve(val) {
   return gainCurveFunc(val);
 }
 
+/**
+ * Apply a function to all gains provided in patterns. Can be used to rescale gain to be
+ * quadratic, exponential, etc. rather than linear
+ *
+ * @name setGainCurve
+ * @param {Function} function to apply to all gain values
+ * @example
+ * setGainCurve((x) => x * x) // quadratic gain
+ * s("bd*4").gain(0.5) // equivalent to 0.25 gain normally
+ *
+ */
 export function setGainCurve(newGainCurveFunc) {
   gainCurveFunc = newGainCurveFunc;
 }
@@ -216,11 +239,13 @@ export function registerWorklet(url) {
 }
 
 let workletsLoading;
-function loadWorklets() {
+export function loadWorklets() {
   if (!workletsLoading) {
     const audioCtx = getAudioContext();
     const allWorkletURLs = externalWorklets.concat([workletsUrl]);
-    workletsLoading = Promise.all(allWorkletURLs.map((workletURL) => audioCtx.audioWorklet.addModule(workletURL)));
+    workletsLoading = Promise.all(allWorkletURLs.map((workletURL) => audioCtx.audioWorklet.addModule(workletURL))).then(
+      () => (workletsLoading = undefined),
+    );
   }
 
   return workletsLoading;
@@ -237,6 +262,7 @@ export async function initAudio(options = {}) {
 
   setMaxPolyphony(maxPolyphony);
   setMultiChannelOrbits(multiChannelOrbits);
+  resetSeenKeys();
   if (typeof window === 'undefined') {
     return;
   }
@@ -258,8 +284,9 @@ export async function initAudio(options = {}) {
       logger('[superdough] failed to set audio interface', 'warning');
     }
   }
-
-  await audioCtx.resume();
+  if ((!audioCtx) instanceof OfflineAudioContext) {
+    await audioCtx.resume();
+  }
   if (disableWorklets) {
     logger('[superdough]: AudioWorklets disabled with disableWorklets');
     return;
@@ -294,6 +321,11 @@ export function getSuperdoughAudioController() {
   return controller;
 }
 
+export function setSuperdoughAudioController(newController) {
+  controller = newController;
+  return controller;
+}
+
 export function connectToDestination(input, channels) {
   const controller = getSuperdoughAudioController();
   controller.output.connectToDestination(input, channels);
@@ -331,7 +363,7 @@ export let analysers = {},
   analysersData = {};
 
 export function getAnalyserById(id, fftSize = 1024, smoothingTimeConstant = 0.5) {
-  if (!analysers[id]) {
+  if (!analysers[id] || analysers[id].audioContext != getAudioContext()) {
     // make sure this doesn't happen too often as it piles up garbage
     const analyserNode = getAudioContext().createAnalyser();
     analyserNode.fftSize = fftSize;
@@ -521,7 +553,6 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
   // duration is passed as value too..
   value.duration = hapDuration;
   // calculate absolute time
-
   if (t < ac.currentTime) {
     console.warn(
       `[superdough]: cannot schedule sounds in the past (target: ${t.toFixed(2)}, now: ${ac.currentTime.toFixed(2)})`,
@@ -949,7 +980,7 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
   }
 
   // analyser
-  if (analyze) {
+  if (analyze && !(ac instanceof OfflineAudioContext)) {
     const analyserNode = getAnalyserById(analyze, 2 ** (fft + 5));
     const analyserSend = effectSend(post, analyserNode, 1);
     audioNodes.push(analyserSend);
diff --git a/packages/superdough/vowel.mjs b/packages/superdough/vowel.mjs
index fda0c6479..bfc1c9fcd 100644
--- a/packages/superdough/vowel.mjs
+++ b/packages/superdough/vowel.mjs
@@ -75,7 +75,7 @@ if (typeof GainNode !== 'undefined') {
     }
   }
 
-  AudioContext.prototype.createVowelFilter = function (letter) {
+  BaseAudioContext.prototype.createVowelFilter = function (letter) {
     return new VowelNode(this, letter);
   };
 }
diff --git a/packages/superdough/wavetable.mjs b/packages/superdough/wavetable.mjs
index 4311c5cab..ebf951a49 100644
--- a/packages/superdough/wavetable.mjs
+++ b/packages/superdough/wavetable.mjs
@@ -40,6 +40,11 @@ export const Warpmode = Object.freeze({
 });
 
 const seenKeys = new Set();
+
+export function resetSeenKeys() {
+  seenKeys.clear();
+}
+
 async function getPayload(url, label, frameLen = 2048) {
   const key = `${url},${frameLen}`;
   if (!seenKeys.has(key)) {
diff --git a/packages/webaudio/webaudio.mjs b/packages/webaudio/webaudio.mjs
index 383e87f87..36ee9d645 100644
--- a/packages/webaudio/webaudio.mjs
+++ b/packages/webaudio/webaudio.mjs
@@ -5,10 +5,21 @@ This program is free software: you can redistribute it and/or modify it under th
 */
 
 import * as strudel from '@strudel/core';
-import { superdough, getAudioContext, setLogger, doughTrigger, registerWorklet } from 'superdough';
+import {
+  superdough,
+  getAudioContext,
+  setLogger,
+  doughTrigger,
+  registerWorklet,
+  setAudioContext,
+  initAudio,
+  setSuperdoughAudioController,
+  resetGlobalEffects,
+  errorLogger,
+} from 'superdough';
 import './supradough.mjs';
 import { workletUrl } from 'supradough';
-
+import { SuperdoughAudioController } from 'superdough/superdoughoutput.mjs';
 registerWorklet(workletUrl);
 
 const { Pattern, logger, repl } = strudel;
@@ -26,6 +37,71 @@ export const webaudioOutput = (hap, _deadline, hapDuration, cps, t) => {
   return superdough(hap2value(hap), t, hapDuration, cps, hap.whole?.begin.valueOf());
 };
 
+export async function renderPatternAudio(
+  pattern,
+  cps,
+  begin,
+  end,
+  sampleRate,
+  maxPolyphony,
+  multiChannelOrbits,
+  downloadName = undefined,
+) {
+  let audioContext = getAudioContext();
+  await audioContext.close();
+  audioContext = new OfflineAudioContext(2, ((end - begin) / cps) * sampleRate, sampleRate);
+  setAudioContext(audioContext);
+  setSuperdoughAudioController(new SuperdoughAudioController(audioContext));
+  await initAudio({
+    maxPolyphony,
+    multiChannelOrbits,
+  });
+  logger('[webaudio] preloading');
+
+  // Calling superdough(...) in ascending onset time order is important
+  // for controls that depend on the audio graph state like `cut`
+  let haps = pattern
+    .queryArc(begin, end, { _cps: cps })
+    .sort((a, b) => a.whole.begin.valueOf() - b.whole.begin.valueOf());
+  for (const hap of haps) {
+    if (hap.hasOnset()) {
+      try {
+        await superdough(
+          hap2value(hap),
+          (hap.whole.begin.valueOf() - begin) / cps,
+          hap.duration / cps,
+          cps,
+          (hap.whole?.begin.valueOf() - begin) / cps,
+        );
+      } catch (err) {
+        errorLogger(err, 'webaudio');
+      }
+    }
+  }
+  logger('[webaudio] start rendering');
+
+  return audioContext
+    .startRendering()
+    .then((renderedBuffer) => {
+      const wavBuffer = audioBufferToWav(renderedBuffer);
+      const blob = new Blob([wavBuffer], { type: 'audio/wav' });
+      const url = URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      a.href = url;
+      downloadName = downloadName ? `${downloadName}.wav` : `${new Date().toISOString()}.wav`;
+      a.download = `${downloadName}`;
+      document.body.appendChild(a);
+      a.click();
+      document.body.removeChild(a);
+      URL.revokeObjectURL(url);
+    })
+    .finally(async () => {
+      setAudioContext(null);
+      setSuperdoughAudioController(null);
+      resetGlobalEffects();
+    });
+}
+
 export function webaudioRepl(options = {}) {
   options = {
     getTime: () => getAudioContext().currentTime,
@@ -38,3 +114,98 @@ export function webaudioRepl(options = {}) {
 Pattern.prototype.dough = function () {
   return this.onTrigger(doughTrigger, 1);
 };
+
+function audioBufferToWav(buffer, opt) {
+  opt = opt || {};
+
+  var numChannels = buffer.numberOfChannels;
+  var sampleRate = buffer.sampleRate;
+  var format = opt.float32 ? 3 : 1;
+  var bitDepth = format === 3 ? 32 : 16;
+
+  var result;
+  if (numChannels === 2) {
+    result = interleave(buffer.getChannelData(0), buffer.getChannelData(1));
+  } else {
+    result = buffer.getChannelData(0);
+  }
+
+  return encodeWAV(result, format, sampleRate, numChannels, bitDepth);
+}
+
+function encodeWAV(samples, format, sampleRate, numChannels, bitDepth) {
+  var bytesPerSample = bitDepth / 8;
+  var blockAlign = numChannels * bytesPerSample;
+
+  var buffer = new ArrayBuffer(44 + samples.length * bytesPerSample);
+  var view = new DataView(buffer);
+
+  /* RIFF identifier */
+  writeString(view, 0, 'RIFF');
+  /* RIFF chunk length */
+  view.setUint32(4, 36 + samples.length * bytesPerSample, true);
+  /* RIFF type */
+  writeString(view, 8, 'WAVE');
+  /* format chunk identifier */
+  writeString(view, 12, 'fmt ');
+  /* format chunk length */
+  view.setUint32(16, 16, true);
+  /* sample format (raw) */
+  view.setUint16(20, format, true);
+  /* channel count */
+  view.setUint16(22, numChannels, true);
+  /* sample rate */
+  view.setUint32(24, sampleRate, true);
+  /* byte rate (sample rate * block align) */
+  view.setUint32(28, sampleRate * blockAlign, true);
+  /* block align (channel count * bytes per sample) */
+  view.setUint16(32, blockAlign, true);
+  /* bits per sample */
+  view.setUint16(34, bitDepth, true);
+  /* data chunk identifier */
+  writeString(view, 36, 'data');
+  /* data chunk length */
+  view.setUint32(40, samples.length * bytesPerSample, true);
+  if (format === 1) {
+    // Raw PCM
+    floatTo16BitPCM(view, 44, samples);
+  } else {
+    writeFloat32(view, 44, samples);
+  }
+
+  return buffer;
+}
+
+function interleave(inputL, inputR) {
+  var length = inputL.length + inputR.length;
+  var result = new Float32Array(length);
+
+  var index = 0;
+  var inputIndex = 0;
+
+  while (index < length) {
+    result[index++] = inputL[inputIndex];
+    result[index++] = inputR[inputIndex];
+    inputIndex++;
+  }
+  return result;
+}
+
+function writeFloat32(output, offset, input) {
+  for (var i = 0; i < input.length; i++, offset += 4) {
+    output.setFloat32(offset, input[i], true);
+  }
+}
+
+function floatTo16BitPCM(output, offset, input) {
+  for (var i = 0; i < input.length; i++, offset += 2) {
+    var s = Math.max(-1, Math.min(1, input[i]));
+    output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7fff, true);
+  }
+}
+
+function writeString(view, offset, string) {
+  for (var i = 0; i < string.length; i++) {
+    view.setUint8(offset + i, string.charCodeAt(i));
+  }
+}
diff --git a/test/__snapshots__/examples.test.mjs.snap b/test/__snapshots__/examples.test.mjs.snap
index 17dcb08ba..5f8133ec5 100644
--- a/test/__snapshots__/examples.test.mjs.snap
+++ b/test/__snapshots__/examples.test.mjs.snap
@@ -2539,6 +2539,84 @@ exports[`runs examples > example "cut" example index 0 1`] = `
 ]
 `;
 
+exports[`runs examples > example "cyclesPer" example index 0 1`] = `
+[
+  "[ 0/1 → 1/4 | s:saw note:62.5 ]",
+  "[ 1/4 → 1/2 | s:saw note:62.5 ]",
+  "[ 1/2 → 5/8 | s:saw note:56.25 ]",
+  "[ 5/8 → 3/4 | s:saw note:56.25 ]",
+  "[ 3/4 → 1/1 | s:saw note:62.5 ]",
+  "[ 1/1 → 5/4 | s:saw note:62.5 ]",
+  "[ 5/4 → 3/2 | s:saw note:62.5 ]",
+  "[ 3/2 → 13/8 | s:saw note:56.25 ]",
+  "[ 13/8 → 7/4 | s:saw note:56.25 ]",
+  "[ 7/4 → 2/1 | s:saw note:62.5 ]",
+  "[ 2/1 → 9/4 | s:saw note:62.5 ]",
+  "[ 9/4 → 5/2 | s:saw note:62.5 ]",
+  "[ 5/2 → 21/8 | s:saw note:56.25 ]",
+  "[ 21/8 → 11/4 | s:saw note:56.25 ]",
+  "[ 11/4 → 3/1 | s:saw note:62.5 ]",
+  "[ 3/1 → 13/4 | s:saw note:62.5 ]",
+  "[ 13/4 → 7/2 | s:saw note:62.5 ]",
+  "[ 7/2 → 29/8 | s:saw note:56.25 ]",
+  "[ 29/8 → 15/4 | s:saw note:56.25 ]",
+  "[ 15/4 → 4/1 | s:saw note:62.5 ]",
+]
+`;
+
+exports[`runs examples > example "cyclesPer" example index 1 1`] = `
+[
+  "[ 0/1 → 1/6 | s:bd note:20.166666666666668 ]",
+  "[ 1/6 → 1/3 | s:sd note:20.166666666666668 ]",
+  "[ 1/3 → 5/12 | s:bd note:20.083333333333332 ]",
+  "[ 5/12 → 1/2 | s:bd note:20.083333333333332 ]",
+  "[ 1/2 → 13/24 | s:sd note:20.041666666666668 ]",
+  "[ 13/24 → 7/12 | s:sd note:20.041666666666668 ]",
+  "[ 7/12 → 5/8 | s:sd note:20.041666666666668 ]",
+  "[ 5/8 → 2/3 | s:sd note:20.041666666666668 ]",
+  "[ 3/4 → 5/6 | s:sd note:20.083333333333332 ]",
+  "[ 5/6 → 11/12 | s:bd note:20.083333333333332 ]",
+  "[ 11/12 → 23/24 | s:bd note:20.041666666666668 ]",
+  "[ 23/24 → 1/1 | s:bd note:20.041666666666668 ]",
+  "[ 1/1 → 7/6 | s:bd note:20.166666666666668 ]",
+  "[ 7/6 → 4/3 | s:sd note:20.166666666666668 ]",
+  "[ 4/3 → 17/12 | s:bd note:20.083333333333332 ]",
+  "[ 17/12 → 3/2 | s:bd note:20.083333333333332 ]",
+  "[ 3/2 → 37/24 | s:sd note:20.041666666666668 ]",
+  "[ 37/24 → 19/12 | s:sd note:20.041666666666668 ]",
+  "[ 19/12 → 13/8 | s:sd note:20.041666666666668 ]",
+  "[ 13/8 → 5/3 | s:sd note:20.041666666666668 ]",
+  "[ 7/4 → 11/6 | s:sd note:20.083333333333332 ]",
+  "[ 11/6 → 23/12 | s:bd note:20.083333333333332 ]",
+  "[ 23/12 → 47/24 | s:bd note:20.041666666666668 ]",
+  "[ 47/24 → 2/1 | s:bd note:20.041666666666668 ]",
+  "[ 2/1 → 13/6 | s:bd note:20.166666666666668 ]",
+  "[ 13/6 → 7/3 | s:sd note:20.166666666666668 ]",
+  "[ 7/3 → 29/12 | s:bd note:20.083333333333332 ]",
+  "[ 29/12 → 5/2 | s:bd note:20.083333333333332 ]",
+  "[ 5/2 → 61/24 | s:sd note:20.041666666666668 ]",
+  "[ 61/24 → 31/12 | s:sd note:20.041666666666668 ]",
+  "[ 31/12 → 21/8 | s:sd note:20.041666666666668 ]",
+  "[ 21/8 → 8/3 | s:sd note:20.041666666666668 ]",
+  "[ 11/4 → 17/6 | s:sd note:20.083333333333332 ]",
+  "[ 17/6 → 35/12 | s:bd note:20.083333333333332 ]",
+  "[ 35/12 → 71/24 | s:bd note:20.041666666666668 ]",
+  "[ 71/24 → 3/1 | s:bd note:20.041666666666668 ]",
+  "[ 3/1 → 19/6 | s:bd note:20.166666666666668 ]",
+  "[ 19/6 → 10/3 | s:sd note:20.166666666666668 ]",
+  "[ 10/3 → 41/12 | s:bd note:20.083333333333332 ]",
+  "[ 41/12 → 7/2 | s:bd note:20.083333333333332 ]",
+  "[ 7/2 → 85/24 | s:sd note:20.041666666666668 ]",
+  "[ 85/24 → 43/12 | s:sd note:20.041666666666668 ]",
+  "[ 43/12 → 29/8 | s:sd note:20.041666666666668 ]",
+  "[ 29/8 → 11/3 | s:sd note:20.041666666666668 ]",
+  "[ 15/4 → 23/6 | s:sd note:20.083333333333332 ]",
+  "[ 23/6 → 47/12 | s:bd note:20.083333333333332 ]",
+  "[ 47/12 → 95/24 | s:bd note:20.041666666666668 ]",
+  "[ 95/24 → 4/1 | s:bd note:20.041666666666668 ]",
+]
+`;
+
 exports[`runs examples > example "decay" example index 0 1`] = `
 [
   "[ 0/1 → 1/4 | note:c3 decay:0.1 sustain:0 ]",
@@ -2784,59 +2862,6 @@ exports[`runs examples > example "delaysync" example index 0 1`] = `
 ]
 `;
 
-exports[`runs examples > example "delta" example index 0 1`] = `
-[
-  "[ 0/1 → 1/6 | s:bd note:26 ]",
-  "[ 1/6 → 1/3 | s:sd note:26 ]",
-  "[ 1/3 → 5/12 | s:bd note:32 ]",
-  "[ 5/12 → 1/2 | s:bd note:32 ]",
-  "[ 1/2 → 13/24 | s:sd note:44 ]",
-  "[ 13/24 → 7/12 | s:sd note:44 ]",
-  "[ 7/12 → 5/8 | s:sd note:44 ]",
-  "[ 5/8 → 2/3 | s:sd note:44 ]",
-  "[ 3/4 → 5/6 | s:sd note:32 ]",
-  "[ 5/6 → 11/12 | s:bd note:32 ]",
-  "[ 11/12 → 23/24 | s:bd note:44 ]",
-  "[ 23/24 → 1/1 | s:bd note:44 ]",
-  "[ 1/1 → 7/6 | s:bd note:26 ]",
-  "[ 7/6 → 4/3 | s:sd note:26 ]",
-  "[ 4/3 → 17/12 | s:bd note:32 ]",
-  "[ 17/12 → 3/2 | s:bd note:32 ]",
-  "[ 3/2 → 37/24 | s:sd note:44 ]",
-  "[ 37/24 → 19/12 | s:sd note:44 ]",
-  "[ 19/12 → 13/8 | s:sd note:44 ]",
-  "[ 13/8 → 5/3 | s:sd note:44 ]",
-  "[ 7/4 → 11/6 | s:sd note:32 ]",
-  "[ 11/6 → 23/12 | s:bd note:32 ]",
-  "[ 23/12 → 47/24 | s:bd note:44 ]",
-  "[ 47/24 → 2/1 | s:bd note:44 ]",
-  "[ 2/1 → 13/6 | s:bd note:26 ]",
-  "[ 13/6 → 7/3 | s:sd note:26 ]",
-  "[ 7/3 → 29/12 | s:bd note:32 ]",
-  "[ 29/12 → 5/2 | s:bd note:32 ]",
-  "[ 5/2 → 61/24 | s:sd note:44 ]",
-  "[ 61/24 → 31/12 | s:sd note:44 ]",
-  "[ 31/12 → 21/8 | s:sd note:44 ]",
-  "[ 21/8 → 8/3 | s:sd note:44 ]",
-  "[ 11/4 → 17/6 | s:sd note:32 ]",
-  "[ 17/6 → 35/12 | s:bd note:32 ]",
-  "[ 35/12 → 71/24 | s:bd note:44 ]",
-  "[ 71/24 → 3/1 | s:bd note:44 ]",
-  "[ 3/1 → 19/6 | s:bd note:26 ]",
-  "[ 19/6 → 10/3 | s:sd note:26 ]",
-  "[ 10/3 → 41/12 | s:bd note:32 ]",
-  "[ 41/12 → 7/2 | s:bd note:32 ]",
-  "[ 7/2 → 85/24 | s:sd note:44 ]",
-  "[ 85/24 → 43/12 | s:sd note:44 ]",
-  "[ 43/12 → 29/8 | s:sd note:44 ]",
-  "[ 29/8 → 11/3 | s:sd note:44 ]",
-  "[ 15/4 → 23/6 | s:sd note:32 ]",
-  "[ 23/6 → 47/12 | s:bd note:32 ]",
-  "[ 47/12 → 95/24 | s:bd note:44 ]",
-  "[ 95/24 → 4/1 | s:bd note:44 ]",
-]
-`;
-
 exports[`runs examples > example "density" example index 0 1`] = `
 [
   "[ 0/1 → 1/4 | s:crackle density:0.01 ]",
@@ -7966,6 +7991,51 @@ exports[`runs examples > example "penv" example index 0 1`] = `
 ]
 `;
 
+exports[`runs examples > example "per" example index 0 1`] = `
+[
+  "[ 0/1 → 1/7 | n:0 s:bd distort:3.5 ]",
+  "[ 1/7 → 3/14 | n:0 s:bd distort:7 ]",
+  "[ 3/14 → 2/7 | n:0 s:bd distort:7 ]",
+  "[ 2/7 → 3/7 | n:0 s:bd distort:3.5 ]",
+  "[ 3/7 → 1/2 | n:0 s:bd distort:7 ]",
+  "[ 1/2 → 4/7 | n:0 s:bd distort:7 ]",
+  "[ 4/7 → 5/7 | n:0 s:bd distort:3.5 ]",
+  "[ 5/7 → 17/21 | n:0 s:bd distort:5.25 ]",
+  "[ 17/21 → 19/21 | n:0 s:bd distort:5.25 ]",
+  "[ 19/21 → 1/1 | n:0 s:bd distort:5.25 ]",
+  "[ 1/1 → 8/7 | n:0 s:bd distort:3.5 ]",
+  "[ 8/7 → 17/14 | n:0 s:bd distort:7 ]",
+  "[ 17/14 → 9/7 | n:0 s:bd distort:7 ]",
+  "[ 9/7 → 10/7 | n:0 s:bd distort:3.5 ]",
+  "[ 10/7 → 3/2 | n:0 s:bd distort:7 ]",
+  "[ 3/2 → 11/7 | n:0 s:bd distort:7 ]",
+  "[ 11/7 → 12/7 | n:0 s:bd distort:3.5 ]",
+  "[ 12/7 → 38/21 | n:0 s:bd distort:5.25 ]",
+  "[ 38/21 → 40/21 | n:0 s:bd distort:5.25 ]",
+  "[ 40/21 → 2/1 | n:0 s:bd distort:5.25 ]",
+  "[ 2/1 → 15/7 | n:0 s:bd distort:3.5 ]",
+  "[ 15/7 → 31/14 | n:0 s:bd distort:7 ]",
+  "[ 31/14 → 16/7 | n:0 s:bd distort:7 ]",
+  "[ 16/7 → 17/7 | n:0 s:bd distort:3.5 ]",
+  "[ 17/7 → 5/2 | n:0 s:bd distort:7 ]",
+  "[ 5/2 → 18/7 | n:0 s:bd distort:7 ]",
+  "[ 18/7 → 19/7 | n:0 s:bd distort:3.5 ]",
+  "[ 19/7 → 59/21 | n:0 s:bd distort:5.25 ]",
+  "[ 59/21 → 61/21 | n:0 s:bd distort:5.25 ]",
+  "[ 61/21 → 3/1 | n:0 s:bd distort:5.25 ]",
+  "[ 3/1 → 22/7 | n:0 s:bd distort:3.5 ]",
+  "[ 22/7 → 45/14 | n:0 s:bd distort:7 ]",
+  "[ 45/14 → 23/7 | n:0 s:bd distort:7 ]",
+  "[ 23/7 → 24/7 | n:0 s:bd distort:3.5 ]",
+  "[ 24/7 → 7/2 | n:0 s:bd distort:7 ]",
+  "[ 7/2 → 25/7 | n:0 s:bd distort:7 ]",
+  "[ 25/7 → 26/7 | n:0 s:bd distort:3.5 ]",
+  "[ 26/7 → 80/21 | n:0 s:bd distort:5.25 ]",
+  "[ 80/21 → 82/21 | n:0 s:bd distort:5.25 ]",
+  "[ 82/21 → 4/1 | n:0 s:bd distort:5.25 ]",
+]
+`;
+
 exports[`runs examples > example "perlin" example index 0 1`] = `
 [
   "[ 0/1 → 1/8 | s:hh cutoff:500 ]",
@@ -10343,6 +10413,18 @@ exports[`runs examples > example "scrub" example index 1 1`] = `
 ]
 `;
 
+exports[`runs examples > example "seed" example index 0 1`] = `
+[
+  "[ 0/1 → 1/4 | s:bd ]",
+  "[ 1/4 → 1/2 | s:bd ]",
+  "[ 1/2 → 3/4 | s:bd ]",
+  "[ 1/1 → 5/4 | s:bd ]",
+  "[ 7/4 → 2/1 | s:bd ]",
+  "[ 9/4 → 5/2 | s:bd ]",
+  "[ 11/4 → 3/1 | s:bd ]",
+]
+`;
+
 exports[`runs examples > example "segment" example index 0 1`] = `
 [
   "[ 0/1 → 1/24 | note:40 ]",
@@ -10526,6 +10608,64 @@ exports[`runs examples > example "seqPLoop" example index 0 1`] = `
 ]
 `;
 
+exports[`runs examples > example "setGainCurve" example index 0 1`] = `
+[
+  "[ 0/1 → 1/4 | s:bd gain:0.5 ]",
+  "[ 1/4 → 1/2 | s:bd gain:0.5 ]",
+  "[ 1/2 → 3/4 | s:bd gain:0.5 ]",
+  "[ 3/4 → 1/1 | s:bd gain:0.5 ]",
+  "[ 1/1 → 5/4 | s:bd gain:0.5 ]",
+  "[ 5/4 → 3/2 | s:bd gain:0.5 ]",
+  "[ 3/2 → 7/4 | s:bd gain:0.5 ]",
+  "[ 7/4 → 2/1 | s:bd gain:0.5 ]",
+  "[ 2/1 → 9/4 | s:bd gain:0.5 ]",
+  "[ 9/4 → 5/2 | s:bd gain:0.5 ]",
+  "[ 5/2 → 11/4 | s:bd gain:0.5 ]",
+  "[ 11/4 → 3/1 | s:bd gain:0.5 ]",
+  "[ 3/1 → 13/4 | s:bd gain:0.5 ]",
+  "[ 13/4 → 7/2 | s:bd gain:0.5 ]",
+  "[ 7/2 → 15/4 | s:bd gain:0.5 ]",
+  "[ 15/4 → 4/1 | s:bd gain:0.5 ]",
+]
+`;
+
+exports[`runs examples > example "setMaxPolyphony" example index 0 1`] = `
+[
+  "[ 0/1 → 1/8 | note:C#3 room:1 release:4 gain:0.5 ]",
+  "[ 1/8 → 1/4 | note:E5 room:1 release:4 gain:0.5 ]",
+  "[ 1/4 → 3/8 | note:D#4 room:1 release:4 gain:0.5 ]",
+  "[ 3/8 → 1/2 | note:E4 room:1 release:4 gain:0.5 ]",
+  "[ 1/2 → 5/8 | note:B3 room:1 release:4 gain:0.5 ]",
+  "[ 5/8 → 3/4 | note:F#3 room:1 release:4 gain:0.5 ]",
+  "[ 3/4 → 7/8 | note:G#3 room:1 release:4 gain:0.5 ]",
+  "[ 7/8 → 1/1 | note:E4 room:1 release:4 gain:0.5 ]",
+  "[ 1/1 → 9/8 | note:A4 room:1 release:4 gain:0.5 ]",
+  "[ 9/8 → 5/4 | note:E5 room:1 release:4 gain:0.5 ]",
+  "[ 5/4 → 11/8 | note:F#5 room:1 release:4 gain:0.5 ]",
+  "[ 11/8 → 3/2 | note:G#3 room:1 release:4 gain:0.5 ]",
+  "[ 3/2 → 13/8 | note:C#5 room:1 release:4 gain:0.5 ]",
+  "[ 13/8 → 7/4 | note:G#4 room:1 release:4 gain:0.5 ]",
+  "[ 7/4 → 15/8 | note:G#3 room:1 release:4 gain:0.5 ]",
+  "[ 15/8 → 2/1 | note:C#5 room:1 release:4 gain:0.5 ]",
+  "[ 2/1 → 17/8 | note:E6 room:1 release:4 gain:0.5 ]",
+  "[ 17/8 → 9/4 | note:C#6 room:1 release:4 gain:0.5 ]",
+  "[ 9/4 → 19/8 | note:D#4 room:1 release:4 gain:0.5 ]",
+  "[ 19/8 → 5/2 | note:B5 room:1 release:4 gain:0.5 ]",
+  "[ 5/2 → 21/8 | note:G#4 room:1 release:4 gain:0.5 ]",
+  "[ 21/8 → 11/4 | note:F#3 room:1 release:4 gain:0.5 ]",
+  "[ 11/4 → 23/8 | note:D#5 room:1 release:4 gain:0.5 ]",
+  "[ 23/8 → 3/1 | note:C#3 room:1 release:4 gain:0.5 ]",
+  "[ 3/1 → 25/8 | note:A3 room:1 release:4 gain:0.5 ]",
+  "[ 25/8 → 13/4 | note:D#4 room:1 release:4 gain:0.5 ]",
+  "[ 13/4 → 27/8 | note:E6 room:1 release:4 gain:0.5 ]",
+  "[ 27/8 → 7/2 | note:E4 room:1 release:4 gain:0.5 ]",
+  "[ 7/2 → 29/8 | note:E4 room:1 release:4 gain:0.5 ]",
+  "[ 29/8 → 15/4 | note:D#6 room:1 release:4 gain:0.5 ]",
+  "[ 15/4 → 31/8 | note:A5 room:1 release:4 gain:0.5 ]",
+  "[ 31/8 → 4/1 | note:F#5 room:1 release:4 gain:0.5 ]",
+]
+`;
+
 exports[`runs examples > example "setcpm" example index 0 1`] = `
 [
   "[ 0/1 → 1/4 | s:bd bank:tr707 ]",
@@ -12871,6 +13011,75 @@ exports[`runs examples > example "unit" example index 0 1`] = `
 ]
 `;
 
+exports[`runs examples > example "useRNG" example index 0 1`] = `
+[
+  "[ 0/1 → 1/16 | note:D8 ]",
+  "[ 1/16 → 1/8 | note:Bb7 ]",
+  "[ 1/8 → 3/16 | note:Ab6 ]",
+  "[ 3/16 → 1/4 | note:D5 ]",
+  "[ 1/4 → 5/16 | note:Ab9 ]",
+  "[ 5/16 → 3/8 | note:D3 ]",
+  "[ 3/8 → 7/16 | note:G5 ]",
+  "[ 7/16 → 1/2 | note:G3 ]",
+  "[ 1/2 → 9/16 | note:Ab3 ]",
+  "[ 9/16 → 5/8 | note:Eb6 ]",
+  "[ 5/8 → 11/16 | note:Eb6 ]",
+  "[ 11/16 → 3/4 | note:Eb5 ]",
+  "[ 3/4 → 13/16 | note:G7 ]",
+  "[ 13/16 → 7/8 | note:Bb5 ]",
+  "[ 7/8 → 15/16 | note:D3 ]",
+  "[ 15/16 → 1/1 | note:Eb7 ]",
+  "[ 1/1 → 17/16 | note:Eb9 ]",
+  "[ 17/16 → 9/8 | note:G8 ]",
+  "[ 9/8 → 19/16 | note:Ab3 ]",
+  "[ 19/16 → 5/4 | note:Ab5 ]",
+  "[ 5/4 → 21/16 | note:C10 ]",
+  "[ 21/16 → 11/8 | note:C7 ]",
+  "[ 11/8 → 23/16 | note:G5 ]",
+  "[ 23/16 → 3/2 | note:Ab7 ]",
+  "[ 3/2 → 25/16 | note:G6 ]",
+  "[ 25/16 → 13/8 | note:Bb6 ]",
+  "[ 13/8 → 27/16 | note:Eb9 ]",
+  "[ 27/16 → 7/4 | note:G9 ]",
+  "[ 7/4 → 29/16 | note:G7 ]",
+  "[ 29/16 → 15/8 | note:C10 ]",
+  "[ 15/8 → 31/16 | note:Eb3 ]",
+  "[ 31/16 → 2/1 | note:Ab7 ]",
+  "[ 2/1 → 33/16 | note:F6 ]",
+  "[ 33/16 → 17/8 | note:C5 ]",
+  "[ 17/8 → 35/16 | note:Ab4 ]",
+  "[ 35/16 → 9/4 | note:G5 ]",
+  "[ 9/4 → 37/16 | note:C9 ]",
+  "[ 37/16 → 19/8 | note:Eb6 ]",
+  "[ 19/8 → 39/16 | note:C9 ]",
+  "[ 39/16 → 5/2 | note:Eb9 ]",
+  "[ 5/2 → 41/16 | note:D5 ]",
+  "[ 41/16 → 21/8 | note:F5 ]",
+  "[ 21/8 → 43/16 | note:F9 ]",
+  "[ 43/16 → 11/4 | note:Bb7 ]",
+  "[ 11/4 → 45/16 | note:Ab6 ]",
+  "[ 45/16 → 23/8 | note:Bb9 ]",
+  "[ 23/8 → 47/16 | note:C8 ]",
+  "[ 47/16 → 3/1 | note:Eb5 ]",
+  "[ 3/1 → 49/16 | note:F3 ]",
+  "[ 49/16 → 25/8 | note:G4 ]",
+  "[ 25/8 → 51/16 | note:D7 ]",
+  "[ 51/16 → 13/4 | note:D4 ]",
+  "[ 13/4 → 53/16 | note:F8 ]",
+  "[ 53/16 → 27/8 | note:C7 ]",
+  "[ 27/8 → 55/16 | note:Ab5 ]",
+  "[ 55/16 → 7/2 | note:Ab3 ]",
+  "[ 7/2 → 57/16 | note:F9 ]",
+  "[ 57/16 → 29/8 | note:D8 ]",
+  "[ 29/8 → 59/16 | note:F5 ]",
+  "[ 59/16 → 15/4 | note:Eb9 ]",
+  "[ 15/4 → 61/16 | note:Bb4 ]",
+  "[ 61/16 → 31/8 | note:C6 ]",
+  "[ 31/8 → 63/16 | note:C4 ]",
+  "[ 63/16 → 4/1 | note:G8 ]",
+]
+`;
+
 exports[`runs examples > example "velocity" example index 0 1`] = `
 [
   "[ 0/1 → 1/8 | s:hh gain:0.4 velocity:0.4 ]",
diff --git a/vitest.config.mjs b/vitest.config.mjs
index dcdde1133..47f624771 100644
--- a/vitest.config.mjs
+++ b/vitest.config.mjs
@@ -16,5 +16,6 @@ export default defineConfig({
       '**/{karma,rollup,webpack,vite,vitest,jest,ava,babel,nyc,cypress}.config.*',
       '**/shared.test.mjs',
     ],
+    setupFiles: './vitest.setup.mjs',
   },
 });
diff --git a/vitest.setup.mjs b/vitest.setup.mjs
new file mode 100644
index 000000000..ea965df6d
--- /dev/null
+++ b/vitest.setup.mjs
@@ -0,0 +1,7 @@
+import { afterEach } from 'vitest';
+import { useRNG } from './packages/core/signal.mjs';
+
+afterEach(() => {
+  // Avoid bleed between tests
+  useRNG('legacy');
+});
diff --git a/website/src/pages/learn/mini-notation.mdx b/website/src/pages/learn/mini-notation.mdx
index 02ead7434..8b09f12f4 100644
--- a/website/src/pages/learn/mini-notation.mdx
+++ b/website/src/pages/learn/mini-notation.mdx
@@ -142,6 +142,8 @@ The "~" represents a rest, and will create silence between other events:
 
 <MiniRepl client:idle tune={`note("[b4 [~ c5] d5 e5]")`} punchcard />
 
+Alternatively, "-" can be used instead of "~". It means the same thing.
+
 ## Parallel / polyphony
 
 Using commas, we can play chords.
diff --git a/website/src/repl/audiograph.mjs b/website/src/repl/audiograph.mjs
new file mode 100644
index 000000000..2876388a8
--- /dev/null
+++ b/website/src/repl/audiograph.mjs
@@ -0,0 +1,651 @@
+/*
+audiograph.mjs - show a svg view of the web audio API graph built during a playback
+Copyright (C) 2025 Strudel contributors - see <https://codeberg.org/uzu/strudel/src/branch/main/website/src/repl/audiograph.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/>.
+*/
+
+// main entry point is `debugAudiograph`
+import { logger } from '@strudel/core';
+import { getAudioContext, getSuperdoughAudioController, webaudioOutput } from '@strudel/webaudio';
+
+let mermaid = null;
+let svgPanZoom = null;
+
+let running = false;
+let hap_count = 0;
+
+let cache = new Map();
+const initCache = JSON.stringify({
+  connect: [],
+  where: [],
+  disconnectAll: 0,
+  disconnectOne: 0,
+  hasStop: false,
+  stopCount: 0,
+  ac: null,
+  creation: null,
+});
+
+let toggleOrig;
+
+function stackTrace() {
+  var err = new Error();
+  const stacktrace = err.stack;
+  const lines = stacktrace.split('\n');
+  let lineIndex = lines.findIndex((line) => line !== 'Error' && !line.includes('audiograph.mjs'));
+  if (lines[lineIndex].includes('gainNode')) lineIndex++;
+  if (lines[lineIndex].includes('getWorklet')) lineIndex++;
+  const line = lines[lineIndex].replace(/\s*at\s/, '').replace('http', '@');
+  let match;
+  match = line.match(/([^@]*)@.*packages(\/[^:]+:\d+:\d+)/);
+  if (match) {
+    return match[1].replace(/[^.:/a-zA-Z0-9]/g, '') + '@' + match[2].replace(/[^.:/a-zA-Z0-9]/g, '');
+  }
+  return '@';
+}
+
+// This captures all AudioNodes lazily
+// when an `.audioid` property is called
+// no solution was found to hook
+// AudioNode's constructor directly
+let audioid = 0;
+const lazyRegister = (o) => {
+  Object.defineProperty(o.prototype, 'audioid', {
+    get: function () {
+      if (!this._audioid) {
+        this._audioid = ++audioid;
+        const s = JSON.parse(initCache);
+        s.type = this.constructor.name === 'AudiographNode' ? this.constructor._parentClassName : this.constructor.name;
+        // special case for subclassed AudioNodes
+        // they are implemented in superdough but hard to get a reference on here
+        // they are not AudioScheduledSourceNodes anyway
+        if (['FeedbackDelayNode', 'VowelNode'].indexOf(s.type) === -1) {
+          s.hasStop = window[s.type].prototype instanceof AudioScheduledSourceNode;
+        }
+        s.ac = this.context?.constructor.name || 'AudioParam';
+        s.creation = s.creation || stackTrace();
+        cache.set(this._audioid, s);
+      }
+      return this._audioid;
+    },
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+// extend a specific AudioNode's constructor
+// necessary when creation is done direclty by
+// calling the constructor
+// eg: new GainNode(...)
+const audioNodeHook = (node) => {
+  const name = node.prototype.constructor.name;
+  const PatchedNode = class AudiographNode extends node {
+    constructor(...args) {
+      super(...args);
+      // trigger the lazy register
+      this._audioid = this.audioid;
+    }
+  };
+  PatchedNode._parentClassName = name;
+  window[name] = PatchedNode;
+};
+
+const drawMessage = async function (message) {
+  const element = document.querySelector('.strudel-mermaid');
+  let gd = '';
+  gd += '---\n';
+  gd += 'config:\n';
+  gd += '  flowchart:\n';
+  gd += '    wrappingWidth: 600\n';
+  gd += '---\n';
+  gd += 'flowchart LR\n';
+  gd += 'id[' + message.replaceAll(' ', '&nbsp;') + ']\n';
+
+  let { svg } = await mermaid.render('strudelSvgId', gd);
+  svg = svg.replace(/max-width:\s[0-9.]*px;/i, 'height: 100%');
+  svg = svg.replaceAll('&amp;nbsp;', ' ');
+  element.innerHTML = svg;
+};
+
+const drawDiagram = async function () {
+  const element = document.querySelector('.strudel-mermaid');
+  let code = window.strudelMirror.code;
+  code = code.replace(/^await debugAudiograph.*\n?/gm, '');
+  code = '// date: ' + new Date().toISOString() + '\n\n' + code;
+  code = '// host: ' + document.location.hostname + '\n' + code;
+  const codeLines = code.split(/(?:\n|\r\n?)/);
+  const maxLineLength = codeLines.reduce((memo, line) => Math.max(memo, line.length), 0);
+
+  // https://mermaid.js.org/syntax/flowchart.html
+  let gd = '';
+  gd += '---\n';
+  gd += 'config:\n';
+  gd += '  flowchart:\n';
+  gd += '    wrappingWidth: ' + 14 * maxLineLength + '\n';
+  gd += '---\n';
+  gd += 'flowchart TB\n';
+  gd += '\tsubgraph AG[STRUDEL AUDIOGRAPH]\n';
+
+  // seed graph builder with all
+  // unconnected nodes
+  let lookup = [];
+  cache.forEach((v, k) => {
+    if (v.connect.length === 0) lookup.push(k);
+  });
+  const relations = [];
+  let curRelations;
+  const zombieCount = 0;
+  const sourceLoc = (stack) => {
+    if (stack === '@') return stack;
+    return stack.replace('@', '\n').replace('/superdough/', '/');
+  };
+  const label = (s) => {
+    const source = s.creation ? '\n' + sourceLoc(s.creation) : '';
+    let lb = '[' + '**' + s.type + '**' + source + ']';
+    if (s.ac === 'OfflineAudioContext') lb = '[' + lb + ']';
+    return lb;
+  };
+  const isConnectLeak = (s) => {
+    return (
+      ['AudioDestinationNode', 'AudioParam'].indexOf(s.type) === -1 &&
+      s.disconnectAll === 0 &&
+      s.connect.length > s.disconnectOne
+    );
+  };
+  const isStopLeak = (s) => {
+    return s.hasStop && s.stopCount === 0;
+  };
+  do {
+    curRelations = relations.length;
+    lookup.slice().forEach((n) => {
+      cache.forEach((v, k) => {
+        if (v.connect.indexOf(n) !== -1) {
+          if (lookup.indexOf(k) === -1) lookup.push(k);
+          gd += v.connect
+            .map((i) => {
+              if (lookup.indexOf(i) === -1) lookup.push(i);
+              if (relations.indexOf(k + '-' + i) === -1) {
+                relations.push(k + '-' + i);
+                return (
+                  '\t\tnode' +
+                  k +
+                  label(v) +
+                  ' -- ' +
+                  sourceLoc(v.where[0]) +
+                  ' --> node' +
+                  i +
+                  label(cache.get(i)) +
+                  '\n'
+                );
+              }
+            })
+            .join('');
+        }
+        if (k === n) {
+          gd += v.connect
+            .map((i) => {
+              if (lookup.indexOf(i) === -1) lookup.push(i);
+              if (relations.indexOf(k + '-' + i) === -1) {
+                relations.push(k + '-' + i);
+                return (
+                  '\t\tnode' +
+                  k +
+                  label(v) +
+                  ' -- ' +
+                  sourceLoc(v.where[0]) +
+                  ' --> node' +
+                  i +
+                  label(cache.get(i)) +
+                  '\n'
+                );
+              }
+            })
+            .join('');
+        }
+      });
+    });
+  } while (relations.length > curRelations /*&& lookup.length < 100*/);
+  // add orphan nodes
+  const inRelation = '-' + relations.join('-') + '-';
+  cache.forEach((v, k) => {
+    if (!inRelation.includes('-' + k + '-')) {
+      gd += '\t\tnode' + k + label(v) + '\n';
+    }
+  });
+
+  const codePlaceholder = 'm'.repeat(maxLineLength);
+  gd += '\tsubgraph LEGEND\n';
+  gd += '\t\tlegend1[in AudioContext]\n';
+  gd += '\t\tlegend2[[in OfflineAudioContext]]\n';
+  gd += '\t\tlegend3[not disconnected]\n';
+  gd += '\t\tlegend4[AudioParam]\n';
+  gd += '\t\tlegend5[AudioDestinationNode]\n';
+  gd += '\t\tlegend6[not stopped]\n';
+  gd += '\tend\n';
+  gd += '\tsubgraph CODE[Strudel Code]\n';
+  // we use a codePlaceholder to
+  // - avoid problems with special chars
+  // - stop mermaid to split lines on space with multiple tspans
+  // - force mermaid to prepare a sufficiently sized zone
+  gd += '\ncode[' + (codePlaceholder + '<br>').repeat(codeLines.length) + ']\n';
+  gd += '\tend\n';
+  gd += '\tend\n';
+  gd += '\tclassDef audioparam fill:#6f6;\n';
+  gd += '\tclassDef destination fill:#99f;\n';
+  gd += '\tclassDef connectleak fill:#f96,stroke:#f00,stroke-width:2px;\n';
+  gd += '\tclassDef stopleak fill:#f55,stroke:#f00,stroke-width:2px;\n';
+  gd += '\tclass legend3 connectleak;\n';
+  gd += '\tclass legend4 audioparam;\n';
+  gd += '\tclass legend5 destination;\n';
+  gd += '\tclass legend6 stopleak;\n';
+  cache.forEach((v, k) => {
+    if (isConnectLeak(v)) {
+      gd += '\tclass node' + k + ' connectleak;\n';
+    } else if (isStopLeak(v)) {
+      gd += '\tclass node' + k + ' stopleak;\n';
+    }
+    if (v.type === 'AudioParam') {
+      gd += '\tclass node' + k + ' audioparam;\n';
+    }
+    if (v.type === 'AudioDestinationNode') {
+      gd += '\tclass node' + k + ' destination;\n';
+    }
+  });
+  let { svg } = await mermaid.render('strudelSvgId', gd);
+
+  // put real code in code zone
+  let idx = 0;
+  const escapeHtml = (unsafe) => {
+    return unsafe
+      .replace(/&/g, '&amp;')
+      .replace(/</g, '&lt;')
+      .replace(/>/g, '&gt;')
+      .replace(/"/g, '&quot;')
+      .replace(/'/g, '&#039;');
+  };
+  svg = svg.replaceAll(codePlaceholder, () => escapeHtml(codeLines[idx++]));
+
+  // improve sizing on web page
+  svg = svg.replace(/max-width:\s[0-9.]*px;/i, 'height: 100%');
+  element.innerHTML = svg;
+
+  // align the code lines
+  let svgText = document.querySelector('[id^=flowchart-code] text');
+  svgText.setAttributeNS(null, 'style', 'text-anchor: start;');
+  const svgElement = document.querySelector('svg');
+  const svgLabel = document.querySelector('svg [id^=flowchart-code] .label');
+  const transformList = svgLabel.transform.baseVal;
+  const svgTransform = svgElement.createSVGTransform();
+  const tspans = Array.from(document.querySelectorAll('[id^=flowchart-code] tspan.text-inner-tspan'));
+  let tspansMaxLength = tspans.reduce((memo, tspan) => Math.max(memo, tspan.getComputedTextLength()), 0);
+  svgTransform.setTranslate(-tspansMaxLength / 2, 0);
+  transformList.appendItem(svgTransform);
+
+  let doPan = false;
+  let eventsHandler;
+  let panZoom;
+  let mousepos;
+
+  eventsHandler = {
+    haltEventListeners: ['mousedown', 'mousemove', 'mouseup'],
+    mouseDownHandler: function (ev) {
+      if (event.target.className == '[object SVGAnimatedString]') {
+        doPan = true;
+        mousepos = {
+          x: ev.clientX,
+          y: ev.clientY,
+        };
+      }
+    },
+    mouseMoveHandler: function (ev) {
+      if (doPan) {
+        panZoom.panBy({
+          x: ev.clientX - mousepos.x,
+          y: ev.clientY - mousepos.y,
+        });
+        mousepos = {
+          x: ev.clientX,
+          y: ev.clientY,
+        };
+        window.getSelection().removeAllRanges();
+      }
+    },
+    mouseUpHandler: function (ev) {
+      doPan = false;
+    },
+    init: function (options) {
+      options.svgElement.addEventListener('mousedown', this.mouseDownHandler, false);
+      options.svgElement.addEventListener('mousemove', this.mouseMoveHandler, false);
+      options.svgElement.addEventListener('mouseup', this.mouseUpHandler, false);
+    },
+    destroy: function (options) {
+      options.svgElement.removeEventListener('mousedown', this.mouseDownHandler, false);
+      options.svgElement.removeEventListener('mousemove', this.mouseMoveHandler, false);
+      options.svgElement.removeEventListener('mouseup', this.mouseUpHandler, false);
+    },
+  };
+  panZoom = svgPanZoom('#strudelSvgId', {
+    zoomEnabled: true,
+    controlIconsEnabled: true,
+    fit: 1,
+    center: 1,
+    zoomScaleSensitivity: 0.4,
+    customEventsHandler: eventsHandler,
+  });
+};
+
+const svgExport = async () => {
+  const a = document.createElement('a');
+  document.body.appendChild(a);
+  a.style = 'display: none';
+
+  const selector = '.strudel-mermaid';
+  const bbox = document.querySelector('svg g').getBBox();
+  let transform, style;
+  // clean pan-zoom viewport
+  const pzViewport = document.querySelector('.svg-pan-zoom_viewport');
+  if (pzViewport) {
+    transform = pzViewport.transform;
+    style = pzViewport.style;
+    pzViewport.setAttribute('transform', '');
+    pzViewport.style = '';
+  }
+
+  const spzMin = await fetch('https://cdn.jsdelivr.net/npm/svg-pan-zoom@3.6.2/dist/svg-pan-zoom.min.js').then((res) =>
+    res.text(),
+  );
+
+  const scriptContent = '<![CDATA[' + spzMin + ';svgPanZoom("svg");]]>';
+  // prepare svg
+  const content = document
+    .querySelector(selector)
+    .innerHTML.replaceAll('<br>', '<br/>')
+    // remove useless tags
+    .replace(/<g id="svg-pan-zoom.*<\/g>/, '<script>' + scriptContent + '</script>')
+    .replace(/<defs>.*<\/defs>/, '')
+    // give inkscape true sizes
+    .replace('width="100%"', 'width="' + bbox.width + '" height="' + bbox.height + '"');
+
+  // restore pan-zoom viewport
+  if (pzViewport) {
+    pzViewport.setAttribute('transform', transform);
+    pzViewport.style = style;
+  }
+
+  // trigger download
+  var blob = new Blob([content], { type: 'image/svg+xml' }),
+    url = window.URL.createObjectURL(blob);
+  a.href = url;
+  a.download = 'audiograph.svg';
+  a.click();
+  window.URL.revokeObjectURL(url);
+};
+
+const resetAudioOutput = function (audioid) {
+  // calling reset on SuperdoughAudioController
+  // will discard output nodes AND recreate them
+  // so we keep the same `cache` to handle the
+  // `disconnects` knowing that new nodes will be
+  // stricly after the current audioid.
+  // then we purge the old nodes from the `cache`
+  // to have a clean state
+
+  // make sure destination will be recreated in the
+  // cache
+  const destination = getAudioContext().destination;
+  if (destination._audioid) delete destination._audioid;
+
+  const sac = getSuperdoughAudioController();
+  sac.reset();
+  Array.from(cache.keys()).map((k) => {
+    if (k <= audioid) cache.delete(k);
+  });
+};
+
+const postProcessing = async function () {
+  hap_count = 0;
+  await drawDiagram();
+
+  resetAudioOutput(audioid);
+};
+
+const defaultOptions = {
+  StopAfterHapCount: 10,
+  hapsBatch: 0,
+  maxEdges: 10000,
+  maxTextSize: 200000,
+  audioAPIBreathingRoomSec: 5,
+};
+
+// `StopAfterHapCount` :
+//         The player will auto-stop after hap count have
+//         been played. when StopAfterHapCount = 0, it will
+//         continue playing until 'stop' is clicked
+// `audioAPIBreathingRoomSec` :
+//         how much time should we wait after 'stop' to let
+//         the audioAPI finish its tail of ondended calls
+// `hapsBatch` :
+//         the AudioGraph will be displayed every hapsBatch haps
+//         when hapsBatch = 0, AudioGraph will only be displayed
+//         after and auto-stop or after 'stop' is clicked
+//         In hapsBatch mode you will probably see a trailing of
+//         non disconnected notes on the graph because the audio
+//         API may have some lag disconnecting them
+//         cf also audioAPIBreathingRoomSec
+// `maxEdges`
+//         This is a mermaid.js config that forces a hard limit
+//         on the maximum number of Edges of a graph
+//         needs a reload to be taken into account
+// `maxTextSize`
+//         This is a mermaid.js config that forces a hard limit
+//         on the maximum text size of a graph definition
+//         needs a reload to be taken into account
+
+export const debugAudiograph = async (argOptions = {}) => {
+  const options = Object.assign({}, defaultOptions, argOptions);
+  const { StopAfterHapCount, hapsBatch, maxEdges, maxTextSize, audioAPIBreathingRoomSec } = options;
+  const sm = window.strudelMirror;
+  const code = sm.code;
+  if (!code.match(/await\s+debugAudiograph/)) {
+    throw new Error('you need to call `await debugAudiograph()` for audiograph to work');
+  }
+  const emptyOptions = /await\s+debugAudiograph\(\)/.exec(code);
+  if (emptyOptions) {
+    const cutCode = emptyOptions.index + emptyOptions[0].length - 1;
+    const codeOptions = JSON.stringify({ StopAfterHapCount: StopAfterHapCount }).replaceAll('"', '');
+    sm.setCode(code.slice(0, cutCode) + codeOptions + code.slice(cutCode));
+  }
+
+  if (window.audiograph === undefined) {
+    const ag = (window.audiograph = {});
+
+    toggleOrig = sm.toggle;
+
+    ////////////////////////////////////////
+    // step 1: web audio api instrumentation
+    ////////////////////////////////////////
+
+    // path AudioNode & AudioParam
+    // to give them lazy ids
+    // this captures both `ac.createGain`
+    // and `new GainNode(..)` patterns
+    lazyRegister(AudioNode);
+    lazyRegister(AudioParam);
+    lazyRegister(PeriodicWave);
+
+    const audioNodes = [
+      AudioBufferSourceNode,
+      AudioWorkletNode,
+      AnalyserNode,
+      BiquadFilterNode,
+      ChannelMergerNode,
+      ChannelSplitterNode,
+      ConstantSourceNode,
+      ConvolverNode,
+      DelayNode,
+      DynamicsCompressorNode,
+      GainNode,
+      IIRFilterNode,
+      OscillatorNode,
+      PannerNode,
+      StereoPannerNode,
+      WaveShaperNode,
+    ];
+    audioNodes.map((n) => {
+      if (n.prototype instanceof AudioScheduledSourceNode) {
+        const stopOrig = n.prototype.stop;
+        n.prototype.stop = function (...args) {
+          // stop called
+          const result = stopOrig.call(this, ...args);
+          const s = cache.get(this.audioid);
+          s.stopCount++;
+          return result;
+        };
+      }
+      audioNodeHook(n);
+    });
+
+    // patch BaseAudioContext factory methods
+    // to capture the source reference
+    Object.getOwnPropertyNames(BaseAudioContext.prototype)
+      .filter((n) => n.startsWith('create') && ['createBuffer'].indexOf(n) === -1)
+      .map((name) => {
+        const orig = BaseAudioContext.prototype[name];
+        BaseAudioContext.prototype[name] = function (...args) {
+          const result = orig.call(this, ...args);
+          const s = cache.get(result.audioid);
+          s.creation = stackTrace();
+          return result;
+        };
+      });
+
+    const connectOrig = AudioNode.prototype.connect;
+    AudioNode.prototype.connect = function (destination, ...args) {
+      const result = connectOrig.call(this, destination, ...args);
+      const s = cache.get(this.audioid);
+      s.connect.push(destination.audioid);
+      s.where.push(stackTrace());
+      return result;
+    };
+
+    const disconnectOrig = AudioNode.prototype.disconnect;
+    AudioNode.prototype.disconnect = function (destination, ...args) {
+      const result = disconnectOrig.call(this, destination, ...args);
+      const s = cache.get(this.audioid);
+      if (s.connect.length) {
+        if (destination) {
+          s.disconnectOne++;
+        } else {
+          s.disconnectAll++;
+        }
+      } else {
+        logger('WEIRD: node ' + this.audioid + 'called disconnect before any call to connect !');
+        //logger(new Error().stack);
+        console.log(cache);
+      }
+      return result;
+    };
+
+    // call reset 2 times to handle reload + 'play'
+    // the first reset's disconnect adds audioid tags on previous outputs
+    // that were not tagged (wrong cutoff)
+    resetAudioOutput(audioid);
+    // the second reset has the correct audioid cutoff
+    resetAudioOutput(audioid);
+
+    ////////////////////////////////////////
+    // step 2: Load external modules
+    ////////////////////////////////////////
+
+    const { default: mermaidModule } = await import(
+      'https://cdn.jsdelivr.net/npm/mermaid@11.12.1/dist/mermaid.esm.mjs'
+    );
+    mermaid = mermaidModule;
+
+    mermaid.initialize({
+      startOnLoad: false,
+      themeCSS: '.flowchart { height: 100%; }',
+      maxEdges: maxEdges,
+      maxTextSize: maxTextSize,
+      htmlLabels: false,
+      flowchart: {
+        htmlLabels: false,
+      },
+    });
+
+    const { default: svgPanZoomModule } = await import('https://esm.sh/svg-pan-zoom');
+    svgPanZoom = svgPanZoomModule;
+
+    //////////////////////////////////////////
+    // step 3: UI modifications
+    //////////////////////////////////////////
+
+    // add audiograph panel
+    if (!document.querySelector('.strudel-mermaid')) {
+      const mermaidDiv = document.createElement('div');
+      mermaidDiv.className = 'strudel-mermaid';
+      mermaidDiv.style = 'min-height: 600px; width: 60%';
+      const referenceNode = document.querySelector('#code');
+      referenceNode.parentNode.insertBefore(mermaidDiv, referenceNode.nextSibling);
+    }
+
+    // add svg export button
+    if (!document.querySelector('button[title=svg]')) {
+      const exportButton = document.createElement('button');
+      exportButton.innerHTML = '<span>ExportDiagram</span>';
+      exportButton.title = 'svg';
+      exportButton.onclick = svgExport;
+      const updateButton = document.querySelector('button[title=update]');
+      updateButton.parentNode.insertBefore(exportButton, updateButton);
+    }
+  }
+
+  if (!running) {
+    running = true;
+  }
+
+  if (hapsBatch === 0 || hap_count < hapsBatch) {
+    let msg = '';
+    msg += 'Recording activity...';
+    msg += '\npress stop to build diagram';
+    if (StopAfterHapCount) {
+      msg += '\nwill stop automatically in ' + Math.max(StopAfterHapCount - hap_count, 0) + ' haps';
+    }
+    await drawMessage(msg);
+  }
+
+  sm.toggle = async () => {
+    running = false;
+    sm.toggle = toggleOrig;
+    // schedule `toggle` on the js main loop
+    // to avoid interfering with any on-flight onTick
+    // not doing this can lead to a phase > 0 which will
+    // break the next start
+    setTimeout(sm.toggle.bind(sm), 0);
+    await drawMessage('please wait ' + audioAPIBreathingRoomSec + ' seconds\n' + 'the audio API is finishing its work');
+    setTimeout(postProcessing, audioAPIBreathingRoomSec * 1000);
+  };
+
+  /*global all*/
+  all((pat) =>
+    pat.onTrigger(async (hap, duration, cps, t) => {
+      hap_count++;
+      const key = Object.entries(hap.value)
+        .map((param) => param.join('/'))
+        .join('/');
+
+      // if we reached StopAfterHapCount, click 'stop'
+      if (StopAfterHapCount && hap_count > StopAfterHapCount) {
+        if (running) {
+          await sm.toggle();
+        }
+        // stop sending haps to superdough(...)
+        return;
+      }
+
+      await webaudioOutput(hap, t, hap.duration / cps, cps, t);
+
+      if (hapsBatch && hap_count % hapsBatch === 0) drawDiagram();
+    }),
+  );
+};
diff --git a/website/src/repl/components/panel/ExportTab.jsx b/website/src/repl/components/panel/ExportTab.jsx
new file mode 100644
index 000000000..9671ff1a3
--- /dev/null
+++ b/website/src/repl/components/panel/ExportTab.jsx
@@ -0,0 +1,197 @@
+import PlayCircleIcon from '@heroicons/react/20/solid/PlayCircleIcon';
+import cx from '@src/cx.mjs';
+import NumberInput from '@src/repl/components/NumberInput';
+import { useEffect, useState } from 'react';
+import { Textbox } from '../textbox/Textbox';
+import { getAudioContext } from '@strudel/webaudio';
+import XMarkIcon from '@heroicons/react/24/outline/XMarkIcon';
+
+function Checkbox({ label, value, onChange, disabled = false }) {
+  return (
+    <label className={cx(disabled && 'opacity-50')}>
+      <input disabled={disabled} type="checkbox" checked={value} onChange={onChange} />
+      {' ' + label}
+    </label>
+  );
+}
+
+function FormItem({ label, children, disabled }) {
+  return (
+    <div className="grid gap-2 w-full">
+      <label className={cx(disabled && 'opacity-50')}>{label}</label>
+      {children}
+    </div>
+  );
+}
+
+export default function ExportTab(Props) {
+  const { handleExport } = Props;
+
+  const [downloadName, setDownloadName] = useState('');
+  const [startCycle, setStartCycle] = useState(0);
+  const [endCycle, setEndCycle] = useState(1);
+  const [sampleRate, setSampleRate] = useState(48000);
+  const [multiChannelOrbits, setMultiChannelOrbits] = useState(true);
+  const [maxPolyphony, setMaxPolyphony] = useState(1024);
+  const [exporting, setExporting] = useState(false);
+  const [progress, setProgress] = useState(0);
+  const [length, setLength] = useState(1);
+
+  const refreshProgress = () => {
+    const audioContext = getAudioContext();
+    if (audioContext instanceof OfflineAudioContext) {
+      setProgress(audioContext.currentTime);
+      setLength(audioContext.length / sampleRate);
+      setTimeout(refreshProgress, 100);
+    }
+  };
+
+  return (
+    <>
+      <div className="text-foreground w-full p-4 space-y-4">
+        <FormItem label="File name" disabled={exporting}>
+          <Textbox
+            onBlur={(e) => {
+              setDownloadName(e.target.value);
+            }}
+            onChange={(v) => {
+              setDownloadName(v);
+            }}
+            disabled={exporting}
+            placeholder="Leave empty to use current date"
+            className={cx('placeholder:opacity-50', exporting && 'opacity-50 border-opacity-50')}
+            value={downloadName ?? ''}
+          />
+        </FormItem>
+        <div className="flex flex-row gap-4 w-full">
+          <FormItem label="Start cycle" disabled={exporting}>
+            <Textbox
+              min={1}
+              max={Infinity}
+              onBlur={(e) => {
+                let v = parseInt(e.target.value);
+                v = isNaN(v) ? 0 : Math.max(0, v);
+                setStartCycle(v);
+              }}
+              onChange={(v) => {
+                v = parseInt(v);
+                setStartCycle(v);
+              }}
+              type="number"
+              placeholder=""
+              disabled={exporting}
+              className={cx(exporting && 'opacity-50 border-opacity-50', 'w-full')}
+              value={startCycle ?? ''}
+            />
+          </FormItem>
+          <FormItem label="End cycle" disabled={exporting}>
+            <Textbox
+              min={1}
+              max={Infinity}
+              onBlur={(e) => {
+                let v = parseInt(e.target.value);
+                v = isNaN(v) ? Math.max(startCycle + 1, parseInt(v)) : v;
+                setEndCycle(v);
+              }}
+              onChange={(v) => {
+                v = parseInt(v);
+                setEndCycle(v);
+              }}
+              type="number"
+              placeholder=""
+              disabled={exporting}
+              className={cx(exporting && 'opacity-50 border-opacity-50', 'w-full')}
+              value={endCycle ?? ''}
+            />
+          </FormItem>
+        </div>
+        <div className="flex flex-row gap-4">
+          <FormItem label="Sample rate" disabled={exporting}>
+            <Textbox
+              min={1}
+              max={Infinity}
+              onBlur={(e) => {
+                let v = parseInt(e.target.value);
+                v = isNaN(v) ? 1 : Math.max(1, v);
+                setSampleRate(v);
+              }}
+              onChange={(v) => {
+                v = parseInt(v);
+                setSampleRate(v);
+              }}
+              type="number"
+              placeholder=""
+              disabled={exporting}
+              className={cx(exporting && 'opacity-50 border-opacity-50')}
+              value={sampleRate ?? ''}
+            />
+          </FormItem>
+          <FormItem label="Maximum polyphony" disabled={exporting}>
+            <Textbox
+              min={1}
+              max={Infinity}
+              onBlur={(e) => {
+                let v = parseInt(e.target.value);
+                v = isNaN(v) ? Math.max(1, parseInt(v)) : v;
+                setMaxPolyphony(v);
+              }}
+              onChange={(v) => {
+                v = Math.max(1, parseInt(v));
+                setMaxPolyphony(v);
+              }}
+              type="number"
+              placeholder=""
+              disabled={exporting}
+              className={cx(exporting && 'opacity-50 border-opacity-50')}
+              value={maxPolyphony ?? ''}
+            />
+          </FormItem>
+        </div>
+        <div>
+          <Checkbox
+            label="Multi Channel Orbits"
+            onChange={(cbEvent) => {
+              const val = cbEvent.target.checked;
+              setMultiChannelOrbits(val);
+            }}
+            disabled={exporting}
+            value={multiChannelOrbits}
+          />
+        </div>
+        <button
+          className={cx('bg-background p-2 w-full rounded-md hover:opacity-75 relative', exporting && 'opacity-50')}
+          disabled={exporting}
+          onClick={async () => {
+            setExporting(true);
+            setTimeout(refreshProgress, 2000);
+            const modal = document.getElementById('exportProgressModal');
+            modal.showModal();
+            await handleExport(startCycle, endCycle, sampleRate, maxPolyphony, multiChannelOrbits, downloadName)
+              .then(() => {
+                const modal = document.getElementById('exportProgressModal');
+                modal.close();
+              })
+              .finally(() => {
+                setExporting(false);
+                setProgress(0);
+                setLength(1);
+              });
+          }}
+        >
+          <div
+            className="absolute top-0 left-0 right-0 bottom-0 backdrop-invert"
+            style={{
+              width: `${(exporting ? 1 : 0) + (progress / length) * 99}%`,
+            }}
+          />
+          <span className="text-foreground">{exporting ? 'Exporting...' : 'Export to WAV'}</span>
+        </button>
+      </div>
+      <dialog
+        closedby={exporting ? 'none' : 'closerequest'}
+        id="exportProgressModal"
+        className="text-md bg-background text-foreground rounded-lg backdrop:bg-background backdrop:opacity-25"
+      />
+    </>
+  );
+}
diff --git a/website/src/repl/components/panel/Panel.jsx b/website/src/repl/components/panel/Panel.jsx
index b26c2edef..cfe90ae30 100644
--- a/website/src/repl/components/panel/Panel.jsx
+++ b/website/src/repl/components/panel/Panel.jsx
@@ -9,6 +9,7 @@ import { useLogger } from '../useLogger';
 import { WelcomeTab } from './WelcomeTab';
 import { PatternsTab } from './PatternsTab';
 import { ChevronLeftIcon, XMarkIcon } from '@heroicons/react/16/solid';
+import ExportTab from './ExportTab';
 
 const TAURI = typeof window !== 'undefined' && window.__TAURI__;
 
@@ -80,6 +81,7 @@ const tabNames = {
   patterns: 'patterns',
   sounds: 'sounds',
   reference: 'reference',
+  export: 'export',
   console: 'console',
   settings: 'settings',
 };
@@ -126,6 +128,8 @@ function PanelContent({ context, tab }) {
       return <SoundsTab />;
     case tabNames.reference:
       return <Reference />;
+    case tabNames.export:
+      return <ExportTab handleExport={context.handleExport} />;
     case tabNames.settings:
       return <SettingsTab started={context.started} />;
     case tabNames.files:
diff --git a/website/src/repl/tunes.mjs b/website/src/repl/tunes.mjs
index f1c72b12d..697e83c9d 100644
--- a/website/src/repl/tunes.mjs
+++ b/website/src/repl/tunes.mjs
@@ -393,6 +393,8 @@ samples({
   bass: { d2: 'https://cdn.freesound.org/previews/608/608286_13074022-lq.mp3' }
 })
 
+useRNG('legacy')
+
 stack(
   // bells
   n("0").euclidLegato(3,8)
@@ -430,6 +432,7 @@ export const festivalOfFingers3 = `// "Festival of fingers 3"
 // @by Felix Roos
 
 setcps(1)
+useRNG('legacy')
 
 n("[-7*3],0,2,6,[8 7]")
   .echoWith(
@@ -454,6 +457,8 @@ export const meltingsubmarine = `// "Melting submarine"
 // @by Felix Roos
 
 samples('github:tidalcycles/dirt-samples')
+useRNG('legacy')
+
 stack(
   s("bd:5,[~ <sd:1!3 sd:1(3,4,3)>],hh27(3,4,1)") // drums
   .speed(perlin.range(.7,.9)) // random sample speed variation
@@ -602,6 +607,9 @@ export const belldub = `// "Belldub"
 
 samples({ bell: {b4:'https://cdn.freesound.org/previews/339/339809_5121236-lq.mp3'}})
 // "Hand Bells, B, Single.wav" by InspectorJ (www.jshaw.co.uk) of Freesound.org
+
+useRNG('legacy')
+
 stack(
   // bass
   note("[0 ~] [2 [0 2]] [4 4*2] [[4 ~] [2 ~] 0@2]".scale('g1 dorian').superimpose(x=>x.add(.02)))
@@ -638,6 +646,7 @@ export const dinofunk = `// "Dinofunk"
 // @by Felix Roos
 
 setcps(1)
+useRNG('legacy')
 
 samples({bass:'https://cdn.freesound.org/previews/614/614637_2434927-hq.mp3',
 dino:{b4:'https://cdn.freesound.org/previews/316/316403_5123851-hq.mp3'}})
@@ -666,6 +675,8 @@ export const sampleDemo = `// "Sample demo"
 // @license CC BY-NC-SA 4.0 https://creativecommons.org/licenses/by-nc-sa/4.0/
 // @by Felix Roos
 
+useRNG('legacy')
+
 stack(
   // percussion
   s("[woodblock:1 woodblock:2*2] snare_rim:0,gong/8,brakedrum:1(3,8),~@3 cowbell:3")
@@ -684,6 +695,8 @@ export const holyflute = `// "Holy flute"
 // @license CC BY-NC-SA 4.0 https://creativecommons.org/licenses/by-nc-sa/4.0/
 // @by Felix Roos
 
+useRNG('legacy')
+
 "c3 eb3(3,8) c4/2 g3*2"
 .superimpose(
   x=>x.slow(2).add(12),
@@ -699,6 +712,8 @@ export const flatrave = `// "Flatrave"
 // @license CC BY-NC-SA 4.0 https://creativecommons.org/licenses/by-nc-sa/4.0/
 // @by Felix Roos
 
+useRNG('legacy')
+
 stack(
   s("bd*2,~ [cp,sd]").bank('RolandTR909'),
   
@@ -727,6 +742,8 @@ export const amensister = `// "Amensister"
 
 samples('github:tidalcycles/dirt-samples')
 
+useRNG('legacy')
+
 stack(
   // amen
   n("0 1 2 3 4 5 6 7")
@@ -834,6 +851,8 @@ export const arpoon = `// "Arpoon"
 // @license CC BY-NC-SA 4.0 https://creativecommons.org/licenses/by-nc-sa/4.0/
 // @by Felix Roos
 
+useRNG('legacy')
+
 samples('github:tidalcycles/dirt-samples')
 
 n("[0,3] 2 [1,3] 2".fast(3).lastOf(4, fast(2))).clip(2)
diff --git a/website/src/repl/useReplContext.jsx b/website/src/repl/useReplContext.jsx
index 8dcb6b754..0fbd89e38 100644
--- a/website/src/repl/useReplContext.jsx
+++ b/website/src/repl/useReplContext.jsx
@@ -9,11 +9,13 @@ import { getDrawContext } from '@strudel/draw';
 import { evaluate, transpiler } from '@strudel/transpiler';
 import {
   getAudioContextCurrentTime,
+  renderPatternAudio,
   webaudioOutput,
   resetGlobalEffects,
   resetLoadedSounds,
   initAudioOnFirstClick,
   resetDefaults,
+  initAudio,
 } from '@strudel/webaudio';
 import { setVersionDefaultsFrom } from './util.mjs';
 import { StrudelMirror, defaultSettings } from '@strudel/codemirror';
@@ -36,6 +38,7 @@ import { getRandomTune, initCode, loadModules, shareCode } from './util.mjs';
 import './Repl.css';
 import { setInterval, clearInterval } from 'worker-timers';
 import { getMetadata } from '../metadata_parser';
+import { debugAudiograph } from './audiograph';
 
 const { latestCode, maxPolyphony, audioDeviceName, multiChannelOrbits } = settingsMap.get();
 let modulesLoading, presets, drawContext, clearCanvas, audioReady;
@@ -129,6 +132,7 @@ export function useReplContext() {
       bgFill: false,
     });
     window.strudelMirror = editor;
+    window.debugAudiograph = debugAudiograph;
 
     // init settings
     initCode().then(async (decoded) => {
@@ -207,6 +211,30 @@ export function useReplContext() {
   const handleEvaluate = () => {
     editorRef.current.evaluate();
   };
+
+  const handleExport = async (begin, end, sampleRate, maxPolyphony, multiChannelOrbits, downloadName = undefined) => {
+    await editorRef.current.evaluate(false);
+    editorRef.current.repl.scheduler.stop();
+    await renderPatternAudio(
+      editorRef.current.repl.state.pattern,
+      editorRef.current.repl.scheduler.cps,
+      begin,
+      end,
+      sampleRate,
+      maxPolyphony,
+      multiChannelOrbits,
+      downloadName,
+    ).finally(async () => {
+      const { latestCode, maxPolyphony, audioDeviceName, multiChannelOrbits } = settingsMap.get();
+      await initAudio({
+        latestCode,
+        maxPolyphony,
+        audioDeviceName,
+        multiChannelOrbits,
+      });
+      editorRef.current.repl.scheduler.stop();
+    });
+  };
   const handleShuffle = async () => {
     const patternData = await getRandomTune();
     const code = patternData.code;
@@ -235,6 +263,7 @@ export function useReplContext() {
     handleShuffle,
     handleShare,
     handleEvaluate,
+    handleExport,
     init,
     error,
     editorRef,