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https://codeberg.org/uzu/strudel
synced 2026-07-31 11:31:48 -04:00
Don't tag when scale fails, allow mixed sharps and flats, simplify scale function
This commit is contained in:
@@ -2574,8 +2574,8 @@ export const { chunkBack, chunkback } = register(
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* @returns Pattern
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* @example
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* "<0 8> 1 2 3 4 5 6 7"
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* .fastChunk(4, x => x.color('red')).slow(2)
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* .scale("C2:major").note()
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* .fastChunk(4, x => x.color('red')).slow(2)
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*/
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export const { fastchunk, fastChunk } = register(
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['fastchunk', 'fastChunk'],
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@@ -796,7 +796,7 @@ describe('Pattern', () => {
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});
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});
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describe('apply', () => {
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(it('Can apply a function', () => {
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it('Can apply a function', () => {
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expect(sequence('a', 'b').apply(fast(2)).firstCycle()).toStrictEqual(sequence('a', 'b').fast(2).firstCycle());
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}),
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it('Can apply a pattern of functions', () => {
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@@ -804,7 +804,7 @@ describe('Pattern', () => {
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expect(sequence('a', 'b').apply(fast(2), fast(3)).firstCycle()).toStrictEqual(
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sequence('a', 'b').fast(2, 3).firstCycle(),
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);
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}));
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});
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});
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describe('layer', () => {
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it('Can layer up multiple functions', () => {
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@@ -7,8 +7,8 @@ This program is free software: you can redistribute it and/or modify it under th
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import { logger } from './logger.mjs';
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// returns true if the given string is a note
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export const isNoteWithOctave = (name) => /^[a-gA-G][#bs]*[0-9]$/.test(name);
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export const isNote = (name) => /^[a-gA-G][#bsf]*-?[0-9]?$/.test(name);
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export const isNoteWithOctave = (name) => /^[a-gA-G][#bsf]*[0-9]*$/.test(name);
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export const isNote = (name) => /^[a-gA-G][#bsf]*-?[0-9]*$/.test(name);
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export const tokenizeNote = (note) => {
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if (typeof note !== 'string') {
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return [];
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@@ -23,6 +23,10 @@ export const tokenizeNote = (note) => {
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const chromas = { c: 0, d: 2, e: 4, f: 5, g: 7, a: 9, b: 11 };
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const accs = { '#': 1, b: -1, s: 1, f: -1 };
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export const getAccidentalsOffset = (accidentals) => {
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return accidentals?.split('').reduce((o, char) => o + accs[char], 0) || 0;
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};
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// turns the given note into its midi number representation
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export const noteToMidi = (note, defaultOctave = 3) => {
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const [pc, acc, oct = defaultOctave] = tokenizeNote(note);
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@@ -30,7 +34,7 @@ export const noteToMidi = (note, defaultOctave = 3) => {
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throw new Error('not a note: "' + note + '"');
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}
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const chroma = chromas[pc.toLowerCase()];
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const offset = acc?.split('').reduce((o, char) => o + accs[char], 0) || 0;
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const offset = getAccidentalsOffset(acc);
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return (Number(oct) + 1) * 12 + chroma + offset;
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};
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export const midiToFreq = (n) => {
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@@ -16,13 +16,17 @@ export const tokenizeNote = (note) => {
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const chromas = { c: 0, d: 2, e: 4, f: 5, g: 7, a: 9, b: 11 };
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const accs = { '#': 1, b: -1, s: 1, f: -1 };
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export const getAccidentalsOffset = (accidentals) => {
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return accidentals?.split('').reduce((o, char) => o + accs[char], 0) || 0;
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};
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export const noteToMidi = (note, defaultOctave = 3) => {
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const [pc, acc, oct = defaultOctave] = tokenizeNote(note);
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if (!pc) {
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throw new Error('not a note: "' + note + '"');
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}
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const chroma = chromas[pc.toLowerCase()];
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const offset = acc?.split('').reduce((o, char) => o + accs[char], 0) || 0;
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const offset = getAccidentalsOffset(acc);
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return (Number(oct) + 1) * 12 + chroma + offset;
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};
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export const midiToFreq = (n) => {
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@@ -61,13 +61,6 @@ describe('tonal', () => {
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.firstCycleValues.map((h) => h.note),
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).toEqual(['B2', 'Eb3', 'A2', 'G3', 'F3']);
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});
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it('produces silence for mixed sharps and flats', () => {
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expect(
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n(seq('0b#', '1#b', '2#b#'))
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.scale('C major')
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.firstCycleValues.map((h) => h.note),
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).toEqual([]);
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});
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it('snaps notes (upwards) to scale', () => {
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const inputNotes = ['Cb', 'Eb', 'G', 'A#', 'Bb'];
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const expectedNotes = ['B2', 'E3', 'G3', 'B3', 'B3'];
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+46
-50
@@ -5,9 +5,8 @@ This program is free software: you can redistribute it and/or modify it under th
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*/
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import { Note, Interval, Scale } from '@tonaljs/tonal';
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import { register, _mod, silence, logger, pure, isNote } from '@strudel/core';
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import { register, _mod, logger, isNote, noteToMidi, removeUndefineds, getAccidentalsOffset } from '@strudel/core';
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import { stepInNamedScale, nearestNumberIndex } from './tonleiter.mjs';
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import { noteToMidi } from '../core/util.mjs';
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const octavesInterval = (octaves) => (octaves <= 0 ? -1 : 1) + octaves * 7 + 'P';
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@@ -185,17 +184,15 @@ function _convertStepToNumberAndOffset(step) {
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step = String(step);
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// Check to see if the step matches the expected format:
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// - A number (possibly negative)
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// - Some number of sharps or flats (but not both)
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const match = /^(-?\d+)(#+|b+)?$/.exec(step);
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// - Some number of sharps or flats
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const match = /^(-?\d+)([#bsf]*)$/.exec(step);
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if (!match) {
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throw new Error(`invalid scale step "${step}", expected number or integer with optional # b suffixes`);
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}
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asNumber = Number(match[1]);
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// These decorations will determine the semitone offset based on the number of
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// sharps or flats
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const decorations = match[2] || '';
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offset = decorations[0] === '#' ? decorations.length : -decorations.length;
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const accidentals = match[2] || '';
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offset = getAccidentalsOffset(accidentals);
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}
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return [asNumber, offset];
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}
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@@ -226,7 +223,7 @@ function _getNearestScaleNote(scaleName, note, preferHigher = true) {
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* Turns numbers into notes in the scale (zero indexed) or quantizes notes to a scale.
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*
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* When describing notes via numbers, note that negative numbers can be used to wrap backwards
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* in the scale as well as sharps or flats (but not both) to produce notes outside of the scale.
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* in the scale as well as sharps or flats to produce notes outside of the scale.
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*
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* Also sets scale for other scale operations, like {@link Pattern#scaleTranspose}.
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*
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@@ -254,7 +251,6 @@ function _getNearestScaleNote(scaleName, note, preferHigher = true) {
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* @example
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* note("C1*16").transpose(irand(36)).scale('Cb2 major').scaleTranspose(3)
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*/
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export const scale = register(
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'scale',
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function (scale, pat) {
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@@ -262,47 +258,47 @@ export const scale = register(
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if (Array.isArray(scale)) {
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scale = scale.flat().join(' ');
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}
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return (
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pat
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.fmap((value) => {
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const isObject = typeof value === 'object';
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// If value is a pure value, place it on `n` so that we interpret it as a scale
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// degree
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value = isObject ? value : { n: value };
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if ('note' in value) {
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const note = _getNearestScaleNote(scale, value.note);
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return pure({ ...value, note });
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} else if ('n' in value || 'value' in value) {
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const step = value.n ?? value.value;
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delete value.n; // remove n so it won't cause trouble
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if (isNote(step)) {
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// legacy..
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return pure(step);
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}
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try {
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const [number, offset] = _convertStepToNumberAndOffset(step);
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let note;
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if (value.anchor) {
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note = stepInNamedScale(number, scale, value.anchor);
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} else {
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note = scaleStep(number, scale);
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}
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if (offset != 0) note = Note.transpose(note, Interval.fromSemitones(offset));
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value = pure(isObject ? { ...value, note } : note);
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} catch (err) {
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logger(`[tonal] ${err.message}`, 'error');
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return silence;
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}
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return value;
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}
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throw new Error(
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`Invalid value format for 'scale'. Value must contain 'n' or 'note' but received ${Object.keys(value)}`,
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return pat.withHaps((haps) => {
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haps = haps.map((hap) => {
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let hVal = hap.value;
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const isObject = typeof hVal === 'object';
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// If hVal is a pure value, place it on `n` so that we interpret it as a scale degree
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hVal = isObject ? hVal : { n: hVal };
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const { note, n, value, ...otherValues } = hVal;
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const noteOrStep = note ?? n ?? value;
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if (noteOrStep === undefined) {
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logger(
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`[tonal] Invalid value format for 'scale'. Value must contain n, note, or value but received keys [${Object.keys(hVal).join(', ')}]`,
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'error',
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);
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})
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.outerJoin()
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// legacy:
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.withHap((hap) => hap.setContext({ ...hap.context, scale }))
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);
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return hap; // pass the value through unchanged
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}
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let scaleNote;
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if (isNote(noteOrStep)) {
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// Note case (quantize to scale)
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scaleNote = _getNearestScaleNote(scale, noteOrStep);
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hap.value = { ...otherValues, note: scaleNote };
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} else {
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// Step case (convert to note in scale)
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try {
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const [number, offset] = _convertStepToNumberAndOffset(noteOrStep);
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if (otherValues.anchor) {
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scaleNote = stepInNamedScale(number, scale, otherValues.anchor);
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} else {
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scaleNote = scaleStep(number, scale);
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}
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if (offset != 0) scaleNote = Note.transpose(scaleNote, Interval.fromSemitones(offset));
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} catch (err) {
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logger(`[tonal] ${err.message}`, 'error');
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return; // will be removed
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}
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}
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hap.value = isObject ? { ...otherValues, note: scaleNote } : scaleNote;
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// Tag with scale for downsteam scale-aware operations
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return hap.setContext({ ...hap.context, scale });
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});
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return removeUndefineds(haps);
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});
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},
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true,
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true, // preserve step count
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@@ -3838,8 +3838,8 @@ exports[`runs examples > example "fast" example index 0 1`] = `
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exports[`runs examples > example "fastChunk" example index 0 1`] = `
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[
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"[ 0/1 → 1/4 | color:red note:0 ]",
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"[ 1/4 → 1/2 | color:red note:1 ]",
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"[ 0/1 → 1/4 | note:C2 color:red ]",
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"[ 1/4 → 1/2 | note:D2 color:red ]",
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"[ 1/2 → 3/4 | note:E2 ]",
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"[ 3/4 → 1/1 | note:F2 ]",
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"[ 1/1 → 5/4 | note:G2 ]",
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@@ -3848,8 +3848,8 @@ exports[`runs examples > example "fastChunk" example index 0 1`] = `
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"[ 7/4 → 2/1 | note:C3 ]",
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"[ 2/1 → 9/4 | note:D3 ]",
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"[ 9/4 → 5/2 | note:D2 ]",
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"[ 5/2 → 11/4 | color:red note:2 ]",
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"[ 11/4 → 3/1 | color:red note:3 ]",
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"[ 5/2 → 11/4 | note:E2 color:red ]",
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"[ 11/4 → 3/1 | note:F2 color:red ]",
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"[ 3/1 → 13/4 | note:G2 ]",
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"[ 13/4 → 7/2 | note:A2 ]",
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"[ 7/2 → 15/4 | note:B2 ]",
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@@ -18,8 +18,8 @@
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--docsearch-modal-background: var(--background);
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--docsearch-muted-color: color-mix(in srgb, var(--foreground), #fff 30%);
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--docsearch-key-gradient: var(--foreground);
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--docsearch-key-shadow:
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inset 0 -2px 0 0 var(--gutterForeground), inset 0 0 1px 1px var(--foreground), 0 1px 2px 1px var(--gutterBackground);
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--docsearch-key-shadow: inset 0 -2px 0 0 var(--gutterForeground), inset 0 0 1px 1px var(--foreground),
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0 1px 2px 1px var(--gutterBackground);
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}
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.dark {
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--docsearch-muted-color: color-mix(in srgb, var(--foreground), #000 30%);
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