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rudimentary sample map loading (doughsamples)

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Felix Roos 2025-06-09 11:07:57 +02:00
parent d1b6b6be85
commit 3ac0fdf619
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3 changed files with 126 additions and 162 deletions
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19
packages/supradough/dough.mjs
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@ -402,7 +402,7 @@ export class BufferPlayer {
buffer; // Float32Array
sampleRate;
pos = 0;
sampleFreq = 261.626; // middle c
sampleFreq = note2freq();
constructor(buffer, sampleRate) {
this.buffer = buffer;
this.sampleRate = sampleRate;
@ -411,7 +411,7 @@ export class BufferPlayer {
if (this.pos >= this.buffer.length) {
return 0;
}
const speed = ((freq / this.sampleFreq) * this.sampleRate) / SAMPLE_RATE;
const speed = ((freq / this.sampleFreq) * SAMPLE_RATE) / this.sampleRate;
let s = this.buffer[Math.floor(this.pos)];
this.pos = this.pos + speed;
return s;
@ -458,6 +458,7 @@ let shapes = {
};
const defaultDefaultValues = {
note: 48,
s: 'triangle',
gain: 1,
postgain: 1,
@ -505,23 +506,19 @@ const note2midi = (note, defaultOctave = 3) => {
oct = Number(oct || defaultOctave);
return (oct + 1) * 12 + chroma + offset;
};
const getFrequency = (value) => {
let { note, freq } = value;
note = note || 36;
const midi2freq = (midi) => Math.pow(2, (midi - 69) / 12) * 440;
const note2freq = (note) => {
note = note || getDefaultValue('note');
if (typeof note === 'string') {
note = note2midi(note, 3); // e.g. c3 => 48
}
if (!freq && typeof note === 'number') {
freq = Math.pow(2, (note - 69) / 12) * 440;
}
return Number(freq);
return midi2freq(note);
};
export class DoughVoice {
out = [0, 0];
constructor(value) {
value.freq = getFrequency(value);
value.freq ??= note2freq(value.note);
let $ = this;
Object.assign($, value);
$.s = $.s ?? getDefaultValue('s');