hacklab/strudel
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

sounds onset and offset can be triggered independently

Browse source 
+ sounds tab now supports mousedown / mouseup to listen
This commit is contained in:
Felix Roos 2023-03-09 08:35:20 +01:00
parent cee08ea67d
commit 65e48c05f0
6 changed files with 103 additions and 48 deletions
Download patch file Download diff file Expand all files Collapse all files

50
packages/webaudio/sampler.mjs
View file

@ -1,6 +1,6 @@
import { logger, toMidi, valueToMidi } from '@strudel.cycles/core';
import { getAudioContext, setSound } from './index.mjs';
import { getADSR } from './helpers.mjs';
import { getEnvelope } from './helpers.mjs';
const bufferCache = {}; // string: Promise<ArrayBuffer>
const loadCache = {}; // string: Promise<ArrayBuffer>
@ -150,7 +150,7 @@ export const samples = async (sampleMap, baseUrl = sampleMap._base || '', option
}),
);
}
setSound(key, (options) => onTriggerSample(options, value), {
setSound(key, (t, hapValue) => onTriggerSample(t, hapValue, value), {
type: 'sample',
samples: value,
baseUrl,
@ -161,8 +161,7 @@ export const samples = async (sampleMap, baseUrl = sampleMap._base || '', option
const cutGroups = [];
export async function onTriggerSample(options, bank) {
const { hap, duration: hapDuration, t, cps } = options;
export async function onTriggerSample(t, value, bank) {
const {
s,
freq,
@ -176,10 +175,10 @@ export async function onTriggerSample(options, bank) {
speed = 1, // sample playback speed
begin = 0,
end = 1,
} = hap.value;
} = value;
const ac = getAudioContext();
// destructure adsr here, because the default should be different for synths and samples
const { attack = 0.001, decay = 0.001, sustain = 1, release = 0.001 } = hap.value;
const { attack = 0.001, decay = 0.001, sustain = 1, release = 0.001 } = value;
// load sample
if (speed === 0) {
// no playback
@ -208,34 +207,41 @@ export async function onTriggerSample(options, bank) {
bufferSource.playbackRate.value = Math.abs(speed) * bufferSource.playbackRate.value;
if (unit === 'c') {
// are there other units?
bufferSource.playbackRate.value = bufferSource.playbackRate.value * bufferSource.buffer.duration * cps;
bufferSource.playbackRate.value = bufferSource.playbackRate.value * bufferSource.buffer.duration * 1; //cps;
}
const shouldClip = /* soundfont || */ clip;
let duration = shouldClip ? hapDuration : bufferSource.buffer.duration / bufferSource.playbackRate.value;
// "The computation of the offset into the sound is performed using the sound buffer's natural sample rate,
// rather than the current playback rate, so even if the sound is playing at twice its normal speed,
// the midway point through a 10-second audio buffer is still 5."
const offset = begin * duration * bufferSource.playbackRate.value;
duration = (end - begin) * duration;
if (loop) {
const time = t + nudge;
const offset = begin * bufferSource.buffer.duration;
bufferSource.start(time, offset);
const bufferDuration = bufferSource.buffer.duration / bufferSource.playbackRate.value;
/*if (loop) {
// TODO: idea for loopBegin / loopEnd
// if one of [loopBegin,loopEnd] is <= 1, interpret it as normlized
// if [loopBegin,loopEnd] is bigger >= 1, interpret it as sample number
// this will simplify perfectly looping things, while still keeping the normalized option
// the only drawback is that looping between samples 0 and 1 is not possible (which is not real use case)
bufferSource.loop = true;
bufferSource.loopStart = offset;
bufferSource.loopEnd = offset + duration;
duration = loop * duration;
}
const time = t + nudge;
bufferSource.start(time, offset);
}*/
const { node: envelope, stop: releaseEnvelope } = getEnvelope(attack, decay, sustain, release, 1, t);
bufferSource.connect(envelope);
if (cut !== undefined) {
cutGroups[cut]?.stop(time); // fade out?
cutGroups[cut] = bufferSource;
}
//chain.push(bufferSource);
bufferSource.stop(t + duration + release);
const adsr = getADSR(attack, decay, sustain, release, 1, time, time + duration);
bufferSource.connect(adsr);
//chain.push(adsr);
return adsr;
const stop = (endTime) => {
let releaseTime = endTime;
if (!clip) {
releaseTime = t + (end - begin) * bufferDuration;
}
bufferSource.stop(releaseTime + release);
releaseEnvelope(releaseTime);
};
return { node: envelope, stop };
}
/*const getSoundfontKey = (s) => {