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stable version

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This commit is contained in:
Raphael Forment 2023-09-05 09:56:49 +02:00
parent 37842d4fbd
commit 16c8dcf788
2 changed files with 44 additions and 52 deletions
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28
packages/superdough/helpers.mjs
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@ -66,19 +66,33 @@ export const getADSR = (attack, decay, sustain, release, velocity, begin, end) =
return gainNode;
};
export function createFilter(context, type, frequency, Q, attack, decay, sustain, release, fenvmod, t) {
export const getParamADSR = (param, attack, decay, sustain, release, velocity, begin, end) => {
param.setValueAtTime(0, begin);
param.linearRampToValueAtTime(velocity, begin + attack);
param.linearRampToValueAtTime(sustain * velocity, begin + attack + decay);
param.setValueAtTime(sustain * velocity, end);
param.linearRampToValueAtTime(0, end + release - 0.1);
};
export function createFilter(context, type, frequency, Q, attack, decay, sustain, release, fenv, t) {
const filter = context.createBiquadFilter();
filter.type = type;
filter.frequency.value = frequency;
filter.Q.value = Q;
// Apply ADSR to filter frequency
if (fenvmod > 0) {
const sustainFreq = sustain * frequency;
filter.frequency.linearRampToValueAtTime(frequency * fenvmod, t + attack);
filter.frequency.linearRampToValueAtTime(sustainFreq, t + attack + decay);
filter.frequency.setValueAtTime(sustainFreq, end);
filter.frequency.linearRampToValueAtTime(frequency, end + release);
if (fenv > 0) {
const envelope = getParamADSR(
filter.frequency,
attack,
decay,
sustain,
release,
frequency * fenv > 22000 ? 22000 : frequency * fenv,
t,
t + attack + decay + release,
);
return filter;
}
return filter;