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improve response

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This commit is contained in:
Jade Rowland 2023-12-16 00:30:35 -05:00
parent 88f677e910
commit 96e0cce2d2
2 changed files with 26 additions and 39 deletions
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34
packages/superdough/helpers.mjs
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@ -71,14 +71,17 @@ export const getADSR = (attack, decay, sustain, release, velocity, begin, end) =
};
export const getParamADSR = (param, attack, decay, sustain, release, min, max, begin, end) => {
// let phase = begin;
const range = max - min;
const peak = min + range;
const sustainLevel = min + sustain * range;
param.setValueAtTime(min, begin);
param.linearRampToValueAtTime(peak, begin + attack);
param.linearRampToValueAtTime(sustainLevel, begin + attack + decay);
// param.setValueAtTime(sustainLevel, end);
param.linearRampToValueAtTime(min, end + Math.max(release, 0.1));
param.exponentialRampToValueAtTime(peak, begin + attack);
param.exponentialRampToValueAtTime(sustainLevel, begin + attack + decay);
//stop current envelope ramp at event end, and begin release ramp
console.log(param);
param.cancelAndHoldAtTime(end);
param.exponentialRampToValueAtTime(min, end + Math.max(release, 0.1));
};
export function getCompressor(ac, threshold, ratio, knee, attack, release) {
@ -91,11 +94,14 @@ export function getCompressor(ac, threshold, ratio, knee, attack, release) {
};
return new DynamicsCompressorNode(ac, options);
}
// changes the default values of the envelope based on what parameters the user has defined
// so it behaves more like you would expect/familiar as other synthesis tools
// ex: sound(val).decay(val) will behave as a decay only envelope. sound(val).attack(val).decay(val) will behave like an "ad" env, etc.
const envmin = 0.001;
export const getADSRValues = (params, defaultValues = [envmin, envmin, 1, envmin]) => {
const [a, d, s, r] = params;
const [defA, defD, defS, defR] = defaultValues;
console.log(a, d, s, r);
if (a == null && d == null && s == null && r == null) {
return defaultValues;
}
@ -103,20 +109,8 @@ export const getADSRValues = (params, defaultValues = [envmin, envmin, 1, envmin
return [a ?? envmin, d ?? envmin, sustain, r ?? envmin];
};
export function createFilter(
context,
type,
frequency,
Q,
attack,
decay,
sustain,
release,
fenv,
start,
end,
fanchor = 0.5,
) {
export function createFilter(context, type, frequency, Q, att, dec, sus, rel, fenv, start, end, fanchor = 0.5) {
const [attack, decay, sustain, release] = getADSRValues([att, dec, sus, rel], [0.01, 0.01, 1, 0.01]);
const filter = context.createBiquadFilter();
filter.type = type;
filter.Q.value = Q;
@ -129,8 +123,6 @@ export function createFilter(
const min = clamp(2 ** -offset * frequency, 0, 20000);
const max = clamp(2 ** (fenv - offset) * frequency, 0, 20000);
// console.log('min', min, 'max', max);
getParamADSR(filter.frequency, attack, decay, sustain, release, min, max, start, end);
return filter;
}