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use fenv to scale above base cutoff?

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This commit is contained in:
Felix Roos 2023-09-08 02:27:28 +02:00
parent 9e4c548c69
commit 606dcc8cc3
1 changed files with 9 additions and 7 deletions
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16
packages/superdough/helpers.mjs
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@ -66,12 +66,13 @@ export const getADSR = (attack, decay, sustain, release, velocity, begin, end) =
return gainNode; return gainNode;
}; };
export const getParamADSR = (param, attack, decay, sustain, release, max, begin, end) => { export const getParamADSR = (param, attack, decay, sustain, release, min, max, begin, end) => {
param.setValueAtTime(0, begin); const range = max - min;
param.linearRampToValueAtTime(max, begin + attack); param.setValueAtTime(min, begin);
param.linearRampToValueAtTime(sustain * max, begin + attack + decay); param.linearRampToValueAtTime(min + range, begin + attack);
param.setValueAtTime(sustain * max, end); param.linearRampToValueAtTime(min + sustain * range, begin + attack + decay);
param.linearRampToValueAtTime(0, end + release); param.setValueAtTime(min + sustain * range, end);
param.linearRampToValueAtTime(min, end + release);
}; };
export function createFilter(context, type, frequency, Q, attack, decay, sustain, release, fenv, start, end) { export function createFilter(context, type, frequency, Q, attack, decay, sustain, release, fenv, start, end) {
@ -87,7 +88,8 @@ export function createFilter(context, type, frequency, Q, attack, decay, sustain
decay, decay,
sustain, sustain,
release, release,
Math.min(frequency * fenv, 20000), frequency,
Math.min(frequency + 200 * 2 ** fenv, 20000),
start, start,
end + release, end + release,
); );