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negative fenv values now stay in the same range as positives

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This commit is contained in:
Felix Roos 2024-01-13 00:26:16 +01:00
parent f17459fdc3
commit 6f3b2fa66b
1 changed files with 5 additions and 3 deletions
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8
packages/superdough/helpers.mjs
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@ -111,9 +111,11 @@ export function createFilter(context, type, frequency, Q, att, dec, sus, rel, fe
if (hasEnvelope !== undefined) {
fenv = nanFallback(fenv, 1, true);
fanchor = nanFallback(fanchor, 0, true);
const offset = fenv * fanchor;
const min = clamp(2 ** -offset * frequency, 0, 20000);
const max = clamp(2 ** (fenv - offset) * frequency, 0, 20000);
const fenvAbs = Math.abs(fenv);
const offset = fenvAbs * fanchor;
let min = clamp(2 ** -offset * frequency, 0, 20000);
let max = clamp(2 ** (fenvAbs - offset) * frequency, 0, 20000);
if (fenv < 0) [min, max] = [max, min];
getParamADSR(filter.frequency, attack, decay, sustain, release, min, max, start, end, curve);
return filter;
}