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Envelope filter and filter order

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This commit is contained in:
Raphael Forment 2023-09-04 04:56:45 +02:00
parent abaeb52b7c
commit ec8616a515
2 changed files with 49 additions and 9 deletions
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14
packages/superdough/helpers.mjs
View File

@ -66,10 +66,18 @@ export const getADSR = (attack, decay, sustain, release, velocity, begin, end) =
return gainNode;
};
export const getFilter = (type, frequency, Q) => {
const filter = getAudioContext().createBiquadFilter();
export function createFilter(context, type, frequency, Q, curve, to, over, t) {
const filter = context.createBiquadFilter();
filter.type = type;
filter.frequency.value = frequency;
filter.Q.value = Q;
if (to !== null && over !== null) {
if (curve === 'lin') {
filter.frequency.linearRampToValueAtTime(to, t + over);
} else {
filter.frequency.exponentialRampToValueAtTime(to, t + over);
}
}
return filter;
};
}

44
packages/superdough/superdough.mjs
View File

@ -9,7 +9,7 @@ import './reverb.mjs';
import './vowel.mjs';
import { clamp } from './util.mjs';
import workletsUrl from './worklets.mjs?url';
import { getFilter, gainNode } from './helpers.mjs';
import { createFilter, gainNode } from './helpers.mjs';
import { map } from 'nanostores';
import { logger } from './logger.mjs';
@ -177,6 +177,11 @@ export const superdough = async (value, deadline, hapDuration) => {
bank,
source,
gain = 0.8,
// filters
order = 12,
to,
filtenv = 'lin',
over,
// low pass
cutoff,
resonance = 1,
@ -239,11 +244,37 @@ export const superdough = async (value, deadline, hapDuration) => {
// gain stage
chain.push(gainNode(gain));
// filters
cutoff !== undefined && chain.push(getFilter('lowpass', cutoff, resonance));
hcutoff !== undefined && chain.push(getFilter('highpass', hcutoff, hresonance));
bandf !== undefined && chain.push(getFilter('bandpass', bandf, bandq));
vowel !== undefined && chain.push(ac.createVowelFilter(vowel));
if (cutoff !== undefined) {
const filter1 = createFilter(ac, 'lowpass', cutoff, resonance, filtenv, to || cutoff, over || hapDuration, t);
chain.push(filter1);
if (order === 24) {
const filter2 = createFilter(ac, 'lowpass', cutoff, resonance, filtenv, to || cutoff, over || hapDuration, t);
chain.push(filter2);
}
}
if (hcutoff !== undefined) {
const filter1 = createFilter(ac, 'highpass', hcutoff, hresonance, filtenv, to || hcutoff, over || hapDuration, t);
chain.push(filter1);
if (order === 24) {
const filter2 = createFilter(ac, 'highpass', hcutoff, hresonance, filtenv, to || hcutoff, over || hapDuration, t);
chain.push(filter2);
}
}
if (bandf !== undefined) {
const filter1 = createFilter(ac, 'bandpass', bandf, bandq, filtenv, to || bandf, over || hapDuration, t);
chain.push(filter1);
if (order === 24) {
const filter2 = createFilter(ac, 'bandpass', bandf, bandq, filtenv, to || bandf, over || hapDuration, t);
chain.push(filter2);
}
}
if (vowel !== undefined) {
const vowelFilter = ac.createVowelFilter(vowel);
chain.push(vowelFilter);
}
// effects
coarse !== undefined && chain.push(getWorklet(ac, 'coarse-processor', { coarse }));
@ -282,6 +313,7 @@ export const superdough = async (value, deadline, hapDuration) => {
analyserSend = effectSend(post, analyserNode, analyze);
}
console.log(chain);
// connect chain elements together
chain.slice(1).reduce((last, current) => last.connect(current), chain[0]);