Merge remote-tracking branch 'upstream/main' into sampler

packages/superdough/helpers.mjs

@@ -1,4 +1,5 @@
 import { getAudioContext } from './superdough.mjs';
+import { clamp } from './util.mjs';
 
 export function gainNode(value) {
   const node = getAudioContext().createGain();
@@ -66,10 +67,48 @@ export const getADSR = (attack, decay, sustain, release, velocity, begin, end) =
   return gainNode;
 };
 
-export const getFilter = (type, frequency, Q) => {
-  const filter = getAudioContext().createBiquadFilter();
-  filter.type = type;
-  filter.frequency.value = frequency;
-  filter.Q.value = Q;
-  return filter;
+export const getParamADSR = (param, attack, decay, sustain, release, min, max, begin, end) => {
+  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));
 };
+
+export function createFilter(
+  context,
+  type,
+  frequency,
+  Q,
+  attack,
+  decay,
+  sustain,
+  release,
+  fenv,
+  start,
+  end,
+  fanchor = 0.5,
+) {
+  const filter = context.createBiquadFilter();
+  filter.type = type;
+  filter.Q.value = Q;
+  filter.frequency.value = frequency;
+
+  // Apply ADSR to filter frequency
+  if (!isNaN(fenv) && fenv !== 0) {
+    const offset = fenv * fanchor;
+
+    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;
+  }
+
+  return filter;
+}

packages/superdough/package.json

@@ -1,6 +1,6 @@
 {
   "name": "superdough",
-  "version": "0.9.6",
+  "version": "0.9.7",
   "description": "simple web audio synth and sampler intended for live coding. inspired by superdirt and webdirt.",
   "main": "index.mjs",
   "type": "module",

packages/superdough/superdough.mjs

@@ -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';
 
@@ -177,14 +177,32 @@ export const superdough = async (value, deadline, hapDuration) => {
     bank,
     source,
     gain = 0.8,
+    // filters
+    ftype = '12db',
+    fanchor = 0.5,
     // low pass
     cutoff,
+    lpenv,
+    lpattack = 0.01,
+    lpdecay = 0.01,
+    lpsustain = 1,
+    lprelease = 0.01,
     resonance = 1,
     // high pass
+    hpenv,
     hcutoff,
+    hpattack = 0.01,
+    hpdecay = 0.01,
+    hpsustain = 1,
+    hprelease = 0.01,
     hresonance = 1,
     // band pass
+    bpenv,
     bandf,
+    bpattack = 0.01,
+    bpdecay = 0.01,
+    bpsustain = 1,
+    bprelease = 0.01,
     bandq = 1,
     //
     coarse,
@@ -239,11 +257,76 @@ 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) {
+    let lp = () =>
+      createFilter(
+        ac,
+        'lowpass',
+        cutoff,
+        resonance,
+        lpattack,
+        lpdecay,
+        lpsustain,
+        lprelease,
+        lpenv,
+        t,
+        t + hapDuration,
+        fanchor,
+      );
+    chain.push(lp());
+    if (ftype === '24db') {
+      chain.push(lp());
+    }
+  }
+
+  if (hcutoff !== undefined) {
+    let hp = () =>
+      createFilter(
+        ac,
+        'highpass',
+        hcutoff,
+        hresonance,
+        hpattack,
+        hpdecay,
+        hpsustain,
+        hprelease,
+        hpenv,
+        t,
+        t + hapDuration,
+        fanchor,
+      );
+    chain.push(hp());
+    if (ftype === '24db') {
+      chain.push(hp());
+    }
+  }
+
+  if (bandf !== undefined) {
+    let bp = () =>
+      createFilter(
+        ac,
+        'bandpass',
+        bandf,
+        bandq,
+        bpattack,
+        bpdecay,
+        bpsustain,
+        bprelease,
+        bpenv,
+        t,
+        t + hapDuration,
+        fanchor,
+      );
+    chain.push(bp());
+    if (ftype === '24db') {
+      chain.push(bp());
+    }
+  }
+
+  if (vowel !== undefined) {
+    const vowelFilter = ac.createVowelFilter(vowel);
+    chain.push(vowelFilter);
+  }
 
   // effects
   coarse !== undefined && chain.push(getWorklet(ac, 'coarse-processor', { coarse }));