adding modulators

packages/superdough/helpers.mjs

@@ -186,3 +186,61 @@ export function getVibratoOscillator(param, value, t) {
     return vibratoOscillator;
   }
 }
+const mod = (freq, range = 1, type = 'sine') => {
+  const ctx = getAudioContext();
+  const osc = ctx.createOscillator();
+  osc.type = type;
+  osc.frequency.value = freq;
+  osc.start();
+  const g = new GainNode(ctx, { gain: range });
+  osc.connect(g); // -range, range
+  return { node: g, stop: (t) => osc.stop(t) };
+};
+const fm = (frequencyparam, harmonicityRatio, modulationIndex, wave = 'sine') => {
+  const carrfreq = frequencyparam.value;
+  const modfreq = carrfreq * harmonicityRatio;
+  const modgain = modfreq * modulationIndex;
+  return mod(modfreq, modgain, wave);
+};
+export function applyFM(param, value) {
+  const {
+    fmh: fmHarmonicity = 1,
+    fmi: fmModulationIndex,
+    fmenv: fmEnvelopeType = 'exp',
+    fmattack: fmAttack,
+    fmdecay: fmDecay,
+    fmsustain: fmSustain,
+    fmrelease: fmRelease,
+    fmvelocity: fmVelocity,
+    fmwave: fmWaveform = 'sine',
+    duration,
+    begin,
+  } = value;
+
+  const ac = getAudioContext();
+  if (fmModulationIndex) {
+    const envGain = ac.createGain();
+    const { node: modulator } = fm(param, fmHarmonicity, fmModulationIndex, fmWaveform);
+    if (![fmAttack, fmDecay, fmSustain, fmRelease, fmVelocity].find((v) => v !== undefined)) {
+      // no envelope by default
+      modulator.connect(param.frequency);
+    } else {
+      const [attack, decay, sustain, release] = getADSRValues([fmAttack, fmDecay, fmSustain, fmRelease]);
+      const holdEnd = begin + duration;
+      getParamADSR(
+        envGain.gain,
+        attack,
+        decay,
+        sustain,
+        release,
+        0,
+        1,
+        begin,
+        holdEnd,
+        fmEnvelopeType === 'exp' ? 'exponential' : 'linear',
+      );
+      modulator.connect(envGain);
+      envGain.connect(param);
+    }
+  }
+}

packages/superdough/synth.mjs

@@ -1,6 +1,6 @@
 import { clamp, midiToFreq, noteToMidi } from './util.mjs';
 import { registerSound, getAudioContext, getWorklet } from './superdough.mjs';
-import { gainNode, getADSRValues, getParamADSR, getPitchEnvelope, getVibratoOscillator } from './helpers.mjs';
+import { applyFM, gainNode, getADSRValues, getParamADSR, getPitchEnvelope, getVibratoOscillator } from './helpers.mjs';
 import { getNoiseMix, getNoiseOscillator } from './noise.mjs';
 
 const mod = (freq, range = 1, type = 'sine') => {
@@ -21,9 +21,6 @@ const fm = (osc, harmonicityRatio, modulationIndex, wave = 'sine') => {
   return mod(modfreq, modgain, wave);
 };
 
-const waveforms = ['triangle', 'square', 'sawtooth', 'sine'];
-const noises = ['pink', 'white', 'brown', 'crackle'];
-
 const getFrequencyFromValue = (value) => {
   let { note, freq } = value;
   note = note || 36;
@@ -38,6 +35,62 @@ const getFrequencyFromValue = (value) => {
   return Number(freq);
 };
 
+const waveforms = ['triangle', 'square', 'sawtooth', 'sine'];
+const noises = ['pink', 'white', 'brown', 'crackle'];
+
+const applyModulators = (node, value) => {
+  let {
+    n: partials,
+    note,
+    freq,
+    noise = 0,
+    // fm
+    fmh: fmHarmonicity = 1,
+    fmi: fmModulationIndex,
+    fmenv: fmEnvelopeType = 'exp',
+    fmattack: fmAttack,
+    fmdecay: fmDecay,
+    fmsustain: fmSustain,
+    fmrelease: fmRelease,
+    fmvelocity: fmVelocity,
+    fmwave: fmWaveform = 'sine',
+    duration,
+    begin: t,
+  } = value;
+
+  const ac = getAudioContext();
+  if (fmModulationIndex) {
+    let envGain = ac.createGain();
+    const { node: modulator, stop } = fm(node, fmHarmonicity, fmModulationIndex, fmWaveform);
+    if (![fmAttack, fmDecay, fmSustain, fmRelease, fmVelocity].find((v) => v !== undefined)) {
+      // no envelope by default
+      modulator.connect(node.frequency);
+    } else {
+      const [attack, decay, sustain, release] = getADSRValues([fmAttack, fmDecay, fmSustain, fmRelease]);
+      const holdEnd = t + duration;
+      getParamADSR(
+        envGain.gain,
+        attack,
+        decay,
+        sustain,
+        release,
+        0,
+        1,
+        t,
+        holdEnd,
+        fmEnvelopeType === 'exp' ? 'exponential' : 'linear',
+      );
+      modulator.connect(envGain);
+      envGain.connect(node.frequency);
+    }
+  }
+
+  getVibratoOscillator(node.detune, value, t);
+  getPitchEnvelope(node.detune, value, t, t + duration);
+
+  return node;
+};
+
 export function registerSynthSounds() {
   [...waveforms].forEach((s) => {
     registerSound(
@@ -102,15 +155,18 @@ export function registerSynthSounds() {
           frequency,
           begin,
           end,
-          detune: detune * 0.1,
+          freqspread: detune * 0.1,
           voices: clamp(unison, 0, 100),
-          spread: clamp(spread, 0, 1),
+          panspread: clamp(spread, 0, 1),
         },
         {
           outputChannelCount: [2],
         },
       );
-
+      // console.log(node.parameters.get('frequency'));
+      getPitchEnvelope(node.parameters.get('detune'), value, begin, holdend);
+      getVibratoOscillator(node.parameters.get('detune'), value, begin);
+      // applyFM(node.parameters.get('frequency'));
       const envGain = gainNode(1);
       node = node.connect(envGain);
 

packages/superdough/worklets.mjs

@@ -169,16 +169,21 @@ class SuperSawOscillatorProcessor extends AudioWorkletProcessor {
       },
 
       {
-        name: 'spread',
+        name: 'panspread',
         defaultValue: 0.4,
         min: 0,
         max: 1,
       },
       {
-        name: 'detune',
+        name: 'freqspread',
         defaultValue: 0.2,
         min: 0,
       },
+      {
+        name: 'detune',
+        defaultValue: 0,
+        min: 0,
+      },
 
       {
         name: 'voices',
@@ -194,23 +199,25 @@ class SuperSawOscillatorProcessor extends AudioWorkletProcessor {
     if (currentTime >= params.end[0]) {
       return false;
     }
-    const frequency = params.frequency[0];
+    let frequency = params.frequency[0];
+    //apply detune in cents
+    frequency = frequency * Math.pow(2, params.detune[0] / 1200);
 
     const output = outputs[0];
     const voices = params.voices[0];
-    const detune = params.detune[0];
-    let spread = params.spread[0];
-    spread = spread * 0.5 + 0.5;
+    const freqspread = params.freqspread[0];
+    let panspread = params.panspread[0];
+    panspread = panspread * 0.5 + 0.5;
     const gainAdjustment = 1;
 
     for (let n = 0; n < voices; n++) {
       let adj = 0;
       const isOdd = n % 2 === 1;
       if (n > 0) {
-        adj = isOdd ? n * detune : -((n - 1) * detune);
+        adj = isOdd ? n * freqspread : -((n - 1) * freqspread);
       }
       const freq = Math.min(16744, Math.max(1, frequency + adj * 0.01 * frequency));
-      const balance = isOdd ? 1 - spread : spread;
+      const balance = isOdd ? 1 - panspread : panspread;
       const dt = freq / sampleRate;
 
       for (let i = 0; i < output[0].length; i++) {