vibrato for soundfonts

+ add getVibratoOscillator helper

packages/soundfonts/fontloader.mjs

@@ -5,6 +5,7 @@ import {
   getParamADSR,
   getADSRValues,
   getPitchEnvelope,
+  getVibratoOscillator,
 } from '@strudel.cycles/webaudio';
 import gm from './gm.mjs';
 
@@ -155,6 +156,8 @@ export function registerSoundfonts() {
         getParamADSR(node.gain, attack, decay, sustain, release, 0, 0.3, time, holdEnd, 'linear');
         let envEnd = holdEnd + release + 0.01;
 
+        // vibrato
+        let vibratoOscillator = getVibratoOscillator(bufferSource.detune, value, time);
         // pitch envelope
         if (value.penv) {
           getPitchEnvelope(bufferSource.detune, value, time, holdEnd);
@@ -164,6 +167,7 @@ export function registerSoundfonts() {
         const stop = (releaseTime) => {};
         bufferSource.onended = () => {
           bufferSource.disconnect();
+          vibratoOscillator?.stop();
           node.disconnect();
           onended();
         };

packages/superdough/helpers.mjs

@@ -157,3 +157,19 @@ export function getPitchEnvelope(param, value, t, holdEnd) {
     getParamADSR(param, pattack, pdecay, psustain, prelease, 0, cents, t, holdEnd, 'linear');
   }
 }
+
+export function getVibratoOscillator(param, value, t) {
+  const { vibmod = 0.5, vib } = value;
+  let vibratoOscillator;
+  if (vib > 0) {
+    vibratoOscillator = getAudioContext().createOscillator();
+    vibratoOscillator.frequency.value = vib;
+    const gain = getAudioContext().createGain();
+    // Vibmod is the amount of vibrato, in semitones
+    gain.gain.value = vibmod * 100;
+    vibratoOscillator.connect(gain);
+    gain.connect(param);
+    vibratoOscillator.start(t);
+    return vibratoOscillator;
+  }
+}

packages/superdough/sampler.mjs

@@ -1,6 +1,6 @@
 import { noteToMidi, valueToMidi, getSoundIndex } from './util.mjs';
 import { getAudioContext, registerSound } from './index.mjs';
-import { getADSRValues, getParamADSR, getPitchEnvelope } from './helpers.mjs';
+import { getADSRValues, getParamADSR, getPitchEnvelope, getVibratoOscillator } from './helpers.mjs';
 import { logger } from './logger.mjs';
 
 const bufferCache = {}; // string: Promise<ArrayBuffer>
@@ -244,8 +244,6 @@ export async function onTriggerSample(t, value, onended, bank, resolveUrl) {
     loopEnd = 1,
     end = 1,
     duration,
-    vib,
-    vibmod = 0.5,
   } = value;
   // load sample
   if (speed === 0) {
@@ -263,17 +261,7 @@ export async function onTriggerSample(t, value, onended, bank, resolveUrl) {
   const bufferSource = await getSampleBufferSource(s, n, note, speed, freq, bank, resolveUrl);
 
   // vibrato
-  let vibratoOscillator;
-  if (vib > 0) {
-    vibratoOscillator = getAudioContext().createOscillator();
-    vibratoOscillator.frequency.value = vib;
-    const gain = getAudioContext().createGain();
-    // Vibmod is the amount of vibrato, in semitones
-    gain.gain.value = vibmod * 100;
-    vibratoOscillator.connect(gain);
-    gain.connect(bufferSource.detune);
-    vibratoOscillator.start(0);
-  }
+  let vibratoOscillator = getVibratoOscillator(bufferSource.detune, value, t);
 
   // asny stuff above took too long?
   if (ac.currentTime > t) {

packages/superdough/synth.mjs

@@ -1,6 +1,6 @@
 import { midiToFreq, noteToMidi } from './util.mjs';
 import { registerSound, getAudioContext } from './superdough.mjs';
-import { gainNode, getADSRValues, getParamADSR, getPitchEnvelope } from './helpers.mjs';
+import { gainNode, getADSRValues, getParamADSR, getPitchEnvelope, getVibratoOscillator } from './helpers.mjs';
 import { getNoiseMix, getNoiseOscillator } from './noise.mjs';
 
 const mod = (freq, range = 1, type = 'sine') => {
@@ -110,8 +110,6 @@ export function getOscillator(s, t, value) {
     n: partials,
     note,
     freq,
-    vib = 0,
-    vibmod = 0.5,
     noise = 0,
     // fm
     fmh: fmHarmonicity = 1,
@@ -181,17 +179,7 @@ export function getOscillator(s, t, value) {
   }
 
   // Additional oscillator for vibrato effect
-  let vibratoOscillator;
-  if (vib > 0) {
-    vibratoOscillator = getAudioContext().createOscillator();
-    vibratoOscillator.frequency.value = vib;
-    const gain = getAudioContext().createGain();
-    // Vibmod is the amount of vibrato, in semitones
-    gain.gain.value = vibmod * 100;
-    vibratoOscillator.connect(gain);
-    gain.connect(o.detune);
-    vibratoOscillator.start(t);
-  }
+  let vibratoOscillator = getVibratoOscillator(o.detune, value, t);
 
   // pitch envelope
   if (value.penv) {