[perf] fix connect leak when .noise() is in the mix

packages/superdough/helpers.mjs

@@ -262,7 +262,15 @@ export function drywet(dry, wet, wetAmount = 0) {
   let mix = ac.createGain();
   dry_gain.connect(mix);
   wet_gain.connect(mix);
-  return mix;
+  return {
+    node: mix,
+    onended: () => {
+      dry_gain.disconnect(mix);
+      wet_gain.disconnect(mix);
+      dry.disconnect(dry_gain);
+      wet.disconnect(wet_gain);
+    },
+  };
 }
 
 let curves = ['linear', 'exponential'];
@@ -297,6 +305,10 @@ export function getVibratoOscillator(param, value, t) {
     gain.gain.value = vibmod * 100;
     vibratoOscillator.connect(gain);
     gain.connect(param);
+    vibratoOscillator.onended = () => {
+      gain.disconnect(param);
+      vibratoOscillator.disconnect(gain);
+    };
     vibratoOscillator.start(t);
     return vibratoOscillator;
   }

packages/superdough/noise.mjs

@@ -65,8 +65,9 @@ export function getNoiseOscillator(type = 'white', t, density = 0.02) {
 export function getNoiseMix(inputNode, wet, t) {
   const noiseOscillator = getNoiseOscillator('pink', t);
   const noiseMix = drywet(inputNode, noiseOscillator.node, wet);
+  noiseOscillator.node.onended = () => noiseMix.onended();
   return {
-    node: noiseMix,
+    node: noiseMix.node,
     stop: (time) => noiseOscillator?.stop(time),
   };
 }

packages/superdough/synth.mjs

@@ -48,19 +48,17 @@ export function registerSynthSounds() {
           [0.001, 0.05, 0.6, 0.01],
         );
 
-        let sound = getOscillator(s, t, value);
-        let { node: o, stop, triggerRelease } = sound;
-
         // turn down
         const g = gainNode(0.3);
 
-        const { duration } = value;
-
-        o.onended = () => {
-          o.disconnect();
+        let sound = getOscillator(s, t, value, () => {
           g.disconnect();
           onended();
-        };
+        });
+
+        let { node: o, stop, triggerRelease } = sound;
+
+        const { duration } = value;
 
         const envGain = gainNode(1);
         let node = o.connect(g).connect(envGain);
@@ -460,7 +458,7 @@ export function waveformN(partials, phases, type) {
 }
 
 // expects one of waveforms as s
-export function getOscillator(s, t, value) {
+export function getOscillator(s, t, value, onended) {
   const { duration, noise = 0 } = value;
   const partials = value.partials ?? value.n;
   let o;
@@ -482,7 +480,6 @@ export function getOscillator(s, t, value) {
   }
   // set frequency
   o.frequency.value = getFrequencyFromValue(value);
-  o.start(t);
 
   let vibratoOscillator = getVibratoOscillator(o.detune, value, t);
 
@@ -495,6 +492,12 @@ export function getOscillator(s, t, value) {
     noiseMix = getNoiseMix(o, noise, t);
   }
 
+  o.onended = () => {
+    noiseMix?.node.disconnect();
+    onended();
+  };
+  o.start(t);
+
   return {
     node: noiseMix?.node || o,
     stop: (time) => {