diff --git a/packages/superdough/modulators.mjs b/packages/superdough/modulators.mjs
index ea9067102..7d119a06b 100644
--- a/packages/superdough/modulators.mjs
+++ b/packages/superdough/modulators.mjs
@@ -62,7 +62,10 @@ const getTargetParamsForControl = (control, nodes, subControl) => {
   const lookupKey = subControl ? `${control}_${subControl}` : control;
   const targetInfo = getControlData(lookupKey) ?? getControlData(control);
   if (!targetInfo) {
-    errorLogger(new Error(`Could not find control data for target '${control}'`), 'superdough');
+    errorLogger(
+      new Error(`Could not find control data for target '${control}'. It may not be modulatable.`),
+      'superdough',
+    );
     return { targetParams: [], paramName: control };
   }
   const paramName = targetInfo.param;
diff --git a/packages/superdough/superdough.mjs b/packages/superdough/superdough.mjs
index 7546bfab4..2e46b2d7e 100644
--- a/packages/superdough/superdough.mjs
+++ b/packages/superdough/superdough.mjs
@@ -597,6 +597,7 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
       delaysync = getDefaultValue('delaysync'),
       delaytime,
       stretch = getDefaultValue('stretch'),
+      i = getDefaultValue('i'),
     } = fx;
     gain = applyGainCurve(nanFallback(gain, 1));
     shapevol = applyGainCurve(shapevol);
@@ -744,9 +745,9 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
     }
 
     if (fx.vowel !== undefined) {
-      const vowelFilter = ac.createVowelFilter(fx.vowel);
-      fxNodes['vowel'] = [vowelFilter];
-      chain.connect(vowelFilter);
+      const vowelNode = ac.createVowelFilter(fx.vowel);
+      fxNodes['vowel'] = vowelNode.filters;
+      chain.connect(vowelNode);
     }
 
     // effects
@@ -839,7 +840,7 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
       chain.audioNodes.push(lfo);
     }
     // delay
-    if (delay > 0 && delaytime > 0 && delayfeedback > 0) {
+    if (key !== 'main' && delay > 0 && delaytime > 0 && delayfeedback > 0) {
       const dry = gainNode(1);
       delayfeedback = clamp(delayfeedback, 0, 0.98);
       const delayNode = ac.createFeedbackDelay(1, delaytime, delayfeedback);
@@ -856,7 +857,7 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
       fxNodes['delay_mix'] = [wetDelay];
     }
     // reverb
-    if (fx.room > 0) {
+    if (key !== 'main' && fx.room > 0) {
       let roomIR;
       if (fx.ir !== undefined) {
         let url;
@@ -864,7 +865,7 @@ export const superdough = async (value, t, hapDuration, cps = 0.5, cycle = 0.5)
         if (Array.isArray(sample)) {
           url = sample.data.samples[fx.i % sample.data.samples.length];
         } else if (typeof sample === 'object') {
-          url = Object.values(sample.data.samples).flat()[fx.i % Object.values(sample.data.samples).length];
+          url = Object.values(sample.data.samples).flat()[i % Object.values(sample.data.samples).length];
         }
         roomIR = await loadBuffer(url, ac, fx.ir, 0);
       }
diff --git a/packages/superdough/superdoughdata.mjs b/packages/superdough/superdoughdata.mjs
index 2dac194f1..e43df9eef 100644
--- a/packages/superdough/superdoughdata.mjs
+++ b/packages/superdough/superdoughdata.mjs
@@ -87,7 +87,7 @@ const CONTROL_TARGETS = {
   compressorRelease: { node: 'compressor', param: 'release' },
 
   // PHASER
-  phaserrate: { node: 'phaser_lfo', param: 'rate' },
+  phaserrate: { node: 'phaser_lfo', param: 'frequency' },
   phasersweep: { node: 'phaser_lfo', param: 'depth' },
   phasercenter: { node: 'phaser', param: 'frequency' },
   phaserdepth: { node: 'phaser', param: 'Q' },
diff --git a/packages/superdough/vowel.mjs b/packages/superdough/vowel.mjs
index bfc1c9fcd..8ecbf9d5c 100644
--- a/packages/superdough/vowel.mjs
+++ b/packages/superdough/vowel.mjs
@@ -1,3 +1,5 @@
+import { releaseAudioNode } from './helpers.mjs';
+
 // credits to webdirt: https://github.com/dktr0/WebDirt/blob/41342e81d6ad694a2310d491fef7b7e8b0929efe/js-src/Graph.js#L597
 export var vowelFormant = {
   a: { freqs: [660, 1120, 2750, 3000, 3350], gains: [1, 0.5012, 0.0708, 0.0631, 0.0126], qs: [80, 90, 120, 130, 140] },
@@ -46,7 +48,8 @@ if (typeof GainNode !== 'undefined') {
       }
       const { gains, qs, freqs } = vowelFormant[letter];
       this.makeupGain = ac.createGain();
-      this.audioNodes = [];
+      this.filters = [];
+      this.gains = [];
       for (let i = 0; i < 5; i++) {
         const gain = ac.createGain();
         gain.gain.value = gains[i];
@@ -56,9 +59,9 @@ if (typeof GainNode !== 'undefined') {
         filter.frequency.value = freqs[i];
         super.connect(filter);
         filter.connect(gain);
-        this.audioNodes.push(filter);
+        this.filters.push(filter);
         gain.connect(this.makeupGain);
-        this.audioNodes.push(gain);
+        this.gains.push(gain);
       }
       this.makeupGain.gain.value = 8; // how much makeup gain to add?
       return this;
@@ -67,11 +70,13 @@ if (typeof GainNode !== 'undefined') {
       this.makeupGain.connect(target);
     }
     disconnect() {
-      this.makeupGain.disconnect();
-      this.audioNodes.forEach((n) => n.disconnect());
+      releaseAudioNode(this.makeupGain);
+      this.filters.forEach(releaseAudioNode);
+      this.gains.forEach(releaseAudioNode);
       super.disconnect();
       this.makeupGain = null;
-      this.audioNodes = null;
+      this.filters = null;
+      this.gains = null;
     }
   }