diff --git a/packages/superdough/README.md b/packages/superdough/README.md
index 4d670ac6..ac46f69e 100644
--- a/packages/superdough/README.md
+++ b/packages/superdough/README.md
@@ -161,5 +161,6 @@ Then just make sure your first call of `superdough` happens after a click of som
 
 ## Credits
 
+- [ZZFX](https://github.com/KilledByAPixel/ZzFX) used for synths starting with z
 - [SuperDirt](https://github.com/musikinformatik/SuperDirt)
 - [WebDirt](https://github.com/dktr0/WebDirt)
diff --git a/packages/superdough/package.json b/packages/superdough/package.json
index 159ea21d..d82448d6 100644
--- a/packages/superdough/package.json
+++ b/packages/superdough/package.json
@@ -36,7 +36,6 @@
     "vite": "^4.3.3"
   },
   "dependencies": {
-    "nanostores": "^0.8.1",
-    "zzfx": "^1.2.0"
+    "nanostores": "^0.8.1"
   }
 }
diff --git a/packages/superdough/zzfx.mjs b/packages/superdough/zzfx.mjs
index 352a88a2..4e6774bd 100644
--- a/packages/superdough/zzfx.mjs
+++ b/packages/superdough/zzfx.mjs
@@ -1,4 +1,4 @@
-import { ZZFX } from 'zzfx';
+//import { ZZFX } from 'zzfx';
 import { midiToFreq, noteToMidi } from './util.mjs';
 import { registerSound, getAudioContext } from './superdough.mjs';
 
@@ -82,7 +82,7 @@ export const getZZFX = (value, t, duration) => {
   const readableParams = Object.fromEntries(paramOrder.map((param, i) => [param, params[i]]));
   console.log(readableParams);
 
-  const samples = ZZFX.buildSamples(...params);
+  const samples = /* ZZFX. */ buildSamples(...params);
   const context = getAudioContext();
   const buffer = context.createBuffer(1, samples.length, context.sampleRate);
   buffer.getChannelData(0).set(samples);
@@ -98,7 +98,7 @@ export function registerZZFXSounds() {
   console.log('registerZZFXSounds');
   ['zsine', 'zsaw', 'ztri', 'ztan', 'znoise'].forEach((wave) => {
     registerSound(wave, (t, value, onended) => {
-      const duration = 0.2;
+      const duration = 0.3;
       const { node: o } = getZZFX({ s: wave, ...value }, t, duration);
       o.onended = () => {
         o.disconnect();
@@ -111,3 +111,122 @@ export function registerZZFXSounds() {
     });
   });
 }
+
+// https://github.com/KilledByAPixel/ZzFX/blob/master/ZzFX.js#L85C5-L180C6
+// changes: replaced this.volume with 1 + using sampleRate from getAudioContext()
+function buildSamples(
+  volume = 1,
+  randomness = 0.05,
+  frequency = 220,
+  attack = 0,
+  sustain = 0,
+  release = 0.1,
+  shape = 0,
+  shapeCurve = 1,
+  slide = 0,
+  deltaSlide = 0,
+  pitchJump = 0,
+  pitchJumpTime = 0,
+  repeatTime = 0,
+  noise = 0,
+  modulation = 0,
+  bitCrush = 0,
+  delay = 0,
+  sustainVolume = 1,
+  decay = 0,
+  tremolo = 0,
+) {
+  // init parameters
+  let PI2 = Math.PI * 2,
+    sampleRate = getAudioContext().sampleRate,
+    sign = (v) => (v > 0 ? 1 : -1),
+    startSlide = (slide *= (500 * PI2) / sampleRate / sampleRate),
+    startFrequency = (frequency *= ((1 + randomness * 2 * Math.random() - randomness) * PI2) / sampleRate),
+    b = [],
+    t = 0,
+    tm = 0,
+    i = 0,
+    j = 1,
+    r = 0,
+    c = 0,
+    s = 0,
+    f,
+    length;
+
+  // scale by sample rate
+  attack = attack * sampleRate + 9; // minimum attack to prevent pop
+  decay *= sampleRate;
+  sustain *= sampleRate;
+  release *= sampleRate;
+  delay *= sampleRate;
+  deltaSlide *= (500 * PI2) / sampleRate ** 3;
+  modulation *= PI2 / sampleRate;
+  pitchJump *= PI2 / sampleRate;
+  pitchJumpTime *= sampleRate;
+  repeatTime = (repeatTime * sampleRate) | 0;
+
+  // generate waveform
+  for (length = (attack + decay + sustain + release + delay) | 0; i < length; b[i++] = s) {
+    if (!(++c % ((bitCrush * 100) | 0))) {
+      // bit crush
+      s = shape
+        ? shape > 1
+          ? shape > 2
+            ? shape > 3 // wave shape
+              ? Math.sin((t % PI2) ** 3) // 4 noise
+              : Math.max(Math.min(Math.tan(t), 1), -1) // 3 tan
+            : 1 - (((((2 * t) / PI2) % 2) + 2) % 2) // 2 saw
+          : 1 - 4 * Math.abs(Math.round(t / PI2) - t / PI2) // 1 triangle
+        : Math.sin(t); // 0 sin
+
+      s =
+        (repeatTime
+          ? 1 - tremolo + tremolo * Math.sin((PI2 * i) / repeatTime) // tremolo
+          : 1) *
+        sign(s) *
+        Math.abs(s) ** shapeCurve * // curve 0=square, 2=pointy
+        volume *
+        1 * // envelope
+        (i < attack
+          ? i / attack // attack
+          : i < attack + decay // decay
+          ? 1 - ((i - attack) / decay) * (1 - sustainVolume) // decay falloff
+          : i < attack + decay + sustain // sustain
+          ? sustainVolume // sustain volume
+          : i < length - delay // release
+          ? ((length - i - delay) / release) * // release falloff
+            sustainVolume // release volume
+          : 0); // post release
+
+      s = delay
+        ? s / 2 +
+          (delay > i
+            ? 0 // delay
+            : ((i < length - delay ? 1 : (length - i) / delay) * // release delay
+                b[(i - delay) | 0]) /
+              2)
+        : s; // sample delay
+    }
+
+    f =
+      (frequency += slide += deltaSlide) * // frequency
+      Math.cos(modulation * tm++); // modulation
+    t += f - f * noise * (1 - (((Math.sin(i) + 1) * 1e9) % 2)); // noise
+
+    if (j && ++j > pitchJumpTime) {
+      // pitch jump
+      frequency += pitchJump; // apply pitch jump
+      startFrequency += pitchJump; // also apply to start
+      j = 0; // stop pitch jump time
+    }
+
+    if (repeatTime && !(++r % repeatTime)) {
+      // repeat
+      frequency = startFrequency; // reset frequency
+      slide = startSlide; // reset slide
+      j ||= 1; // reset pitch jump time
+    }
+  }
+
+  return b;
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e328a467..25b744d6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1,9 +1,5 @@
 lockfileVersion: '6.0'
 
-settings:
-  autoInstallPeers: true
-  excludeLinksFromLockfile: false
-
 importers:
 
   .:
@@ -395,9 +391,6 @@ importers:
       nanostores:
         specifier: ^0.8.1
         version: 0.8.1
-      zzfx:
-        specifier: ^1.2.0
-        version: 1.2.0
     devDependencies:
       vite:
         specifier: ^4.3.3
@@ -14038,6 +14031,6 @@ packages:
   /zwitch@2.0.4:
     resolution: {integrity: sha512-bXE4cR/kVZhKZX/RjPEflHaKVhUVl85noU3v6b8apfQEc1x4A+zBxjZ4lN8LqGd6WZ3dl98pY4o717VFmoPp+A==}
 
-  /zzfx@1.2.0:
-    resolution: {integrity: sha512-RtFz6PTMfCmxTfaCOv6GWAV4YaL/T0hltiMGkd87clybO8WLPlH6kX8sNkZGFKw9YPyu1UNsUYf/5/Vn4dondA==}
-    dev: false
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false