diff --git a/packages/core/controls.mjs b/packages/core/controls.mjs
index c6dbc614..71f58427 100644
--- a/packages/core/controls.mjs
+++ b/packages/core/controls.mjs
@@ -121,6 +121,7 @@ const generic_params = [
    * note("c e g b")
    * .fm(4)
    * .fmh("<1 2 1.5 1.61>")
+   * .scope()
    *
    */
   [['fmh', 'fmi'], 'fmh'],
@@ -134,6 +135,7 @@ const generic_params = [
    * @example
    * note("c e g b")
    * .fm("<0 1 2 8 32>")
+   * .scope()
    *
    */
   [['fmi', 'fmh'], 'fm'],
@@ -149,6 +151,7 @@ const generic_params = [
    * .fmdecay(.2)
    * .fmsustain(0)
    * .fmenv("<exp lin>")
+   * .scope()
    *
    */
   ['fmenv'],
@@ -161,6 +164,7 @@ const generic_params = [
    * note("c e g b")
    * .fm(4)
    * .fmattack("<0 .05 .1 .2>")
+   * .scope()
    *
    */
   ['fmattack'],
@@ -174,6 +178,7 @@ const generic_params = [
    * .fm(4)
    * .fmdecay("<.01 .05 .1 .2>")
    * .fmsustain(.4)
+   * .scope()
    *
    */
   ['fmdecay'],
@@ -187,6 +192,7 @@ const generic_params = [
    * .fm(4)
    * .fmdecay(.1)
    * .fmsustain("<1 .75 .5 0>")
+   * .scope()
    *
    */
   ['fmsustain'],
@@ -861,8 +867,22 @@ const generic_params = [
    *
    */
   ['clip'],
-];
 
+  // ZZFX
+  ['zrand'],
+  ['curve'],
+  ['slide'], // superdirt duplicate
+  ['deltaSlide'],
+  ['pitchJump'],
+  ['pitchJumpTime'],
+  ['lfo', 'repeatTime'],
+  ['noise'],
+  ['zmod'],
+  ['zcrush'], // like crush but scaled differently
+  ['zdelay'],
+  ['tremolo'],
+  ['zzfx'],
+];
 // TODO: slice / splice https://www.youtube.com/watch?v=hKhPdO0RKDQ&list=PL2lW1zNIIwj3bDkh-Y3LUGDuRcoUigoDs&index=13
 
 controls.createParam = function (names) {
diff --git a/packages/core/draw.mjs b/packages/core/draw.mjs
index d1cdd7be..c57baa63 100644
--- a/packages/core/draw.mjs
+++ b/packages/core/draw.mjs
@@ -29,6 +29,9 @@ export const getDrawContext = (id = 'test-canvas') => {
 };
 
 Pattern.prototype.draw = function (callback, { from, to, onQuery } = {}) {
+  if (typeof window === 'undefined') {
+    return this;
+  }
   if (window.strudelAnimation) {
     cancelAnimationFrame(window.strudelAnimation);
   }
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/index.mjs b/packages/superdough/index.mjs
index b795539a..e5d4498b 100644
--- a/packages/superdough/index.mjs
+++ b/packages/superdough/index.mjs
@@ -8,4 +8,5 @@ export * from './superdough.mjs';
 export * from './sampler.mjs';
 export * from './helpers.mjs';
 export * from './synth.mjs';
+export * from './zzfx.mjs';
 export * from './logger.mjs';
diff --git a/packages/superdough/superdough.mjs b/packages/superdough/superdough.mjs
index d5a2ca3f..af22355f 100644
--- a/packages/superdough/superdough.mjs
+++ b/packages/superdough/superdough.mjs
@@ -167,6 +167,8 @@ export const superdough = async (value, deadline, hapDuration) => {
     );
   }
 
+  // duration is passed as value too..
+  value.duration = hapDuration;
   // calculate absolute time
   let t = ac.currentTime + deadline;
   // destructure
diff --git a/packages/superdough/zzfx.mjs b/packages/superdough/zzfx.mjs
new file mode 100644
index 00000000..da505d74
--- /dev/null
+++ b/packages/superdough/zzfx.mjs
@@ -0,0 +1,124 @@
+//import { ZZFX } from 'zzfx';
+import { midiToFreq, noteToMidi } from './util.mjs';
+import { registerSound, getAudioContext } from './superdough.mjs';
+import { buildSamples } from './zzfx_fork.mjs';
+
+export const getZZFX = (value, t) => {
+  let {
+    s,
+    note = 36,
+    freq,
+    //
+    zrand = 0,
+    attack = 0,
+    decay = 0,
+    sustain = 0.8,
+    release = 0.1,
+    curve = 1,
+    slide = 0,
+    deltaSlide = 0,
+    pitchJump = 0,
+    pitchJumpTime = 0,
+    lfo = 0,
+    noise = 0,
+    zmod = 0,
+    zcrush = 0,
+    zdelay = 0,
+    tremolo = 0,
+    duration = 0.2,
+    zzfx,
+  } = value;
+  const sustainTime = Math.max(duration - attack - decay, 0);
+  if (typeof note === 'string') {
+    note = noteToMidi(note); // e.g. c3 => 48
+  }
+  // get frequency
+  if (!freq && typeof note === 'number') {
+    freq = midiToFreq(note);
+  }
+  s = s.replace('z_', '');
+  const shape = ['sine', 'triangle', 'sawtooth', 'tan', 'noise'].indexOf(s) || 0;
+  curve = s === 'square' ? 0 : curve;
+
+  const params = zzfx || [
+    0.25, // volume
+    zrand,
+    freq,
+    attack,
+    sustainTime,
+    release,
+    shape,
+    curve,
+    slide,
+    deltaSlide,
+    pitchJump,
+    pitchJumpTime,
+    lfo,
+    noise,
+    zmod,
+    zcrush,
+    zdelay,
+    sustain, // sustain volume!
+    decay,
+    tremolo,
+  ];
+  // console.log(redableZZFX(params));
+
+  const samples = /* ZZFX. */ buildSamples(...params);
+  const context = getAudioContext();
+  const buffer = context.createBuffer(1, samples.length, context.sampleRate);
+  buffer.getChannelData(0).set(samples);
+  const source = getAudioContext().createBufferSource();
+  source.buffer = buffer;
+  source.start(t);
+  return {
+    node: source,
+  };
+};
+
+export function registerZZFXSounds() {
+  ['zzfx', 'z_sine', 'z_sawtooth', 'z_triangle', 'z_square', 'z_tan', 'z_noise'].forEach((wave) => {
+    registerSound(
+      wave,
+      (t, value, onended) => {
+        const { node: o } = getZZFX({ s: wave, ...value }, t);
+        o.onended = () => {
+          o.disconnect();
+          onended();
+        };
+        return {
+          node: o,
+          stop: () => {},
+        };
+      },
+      { type: 'synth', prebake: true },
+    );
+  });
+}
+
+// just for debugging
+function redableZZFX(params) {
+  const paramOrder = [
+    'volume',
+    'zrand',
+    'frequency',
+    'attack',
+    'sustain',
+    'release',
+    'shape',
+    'curve',
+    'slide',
+    'deltaSlide',
+    'pitchJump',
+    'pitchJumpTime',
+    'lfo',
+    'noise',
+    'zmod',
+    'zcrush',
+    'zdelay',
+    'sustainVolume',
+    'decay',
+    'tremolo',
+  ];
+  return Object.fromEntries(paramOrder.map((param, i) => [param, params[i]]));
+}
diff --git a/packages/superdough/zzfx_fork.mjs b/packages/superdough/zzfx_fork.mjs
new file mode 100644
index 00000000..8c6bdbb5
--- /dev/null
+++ b/packages/superdough/zzfx_fork.mjs
@@ -0,0 +1,120 @@
+import { getAudioContext } from './superdough.mjs';
+
+// https://github.com/KilledByAPixel/ZzFX/blob/master/ZzFX.js#L85C5-L180C6
+// changes: replaced this.volume with 1 + using sampleRate from getAudioContext()
+export 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/test/__snapshots__/examples.test.mjs.snap b/test/__snapshots__/examples.test.mjs.snap
index 787bc461..60b39c53 100644
--- a/test/__snapshots__/examples.test.mjs.snap
+++ b/test/__snapshots__/examples.test.mjs.snap
@@ -1806,127 +1806,127 @@ exports[`runs examples > example "floor" example index 0 1`] = `
 
 exports[`runs examples > example "fm" example index 0 1`] = `
 [
-  "[ 0/1 → 1/4 | note:c fmi:0 ]",
-  "[ 1/4 → 1/2 | note:e fmi:0 ]",
-  "[ 1/2 → 3/4 | note:g fmi:0 ]",
-  "[ 3/4 → 1/1 | note:b fmi:0 ]",
-  "[ 1/1 → 5/4 | note:c fmi:1 ]",
-  "[ 5/4 → 3/2 | note:e fmi:1 ]",
-  "[ 3/2 → 7/4 | note:g fmi:1 ]",
-  "[ 7/4 → 2/1 | note:b fmi:1 ]",
-  "[ 2/1 → 9/4 | note:c fmi:2 ]",
-  "[ 9/4 → 5/2 | note:e fmi:2 ]",
-  "[ 5/2 → 11/4 | note:g fmi:2 ]",
-  "[ 11/4 → 3/1 | note:b fmi:2 ]",
-  "[ 3/1 → 13/4 | note:c fmi:8 ]",
-  "[ 13/4 → 7/2 | note:e fmi:8 ]",
-  "[ 7/2 → 15/4 | note:g fmi:8 ]",
-  "[ 15/4 → 4/1 | note:b fmi:8 ]",
+  "[ 0/1 → 1/4 | note:c fmi:0 analyze:1 ]",
+  "[ 1/4 → 1/2 | note:e fmi:0 analyze:1 ]",
+  "[ 1/2 → 3/4 | note:g fmi:0 analyze:1 ]",
+  "[ 3/4 → 1/1 | note:b fmi:0 analyze:1 ]",
+  "[ 1/1 → 5/4 | note:c fmi:1 analyze:1 ]",
+  "[ 5/4 → 3/2 | note:e fmi:1 analyze:1 ]",
+  "[ 3/2 → 7/4 | note:g fmi:1 analyze:1 ]",
+  "[ 7/4 → 2/1 | note:b fmi:1 analyze:1 ]",
+  "[ 2/1 → 9/4 | note:c fmi:2 analyze:1 ]",
+  "[ 9/4 → 5/2 | note:e fmi:2 analyze:1 ]",
+  "[ 5/2 → 11/4 | note:g fmi:2 analyze:1 ]",
+  "[ 11/4 → 3/1 | note:b fmi:2 analyze:1 ]",
+  "[ 3/1 → 13/4 | note:c fmi:8 analyze:1 ]",
+  "[ 13/4 → 7/2 | note:e fmi:8 analyze:1 ]",
+  "[ 7/2 → 15/4 | note:g fmi:8 analyze:1 ]",
+  "[ 15/4 → 4/1 | note:b fmi:8 analyze:1 ]",
 ]
 `;
 
 exports[`runs examples > example "fmattack" example index 0 1`] = `
 [
-  "[ 0/1 → 1/4 | note:c fmi:4 fmattack:0 ]",
-  "[ 1/4 → 1/2 | note:e fmi:4 fmattack:0 ]",
-  "[ 1/2 → 3/4 | note:g fmi:4 fmattack:0 ]",
-  "[ 3/4 → 1/1 | note:b fmi:4 fmattack:0 ]",
-  "[ 1/1 → 5/4 | note:c fmi:4 fmattack:0.05 ]",
-  "[ 5/4 → 3/2 | note:e fmi:4 fmattack:0.05 ]",
-  "[ 3/2 → 7/4 | note:g fmi:4 fmattack:0.05 ]",
-  "[ 7/4 → 2/1 | note:b fmi:4 fmattack:0.05 ]",
-  "[ 2/1 → 9/4 | note:c fmi:4 fmattack:0.1 ]",
-  "[ 9/4 → 5/2 | note:e fmi:4 fmattack:0.1 ]",
-  "[ 5/2 → 11/4 | note:g fmi:4 fmattack:0.1 ]",
-  "[ 11/4 → 3/1 | note:b fmi:4 fmattack:0.1 ]",
-  "[ 3/1 → 13/4 | note:c fmi:4 fmattack:0.2 ]",
-  "[ 13/4 → 7/2 | note:e fmi:4 fmattack:0.2 ]",
-  "[ 7/2 → 15/4 | note:g fmi:4 fmattack:0.2 ]",
-  "[ 15/4 → 4/1 | note:b fmi:4 fmattack:0.2 ]",
+  "[ 0/1 → 1/4 | note:c fmi:4 fmattack:0 analyze:1 ]",
+  "[ 1/4 → 1/2 | note:e fmi:4 fmattack:0 analyze:1 ]",
+  "[ 1/2 → 3/4 | note:g fmi:4 fmattack:0 analyze:1 ]",
+  "[ 3/4 → 1/1 | note:b fmi:4 fmattack:0 analyze:1 ]",
+  "[ 1/1 → 5/4 | note:c fmi:4 fmattack:0.05 analyze:1 ]",
+  "[ 5/4 → 3/2 | note:e fmi:4 fmattack:0.05 analyze:1 ]",
+  "[ 3/2 → 7/4 | note:g fmi:4 fmattack:0.05 analyze:1 ]",
+  "[ 7/4 → 2/1 | note:b fmi:4 fmattack:0.05 analyze:1 ]",
+  "[ 2/1 → 9/4 | note:c fmi:4 fmattack:0.1 analyze:1 ]",
+  "[ 9/4 → 5/2 | note:e fmi:4 fmattack:0.1 analyze:1 ]",
+  "[ 5/2 → 11/4 | note:g fmi:4 fmattack:0.1 analyze:1 ]",
+  "[ 11/4 → 3/1 | note:b fmi:4 fmattack:0.1 analyze:1 ]",
+  "[ 3/1 → 13/4 | note:c fmi:4 fmattack:0.2 analyze:1 ]",
+  "[ 13/4 → 7/2 | note:e fmi:4 fmattack:0.2 analyze:1 ]",
+  "[ 7/2 → 15/4 | note:g fmi:4 fmattack:0.2 analyze:1 ]",
+  "[ 15/4 → 4/1 | note:b fmi:4 fmattack:0.2 analyze:1 ]",
 ]
 `;
 
 exports[`runs examples > example "fmdecay" example index 0 1`] = `
 [
-  "[ 0/1 → 1/4 | note:c fmi:4 fmdecay:0.01 fmsustain:0.4 ]",
-  "[ 1/4 → 1/2 | note:e fmi:4 fmdecay:0.01 fmsustain:0.4 ]",
-  "[ 1/2 → 3/4 | note:g fmi:4 fmdecay:0.01 fmsustain:0.4 ]",
-  "[ 3/4 → 1/1 | note:b fmi:4 fmdecay:0.01 fmsustain:0.4 ]",
-  "[ 1/1 → 5/4 | note:c fmi:4 fmdecay:0.05 fmsustain:0.4 ]",
-  "[ 5/4 → 3/2 | note:e fmi:4 fmdecay:0.05 fmsustain:0.4 ]",
-  "[ 3/2 → 7/4 | note:g fmi:4 fmdecay:0.05 fmsustain:0.4 ]",
-  "[ 7/4 → 2/1 | note:b fmi:4 fmdecay:0.05 fmsustain:0.4 ]",
-  "[ 2/1 → 9/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0.4 ]",
-  "[ 9/4 → 5/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0.4 ]",
-  "[ 5/2 → 11/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0.4 ]",
-  "[ 11/4 → 3/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0.4 ]",
-  "[ 3/1 → 13/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0.4 ]",
-  "[ 13/4 → 7/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0.4 ]",
-  "[ 7/2 → 15/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0.4 ]",
-  "[ 15/4 → 4/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0.4 ]",
+  "[ 0/1 → 1/4 | note:c fmi:4 fmdecay:0.01 fmsustain:0.4 analyze:1 ]",
+  "[ 1/4 → 1/2 | note:e fmi:4 fmdecay:0.01 fmsustain:0.4 analyze:1 ]",
+  "[ 1/2 → 3/4 | note:g fmi:4 fmdecay:0.01 fmsustain:0.4 analyze:1 ]",
+  "[ 3/4 → 1/1 | note:b fmi:4 fmdecay:0.01 fmsustain:0.4 analyze:1 ]",
+  "[ 1/1 → 5/4 | note:c fmi:4 fmdecay:0.05 fmsustain:0.4 analyze:1 ]",
+  "[ 5/4 → 3/2 | note:e fmi:4 fmdecay:0.05 fmsustain:0.4 analyze:1 ]",
+  "[ 3/2 → 7/4 | note:g fmi:4 fmdecay:0.05 fmsustain:0.4 analyze:1 ]",
+  "[ 7/4 → 2/1 | note:b fmi:4 fmdecay:0.05 fmsustain:0.4 analyze:1 ]",
+  "[ 2/1 → 9/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0.4 analyze:1 ]",
+  "[ 9/4 → 5/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0.4 analyze:1 ]",
+  "[ 5/2 → 11/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0.4 analyze:1 ]",
+  "[ 11/4 → 3/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0.4 analyze:1 ]",
+  "[ 3/1 → 13/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0.4 analyze:1 ]",
+  "[ 13/4 → 7/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0.4 analyze:1 ]",
+  "[ 7/2 → 15/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0.4 analyze:1 ]",
+  "[ 15/4 → 4/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0.4 analyze:1 ]",
 ]
 `;
 
 exports[`runs examples > example "fmenv" example index 0 1`] = `
 [
-  "[ 0/1 → 1/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 1/4 → 1/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 1/2 → 3/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 3/4 → 1/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 1/1 → 5/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 5/4 → 3/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 3/2 → 7/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 7/4 → 2/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 2/1 → 9/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 9/4 → 5/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 5/2 → 11/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 11/4 → 3/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp ]",
-  "[ 3/1 → 13/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 13/4 → 7/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 7/2 → 15/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
-  "[ 15/4 → 4/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin ]",
+  "[ 0/1 → 1/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 1/4 → 1/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 1/2 → 3/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 3/4 → 1/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 1/1 → 5/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 5/4 → 3/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 3/2 → 7/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 7/4 → 2/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 2/1 → 9/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 9/4 → 5/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 5/2 → 11/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 11/4 → 3/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:exp analyze:1 ]",
+  "[ 3/1 → 13/4 | note:c fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 13/4 → 7/2 | note:e fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 7/2 → 15/4 | note:g fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
+  "[ 15/4 → 4/1 | note:b fmi:4 fmdecay:0.2 fmsustain:0 fmenv:lin analyze:1 ]",
 ]
 `;
 
 exports[`runs examples > example "fmh" example index 0 1`] = `
 [
-  "[ 0/1 → 1/4 | note:c fmi:4 fmh:1 ]",
-  "[ 1/4 → 1/2 | note:e fmi:4 fmh:1 ]",
-  "[ 1/2 → 3/4 | note:g fmi:4 fmh:1 ]",
-  "[ 3/4 → 1/1 | note:b fmi:4 fmh:1 ]",
-  "[ 1/1 → 5/4 | note:c fmi:4 fmh:2 ]",
-  "[ 5/4 → 3/2 | note:e fmi:4 fmh:2 ]",
-  "[ 3/2 → 7/4 | note:g fmi:4 fmh:2 ]",
-  "[ 7/4 → 2/1 | note:b fmi:4 fmh:2 ]",
-  "[ 2/1 → 9/4 | note:c fmi:4 fmh:1.5 ]",
-  "[ 9/4 → 5/2 | note:e fmi:4 fmh:1.5 ]",
-  "[ 5/2 → 11/4 | note:g fmi:4 fmh:1.5 ]",
-  "[ 11/4 → 3/1 | note:b fmi:4 fmh:1.5 ]",
-  "[ 3/1 → 13/4 | note:c fmi:4 fmh:1.61 ]",
-  "[ 13/4 → 7/2 | note:e fmi:4 fmh:1.61 ]",
-  "[ 7/2 → 15/4 | note:g fmi:4 fmh:1.61 ]",
-  "[ 15/4 → 4/1 | note:b fmi:4 fmh:1.61 ]",
+  "[ 0/1 → 1/4 | note:c fmi:4 fmh:1 analyze:1 ]",
+  "[ 1/4 → 1/2 | note:e fmi:4 fmh:1 analyze:1 ]",
+  "[ 1/2 → 3/4 | note:g fmi:4 fmh:1 analyze:1 ]",
+  "[ 3/4 → 1/1 | note:b fmi:4 fmh:1 analyze:1 ]",
+  "[ 1/1 → 5/4 | note:c fmi:4 fmh:2 analyze:1 ]",
+  "[ 5/4 → 3/2 | note:e fmi:4 fmh:2 analyze:1 ]",
+  "[ 3/2 → 7/4 | note:g fmi:4 fmh:2 analyze:1 ]",
+  "[ 7/4 → 2/1 | note:b fmi:4 fmh:2 analyze:1 ]",
+  "[ 2/1 → 9/4 | note:c fmi:4 fmh:1.5 analyze:1 ]",
+  "[ 9/4 → 5/2 | note:e fmi:4 fmh:1.5 analyze:1 ]",
+  "[ 5/2 → 11/4 | note:g fmi:4 fmh:1.5 analyze:1 ]",
+  "[ 11/4 → 3/1 | note:b fmi:4 fmh:1.5 analyze:1 ]",
+  "[ 3/1 → 13/4 | note:c fmi:4 fmh:1.61 analyze:1 ]",
+  "[ 13/4 → 7/2 | note:e fmi:4 fmh:1.61 analyze:1 ]",
+  "[ 7/2 → 15/4 | note:g fmi:4 fmh:1.61 analyze:1 ]",
+  "[ 15/4 → 4/1 | note:b fmi:4 fmh:1.61 analyze:1 ]",
 ]
 `;
 
 exports[`runs examples > example "fmsustain" example index 0 1`] = `
 [
-  "[ 0/1 → 1/4 | note:c fmi:4 fmdecay:0.1 fmsustain:1 ]",
-  "[ 1/4 → 1/2 | note:e fmi:4 fmdecay:0.1 fmsustain:1 ]",
-  "[ 1/2 → 3/4 | note:g fmi:4 fmdecay:0.1 fmsustain:1 ]",
-  "[ 3/4 → 1/1 | note:b fmi:4 fmdecay:0.1 fmsustain:1 ]",
-  "[ 1/1 → 5/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0.75 ]",
-  "[ 5/4 → 3/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0.75 ]",
-  "[ 3/2 → 7/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0.75 ]",
-  "[ 7/4 → 2/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0.75 ]",
-  "[ 2/1 → 9/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0.5 ]",
-  "[ 9/4 → 5/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0.5 ]",
-  "[ 5/2 → 11/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0.5 ]",
-  "[ 11/4 → 3/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0.5 ]",
-  "[ 3/1 → 13/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0 ]",
-  "[ 13/4 → 7/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0 ]",
-  "[ 7/2 → 15/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0 ]",
-  "[ 15/4 → 4/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0 ]",
+  "[ 0/1 → 1/4 | note:c fmi:4 fmdecay:0.1 fmsustain:1 analyze:1 ]",
+  "[ 1/4 → 1/2 | note:e fmi:4 fmdecay:0.1 fmsustain:1 analyze:1 ]",
+  "[ 1/2 → 3/4 | note:g fmi:4 fmdecay:0.1 fmsustain:1 analyze:1 ]",
+  "[ 3/4 → 1/1 | note:b fmi:4 fmdecay:0.1 fmsustain:1 analyze:1 ]",
+  "[ 1/1 → 5/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0.75 analyze:1 ]",
+  "[ 5/4 → 3/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0.75 analyze:1 ]",
+  "[ 3/2 → 7/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0.75 analyze:1 ]",
+  "[ 7/4 → 2/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0.75 analyze:1 ]",
+  "[ 2/1 → 9/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0.5 analyze:1 ]",
+  "[ 9/4 → 5/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0.5 analyze:1 ]",
+  "[ 5/2 → 11/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0.5 analyze:1 ]",
+  "[ 11/4 → 3/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0.5 analyze:1 ]",
+  "[ 3/1 → 13/4 | note:c fmi:4 fmdecay:0.1 fmsustain:0 analyze:1 ]",
+  "[ 13/4 → 7/2 | note:e fmi:4 fmdecay:0.1 fmsustain:0 analyze:1 ]",
+  "[ 7/2 → 15/4 | note:g fmi:4 fmdecay:0.1 fmsustain:0 analyze:1 ]",
+  "[ 15/4 → 4/1 | note:b fmi:4 fmdecay:0.1 fmsustain:0 analyze:1 ]",
 ]
 `;
 
diff --git a/website/src/pages/learn/synths.mdx b/website/src/pages/learn/synths.mdx
index 9c515752..b24726cf 100644
--- a/website/src/pages/learn/synths.mdx
+++ b/website/src/pages/learn/synths.mdx
@@ -8,28 +8,52 @@ import { JsDoc } from '../../docs/JsDoc';
 
 # Synths
 
-For now, [samples](/learn/samples) are the main way to play with Strudel.
-In the future, more powerful synthesis capabilities will be added.
-If in the meantime you want to dive deeper into audio synthesis with Tidal, you will need to [install SuperCollider and SuperDirt](https://tidalcycles.org/docs/).
+In addition to the sampling engine, strudel comes with a synthesizer to create sounds on the fly.
 
-## Playing synths with `s`
+## Basic Waveforms
 
-We can change the sound, using the `s` function:
+The basic waveforms are `sine`, `sawtooth`, `square` and `triangle`, which can be selected via `sound` (or `s`):
 
-<MiniRepl client:idle tune={`note("c2 <eb2 <g2 g1>>").s('sawtooth')`} />
+<MiniRepl
+  client:idle
+  tune={`note("c2 <eb2 <g2 g1>>")
+.sound("<sawtooth square triangle sine>")
+.scope()`}
+/>
 
-Here, we are wrapping our notes inside `note` and set the sound using `s`, connected by a dot.
+If you don't set a `sound` but a `note` the default value for `sound` is `triangle`!
 
-Those functions are only 2 of many ways to alter the properties, or _params_ of a sound.
-The power of patterns allows us to sequence any _param_ independently:
+### Additive Synthesis
 
-<MiniRepl client:idle tune={`note("c2 <eb2 <g2 g1>>").s("<sawtooth square triangle>")`} />
+To tame the harsh sound of the basic waveforms, we can set the `n` control to limit the overtones of the waveform:
 
-Now we not only pattern the notes, but the sound as well!
-`sawtooth` `square` and `triangle` are the basic waveforms available in `s`.
+<MiniRepl
+  client:idle
+  tune={`note("c2 <eb2 <g2 g1>>")
+.sound("sawtooth")
+.n("<32 16 8 4>")
+.scope()`}
+/>
+
+When the `n` control is used on a basic waveform, it defines the number of harmonic partials the sound is getting.
+You can also set `n` directly in mini notation with `sound`:
+
+<MiniRepl
+  client:idle
+  tune={`note("c2 <eb2 <g2 g1>>")
+.sound("sawtooth:<32 16 8 4>")
+.scope()`}
+/>
+
+Note for tidal users: `n` in tidal is synonymous to `note` for synths only.
+In strudel, this is not the case, where `n` will always change timbre, be it though different samples or different waveforms.
 
 ## FM Synthesis
 
+FM Synthesis is a technique that changes the frequency of a basic waveform rapidly to alter the timbre.
+
+You can use fm with any of the above waveforms, although the below examples all use the default triangle wave.
+
 ### fm
 
 <JsDoc client:idle name="fm" h={0} />
@@ -54,4 +78,41 @@ Now we not only pattern the notes, but the sound as well!
 
 <JsDoc client:idle name="fmenv" h={0} />
 
+## ZZFX
+
+The "Zuper Zmall Zound Zynth" [ZZFX](https://github.com/KilledByAPixel/ZzFX) is also integrated in strudel.
+Developed by [Frank Force](https://frankforce.com/), it is a synth and FX engine originally intended to be used for size coding games.
+
+It has 20 parameters in total, here is a snippet that uses all:
+
+<MiniRepl
+  client:idle
+  tune={`note("<c2 eb2 f2 g2>") // also supports freq
+  .s("<z_sawtooth z_tan z_noise z_sine z_square>")
+  .zrand(0) // randomization
+  // zzfx envelope
+  .attack(0.001)
+  .decay(0.1)
+  .sustain(.8)
+  .release(.1)
+  // special zzfx params
+  .curve(1) // waveshape 1-3
+  .slide(0) // +/- pitch slide
+  .deltaSlide(0) // +/- pitch slide (?)
+  .noise(0) // make it dirty
+  .zmod(0) // fm speed
+  .zcrush(0) // bit crush 0 - 1
+  .zdelay(0) // simple delay
+  .pitchJump(0) // +/- pitch change after pitchJumpTime
+  .pitchJumpTime(0) // >0 time after pitchJump is applied
+  .lfo(0) // >0 resets slide + pitchJump + sets tremolo speed
+  .tremolo(0) // 0-1 lfo volume modulation amount
+  //.duration(.2) // overwrite strudel event duration
+  //.gain(1) // change volume
+  .scope() // vizualise waveform (not zzfx related)
+`}
+/>
+
+Note that you can also combine zzfx with all the other audio fx (next chapter).
+
 Next up: [Audio Effects](/learn/effects)...
diff --git a/website/src/repl/prebake.mjs b/website/src/repl/prebake.mjs
index 6bdc5c0d..28678c9d 100644
--- a/website/src/repl/prebake.mjs
+++ b/website/src/repl/prebake.mjs
@@ -1,5 +1,5 @@
 import { Pattern, noteToMidi, valueToMidi } from '@strudel.cycles/core';
-import { registerSynthSounds, samples } from '@strudel.cycles/webaudio';
+import { registerSynthSounds, registerZZFXSounds, samples } from '@strudel.cycles/webaudio';
 import './piano.mjs';
 import './files.mjs';
 
@@ -8,6 +8,7 @@ export async function prebake() {
   // License: CC-by http://creativecommons.org/licenses/by/3.0/ Author: Alexander Holm
   await Promise.all([
     registerSynthSounds(),
+    registerZZFXSounds(),
     //registerSoundfonts(),
     // need dynamic import here, because importing @strudel.cycles/soundfonts fails on server:
     // => getting "window is not defined", as soon as "@strudel.cycles/soundfonts" is imported statically