diff --git a/packages/core/controls.mjs b/packages/core/controls.mjs
index 6cac6e54..d1a9ce7f 100644
--- a/packages/core/controls.mjs
+++ b/packages/core/controls.mjs
@@ -1066,6 +1066,7 @@ const generic_params = [
    */
   ['waveloss'],
   // TODO: midi effects?
+  ['midicmd'],
   ['dur'],
   // ['modwheel'],
   ['expression'],
diff --git a/packages/midi/midi.mjs b/packages/midi/midi.mjs
index 688b7a9b..1d89b6dc 100644
--- a/packages/midi/midi.mjs
+++ b/packages/midi/midi.mjs
@@ -76,6 +76,19 @@ function getDevice(indexOrName, devices) {
   return IACOutput ?? devices[0];
 }
 
+// send start/stop messages to outputs when repl starts/stops
+if (typeof window !== 'undefined') {
+  window.addEventListener('message', (e) => {
+    if (!WebMidi?.enabled) {
+      return;
+    }
+    if (e.data === 'strudel-stop') {
+      WebMidi.outputs.forEach((output) => output.sendStop());
+    }
+    // cannot start here, since we have no timing info, see sendStart below
+  });
+}
+
 Pattern.prototype.midi = function (output) {
   if (isPattern(output)) {
     throw new Error(
@@ -101,6 +114,7 @@ Pattern.prototype.midi = function (output) {
 
   return this.onTrigger((time, hap, currentTime, cps) => {
     if (!WebMidi.enabled) {
+      console.log('not enabled');
       return;
     }
     const device = getDevice(output, WebMidi.outputs);
@@ -111,7 +125,7 @@ Pattern.prototype.midi = function (output) {
     const timeOffsetString = `+${offset}`;
 
     // destructure value
-    const { note, nrpnn, nrpv, ccn, ccv, midichan = 1 } = hap.value;
+    const { note, nrpnn, nrpv, ccn, ccv, midichan = 1, midicmd } = hap.value;
     const velocity = hap.context?.velocity ?? 0.9; // TODO: refactor velocity
 
     // note off messages will often a few ms arrive late, try to prevent glitching by subtracting from the duration length
@@ -123,7 +137,7 @@ Pattern.prototype.midi = function (output) {
         time: timeOffsetString,
       });
     }
-    if (ccv && ccn) {
+    if (ccv !== undefined && ccn !== undefined) {
       if (typeof ccv !== 'number' || ccv < 0 || ccv > 1) {
         throw new Error('expected ccv to be a number between 0 and 1');
       }
@@ -133,6 +147,19 @@ Pattern.prototype.midi = function (output) {
       const scaled = Math.round(ccv * 127);
       device.sendControlChange(ccn, scaled, midichan, { time: timeOffsetString });
     }
+    if (hap.whole.begin + 0 === 0) {
+      // we need to start here because we have the timing info
+      device.sendStart({ time: timeOffsetString });
+    }
+    if (['clock', 'midiClock'].includes(midicmd)) {
+      device.sendClock({ time: timeOffsetString });
+    } else if (['start'].includes(midicmd)) {
+      device.sendStart({ time: timeOffsetString });
+    } else if (['stop'].includes(midicmd)) {
+      device.sendStop({ time: timeOffsetString });
+    } else if (['continue'].includes(midicmd)) {
+      device.sendContinue({ time: timeOffsetString });
+    }
   });
 };
 
diff --git a/packages/superdough/dspworklet.mjs b/packages/superdough/dspworklet.mjs
new file mode 100644
index 00000000..deff485a
--- /dev/null
+++ b/packages/superdough/dspworklet.mjs
@@ -0,0 +1,79 @@
+import { getAudioContext } from './superdough.mjs';
+
+let worklet;
+export async function dspWorklet(ac, code) {
+  const name = `dsp-worklet-${Date.now()}`;
+  const workletCode = `${code}
+let __q = []; // trigger queue
+class MyProcessor extends AudioWorkletProcessor {
+  constructor() {
+    super();
+    this.t = 0;
+    this.stopped = false;
+    this.port.onmessage = (e) => {
+      if(e.data==='stop') {
+        this.stopped = true;
+      } else if(e.data?.dough) {
+        __q.push(e.data)
+      } else {
+        msg?.(e.data)
+      }
+    };
+  }
+  process(inputs, outputs, parameters) {
+    const output = outputs[0];
+    if(__q.length) {
+      for(let i=0;i<__q.length;++i) {
+        const deadline = __q[i].time-currentTime;
+        if(deadline<=0) {
+          trigger(__q[i].dough)
+          __q.splice(i,1)
+        }
+      }
+    }
+    for (let i = 0; i < output[0].length; i++) {
+      const out = dsp(this.t / sampleRate);
+      output.forEach((channel) => {
+        channel[i] = out;
+      });
+      this.t++;
+    }
+  return !this.stopped;
+  }
+}
+registerProcessor('${name}', MyProcessor);
+`;
+  const base64String = btoa(workletCode);
+  const dataURL = `data:text/javascript;base64,${base64String}`;
+  await ac.audioWorklet.addModule(dataURL);
+  const node = new AudioWorkletNode(ac, name);
+  const stop = () => node.port.postMessage('stop');
+  return { node, stop };
+}
+const stop = () => {
+  if (worklet) {
+    worklet?.stop();
+    worklet?.node?.disconnect();
+  }
+};
+
+if (typeof window !== 'undefined') {
+  window.addEventListener('message', (e) => {
+    if (e.data === 'strudel-stop') {
+      stop();
+    } else if (e.data?.dough) {
+      worklet?.node.port.postMessage(e.data);
+    }
+  });
+}
+
+export const dough = async (code) => {
+  const ac = getAudioContext();
+  stop();
+  worklet = await dspWorklet(ac, code);
+  worklet.node.connect(ac.destination);
+};
+
+export function doughTrigger(t, hap, currentTime, duration, cps) {
+  window.postMessage({ time: t, dough: hap.value, currentTime, duration, cps });
+}
diff --git a/packages/superdough/index.mjs b/packages/superdough/index.mjs
index e5d4498b..3247c5b4 100644
--- a/packages/superdough/index.mjs
+++ b/packages/superdough/index.mjs
@@ -10,3 +10,4 @@ export * from './helpers.mjs';
 export * from './synth.mjs';
 export * from './zzfx.mjs';
 export * from './logger.mjs';
+export * from './dspworklet.mjs';
diff --git a/packages/superdough/package.json b/packages/superdough/package.json
index 69ba6f8c..387749c8 100644
--- a/packages/superdough/package.json
+++ b/packages/superdough/package.json
@@ -1,6 +1,6 @@
 {
   "name": "superdough",
-  "version": "0.9.8",
+  "version": "0.9.9",
   "description": "simple web audio synth and sampler intended for live coding. inspired by superdirt and webdirt.",
   "main": "index.mjs",
   "type": "module",
diff --git a/packages/webaudio/webaudio.mjs b/packages/webaudio/webaudio.mjs
index 8b32a90c..fb4a3d7d 100644
--- a/packages/webaudio/webaudio.mjs
+++ b/packages/webaudio/webaudio.mjs
@@ -5,7 +5,7 @@ This program is free software: you can redistribute it and/or modify it under th
 */
 
 import * as strudel from '@strudel.cycles/core';
-import { superdough, getAudioContext, setLogger } from 'superdough';
+import { superdough, getAudioContext, setLogger, doughTrigger } from 'superdough';
 const { Pattern, logger } = strudel;
 
 setLogger(logger);
@@ -35,3 +35,7 @@ export function webaudioScheduler(options = {}) {
     onTrigger: strudel.getTrigger({ defaultOutput, getTime }),
   });
 }
+
+Pattern.prototype.dough = function () {
+  return this.onTrigger(doughTrigger, 1);
+};
diff --git a/website/src/repl/Repl.jsx b/website/src/repl/Repl.jsx
index eb61a216..4002eba8 100644
--- a/website/src/repl/Repl.jsx
+++ b/website/src/repl/Repl.jsx
@@ -149,7 +149,14 @@ export function Repl({ embedded = false }) {
       onEvalError: (err) => {
         setPending(false);
       },
-      onToggle: (play) => !play && cleanupDraw(false),
+      onToggle: (play) => {
+        if (!play) {
+          cleanupDraw(false);
+          window.postMessage('strudel-stop');
+        } else {
+          window.postMessage('strudel-start');
+        }
+      },
       drawContext,
       // drawTime: [0, 6],
       paintOptions,