diff --git a/packages/dough/dough.mjs b/packages/dough/dough.mjs
index 14f4ffa2b..4701ce205 100644
--- a/packages/dough/dough.mjs
+++ b/packages/dough/dough.mjs
@@ -4,11 +4,13 @@ Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { register, noteToMidi } from '@strudel/core';
+import { register } from '@strudel/core';
 import { Dough, doughsamples } from 'dough-synth';
 import { getAudioContext, ensureMinimalOutput } from '@strudel/webaudio';
 import wasm from 'dough-synth/dough.wasm?url';
 import workletCode from 'dough-synth/dough.js?raw';
+import { hap2dough } from './lib.mjs';
+export * from './lib.mjs';
 
 Object.assign(globalThis, { doughsamples });
 
@@ -42,16 +44,8 @@ export async function doughOutput(hap, targetTime, cps = 1) {
   if (!offset) {
     return; // not ready
   }
-  hap.ensureObjectValue();
-  const event = {
-    dough: 'play',
-    ...hap.value,
-    time: targetTime - offset,
-    duration: hap.duration / cps,
-  };
-  if (typeof event.note === 'string') {
-    event.note = noteToMidi(event.note);
-  }
+  const t = targetTime - offset;
+  const event = hap2dough(hap, t, cps);
   D.evaluate(event);
 }
 
diff --git a/packages/dough/lib.mjs b/packages/dough/lib.mjs
new file mode 100644
index 000000000..4ceb05441
--- /dev/null
+++ b/packages/dough/lib.mjs
@@ -0,0 +1,28 @@
+import { register, registerControl, stack, Pattern, noteToMidi } from '@strudel/core';
+
+export const { group } = registerControl('group');
+export const { voices } = registerControl('voices');
+export const { glide } = registerControl('glide');
+
+export const groupmod = register('groupmod', function (modulator, pat) {
+  const modpat = modulator
+    .withValue((vm) => pat.withValue(({ group }) => ({ ...vm, group })))
+    .outerJoin()
+    .set({ dough: 'update_group' });
+  return stack(pat.set(modulator), modpat);
+});
+Pattern.prototype.gmod = Pattern.prototype.groupmod;
+
+export function hap2dough(hap, time, cps) {
+  hap.ensureObjectValue();
+  const event = {
+    dough: 'play',
+    ...hap.value,
+    time,
+    duration: hap.duration / cps,
+  };
+  if (typeof event.note === 'string') {
+    event.note = noteToMidi(event.note);
+  }
+  return event;
+}
diff --git a/packages/dough/package.json b/packages/dough/package.json
index abbb543be..7dc73a962 100644
--- a/packages/dough/package.json
+++ b/packages/dough/package.json
@@ -31,7 +31,7 @@
   "dependencies": {
     "@strudel/core": "workspace:*",
     "@strudel/webaudio": "workspace:*",
-    "dough-synth": "0.2.4"
+    "dough-synth": "0.4.1"
   },
   "devDependencies": {
     "vite": "^6.0.11"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9930ef857..c4c045c9f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -318,8 +318,8 @@ importers:
         specifier: workspace:*
         version: link:../webaudio
       dough-synth:
-        specifier: 0.2.4
-        version: 0.2.4
+        specifier: 0.4.1
+        version: 0.4.1
     devDependencies:
       vite:
         specifier: ^6.0.11
@@ -4078,8 +4078,8 @@ packages:
     resolution: {integrity: sha512-47qPchRCykZC03FhkYAhrvwU4xDBFIj1QPqaarj6mdM/hgUzfPHcpkHJOn3mJAufFeeAxAzeGsr5X0M4k6fLZQ==}
     engines: {node: '>=12'}
 
-  dough-synth@0.2.4:
-    resolution: {integrity: sha512-qMnMKVj1B2ivUgobNCwqJqNzZHOMN+5339OmCOk07zIDEK7iCYdufa+ZDE2BEgmKrWDyhGS7oTNFjHtTwzEv9w==}
+  dough-synth@0.4.1:
+    resolution: {integrity: sha512-hxBsfOBwTIlJMhSB/Pk2xNNc7YTAVTgexn5Y7GRv/Kn2qBkMxwLxHJNvhsUhklQhVvzny/aCihxb0EOq4tv5Bw==}
     hasBin: true
 
   dset@3.1.4:
@@ -8030,6 +8030,18 @@ packages:
       utf-8-validate:
         optional: true
 
+  ws@8.22.0:
+    resolution: {integrity: sha512-Ydggc987+RO0AnWtZ/7Wq9FtNvcrL1b/RO0ud9mWjUPgDrsAAwQSF51sm2hm1XofbU/4jkpGEsLFsZZxU+1DOg==}
+    engines: {node: '>=10.0.0'}
+    peerDependencies:
+      bufferutil: ^4.0.1
+      utf-8-validate: '>=5.0.2'
+    peerDependenciesMeta:
+      bufferutil:
+        optional: true
+      utf-8-validate:
+        optional: true
+
   xmlcreate@2.0.4:
     resolution: {integrity: sha512-nquOebG4sngPmGPICTS5EnxqhKbCmz5Ox5hsszI2T6U5qdrJizBc+0ilYSEjTSzU0yZcmvppztXe/5Al5fUwdg==}
 
@@ -11800,7 +11812,12 @@ snapshots:
 
   dotenv@16.4.7: {}
 
-  dough-synth@0.2.4: {}
+  dough-synth@0.4.1:
+    dependencies:
+      ws: 8.22.0
+    transitivePeerDependencies:
+      - bufferutil
+      - utf-8-validate
 
   dset@3.1.4: {}
 
@@ -16698,6 +16715,8 @@ snapshots:
 
   ws@8.18.3: {}
 
+  ws@8.22.0: {}
+
   xmlcreate@2.0.4: {}
 
   xtend@4.0.2: {}