diff --git a/packages/desktopbridge/midibridge.mjs b/packages/desktopbridge/midibridge.mjs
index 6959a5bb..ebbb185b 100644
--- a/packages/desktopbridge/midibridge.mjs
+++ b/packages/desktopbridge/midibridge.mjs
@@ -6,11 +6,11 @@ const OFF_MESSAGE = 0x80;
 const CC_MESSAGE = 0xb0;
 
 Pattern.prototype.midi = function (output) {
-  return this.onTrigger((time, hap, currentTime) => {
+  return this.onTrigger((time, hap, currentTime, cps) => {
     const { note, nrpnn, nrpv, ccn, ccv } = hap.value;
     const offset = (time - currentTime) * 1000;
     const velocity = Math.floor((hap.context?.velocity ?? 0.9) * 100); // TODO: refactor velocity
-    const duration = Math.floor(hap.duration.valueOf() * 1000 - 10);
+    const duration = Math.floor((hap.duration.valueOf() / cps) * 1000 - 10);
     const roundedOffset = Math.round(offset);
     const midichan = (hap.value.midichan ?? 1) - 1;
     const requestedport = output ?? 'IAC';
diff --git a/packages/midi/midi.mjs b/packages/midi/midi.mjs
index f40a5049..96a29c27 100644
--- a/packages/midi/midi.mjs
+++ b/packages/midi/midi.mjs
@@ -129,7 +129,7 @@ Pattern.prototype.midi = function (output) {
     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
-    const duration = Math.floor(hap.duration.valueOf() * 1000 - 10);
+    const duration = Math.floor((hap.duration.valueOf() / cps) * 1000 - 10);
     if (note != null) {
       const midiNumber = typeof note === 'number' ? note : noteToMidi(note);
       const midiNote = new Note(midiNumber, { attack: velocity, duration });