diff --git a/packages/core/util.mjs b/packages/core/util.mjs
index 9ab9bc7c..e8e40398 100644
--- a/packages/core/util.mjs
+++ b/packages/core/util.mjs
@@ -62,8 +62,8 @@ export const valueToMidi = (value, fallbackValue) => {
 };
 
 // used to schedule external event like midi and osc out
-export const getEventOffsetMs = (targetTime, currentTime) => {
-  return (targetTime - currentTime) * 1000;
+export const getEventOffsetMs = (targetTimeSeconds, currentTimeSeconds) => {
+  return (targetTimeSeconds - currentTimeSeconds) * 1000;
 };
 
 /**
diff --git a/packages/desktopbridge/midibridge.mjs b/packages/desktopbridge/midibridge.mjs
index 07a5f963..471c826e 100644
--- a/packages/desktopbridge/midibridge.mjs
+++ b/packages/desktopbridge/midibridge.mjs
@@ -1,5 +1,5 @@
 import { Invoke } from './utils.mjs';
-import { Pattern, noteToMidi } from '@strudel/core';
+import { Pattern, getEventOffsetMs, noteToMidi } from '@strudel/core';
 
 const ON_MESSAGE = 0x90;
 const OFF_MESSAGE = 0x80;
@@ -9,8 +9,8 @@ Pattern.prototype.midi = function (output) {
   return this.onTrigger((time_deprecate, hap, currentTime, cps, targetTime) => {
     let { note, nrpnn, nrpv, ccn, ccv, velocity = 0.9, gain = 1 } = hap.value;
     //magic number to get audio engine to line up, can probably be calculated somehow
-    const latency = 0.034;
-    const offset = (targetTime - currentTime + latency) * 1000;
+    const latencyMs = 34;
+    const offset = getEventOffsetMs(targetTime, currentTime) + latencyMs;
     velocity = Math.floor(gain * velocity * 100);
     const duration = Math.floor((hap.duration.valueOf() / cps) * 1000 - 10);
     const roundedOffset = Math.round(offset);
diff --git a/packages/midi/midi.mjs b/packages/midi/midi.mjs
index ef5c792a..3ce894d6 100644
--- a/packages/midi/midi.mjs
+++ b/packages/midi/midi.mjs
@@ -122,8 +122,7 @@ Pattern.prototype.midi = function (output) {
     //magic number to get audio engine to line up, can probably be calculated somehow
     const latencyMs = 34;
     // passing a string with a +num into the webmidi api adds an offset to the current time https://webmidijs.org/api/classes/Output
-    const timeOffsetString = `${getEventOffsetMs(targetTime, currentTime) + latencyMs}`;
-
+    const timeOffsetString = `+${getEventOffsetMs(targetTime, currentTime) + latencyMs}`;
     // destructure value
     let { note, nrpnn, nrpv, ccn, ccv, midichan = 1, midicmd, gain = 1, velocity = 0.9 } = hap.value;
 
diff --git a/packages/osc/server.js b/packages/osc/server.js
index 42722d28..7e0b9059 100644
--- a/packages/osc/server.js
+++ b/packages/osc/server.js
@@ -4,7 +4,7 @@ Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/st
 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/>.
 */
 
-const OSC = require('osc-js');
+import OSC from 'osc-js';
 
 const config = {
   receiver: 'ws', // @param {string} Where messages sent via 'send' method will be delivered to, 'ws' for Websocket clients, 'udp' for udp client