MIDI

Overview

Fantasynth supports MIDI input via the Web MIDI API. Connect any class-compliant USB MIDI controller. No drivers needed in Chrome.

Enabling MIDI

MIDI is off by default so the browser does not ask for permission on first load. To turn it on:

1. Open the menu Settings panel from the toolbar
2. Select the piano MIDI tab
3. Flip the Enable MIDI toggle. Your browser will ask permission the first time

Once enabled, the setting is remembered between sessions. Disable it any time from the same toggle.

Connecting a controller

1. Plug in your MIDI controller before or after opening Fantasynth
2. With MIDI enabled, the app detects available devices automatically
3. A green status dot appears in the UI when a device is connected

Triggering clips

Pads on your controller map to the clip grid. Press a pad to launch the corresponding clip.

Track faders

Faders on your controller map to track faders in Fantasynth. Move a fader to control the intensity of that track.

Supported controllers

Fantasynth currently ships with support for the Akai APC mini MK2. Plug it in and it is recognised automatically. More controllers will be added over time.