MIDI In / Out
Use the Web MIDI API to play the built-in synth from a hardware controller, route MIDI through to other devices, and watch every message in real time.
Connect a MIDI controller, then grant access. Notes route to the built-in synth and any selected output.
Inputs
No MIDI inputs detected.
Outputs
No MIDI outputs detected.
On-screen keyboard
Monitor
No MIDI messages yet.