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Relay can receive and send MIDI on Mac.

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Enable MIDI receive

  1. Open Relay > Settings.
  2. Select External Control.
  3. Switch to MIDI.
  4. Turn on MIDI Input.
  5. Choose all sources or a specific input.
  6. Refresh the device list if a device was just connected.

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Use MIDI in Relay

  • MIDI Receive triggers in Automation View
  • MIDI Send actions in Automation View
  • MIDI-based scene recall workflows
  • Timecode display workflows
  • DAW Transport module workflows
The External Control page also shows message counts and the last received MIDI event, which makes it much easier to verify routing before you build an automation.

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Troubleshooting

If MIDI triggers do not fire, confirm the correct input source is selected and that the sending device is emitting the message type you expect.