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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 — matches Note On/Off, Program Change, Control Change, or SysEx messages, depending on what you’re triggering from.
  • MIDI Send actions in Automation View — sends the same message kinds to a connected MIDI destination.
  • MIDI-based scene recall workflows — Yamaha consoles in particular map incoming MIDI Program Change numbers to named console scenes, organized into scene banks, so a MIDI Send action can recall a specific named scene rather than just firing a raw Program Change number.
  • Timecode display workflows — Relay includes a built-in MIDI timecode parser for the Timecode module and DAW Transport’s timecode display mode.
  • 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.