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Relay can receive and send OSC messages over the network.

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Enable OSC receive

  1. Open Relay > Settings.
  2. Select External Control.
  3. Switch to OSC.
  4. Turn on OSC Listener.
  5. Set the listen port.
  6. Point the sender at this Mac’s IP and that same UDP port.

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Use OSC in Relay

  • Use OSC Receive triggers in Automation View — set the address pattern you want to match (for example /relay/trigger1), and the trigger fires whenever a message arrives at that address.
  • Use OSC Send actions to transmit a message to a target IP and port (defaults to port 9000) at an address you define.
  • Use OSC from Button modules when configured.
Beyond the main OSC listener, Relay can run additional custom listening ports at the same time — useful if you want to keep OSC traffic for different purposes (say, a console integration vs. a lighting console) isolated on separate ports rather than sharing one. The External Control page also shows the current IP address, message counts, and the most recent OSC packet so you can validate traffic before wiring it into a graph.

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Troubleshooting

If packets do not arrive, confirm the sender IP target, port, Local Network permission, and that no other app is already bound to the same port.