I can’t believe this was under my nose all along and I totally didn’t clue in… Who needs rewire when you run OS X? I’m now routing midi signals into Garageband from Renoise. Renoise is my sequencer and Garageband is my instrument. Hooray.
Using the Inter-Application Communication (IAC) driver
You can set up the IAC driver to allow MIDI applications to transfer information to each other. For example, you might have a MIDI keyboard application send its MIDI data to another MIDI synthesizer application.
To use the IAC driver, you turn on the driver, then specify the number of busses you want for your applications. Each bus (sometimes referred to as a port) provides a source and a destination which will appear in your MIDI applications. You then specify that one application use the bus as destination and another use the same bus as a source. For example, one application sends information to Bus 1 as a destination and another application receives that information from Bus 1 as a source. Thus, one application sends information to a bus and another application receives data from it.
To configure the IAC driver:
- Open Audio MIDI Setup.
- Click MIDI Devices.
- Double click the IAC Driver icon.
- In the IAC Driver Properties dialog, click the “Device is online” check box to turn on the driver.
- If you want to configure the connections, click More Information then click Ports.
- If you need more than one bus, click Add Port to add the busses you want.
- Specify the number of MIDI in and MIDI out connectors for each bus.
- Click Apply.