MacOS – How to route system audio to specific channel on audio interface

audiomacossystem-prefs

I have a multichannel audio interface connected to my MacBook Pro by USB. I set the interface as the output device in System Preferences > Audio, and the system audio is routed to outputs 1-2. I want to route the system audio to channels 11-12, how can I do this?

In Audio MIDI Setup there is an option to use the device for Sound Output, but there is no way to specify which channels on the device to use.

I am using a 2013 13-inch MacBook Pro running macOS Catalina 10.15.7. The interface is a Soundcraft Signature 12 MTK.

Best Answer

After selecting the device for sound output in System Preferences, you must configure the speaker settings for the device in Audio MIDI Setup:

  1. Open Audio MIDI Setup
  2. Right click on the audio device and select Configure Speakers...
  3. Choose the configuration (e.g. stereo)
  4. Choose the channel destination for each speaker (e.g. left, right)
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