The CueMix software for your MOTU audio interface is essential for setting up and controlling monitor mixes during recording sessions or live performances. What if you want to include audio output from iTunes, web-browser, or other application in your monitor mix, alongside your hardware's inputs? Doing so would allow you to mute, solo, mix, and pan your computer's audio output with the rest of your live inputs, controlling it all from the CueMix on-screen mixer.

If your MOTU interface has S/PDIF digital I/O, take a S/PDIF cable and connect the S/PDIF output jack directly to the S/PDIF input jack. This creates a loop (out to in). Or, if your unit does not have S/PDIF, you can use any other digital output/input pair. On Mac, open the MOTU Audio Setup application and set the "Default Stereo Output" option to "S/PDIF 1-2." On Windows, choose "S/PDIF 1-2" as the default Playback Device in your Windows Sound Control Panel. This sends your computer's audio output to the S/PDIF output on your MOTU audio interface, which you have directly connected to the S/PDIF input.

In CueMix, the S/PDIF input channel strip carries your computer's audio stream; unmute the channel, and mix it alongside your other live inputs. Check out the METERS tab, as the picture shows. The computer's output signal appears as S/PDIF input and output. In addition, when the S/PDIF channel is unmuted in the MIXES tab, the signal also appears there, too.