Overview
The MX-1 allows for comprehensive routing solutions based on a variety of situations. In Mixer mode, the MX-1 combines the AIRA products, plus other hardware that is connected to the MX-1. It also combines a computer.
Regarding Channels
Dependent on the connections made to the MX-1, you can route several tracks of DAW audio to different channels. Channels "Digital" to "PC" can receive audio feeds from your DAW, as long as there are no connections made to those channels. In your DAW, you would route the outputs of your tracks as follows:
Output 7/8 -> Digital
Output 9/10 -> USB 1
Output 11/12 -> USB 2
Output 13/14 -> USB 3
Output 15/16 -> USB 4
Output 17/18 -> PC