The project receives the mixed audio of Ableton at channel 1. Ableton is used as a playback machine only, so the main mix will occur in scope. For sending audio data from Scope to Ableton, the Micromixer is used to allow the selection, which sound is sent to Ableton.  If scope and Ableton are both configured for listening while recording, a feedback loop might show up. So you may need to mute undesired sources. The Prisma synth can either be fed by external MIDI input of Scope or Ableton. A MIDI destination to feed from scope to Ableton is not wired in this project yet. Note: If Ableton is not used on the Scope machine, it can also work with an ADAT interface connected to Scope/Xite.