Reposting in a new thread as suggested: I'm trying to use Mainstage to host various Logic VIs with the MIDI coming from DP and the Audio returned to DP. I've set up Soundflower and the MIDI IAC and can easily get this to happen for one Instrument, but can't see how to get it to work at the Mainstage end for more than one. I have several MIDI tracks, each assigned to a different IAC MIDI channel, and AUX tracks in DP, each using a different Soundflower channel as its input. But I can't see how to get the instruments in Mainstage channels to respond to specific MIDI channels, or send their output to specific Soundflower channels. It seems all VIs in Mainstage respond to all MIDI channels, and all send their audio to channels 1-2 in Soundflower. Any pointers to where these items can be set?