I've figured how to do all the above, minus the MIDI portion, by simply connecting the output of the Moog into the input of the OP-1, and then recording it in Logic as an Audio Track. If I'd like to record the MIDI data too, I presume I would need to use the External Instrument plugin, which I'm new to.
I've included screenshots of how I have it set up at the moment, the result of some googling and guesswork, in case I have some portions right, making it easier for you guys to explain what to do. The tracks set up: the one labeled "Sub 37 to OP-1 FX" is where I'm attempting to route the Moog signal to the OP-1 and the one labeled "OP-1" is where I'm guessing the audio should output with the effects, the end destination.
Also included is a second set of screenshots where I take different approach at setting it up. I have an External Instrument and I/O plugin assigned to my Sub 37 and OP-1's separate tracks, respectively, but without all the Send/Bus configurations from the first approach.
Info on my setup. Both of my synths are connected via USB to my Mac. The Moog is connected to input 3 of my audio interface and the OP-1 to inputs 1 & 2 (as its effects are stereo). Audio Interface's Output 1 & 2 are connected to my amplifier.
Thank you for any assistance.
One approach:
Another approach:
