Hey,
the A1 works perfect on any midi configuration:
- make sure one of your maschines is master (-clock) device, which sends from midi-out to A1’s midi-in. (A1 detects external clock, otherwise it switches to internal)
1a. I recommend OT as master, switch clock send on.
- A1 uses global- and slot-midi. Make sure that global-midi-channel corresponds to the channel of your master device, i.e. Ch1 A1 = Ch1 OT = i.e. track channnel you want to send notes.
2a: shift+midi = Gx, the global channel, must be the same number as OT’s channel you prefer.
- Receiving on global channel, the A1 plays notes only on active slots. If you want to use A1 multitimbral capabilities you could adress each slot with its own midi-channel-number (Slot 1 = 3, Slot 2 = 4, etc)
I’m not sure how you send midi from your mac (interface, DAW, App) but it follow the same scheme.