Hi there-

I use my AK this way, and 2 Bit is correct.

First set the Autochannel of the A4 and the MD to the same thing. Also set each box up to receive program changes and transport.

Then set the OT up in MIDI/SYNC/Prog ch by ticking the “send” box, then selecting the channel number that you picked for the other 2 boxes.

With all that set up correctly, your whole rig should move from pattern to pattern along with the OT’s arranger.