Learned something recently that I really like about the mm - if you send multiple channels of midi, it will record them all at the same time to their assigned sequencer channel. For example, if you connect a midi controller transmitting a keyboard split on two channels you can play both sides of the split and have each go their own sequencer channel.
Also realized that after you assign midi cc’s to a track it will also record those incoming cc’s as p-locks. In the past, I would p-lock the mid cc’s on the mm and did not realize the mm could record them from the transmitting device.
As far as I can tell the midi sequencer on the octatrack will only record to the active channel - not on multiple channels at once.