1. Put Logic in Multiplayer Mode
In Logic, choose Settings > Recording, and under MIDI, select Auto demix by channel if multitrack recording.
2. Set Each Controller Keyboard's MIDI Channel
Choose a MIDI channel for each controller, and refer to each controller's manual to see how to change the MIDI channel they transmit on.
You can skip that step if you're using an MPC or another external MIDI sequencer (where tracks already transmits MIDI data on their own channel).
3. Set Each Logic Track's MIDI Channel
In Logic, set each instrument track's MIDI channel parameter so they are triggered by the controller sending on that channel.
4. Record-arm each Logic track



