Multitrack record/play

Hello
Simple questio, I want to record or playback in multitrack
Exemple:
Track 1 Channel 1 usb host + effect midi out A channel 1
Track 2 Channel 2 usb host + effect midi out A channel 2

It’s ok for me to record on external sequencer, but then when I want to play back with usb it is not OK. I want it to go to OutA with correct channel, both at the same time.
Then how do I do if I got for exemple track 2 on channel 6 ?
Thanks for your help