OK - everything is working great, thanks to your help. Now, if I want to play the MODX instead of the acoustic piano on top of the backing track, how...

well, that makes sense. Should I be able to hear my piano from Mic in my headphones?

ok - all is working now but i need to mute the speakers connected to my modx but not the headphones (which i'm using to monitor). is there way to do ...

thanks for your assistance - i think i have it working; using headphones to monitor the backing track. Just need to work on the mix to get piano and ...

this is very helpful; i will try these setting and report back. Per your last comment on potential horrible feedback, is there a better way of accomp...