The ability to store and output at least one continuous (across bb drum-sections) midi track on another midi channel, i.e. having bb drums on channel 10 and using onother channel for the additional track. The sync for this output would be the midi clock from the Start message, provided that the midi clock is running across any Pause the user does during his performance. The channel output should be muted during Pause and reenter on the next available first beat (compensating for slight user timing errors) same as how the drums does.
This could be very usefull for bass and comping as well as midi triggering.