I haven't researched this much yet, but I'm wondering, since the BK-7M has only midi in and out, and my current Edirol controller only has one midi out, how I'm going to feed the chord signal to both the module and the outboard vocal harmonizer.
I see that there is a mode on the module to redirect the midi in back to a piano-type controller from the midi out so that the sound from the controller can play. I hope it is indeed a facility to make it a pseudo midi thru--in other words pass the chord signal through to the vocal harmonizer.
I also see that Roland has a new 61-note controller that has pads to which you can assign drum sounds. This would allow something similar to multi-pads except they would just play drum sounds when you hit them. That's mostly what I used multi-pads for anyway.
I'm also wondering how it would be to direct the signal from the vocal harmonizer into the aux inputs on the module, thus eliminating the need for an external mixer.
So many possibilities!
DonM