I use this configuration in my studio/rehearsal room. Roland VP770 (sitting atop my organ) midied to BK7m. I use the 770 mostly as a controller for the BK and as a vocal processor. Works great. Very easy to control, maybe because both are Roland products. The VP770 makes up for all the missing features of the BK7m and the BK makes a terrific drum machine with a few great solo voices (love the piano and brasses).