MIDI control: Just purchased a Beat Step by Arturia. Need to control tempo from 65 bpm to 185 bpm (don't need more) and NRPN and PRN was offered. Have zero experience with those two and not at all sure if they are even needed or necessary. The machine's range is from 40 to 300 bpm. The MIDI messages will be received by a Beat Buddy. Already figured how to change songs and control the volume, just need to regulate tempo SOME times, not ALL the time. What to do, oh my! What to do.