My main thing with the D-Beam is to mute all ACC Parts, drop down to just drums and bass. Very handy if playing piano!

Is there a bright light shining into the D-Beam? Is it possible to locate the lights away from the BK? I’ve also noticed some difficulty with the D-beam if another keyboard is above it, fairly close. It likes about 4” of clear space…

I believe the codes for Part Mutes are sys-ex, they should be in the MIDI Implementation .pdf on p.4.

Another thing I like to do is use the Track Mute button to mute ACC1, which is usually the piano Part (iirc). That way I can play straight piano for a tune’s head (and run the chord sequencer to record the chords), then start the chord sequencer and turn on ACC1 (to pick up the piano ACC) with the Part Mute sw. and I can switch to a lead sound (saxes, jazz guitar etc) to solo without the piano part being missing.

BTW, don’t forget to try playing full piano with the Dynamic Arranger turned on… Used subtly, it’s great for getting some life into the drums and guitar Parts if they change samples as you play harder!