Chuck: When playing in arranger keyboard auto accompaniment mode, with the left hand required full time to trigger full chords and also be heard (left hand instrument sound) as well, the pitch bend & modulation wheels are totally useless, that's unless you have more than 2 hands. To solve the problem of adding pitch bend and vibrato in arranger auto accomp mode, Yamaha has begun incorporating pitch bend with key touch sensitivty instead. A great exampe of this is on the Tyros' "Aloha Guitar". - Scott