PA3x? I sold them both .... can't get used to having no speakers. It's my Achilles heel. I'll play a keyaction that I admittedly hate, rather than one I love, and have to deal with a silent slab. Go figure. Dennis - I'm going to give the H-M one more try ... I had the RH set to just "UPPER" for midi transmit, filtered all CC's, and SysEx, turned off all things that could confuse it ... just never responded right to full chords - it seems fine with the arranger trigger though. A puzzlement.