Has anyone midi’d up an arranger to a digital piano? Can you play the arranger left hand on the piano? I’m thinking Yamaha p125 with s975. Any thought?
  ABSOLUTELY! My SV1 controls the PA4x just as if the 4x had a weighted 73 note keybed. I use it like this often, but mostly, I play them separate. The slight reach to the 4x is very comfy, and gives me full 73 note Rhodes, under a solid bass, drum and "color" sound (organ, brass etc) up top.