Hello:
I don't know if any of the PSR3000/1500 / owners have notice that the Performance Assistance works really nice, it works when you playback a midi file as long as is made in a Tyros, PSR3000 and 1500....it does NOT work with any other Midi files....ONLY those I mention.
Playing the midi file with the melody.....( Performance Assistanse ON)...the keyboard adopts inmediatly the scales of the changing chords in use while playing...you can select to beguin a different sound than the melody, and you can strike ANY key and it will embellish the song playing.
This feature is for those that want to interact with a midi file that perhaps is or to difficult or simply, do not know that song.....and that way will not be WRONG notes.
I hope you enjoy it.

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mdorantes