Scott: The Px-360 fails repeatedly on the 3 or 4 midi files I played with to day. I have attached an old midi file I have generated. If you open this file in a notation program you will see strings, guitar, piano etc plus a drum line, There are notes on the drum line that are sent as channel 10 in the midi stream, By definition GM channel 10 converts these notes into percussion instruments i.e. bass drum. snare drum, cymbals etc. . My Px-360 plays the the musical pitch of the notes that were written. I should hear percussion sounds instead. Consider the following. When I play the score everything is ok but channel 10, is screwed up. However, if I power the Px-350 off, and then turn it back on, while the score continues to play, the PX-360 will play the channel 10 drum line properly till the end of the song. If I play the song again, the PX-350 will again screw up the channel 10 drum line. I think some engineer at Casio goofed. I am a retired PE Electrical Engineer and now a Duffer Keyboard player Bob Stiffler DrinkingFmSauceJammerArr1.mid