I have a casio privia hooked up through a USB port. I recorded some midi. When I play back the midi, a patch change is sent to the privia of some sort. On the midi track, channel is set to "none," patch is set to "none,", and bank is set to ----. There is no patch change in the event list. It appears to be somehow resetting the patch that I already have on the Privia, so that it is playing the same thing in two layers (causing phasing/comb filtering type of sounds). This "phasing" effect shows up on all patches, as if something were being doubled, so maybe it isn't quite a patch change. Mystery to me. So far, I have only been able to kill it be turning the piano off and on. Any hints? Thanks.

If you have an instrument definition for your Privia try to add a patch change at the beginning of each track that is the patch you want that track to play. 

local echo off on the board?

Local echo off was what i was thinking too.

  Local echo.....can't find it in the PDF manual. Do you guys have any idea what else the manual might call it?

I think it's called local control.

  I think you guys were right.... I googled it, found something called "local control." Shut it off, so that the keyboard is not making any sounds, and sure enough, the midi playback does not cause the wierd sound problem. Not sure I quite understand what is going on, and a bit of a nuisance, as I have to turn local control on to record and off to playback, but it works.

Make sure you have midi echo selected on the midi track in question, this should remove the need to keep turning it on and off on the keyboard.

http://www.cakewalk.com/D...p;Req=Playback.34.html

  Thanks....somehow the Casio can layer the same tone twice. Under some circumstances, when you press the "layer" button it does just that. But the two layers are not identical, hence the phasing effect that kills the tone. (slightly out of phase).