Hi Scott,

If this was happening on your KN6000 could you be using a setup that was saved using the KN6000?

I had a bitch of a KN6000 which would make all kinds of peculiar sounds but mostly would just shut down for no reason. (Very embarrasing when playing for dancing as it left the people dancing to 'silence' and I'm sure they didn't believe me when I tried to explain the keyboard was "playing up again") However to get back to your problem, from time to time when I was using a KN6000 setup, I would hear the same peculiar sounds so I took all my KN6 setups, loaded them in the KN7 and re-saved them - problem solved!

Hope this helps.

Aud (U.K.)