HarlequinDevon

Hate to bump an old thread, but I just noticed that I am getting the same problem with the XW P1 I recently purchased. The strange thing is that it only is with the piano sounds, and only in the lower registers of the keyboard. The other synth sounds like the strings, flutes, ect are dead on, as well as the piano keys in after middle C. Why is it only the pianos that does this?