On a cluster of notes, . B through D below middle C or thereabouts, If I hold the note for even a moderate amount of time, the tone changes into a loud and high pitched PING. At a job and in desperation, I sprayed the keys with keyboard duster and stop the sound temporarily, but it comes back. Anyone have any ideas.? I love the keytouch and acoustic pianos on this box and would appreciate a straight controller based on this original model.
Thanks a lot.