Recently I've noticed an unusual behavoir in my ZR76 keyboard. Some of the sounds, such as Suitcase EP, P-Bass, and Switch Pop 1, produce a background ticking noise. This noise sometimes pans back and forth. I've tried reinitiallizing the keyboard, but that didn't solve the problem. The internal effects don't cause the problem either because when I bypass the effects, the background noise still occurrs. The connections don't cause the problem, the ticking is noticable through headphones and an amplifier. I contacted Ensoniq Tech support, but they weren't of much help. Has anyone experienced, or heard of, this type of problem with the ZR76 Keyboard? Any suggestions are appreciated. Thank you.