There is no sound due to an error in the DSP chip. It's possible to purchase a set including the v3.03 chip and the main panel from the manufacturer, but you might be able to get just the chip if you negotiate with Roger Linn himself (this is because when I previously inquired about this DSP error with the manufacturer, Roger Linn himself responded via email and offered to mail just the chip and refund $30 upon return of the faulty chip. Several years have passed since that exchange, so I don't know if he still offers the same service, but I'm providing this for your reference). No claims and no returns, please.