The Pro One uses a 6-bit DAC, admittedly just for the keyboard, one step per semitone. On 4/10/2015 2:24 AM, Rick Jansen wrote: > > Even an 8-bit (ZN426) DAC would have been good enough, it will give you 256 discrete voltages. If you choose the reference voltage and scaling right you will end up with a 83.3 mV per note characteristic.. > > Rick