I had no gripe about the sound of the Ketron products ... just the playability and navigation. It has great bass, drums and winds ....... for starters, but I still think the polyphony issue needs to be re-addressed. You can't play 2 fisted piano/string parts and use the sustain pedal while anything else is going on .... and if the harmonizer is triggered .... it will SHUT THE VOICES OFF when the max is reached. Unacceptable for a singer.