Thanks guys, you have given me a good starting point. I have download “Studio One 2” as its a good DAW and its free. I will be using it to create MIDI backing tracks using the Groove Chart and drum track on channel 10. The resulting midi file then plays on my keyboard. I suppose that there is no reason why you can’t generate .WAV files using the limited set of instruments supplied (after all it was the free version I downloaded so a limited number of instruments).