My figures only cater for using the unit as a means to play back styles, not right hand sounds or even a Lower Left hand sound.

In the case of using it with a Mediastation, this is no problem at all. The Styles can be routed to the SD2 and you can just use Giga sound for the lower and upper parts you play yourself.

Using the SD2 exclusively on a laptop and a controller keyboard as the only sound source is a different matter. 32 Notes there won't get you too far it your playing chords or using a sustain pedal.

Regards
James