Hi, I'm asking on behalf of a friend - she has a Kawai midi-enabled keyboard, and a laptop. I'm wondering is it possible to have a midi-controlled-pc-based synthesizer? Like a rackmount synth, only on PC. I take it softsynths can be MIDI-controlled, and hence be used for this purpose? We'd like to hook the Kawai up to laptop at rehearsals, and all the samples be stored on there and played in real time through the computer, back out and into the keyboard again?