I do not believe that the harddrive size on Genesys allows for multiple audio tracks. Therefore, I believe that audio recording is intended simply as one stereo track that represent the audio of all the midi track at once. Now that is useful if you want to make a very quick demo. I do that all the time.
But for those who DREAM or think they want to use multitrack recording of audio, please research construcing a DAW or buying one of those korg/roland/tascam machines.
I have constructed a studio at my home and I use Cubase SX and Wavelab to do that.