Tonight I got the Audya to my home to have some fun and... I did some tests and figured out how live guitar part works... and it lost all its magic...

Other things:
1) USB to-device interface is 1.1 (at least my PC sees the keyboard as a 1.1 device, and takes forever to copy large files to and from Audya HD)...

2) Audio drums give a real "live" feel on style play but... many repetitions on styles, there are styles that have the same drums fill-ins and breaks... and the same guitar grooves, somewhat annoying... but I have to say... I heard real guitarists playing backing parts and they also were playing nearly the same grooves for similar songs....