One of the best advances that sd9 has had with respect to audya is the boot time, at least when the sd9 crashes our audience only has to wait 1 minute to restart the keyboard and they can dance again, with the audya It gave them time to go have a good coffee until it was available again, bravo for ketron. it is a shame that a high-end keyboard like sd9 has so many bugs and the problem is that an update comes out and other things fail that previously did not. keep it up ketron and your end will be near, other brands that I don't know if they can be named here do less things but they do them well. It is like buying a car with many extras, paying a high price for it and then half of them do not work. more and more disappointed ketron customers, a great brand adrift.