I really feel for the people that have bought the Audya and have had nightmarish problems. These same people,however, have helped me learn the OS, for which I'm grateful.
In my case, hopefully, I am trouble free. I do know that some of the problems were prior to the latest update, and the process of updating. I bought mine with a factory update and just love the thing.
I thought long and hard whether to buy a more mature OS, but felt the sound and features were worth the gamble, knowing that Ketron would eventually get the bugs out.
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact