As I mentioned on my post the latest audya 4 os is a disaster and stay as that untill resolved and i can see ketron audya 4 has done his own testing and is legit.
To all ketron owners (keep in mind) that all models are different when it comes to operating systems and can not be comperable and not to forget to mention i used to own a ketron audya 5 also and have experience in both machines and i can tell you they are different