I can feel the frustration you and others are having, especially the Audya 4 users.

Even with the Audya 76 I find the manual is very detailed in what they cover, but there are things not covered.

Maybe I am being optomistic, but am thinking Ketron was so intent on getting their product out and workable, and they put out a basic manual. I don't think that they don't care as much as priorities, and those of us with problems have different ones than they.
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact