In this talk, starting from 55:35, Barry starts talking about his way of playing the major scale which makes the most sense to him (with the added #5)... He says "the major scale is actually 8th degrees and [in fact] should be 9".
I am somewhat familliar with his diminished concept, and his way of playing the major scale makes sense to me, but I can't get over my curiosity to know about the 9 degrees version of this scale, and what can ensue from it, imo I think that it can only be performed in some specefic true temperament tunning mode, because I don't see personally why he wouldn't have played it if it were just within the 12tone ET system.
I haven't heard him mention this anywhere else and I'm curious to know whether anyone knows more about this? any lead would be of great value