I don't think that you're on your good behavior here.
Ummm, I don't know for certain whether Adorno actually ever listened to Indian music, but he was a student--figuratively--of Max Weber and Weber's sociology of music does take up nonwestern music. Gad, I haven't read that since I was a sophomore so I'm recalling that it was something on the order of a rather universalizing account of the progress of musical development. Does anyone know if I'm right/wrong? So, on some level, Adorno must have known something--at least theoretically--about it and, I'd imagine, he may well just have been worldly enough to have heard it on occassion. Afterall, wasn't Adorno from a rather wealthy family. I really can't imagine that a wealthy German family didn't have exposure to such music, even if only for the purpose of exoticizing it.