Comment by dhosek

I remember a friend managed to get a copy of a real book in the 90s and was so excited about it. When I sat down to play some tunes out of it, I was unfamiliar with the notation where Cmin7 was written C-7 and CMaj7 was C△. I figured out the latter, but thought the former was Cdim7 which led to some weird harmonizations before I figured it out.