Never heard Initiation but I have a 65-minute album *somewhere* though it's soft piano music (in general classical has greater leeway), though it's from the '80s when the LP art was at its zenith. '70s sounds insane.
I'll have to turn in my music-geek card for this but how exactly does a producer put his stamp on an album? I mean I can tell different productions and different productions and how certain producers are sought out and all, but do they tell the artist how to play and dictate the arrangements, et al? How much give and how much take is there?