I'm very curious about where you purchased the vinly. I had the vinly one time. I purchased it from a store in Brooklyn New York way back in 1977. The sound quality was pretty good.My favorite part of that concert was Rogers Drum solo. Pretty awesome for someone who doesn't like to do solos. I don't have the concert from that night, I have the one from the night before 3/31/76. If you want it, I can post it.