Ah. okay. That makes sense. I did a Google on opamp and it seemed they had a ton of uses.

I don't know why, but "Burr-Brown" has stuck in my head since I was in the Mk1 queue. I think I had a Sony MD player that advertised its BurrBrown DA convertors and I saw a reference to BurrBrown in some of the WAY old empeg advertising. I must have assumed that it was also for the D/A process.