"Prince would walk in the studio at the beginning of the day and he’d walk out with “1999,” done. Michael, we’d spend a day just on the volume of the handclaps. I mean, literally. And we’d turn them up and he’d say, “Okay, I’ll come back tomorrow and we’ll listen to it again.” We come back the next day, and he’d go, “Can we turn that up just a little more?” Yes, we turn it up. “Okay, make me a tape.” Okay. “I’ll come back tomorrow and we’ll listen again."