DAVID Z: He did all the instruments. He had a little cassette machine into which he’d hummed each part. The horn part, the guitar part — he had it all separated. It was really evolved. He was 16, 17 years old. When anyone came in the studio while he was singing, he wanted me to turn the light off because he didn’t want anybody to look at him. [My wife] came in while he was singing “Soft and Wet,” and he was a little embarrassed. He got over that shyness, that’s for sure.