“I got a call one day from John Hammond, one of the real legendary men in the record business: ‘Bob is coming back to Columbia Records, and I want you to be a part of it.’ It turned out to be the best four days of what Bob Dylan does, which is he wanders from song to song, sometimes coming back to the first one. Other than changing the roll of tape, you just had to let it all happen.

“It’s what I learned in my early days: You have to keep your ears open and be receptive to what’s happening even in the beginning stages. If you listen to the album, you can hear his pick hitting against the mic or something else happening. One of the guys in the room turned to me and said, ‘Did you hear that? Aren’t you going to fix it?’ I told him, ‘When we take a break – maybe.’ You don’t mess with Bob’s performance.”