He engineered artists such as Ray Charles, Peter, Paul & Mary, Bill Evans, Herbie Mann and Duke Ellington.
[2] Schwartau worked for NBC, Decca, Coastal Recording Studio (which dissolved in 1959),[3] and Music Makers.
[8] According to his son, Winn, Schwartau worked on developing the oscilloscope and on radar systems in the military.
[15] The first major album recorded at the studio was The Genius of Ray Charles, which was engineered by Tom Dowd and Schwartau with Phil Ramone as "third assistant.
[18] He also engineer the influential jazz album Money Jungle with Duke Ellington, Charles Mingus and Max Roach.
Since that wasn't allowed by the company, Mary was reassigned to the 4th floor (where she was the broadcast engineer and editor for the nightly news).