It doesn’t sound like a herculean effort, but it took a lot to get ten Bruce Springsteen albums on to iTunes.

Billboard says that audio engineer Bob Ludwig was behind the project and it included switching five of the albums to digital from the analog format. It seems like a simple process, but it’s not. It’s too much to explain here, but it has to do with comparators and binary counters. It will make your head spin. It takes a while, plus if you’re picky like an audio engineer is, it takes even longer.

iTunes users can now download the digital remasters of Born in the USA, Born to Run, Darkness on the Edge of Town, Greetings from Asbury Park, N.J. and The Wild, The Innocent & The E Street Shuffle. Bruce’s latest four albums also went to iTunes as did his Pete Seeger tribute.

All ten are available for download now.