Bruce told Rolling Stone Magazine this four years before the set was released:
“We record a lot of material, but we just don’t release it all… I always tell myself that some day I’m gonna put an album out with all this stuff on it that didn’t fit in. I think there’s some good material there that should come out. Maybe at some point, I’ll do that.”
Bruce Springsteen to Mojo Magazine:
“So it began just with that idea and we listened to about 250 songs, maybe more, I made quick notes in a notebook and put it away. A year went by, more maybe, and I came off the Tom Joad tour and I began to write acoustically again and I wrote about half a record. Then I got stuck and said, ‘Well, I’m going to put this aside for a while.’ Then I wrote half of an electric record, and hit the same place. So I thought, instead of waiting for another year to put something out I’ll put some of this music together. So once again I went back to the archives.”
He told Billboard that the songs were chosen from 2-300 songs. A legal battle concerning the rights to Greetings from Ashbury Park NJ sessions, made these tunes unavailable for release.
The Tracks Box set was inteded as a 6 cd release, but it was cut down to 4 cds before the official release. This means that there’s still a ton of unreleased songs in “The Springsteen Vault”. The rumours of a second Tracks box set is strong on the web.