As previously reported, an album of unreleased Kurt Cobain recordings is in the works, and more details have now emerged. In an interview with Kim Masters of KCRW's The Business, Brett Morgen, director of the new documentary, Montage of Heck, gave a little more insight into the project (via Billboard).

"I went into the archives -- this could be too strong a word -- I liberated a lot of material for the film," he said. "I finished the film and there was all this other music. No one asked me to do anything. I just started cutting the thing together and telling the estate they should put this out. Initially, I thought it would be a nice complement to the film." He then added, "I don't have any financial stake in the album." The recordings were pulled from over 200 hours of audio found on over 100 cassettes from the late Nirvana leader.

"I assembled it and passed it over to the various other people," Morgen continued. "It feels like you're in Kurt's house, watching him create. You're eavesdropping on him … in the most positive sense of the word, with a great deal of sensitivity, too."

Kim Masters' complete interview with Morgen will be shared tomorrow, May 8; get more details on The Business here.

Worst to First: Every Nirvana Album Ranked

You Think You Know Nirvana?