While preparing Kurt Cobain: Montage of Heck, the forthcoming documentary about the Nirvana singer, director Brett Morgen sifted through dozens of Cobain's personal tapes. Now, an album culled from those home recordings will be released this summer, as Morgen told Bedford + Bowery.

When asked by Bedford + Bowery if he uncovered any particular highlights amongst Cobain's archives, Morgen responded, "We’re going to be putting out an amazing album this summer that I think will answer that question." He also said the album "will feel like you’re kind of hanging out with Kurt Cobain on a hot summer day in Olympia, Washington as he fiddles about. It’s going to really surprise people."

He added: "Just to be clear, it’s not a Nirvana album, it’s just Kurt and you’re going to hear him do things you never expected to come out of him."

Later in the interview, Morgen said he found 107 cassettes featuring 200 hours of "never-before-heard or rarely heard music." He also said the tapes contain jam sessions with Courtney Love, jam sessions with friends and Nirvana, demo tapes, demo tapes with his punk band Fecal Matter, serious and un-serious spoken word material, covers of the Beatles, sound effects, sound design, and more.

You can read the entire interview here.

HBO will air Montage of Heck on May 4. It is screening in select theaters now.

Read our review of Montage of Heck from Sundance.

Watch the first trailer for Montage of Heck: