The director of Montage of Heck announces the release.

In an interview with Bedford + Bowery (via Pitchfork), director Brett Morgen says he’s not done with the Kurt Cobain archives that he used to help create the authorized documentary Kurt Cobain: Montage of Heck.

Asked if there were any still-unreleased “gems” from the Cobain archives, Morgen said: “We’re going to be putting out an amazing album this summer that I think will answer that question,” explaining that an album of home recordings “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 continues: “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.” As previously reported, the documentary features previously-unheard Cobain originals.

Kurt Cobain: Montage Of Heck is in select theatres now and will debut on HBO on May 4.