Director Bret Morgen had to do an ample amount of research to pull off his newest documentary "Kurt Cobain: Montage of Heck." That research included listening to previously unknown home recordings of the Nirvana singer.

Morgen revealed to Bedford + Bowery on Friday that the recordings he listened to will be released as a Kurt Cobain album this summer.

"We're going to be putting out an amazing album this summer that I think will answer that question," he said when asked if any of the recordings stood out to him. Morgen added that 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."

The recordings do not include other members of Nirvana and will surprise fans of Cobain, according to Morgen.

"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," he said.

Also among the 200 hours of rare recordings Morgen found were sessions with Courtney Love, Nirvana demo tapes, spoken word poetry, covers of Beatles' songs and demos of Cobain's former band Fecal Matter.

"Montage of Heck" airs May 4 on HBO and is screening at IFC Center in New York through this Sunday.