The album will go on sale alongside the DVD release of "Montage of Heck," filmmaker Brett Morgen told Deadline's AwardsLine.
In reviewing Cobain's archives for the documentary, Morgen discovered "hours upon hours of never-before-heard Cobain music" and other materials, some of which will be included in the November 6 release.
Fans have been salivating over the prospect of new Cobain music since Morgen dropped news of the discovery in May.
He told AwardsLine
he's still astonished the music hadn't gotten out in the 21 years since Cobain's 1994 suicide.
"I could not possibly understand how this existed and nobody had encountered it before," Morgen said.
Morgen told the New York online magazine Bedford and Bowery
in May that the 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."
reported last week that the release will include audio montages, recordings of Cobain talking and "a sketch comedy routine featuring Kurt voicing all of the characters."
A 12-minute acoustic track will also be included.
The material ranges "from thrash to ragtime and everything in between," Billboard quoted Morgen as saying. Though it's not a Nirvana album by any means, Morgen said, "Most of it is in a space that will be familiar to Nirvana fans," according to Billboard.
"These are all just Kurt by himself with the guitar," he told Billboard. "These aren't multi-track, finished songs or work-ups, but they're extraordinary, and I think they provide a tremendous insight into his (creative) process. I think they further our understanding of Kurt, both as a musician and as a man."
"Montage of Heck"
was released on HBO and in theaters in May. It has been nominated for three Emmys.