In the process of making his recent documentary Kurt Cobain: Montage Of Heck, director Brett Morgen was granted access to a trove of the Nirvana frontman’s home recordings and demos, most of them previously untouched and unheard. A few of them made their way into the final film, and now all of them are out in the world in the form of Montage Of Heck: The Home Recordings, which is being billed as an official Kurt Cobain solo album and released in both a 13-track version and a 31-track deluxe edition. We’ve already heard an early version of “Sappy,” the Beatles cover “And I Love Her,” and a 90-second “Been A Son” demo, and now you can hear the rest below.

Montage Of Heck: The Home Recordings is out now via Universal.