Nirvana are one of those bands that only come around once in a lifetime. Now you can listen to an all-new and never-before-heard demo song entitled “E-Coli” from this iconic 90s band.

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The song is a (roughly) 9-minute long demo that was first heard by the public in the official documentary about Nirvana frontman, Kurt Cobain, entitled Kurt Cobain: Montage of Heck. The band hasn’t released an official tune since 1993 so I’m pretty sure fans are head banding their necks off right about now. Based on a note that is featured on the stream, the song was probably recorded around 1993/1994 and could possible have been part of a new album. Director of Montage of Heck, Brett Morgen stated that:

You really get a sense of how happy he was simply by creating himself. His lyrics are really playful, and, at times, you can feel his smile and warmth coming through.

The song is obviously very unpolished and raw, but that’s kind of what I like about it. The official soundtrack for Montage of Heck will be released in November 2015 which will feature many more never-before-heard demos and remastered and remixed songs from the greatest band of our time.

Check out the trailer for the documentary about Kurt Cobain: