The website Dangerous Minds has discovered a rare 1988 Nirvana
demo called Montage of Heck,
where Kurt Cobain recorded on a four-track. The demo or mixtape also features a ton of samples by artists like Metallica, The Beatles, Van Halen, James Brown, William Shatner, Queen, Led Zeppelin, Butthole Surfers, Jackson Five, Fank Zappa,
and many more. Take a listen!