Any bit of unreleased work by Nirvana frontman Kurt Cobain is just another glimpse into a world of one young man's passion for making music. In a recently discovered tape that the singer made in 1988, it's evident that there was more to Cobain than what would come a year later with his band's first release, Bleach.

The people over at Dangerous Minds found and shared a mixtape of sorts titled Montage of Heck. A 21-year-old Cobain used a 4-track cassette recorder to patch together sounds from his "wide-ranging collection of LPs, manipulated recordings of the radio, elements of Nirvana demos, and sounds created or recorded by Cobain." At 15 minutes long, there is a plethora of noises, including samples from The Beatles, James Brown, Cher, William Shatner and The Butthole Surfers. Cobain also included some onstage rants from Jimi Hendrix, Mike Love of the Beach Boys and Paul Stanley of KISS. Check out the recording below, followed by a complete list of sounds courtesy of United Mutilations.

Possibly the most impressive aspect, as DM points out, is that Cobain did all of this in a pre-YouTube and Spotify world.

Montage of Heck Mix List
 “The Men In My Little Girl’s Life” by Mike Douglas
“The Sounds of Silence” by Simon & Garfunkel
“Being for the Benefit of Mr. Kite!” by The Beatles
“A Day In The Life” by The Beatles
“Eruption” by Van Halen
“Hot Pants” by James Brown
“Gypsies, Tramps and Thieves” by Cher
“Go Away Little Girl” by Donny Osmond
“Rocky Mountain High” by John Denver
“Everybody Loves Somebody” by Dean Martin
“The Candy Man” by Sammy Davis, Jr.
“In A Gadda Da Vida” by Iron Butterfly
“Wild Thing” by William Shatner
“Taxman” by The Beatles
“I Think I Love You” by The Partridge Family
“Are You a Boy or Are You a Girl?” by The Barbarians
“Queen Of The Reich” by Queensryche
“Last Caress/Green Hell” covered by Metallica
“Whole Lotta Love” by Led Zeppelin
“Get Down, Make Love” by Queen
“ABC” by The Jackson Five
“I Want Your Sex” by George Michael
“Run to the Hills” by Iron Maiden
“Eye Of The Chicken” by Butthole Surfers
“Dance of the Cobra” by Butthole Surfers
“The Shah Sleeps in Lee Harvey’s Grave” by Butthole Surfers
“New Age” by The Velvet Underground
“Love Buzz” by Shocking Blue
Orchestral music from 200 Motels by Frank Zappa
“Help I’m A Rock” / “It Can’t Happen Here” by Frank Zappa
“Call Any Vegetable” by Frank Zappa
“The Day We Fall In Love” by The Monkees
“Sweet Leaf” by Black Sabbath (intro)
Theme from The Andy Griffith Show
Mike Love (of The Beach Boys) talking about “Transcendental Meditation”
Excerpts of Jimi Hendrix speaking at the Monterey Pop Festival
Excerpts of Paul Stanley from KISS’ Alive!
Excerpts of Daniel Johnston screaming about Satan
Excerpts from sound effects records
Various children’s records (Curious George, Sesame Street, The Flintstones, Star Wars)

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