21. Audioslave - (Self-Titled) https://www.youtube.com/watch?v=KDMvN45sjo4 Remember the first time you heard Cochise's intro? That crazy mechanical whir of noise that we were all convinced a guitar was making, but at the same time appeared to be some after-studio effect conjured up by a demonic Harley Davidson left rattling away during recording? Instead it was the return of Rage Against The Machine's guitar-professor Tom Morello, using a combination of delay effects and the thwack of pen on his strings to bring about the uniquely dissonant sound. It doesn't stop there though, and with many 'Slave fans still pointing to this debut as the finest in the band's catalogue, the subsequent metallic chug of Show Me How To Live carries things perfectly, before Morello's iconic pedal-wizardry produced the psychedelic-soloing of Like A Stone, and the absurdly mad scientist-aping cacophony of noise that is Bring 'Em Back Alive's solo section. That's all without mentioning the Robert Plant-esque vocals of Soundgarden's Chris Cornell; one of the progenitors of grunge who wields a voice so malleable to any genre or tone he soars to near-unmatched heights throughout, as well as performing vocal acrobatics on the likes of Gasoline that see him tap his throat whilst changing pitch to imitate the sound of a post-production remix on his voice. It's impossible to get sick of: Cochise. With one of the most sonically-pleasing riffs ever committed to recording equipment in the new millennium, it has a timeless bounce that takes on a whole new lease of life should you ever try and learn it.