Black Sabbath (1973) Who Are You‏

 Based around a Martian sounding Moog synthesizer lick, playing a simple three note pattern, you'd think this was an oddity in Sabbath's canon but actually they busted out the synths,acoustic guitars, Mellotrons and even flutes quite regularly during their semi- progressive phase in the mid 70s.

 Ozzy sings with himself backing him up, it soon gets weirder as it takes a detour wherein Tony Iommi plays a sombre piano progression with a Mellotron backing; while the Moogs play a nice lead line over it that builds up into a bolero before returning to the main riff again. Now with the two acid drenched Moogs playing in each channel, the stereo quality of the track with the echo threshold ringing out in each ear is mind altering to say the least.  The warped effect of the synthesizer sucks you in and combined with Bill Ward's doom laden beat and Ozzy's stricken vocals means this works without the standard Iommi fuzz tone. It ends on a dissonant oscillating fade out; it's Black Sabbath going Sci-Fi!

 Embracing new technology and diverse genre shifts to get across their own message that is more likely about the threat of governments or nuclear weapons rather than the you know..Satan. It sees them at their most adventurous with a Yes like mid section symphony, heavy on the keyboards but with that Sabbath patented despair and destruction all over it. Its similar to another paranoia based track, 1975's Am I Going Insane which shares a similar melody, the two part harmonies, the Moogs and the bolero rhythms.