Trilogy is the third studio album, released in 1972, by the British progressive super group Emerson, Lake & Palmer (ELP).
Previous to Trilogy ELP had already released two very successful studio albums: Emerson, Lake and Palmer (1970) and Tarkus (1971).
One of the most famous tracks on the the the album is The Endless Enigma. It consists of three parts: Endless Enigma pt. One, Fugue and Endless Enigma pt. Two. Endless Enigma Part One has an intro that consists of only of the moog, bass drum and piano. It opens with the sound of a beating heart, an effect created by the bass drum of Carl Palmer’s Ludwig Octoplus drum kit. You might be interested to know that this effect was invented by Mr. Palmer before it was used on Jethro Tull’s A Passion Play in 1973.
Trilogy cover was created by Hipgnosis.