983 - Iron Butterfly In-A-Gadda-Da-Vida 1968

The band was formed in 1966 in San Diego and released their debut album, "Heavy", in 1968, after signing a deal with ATCO, an Atlantic Records subsidiary. The 17-minute "In-A-Gadda-Da-Vida", the title track of their second album, The song is considered significant in rock history because, together with music by Blue Cheer, Jimi Hendrix and Steppenwolf, it marks the point when psychedelic music produced heavy metal. To wit, Blue Cheer's treatment of "Summertime Blues", Hendrix's "Voodoo Child (Slight Return)", and Steppenwolf's "Born To Be Wild" - whose lyrics contain the phrase "heavy-metal thunder" - have in common insistently driving rhythms that typify music of the heavy metal style.
A commonly related story says that the song's title was originally "In The Garden Of Eden" but at one point in the course of rehearsing and recording, singer Doug Ingle got intoxicated and slurred the words, creating the mondegreen that stuck as the title. However, the liner notes on 'the best of' CD compilation state that drummer Ron Bushy was listening to the track through headphones, and couldn't clearly distinguish what Doug Ingle answered when Ron asked him for the title of the song (which was originally "In-The-Garden-Of-Eden").