Goblin are an Italian progressive rock band known for their soundtracks for Dario Argento films (including Profondo Rosso (Deep Red) of 1975 and Suspiria of 1977).
They were initially named Cherry Five and were influenced by Genesis and King Crimson. Their early work spawned one eponymous progressive rock record. The band were then called in as replacements for composer Giorgio Gaslini who had left the film Profondo Rosso after a conflict with director Dario Argento. They changed their name to Goblin and rewrote most of the score, including the famous main theme. The film, and the soundtrack album, were huge hits.
A reshuffle in their line-up followed, and they put out an instrumental album Roller, before they got the chance to work with Argento again for Suspiria. The score's nerve-jangling experimental sounds and bizarre vocals have since become legendary.
Goblin still continue, after A LOT of changes in their line up and they have wrote music for movies like George A. Romero's Dawn of the Dead (1978) and Argento's Tenebrae (1982) and Non ho sonno (Sleepless) (2000).
I'm not a big fan of progressive rock but this soundtrack is a fantastic work of art and a suitable sonic environment for this great film.