There is more than one artist with this name: 1) The Deep was a short-lived American rock and roll band formed in Philadelphia, Pennsylvania, during the mid-1960s. Their style of rock and roll can be characterized as protopunk at times, while at others, their music delves into more psychedelic sounds. Their biggest claim to fame is probably that the title of their sole album, "The Psychedelic Moods of The Deep", is most likely the first time the word "psychedelic" was used in an album title.