Roger Keith "Syd" Barrett (6 January 1946 – 7 July 2006) was an English singer, guitarist and songwriter who co-founded the rock band Pink Floyd in 1965. Until his departure in 1968, he was Pink Floyd's frontman and primary songwriter, known for his whimsical style of psychedelia and stream-of-consciousness writing. As a guitarist, he was influential for his free-form playing and for employing effects such as dissonance, distortion, echo and feedback.
Trained as a painter, Barrett was musically active for just over ten years. With Pink Floyd, he recorded the first three singles, their debut album The Piper at the Gates of Dawn (1967), part of their second album A Saucerful of Secrets (1968), and several songs that were not released until later. He left the band in April 1968 amid speculation of mental illness and his use of psychedelic drugs, beginning a brief solo career the following year with the single "Octopus", followed by albums The Madcap Laughs (1970) and Barrett (1970), recorded with the help of Pink Floyd and the Soft Machine.
In 1974, Barrett left the music industry, retired from public life and guarded his privacy until his death.