The notes and chords are based on the regular twelve-bar blues in the musical key of B minor, with the sung melody and nearly all of Gilmour's solo based on the pentatonic and blues scales. Two twelve-bar verses are followed by a twenty-bar instrumental section that features a blues-style tenor saxophone solo (played by Dick Parry) along with keyboard, bass and drums and a further two-bar intro in 4/4 leading to the guitar solo, which is structured like a twelve-bar blues, but doubled to a twenty-four-bar length.