The four-note opening motif of Shine On You Crazy Diamond is one of the most recognizable guitar phrases ever played. Gilmour's Stratocaster through a Hiwatt with a compressor and delay produces a tone of infinite sustain and crystalline clarity. The notes ring out with an almost vocal quality, each one sustaining until the next is played. The tone relies on precise gain staging: enough sustain to carry each note but not so much distortion that clarity is lost.
David Gilmour's Pink Floyd tone decoded: amp settings, Big Muff dials, delay chains, and song settings for Comfortably Numb, Time, and Shine On.
The Animals album tone is darker, more aggressive, and less studied than Comfortably Numb, and it's a different rig. Here's what Gilmour was running in 1977 and how to get there.
A complete BPM-to-milliseconds reference table for dotted eighth delay, plus three methods for setting the time by ear when you don't have a tap tempo pedal.