Rick Wright’s Keyboard Evolution: How a Farfisa, Hammond, Mellotron, and Prophet-5 Redrew Pink Floyd’s Harmonic Map

On The Piper at the Gates of Dawn, Rick Wright’s go-to keys were a Farfisa Compact Duo organ and a low-rent piano. The Farfisa’s reedy, nasal tone gave those early psych tracks a jittery, cartoonish brightness—think “Astronomy Domine” or “Interstellar Overdrive.” Harmonies stayed close to the blues scale or simple major/minor triads, and the band’s genre was still garage-psych with Syd’s whimsical chaos.

When David Gilmour joined and the band drifted toward longer, moodier pieces, Wright swapped the Farfisa for a Hammond M-102 and a Mellotron M400. The Hammond’s swelling drawbars and Leslie speaker added a gospel-like warmth and sustain—hear that on “Echoes” or “Us and Them.” The Mellotron brought string and choir samples that let Wright fake an orchestra without hiring one. These two instruments let him hang chords for minutes, stretching the band’s harmonic language into suspended fourths, minor sevenths, and modal vamping. This was the shift from psychedelic pop to progressive space-rock.

Later, for The Wall and The Final Cut, Wright picked up a Prophet-5 synthesizer. Its polyphonic, patchable analog sound gave him precise control over texture—those cold, sweeping pads on “Comfortably Numb” or the eerie brass-like stabs in “Hey You.” The Prophet-5 allowed chordal moves that were more cinematic than bluesy: abrupt key changes, cluster voicings, and sustained dissonance. That instrument, combined with his earlier Hammond and Mellotron, was Wright’s final step from progressive rock into the lush, ambient expanse that defined the band’s Animals and Dark Side era—even though his legal troubles almost kept him off The Wall. Every keyboard choice he made wrote a new sentence in the band’s tonal grammar.