Procol Harum

Band Overview

Procol Harum emerged from the British psychedelic and Progressive Rock scene in 1967, fronted by Gary Brooker on vocals and keyboards, with guitarist Robin Trower as the band's instrumental anchor. While often remembered as a one-hit wonder for 'A Whiter Shade of Pale', the band's catalog reveals a sophisticated approach to composition and arrangement that blends classical influences, soul grooves, and experimental rock textures. Robin Trower's guitar work is the backbone of Procol Harum's sound, marked by fluid legato playing, subtle vibrato control, and a warm, singing tone that defined a generation of blues-influenced rock guitarists. What makes Procol Harum essential for guitarists is their restraint and taste; Trower rarely plays fast for its own sake, instead prioritizing melodic phrasing, tone control, and the spaces between notes. His approach contrasts sharply with the flash-heavy rock of the era, making Procol Harum an invaluable case study for players learning that less can be more. Robin Trower is the primary guitar voice you'll study when learning Procol Harum, though his departure from the band after their 1971 peak left subsequent lineups with less memorable guitar work. Trower's technique relies heavily on single-note melodic lines, often played with a subtle tremolo or vibrato that gives his leads an almost vocal quality. He favors the Fender Stratocaster, which paired with a warm tube amp setup, produces that signature creamy, sustaining tone heard throughout 'A Whiter Shade of Pale' and deeper album tracks. The difficulty level for most Procol Harum songs sits in the intermediate range; the riffs aren't particularly complex, but nailing Trower's tone and phrasing requires patience, proper vibrato technique, and a good understanding of how to extract singing sustain from your amp and guitar without heavy distortion. Procol Harum's influence on rock guitar is understated but profound. Trower's approach prefigures the blues-rock fusion that would dominate the 1970s through artists like Gary Moore and B.B. King-inspired rock players. What separates Procol Harum from heavier contemporaries is their orchestral arrangement sensibility; many tracks feature strings, organ arrangements, and complex song structures that demand taste and restraint from the guitarist. For players tired of learning power chords and pentatonic scales, Procol Harum offers a masterclass in serving the song first, playing fewer notes with greater intention, and building a recognizable tone that doesn't rely on heavy effects or extreme technique.