This article explores the profound and lasting influence of Syd Barrett on Pink Floyd’s music. Using the innovative “Candy and a Currant Bun” test, we analyze every track in the band’s catalogue, revealing that most of their greatest songs, whether created by, about, or in reaction to Barrett, stem from his unique genius. With data-backed insights, vivid imagery, and a fresh perspective on Barrett’s foundational role, this piece redefines how we view Pink Floyd’s legacy, proving that Barrett was not just a fleeting presence but the creative epicentre of their evolution.