Revolution 9 by The Beatles is an avant-garde sound collage created primarily by John Lennon and Yoko Ono. It stands out due to its experimental nature, diverging from traditional song structures. The track features a variety of looped sound effects, spoken word fragments, orchestral segments, and abstract acoustic elements, reflecting the tumultuous social and political climate of the late 1960s. The key themes include the chaos and unpredictability of society, revolution, and the unsettling nature of change. One particularly poignant aspect is the recurring phrase 'Number nine,' which adds an eerie rhythm and sense of foreboding throughout the track.