On April 10, 1975, when Pink Floyd performed live at Seattle Center Coliseum, they were experiencing significant commercial success following the release of their seminal album "The Dark Side of the Moon" in March 1973. This album solidified their status in rock music history, featuring hits like "Money" and "Time," and becoming one of the best-selling albums of all time. By 1975, they were in the midst of touring in support of their follow-up album, "Wish You Were Here," which they released later that year. The Seattle concert is notable not only for showcasing the band's evolving sound but also for the remarkable live experience they delivered, characterized by elaborate light shows and thematic elements that complemented their music. This period marked a pivotal point in Pink Floyd's career, as they transitioned from their earlier psychedelic roots to more concept-driven, progressive rock, setting the stage for their future masterpieces.