Lindsay Cooper (1951–2013) was a British composer, musician, and pivotal figure in the avant-garde and progressive rock scenes. She is best known for her work as a multi-instrumentalist, playing bassoon, clarinet, and various keyboards. Cooper was a founding member of the influential bands Henry Cow and The Art Bears, both of which were instrumental in the development of the RIO (Rock In Opposition) movement, emphasizing experimental and politically charged music. Notable works include Henry Cow's albums "In Praise of Learning" and "Western Culture," as well as The Art Bears' "Hopes and Fears." Cooper also composed music for theater and film, showcasing her versatility and commitment to challenging artistic expression. Her impact on music is significant, as she helped bridge the gap between rock and contemporary classical music, inspiring countless musicians and composers in the avant-garde genre. Cooper's distinctive sound and innovative approach to composition and performance have left a lasting legacy, solidifying her status as a key figure in the evolution of progressive and experimental music.