What makes Echo by Dave Burrell notable?

'Echo' is significant for its ambitious length and structure, particularly the title track which runs over 20 minutes. It stands out in the late 1960s jazz landscape for its experimental nature, contributing to the broader avant-garde movement that influenced numerous musicians and styles in subsequent years. Released in 1969, 'Echo' was Dave Burrell's third album, following his 1968 work 'The Case of the Third Army'. By this point, Burrell was establishing himself within the post-bop jazz scene, showcasing his innovative approach to composition and improvisation. This album reflects his growth as an artist during a transformative period for jazz.