What makes In Hearing of Atomic Rooster by Atomic Rooster notable?

This album is significant for its role in the development of progressive rock, showcasing complex song structures and lyrical themes. It gained attention for its unique sound, which contributed to the evolution of hard rock and influenced later genres, despite not achieving major commercial success. In Hearing of Atomic Rooster is the band's second album, released in August 1971, following their self-titled debut. At this point, Atomic Rooster was solidifying their identity in the British rock scene, transitioning from their early lineup to a more stable version featuring prominent members like Vincent Crane and Carl Palmer.