The album starts with "Atom Heart Mother Suite", a 23-minute long piece that is divided into six parts. It begins with a gentle, pastoral introduction that slowly builds up to a bombastic orchestral climax. The middle section is dominated by a jazzy trumpet solo and a dissonant, experimental section featuring distorted vocals and electronic effects. The suite ends with a reprise of the opening theme, bringing the piece full circle.

"Atom Heart Mother" is a highly ambitious and eclectic album that showcases Pink Floyd's wide-ranging musical abilities. The album incorporates elements of classical music, jazz, folk, and experimental rock, and features some of the band's most memorable melodies and intricate instrumental work. While some may find the album's experimental tendencies challenging, it remains a benchmark to progressive rock, and the nucleus to Pink Floyd's future albums.