Which Pink Floyd song is the longest studio recording, and what are its distinct sections?

The longest single-studio track Pink Floyd ever released is “Atom Heart Mother” at 23 minutes and 44 seconds, beating “Echoes” by about 13 seconds. (If you count “Shine On You Crazy Diamond” as one piece across two sides, it’s longer at 26:01, but it’s split into two tracks on the album.)

The suite was originally scored with six named sections: “Father’s Shout,” “Breast Milky,” “Mother Fore,” “Funky Dung,” “Mind Your Throats Please,” and “Remergence.” The band worked with composer Ron Geesin to orchestrate the piece, and the sections flow from a choral fanfare into a bluesy slide-guitar passage, then a funky organ-driven groove, and eventually dissolve into abstract tape loops and a dramatic finale. The names were Geesin’s cheeky references to the album