Money

Money is harmonically a minor blues, but it is made distinctive by its unconventional 7/4 time signature and the sudden shift to 4/4 for the guitar solo. The use of minor 7th chords (Bm7, F#m7, Em7) on the Wurlitzer electric piano provides a jazz-inflected texture. Unlike standard pop songs that rely on a major V chord for a strong resolution, Pink Floyd uses a natural minor v (F#m7), which contributes to the song's cool, detached, and somewhat cynical atmosphere.

Roger Waters composed 'Money' as a demo in his home studio. He created the iconic rhythmic loop of coins and cash registers by hand, measuring out tape with a ruler to ensure the sounds hit on the beat. The song is famous for its unusual 7/4 time signature, though it shifts to 4/4 for the guitar solo section to make it easier for David Gilmour to improvise.

Serving as the commercial peak of 'The Dark Side of the Moon,' this track blended experimental tape loops with hard-hitting blues-rock. It is legendary for its satirical lyrics and its rare success as a mainstream hit featuring a complex 7/4 time signature.