They recorded real coins and a cash register — then spliced it into a loop.

Yes, those are real coins and a real cash register, manually edited into a tape loop.

Pink Floyd’s engineer Alan Parsons recorded the band messing around with a cash register, coins, and even some paper tearing. Then he took a razor blade and physically cut and spliced the tape into a repeating loop. The loop runs in 7/4 time to match the song’s odd meter, and