"Money" is one of Pink Floyd's most famous songs ... the song stands out for its distinctive 7/4 time signature and iconic opening sound effects, which feature cash registers, coins, and paper ...

The British-born band Pink Floyd has a distinct sound. They’re classic rock, sure. But they also sound as if the genre’s signature sounds have been put through a filter of psychedelia.

This period was less cynical than the Roger Waters era of Pink Floyd, ingeniously incorporating elements of hope and wonder into the band’s signature innovation and experimentation.