From C-60 Low Noise (and isn’t that a great name?):

Prog Rock! Just the word makes some people nervous. Long haired nerds with lots of instruments and money, making music for themself down in some dark basement. But on the other hand, whats wrong with that picture! Prog Rock have always been the ugly stepbrother of Rock, but some of the biggest selling album in the world have been pure prog-rock. Dark Side of the Moon to just namedrop one.

They suggest six tracks, which in prog rock ought to run at least an hour total, and so they do. The closer is indeed from Pink Floyd, but not from DSOTM.