Daft Punk creates their songs by extensively sampling records, mostly from the 70s and 80s. In some cases, bits of song are used relatively unchanged while others are chopped up and repeated to the point of being unrecognizable. Here are a few of the group’s samples compared with their original sources.
See also the duo’s Alive 2007 live album, which I have been listening to extensively lately.
Update: The video I’d originally linked to got taken down but I replaced it with another one. Here’s another one as well.