As pointed out by YouTube user Gladvillainy, the music that plays under the “Previously on Mad Men” episode summaries at the top of the show use a sample from Liquefaction by Four Tet.

Unable to find what this music was, or any kind of clean recording, my obsessive side took over, and I decided to recreate it from scratch, just using that little sample from Liquefaction as a starting point.

UPDATED 2/5/2015: So after getting many messages from people asking me to create an extended version, I decided to commemorate the ending of Mad Men by doing exactly that.