SYNTH: MED, Blu, Madlib (featuring MF Doom), 'Knock Knock'

Each week, staff from CBC Music, Radio 2, 3 and CBC regions across the country collect songs they just can't get out of their heads [Songs You Need to Hear—SYNTH], and make a case for why you should listen, too. Press play below and discover new songs for your listening list.
Here's mine (via CBCmusic.ca):

Who’s there? Rappcats. Rappcats who? MF Doom, Madlib, MED and Blu — and they’re busting out some funky fresh tunes while drinking your beers and diggin’ through your DVDs. Labelmates — and LA indie hip-hop icons — Madlib, MED and Blu are collaborating on a new album, Bad Neighbor, which comes out on October 30th. If the rest of it is half as good as "Knock Knock," I’m gonna have to let them in.