Music by Kevin MacLeod. Released into the public domain (CC Zero). Download link: http://freepd.com/Electronic/Phat%20Sketch

MacLeod's description:

Genre: Electronica
Length: 1:05
Instruments: Synths
Tempo: 120

Sizzling fat analog bass line with a little beat. 018
ISRC: US-UAN-11-00440
Aggressive, Grooving 2008