if youre talking about the bassline, that sounds like just a few detuned saw waves played at a low octave, maybe some distortion added, and then a lowpass. keep the attack short, decay long, release non-existant, maybe add some slide. the more ethereal/ high-end part of it sounds like its a chord being held throughout with lots of stereo width (use chorus and reverb, also the Fruity Stereo Shaper is nice), and its sidechained to the kick. does that help at all?