The basses in this were patches made in Massive, Sytrus, and Harmor which were then re-sampled through Harmor as analyzed audio. The bass mixer insert employed a limit with the soft saturation turned on. It added that extra bite on top.
This is quite a big step for me :] Despite the totally amateurish drum programming, getting this kind of bass sound even a little has been my goal for years and years. I am pumped.