Transitional basslines/pitching help

[Gheotor65]

Hello, not really sure how to describe what I'm looking for here, so I'll show you some examples:

http://soundcloud.com/excision/excision-datsik-calypso
At the drop at about :27, and again at :35ish.

I can't seem to mimic this kind of sound at all, any tips? I usually use massive, but I have a few other synths I can use too.

Also, I've always been curious to try to give a sort of hardcore/hardstyle slant to a dubstep song, and I found a song that sort of hints at that here: http://soundcloud.com/excision/excision-downlink-crowd
Does more of this exist?

[outdropt]

http://www.dubstepforum.com/viewtopic.php?f=8&t=199401

http://dubstepforum.com/viewtopic.php?f=8&t=130965

http://www.dubstepforum.com/viewtopic.php?f=8&t=176826

Please use all resources before asking. This has come up a million and one times. Read as much as you can of the Synthesis sticky at the top of DSF

[outdropt]