Yup, the Eventide Modfactor can do a very convincing dubstep wobble in a variety of flavors. I'm pretty happy with it, though there are some limitations to what it can do and some program flaws (more on that stuff below).
This clip is from when I first got a Modfactor in April; signal chain is bass >> Pigtronix Mothership >> Eventide Pitchfactor >> Eventide Modfactor >> Boss DD-6 >> mixer >> Audacity.
The good: main LPF in modfilter sounds great as do the bass wah and bass vowel wah under Q-wah. You can get a really wide range of sounds including some pretty sweet vowel wobbles. If you're running this after an octaver (as you should be), the subs can be earth shaking. In tempo mode, the speed knob switches over to a beat division control, a necessity for getting a tempo-locked wobble. And it's easy as pie to attach an expression pedal for live control over said divisions. Using it in conjunction with a pitchfactor and a midi floor board is a slice of heaven. Also, I certainly haven't tapped into everything that's possible using the secondary control types.
The bad: Q maxes out at 3 on the modfilter settings, and the peak sounds pretty wide to me. The Q hits 10 on the Q-wah settings BUT there's a bug where the expression pedal position determines volume (flat to several db boost) no matter what. This makes controlling only the wobble beat division impossible in these settings, which IMO takes away 2/3s of the wobble options. There are other ways to do this -- midi exp controlling the knob and not exp, using the break function -- but these don't offer the flexibility of the expression pedal. I talked with Eventide support, who have been very good, and the engineers have a fix together that should go out with the next firmware update.
Verdict: awesome authentic wobbles and loads of other modulation possibilities, but not without problems. Midi connectivity and expression pedal options are best in the industry (
AFAIK), tech support is good, etc. Hopefully the fix comes out soon.
There are some things that a dedicated filter should do better, so if the fix doesn't come out by the next time I've got a spare $200, I'll probably give the Source Audio BEF Pro a shot.