i kinda see wobble, being reliant on this LFO-modulated filtered bass sound, as being all about the overtones. it goes from just sub, so its almost like just being faded in and out and not really wobble (ealy dmz/coki stuff), to this serrated distorted mettallic sound, the current floor fillers, like this one
<object width="480" height="385"><param name="movie" value=""></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>
where its still relatively clean, albeit harsh and grating. then comes the stuff that empahsises the "disgusting" element of dubstep, which is really throaty, less metallic, and sound somewhere between a tuba and an actual pig. this is a good example
<object width="480" height="385"><param name="movie" value=""></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>
...where next for the sound?