I've been wondering about this for some time and can't seem to figure out what defines tunes as dubstep...

It can't be a snare on 3 as many artists don't follow that rule obviously (burial, joy orbison, ramadanman etc etc.)
It can't be a tempo at 140bpm as great dubstep artists such as martyn often ...

http://www.bbc.co.uk/programmes/b00tgxh0#-

always wonder what tunes name that comes in the intro of every show, starts about 51 seconds in, kind of a whiney synth that sounds like wee wee wee waw waw waw wow

thank you so much for the replies, but another question... I'm thinking of buying a midi keyboard but how many octaves do you think should be the minimum for writing your melodies?

Does it make it easier for you to write melodies or do you prefer using the mouse? Discuss.

How much money have you earned producing?

It seems that every 808 kick sample i ever find is too subby and doesn't have as much punch as i want them to have.
How do i give them more punch? Should i put a compressor on it?

I really like the snare in Skism - The Blank (16bit remix), anyone know how to make that kind of snare? Sounds really fat
http://www.youtube.com/watch?v=9bbH1vTTEUY

Is it possible to make a synth pad that glides all 3 notes to the other? Kind of hard to explain this question but the only way i've found to glide notes in massive is by turning on mono, but that obviously doesn't work with chords.

I'm a little confused about chord progressions. What do i use them for other than pads and such? if i choose, to say I IV V as my chord progression, should all the instruments of the song be based around that progression? Does that also apply to monotonic instruments such as the bassline?

Anyone know what he did to that vocal track?

I've searched everywhere around this forum for the answer of this question but...
why is it exactly that i need an audio interface for production?
Is it just for recording at a 24bit/96khz quality?
If so does it really matter what interface i get if i am not using it for sampling vinyl or recording ...