You dont just make dubstep. Obviously if you think there is a specific program for dubstep or dont know anything about the most popular audio editing software then youre just a noob. It takes a long time to make music in general and dubstep is more editing intensive than any other kind of music. My ten bucks says you downlad some free program or a cracked version of fl studio or what not, spend a week learning tutorials, get maybe 30 seconds done and then give up. Theres a reason so few people do it, you cant just sit down and do it as with most things in life. Its a noob mistake you are like "ooh i want to make dubstep and having "the best" program is going to make me super good." I see it all the time with vfx. Kids are like "I just downladed after effects. So how do I do starwars/tron etc effect" the answer is, you dont. In sixth months or a year you might turn out something decent but only if you spend tons of time doing the basics.