Dub:
Is a genre of music which grew out of reggae music in the 1960s, and is commonly considered a subgenre, though it has developed to extend beyond the scope of reggae. Dub is characterized as a “version” of an existing song, typically emphasizing the drums and bass for a sound popular in local Sound Systems. The instrumental tracks are typically drenched in sound processing effects, with most of the lead instruments and vocals dropping in and out of the mix. The music sometimes features processed sound effects and other noises, such as animal sounds, babies crying, and producers shouting instructions at the musicians.

Example of some dub:

The verb dub is defined as making a copy of one recording to another. The process used by Jamaican producers when making dubs was to use previously recorded material, modify the material, and subsequently record it to a new master mix, in effect transferring or “dubbing” the material.

Dubstep is a genre of electronic dance music that originated in South East London. Its overall sound has been described as “tightly coiled productions with overwhelming bass lines and reverberant drum patterns, clipped samples, and occasional vocals”. One characteristic of dubstep is the wobble bass, where an extended bass note is manipulated musically. This contrasts with other styles of electronic music where the same, unmanipulated sample is played at different pitches to make a bassline, as on a musical score. Wobble bass is produced by using a very low frequency oscillator to manipulate a bass parameter, such as volume, distortion or filter cutoff. The resulting sound is a bassline dominated by single, extended bass note which has a distinctive wobble sound.

Ill give you an example even though i’m sure you don’t actually need one :P

sources:
http://www.jahsonic.com/Dub.html
www.wikipedia.com

Ascending Change by The Beekeepers

About:

“The Beekeepers are two Bristol producers working with a collective of singers and musicians to deliver an album of lush orchestration, dark dub, tight beats and killer songs. It is true to the tradition of music from their hometown and occasionally referencing those influences but always looking to move the game forward and never succumbing to the need to be po-faced or deathly serious. Yes there are heavy tracks on the album but there are also tunes that you can drop at a club or a house party because after all that’s where both of the Beekeepers are coming from.

Scott “Boca 45” Hendy is a man with his finger in several musical pies. As well as his DJ production work as Boca 45, he is the writer producer behind indie band Diego The Dissidents (recently featured in the Banksy Film “Exit Through the Gift Shop”) as well as being the man behind the mixing desk for Malachai (signed to Domino Records and feted by Zane Lowe as his “hottest record in the world” on his radio show)

Parker completes the core of The Beekeepers. An extremely talented and always in demand DJ who learnt his trade via the battle route – he has been steadily picking up fans since the release of his debut Parker album “To Eternity”. He has since had a series of block rocking releases on labels like Jalapeno, GoodGroove and Bombstrikes and his dubstep re-fix of James Brown hit the # 1 spot on Hype Machine. His biggest smash though has been the infinitely popular ‘Where’s My Monkey?’ track which made him a YouTube hit.

Often booked on the same bills the two were firm fans of each other’s DJ styles and skills and over a few pints of cider (the west country way) decided that perhaps the time was right to work together.”