It is electronic dance music, of the Trance variety. They often have vocals in their music, so it is not ALL synthesized. They are one of the top three DJ’s in the world. And more than that, they are producers. They dont just mix and spin, they actually produce everything they spin. A&B also went by the name Oceanlab.
As far as “similar” artists, it is difficult to nail down, mainly because other DJ’s spin such a wide variety of stuff (as they dont write their own), where A&B is narrower in their tastes. Most of the other top DJ’s spin A&B’s stuff. You will frequently hear A&B tunes from Tiesto, Armin Van Buuren, Infected Mushroom, & Marcus Schulz to name a few. (they also work with them occasionally to put together some of the sickest tracks to see the light of day…or night for that matter. heh)
First three songs are Air For Life, one of the sickest trance tracks ever produced. You cannot grasp this song until you hear it in a club scene. The third one is much better quality, but just music.
Here is Tiesto spinning Air For Life by A&B:
http://youtube.com/watch?v=2toPWRMl-8M
Air For Life being spun by Markus Schulz @ Guv, guy filming is my friend, was standing next to him the whole time:
http://youtube.com/watch?v=MbaPGl4Btcg
Just the song: (Airwave Remix)
http://youtube.com/watch?v=aAIw_d_Vt8I
Next two songs are Cant Sleep, First is actually A&B spinning;
A&B Spinning:
http://youtube.com/watch?v=ucNIeGSJx9Q
Much Better Quality, not much video:
http://youtube.com/watch?v=H93BTteva-U
And last but not least, AT GUV LAST YEAR! WOOOT!!! I remember like it was yesterday! AWESOME! The first vid is their opening, it honestly brought tears to my eyes remembering that night. Fucking perfection.
http://youtube.com/watch?v=2cLZr26bCCc
http://youtube.com/watch?v=K9ANj4quDK8
http://youtube.com/watch?v=EdxIXMha2_Y
http://youtube.com/watch?v=HWrCLWsr31w
http://youtube.com/watch?v=kHjae00xwBk