Jason Hayes, the lead composer for original 2004 world of warcraft again joins Blizzard audio team in late 2012. He has composed most of the original wow's music. Really hope he would do some new tracks for 5.4! Some of you might be familiar with his older tracks:
Legends of Azeroth: http://www.youtube.com/watch?v=eE5oaOOwInE
A Call to Arms: http://www.youtube.com/watch?v=35aGD24aB00
Stormwind: http://www.youtube.com/watch?v=_rXIyz8HSJQ
Orgrimmar: http://www.youtube.com/watch?v=iiEFzJwQLBQ
Ashenvale: http://www.youtube.com/watch?v=b4U4vr_Ra3o
Elwynn forest: http://www.youtube.com/watch?v=uvW-QTiZLQ0
Searing Gorge: http://www.youtube.com/watch?v=9l5DkBMQ4to
New tracks:
Patch 5.1
Alliance Battle March: http://www.youtube.com/watch?v=fwTbnNOPFzU
Jaina's Theme: http://www.youtube.com/watch?v=n-vNMKBoiCM
Garrosh's Theme: http://www.youtube.com/watch?v=HX1AnCklYZ8
Darkmoon Faire carousel theme: http://www.youtube.com/watch?v=cF7CpyIwJiY
Some other projects:
Heartstone trailer theme: http://www.youtube.com/watch?v=QdXl3QtutQI
Dota 2 Main theme: http://www.youtube.com/watch?v=FUSTuiSEKQk
Dota 2 Explore theme: http://www.youtube.com/watch?v=U-_jzzHE2GI