A unique 7.1 interactive sound system
Gamecloud , 19th May 2005 (Jørgen Tharaldsen)
(Check out this IGN Article about Music in AoC where you find a lot of info about the sound and music.)
IGN, 22nd November 2005
There will most likely be voice acting for NPCs in Age of Conan. To what extent it is used we can't say just yet, but the plan is to use it.
Forums, 10th December 2005 (Silirrion)