I tried with with 32bit and 64 bit client too, but no audio. The game is soo silent it is very different and speaking with npc there is no talk animation.
Everything is ok. After a fresh install, awesome sound everywhere.
Ps.: Something was strange with my client, every patch occurs to me patch manifest error, repair -> 0% download whole game again, close launcher, start launcher again and can play. And after uninstall ESO, the install dir was 60Gb+, manual delte and documents\ESO folders too and after it started the new install. It was the time to reinstall the game