I’m having issues with not getting any NPC dialogue since the latest patch. I started noticing in dungeons and raids that when bosses start yelling the red chat would appear but I couldn’t hear their actual voices. I checked the towns (Stormwind) and same thing, no guard, npc etc. “talks”. There is no npc sound coming up. I would restart the game and hear it for a short time but within a matter of minutes all NPC dialogue is gone again.
There is a quite recent post on the US forums as well:
No npc dialogue
And yes, I did check all the sound options, disabled, enabled dialogue etc… No success. All other sound in the game is working, spell effects etc. Even my own characters emote sounds work but none of the NPC ones do.
/edit: sorry, just realized there is a 3d old topic here as well (searched for ‘sound’ and nothing recent came up).