Patch 6.08 is what started the audio issues for me. At first, I had some crackling and popping sounds with just wind while mounted. When I logged off and the game was shutting down, I would hear a second or less of the "crowd" noises. Then one day, I started having both these issues along with crackling and popping sounds going the whole time I play except when in a duty, unless I'm just not noticing it since I turned my ambient sound way down and there's as lot of sound effects and BGM drowning out everything else during combat. I'll have to double check this.