Guild Wars 2

UPDATE * found the issue – it is NOT a problem originating from the game, but from a Windows 10 update which increases the bitrate of sound devices up to studio quality – something that a lower end sound device cannot do, and would freak out after some usage. (typical Microsoft hehe)

Solution: http://microsoft-news.com/heres-how-to-fix-sound-drivers-issues-on-windows-10-build-10130/

Me too… noticed it 4 days ago, after a few minutes ingame all sound stops (alt tabbing to other applications, sound is still not working). Closing GW2 makes sound come back. Also, inserting a USB headphones (a new sound device) resumes sound ingame, but then stops randomly, and reinserting everytime does the trick.