Sound in this game has always been *gestures vaguely*.

I thought things had gotten better, since my last sound issue before last night was in January, but last night in the middle of a trial my game sounds cut out entirely.

Something I discovered back in December/January, after EW launch but before I seemed to stop having issues, was that sometimes some sound categories were being routed to specific audio devices that I had not assigned them to. I have my game set to output through a virtual audio device designated for "Game Audio", and that audio device is then set to play on both speakers and headphones, but in 6.0/6.01 I would be playing and suddenly just one or two sound categories, say BGM and system sounds, would apparently cut out entirely but other categories would still work. It turned out the missing sound categories had actually been rerouted to Headphones while the sound effects and voice were still coming through Game Audio. In the middle of a play session, with no changes to any of my OS sound settings.

Maybe something like that is happening? Check your other audio devices to see if stray game sounds are coming out of them.