Guild Wars 2

My GW2 Audio Device setting is “Default Device”.

I have speakers plugged to the audio on my mobo, and a pair of USB headphones. I’m using the Win 7 “Set Default” option in the Playback sound devices panel to toggle between the two. However, whether or not GW2 honours the change is in the lap of the gods; sometimes it does, sometimes it doesn’t. If it doesn’t, it then gets out of synch (by which I mean that, e.g., it swaps to speakers when I set the default to headphones, and vice versa). Curiously I’ve never noticed it then miss a further change and correct itself.

If I do anything to force GW2 to go and discover the default (kill and reload the game, or change the in-game settings to something explicit and then back to default, say), it gets the correct output.

There’s clearly a problem of some sort in there in the interaction between WIn7 and GW2, but the real question is, is there anything I can do to influence and improve it? I would strongly prefer not to have to keep digging into the GW2 settings to make the game do what I expect it to.