Sound problems after opening DVD player

When I open DVD player I no longer get sound output on webpages unless I restart safari or firefox
I've got sound outputted through digital output
Everything is fine before but the second that DVD player opens and even after it's closed down I still don't get sound output on webpages until I restart the browser
Anyone got any ideas ???
Cheers

Since it's so new, I would call AppleCare Support or bring it into an Apple store. That shouldn't be happening with a brand-new Mac.
-Doug

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