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Glad you solved the issue. Flightsim sometimes is a bitch :applause:

Sounds to me that the sim isn't the culprit. Did you try any other sound device?
The default sound device was mostly the reason for my issues. I usually use the speaker device. Would do some...

Sound setting maybe wrong adjusted? Environment lever too loud?
And:
Sound devices maybe in wrong usage after some windows update? Happens to me every now and again, most case by muted aircraft...