Solve : Sounds goes weird??

1.	Solve : Sounds goes weird??
Answer» For some reason, when I play games (other than VALVE's) the game volume keeps same level, but skype's and foobar's sounds lowers. Why does this happens for everything than valve's games? DEMONSTRATION: Playing Valve game: NOTHING happens Playing not-Valve game: Cant hear skype or foobar CLEARLY, have to raise volume for them a.k.a annoying! (SORRY if my ENGLISH is bad)

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