The sound decreases by half during the game

Hello.
There was a problem with the sound during the game.
In general, when I enter the game, the sound is muted everywhere by about half. But, this is not indicated anywhere. Sound mixer - all bands at full. In the sound settings - also without changes.

When I minimize the game - the sound is normalized, when I expand it back - it becomes quieter again. And everywhere. In the game, on YouTube, in OBS.
I did not notice such a problem with other games, I checked everything.

What did I do?
I updated the drivers, tried through headphones and through speakers, changed different inputs and outputs, disabled all visual effects from the sound card, changed the frequency of sound playback - all without result.
And the problem appeared relatively recently, before certain updates in the game. This did not happen before. During this period, I did not change or reinstall anything!

It seems like a small thing, but in fact it really bothers me, how come I have to turn the sound up 2 times more when I play and watch YouTube and when I minimize it, it just starts a disco.

Windows 11
Sound card: Realtek 7.1 Surround Sound

I use speakers directly through the motherboard
Headphones are connected to the monitor, the sound comes from the video card
THERE IS NO DIFFERENCE, in any situation the sound dies down

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