Sound problem, help!

Recently (I can’t say exactly when, and I also don’t know what I could do during this period), a problem has appeared. When you turn on the music, the video does not matter, in any browser (I did not check other sound sources) and start the game (Dota), the sound becomes 2 times louder and as if with a raised frequency. I looked all over and did not find how to fix it, help me solve the problem, it's very annoying.