search for cs2.exe, for me it was located at C:/Program Files (x86)/Steam/steamapps/common/Counter-Strike Global Offensive/game/bin/cs2/cs2.exe.

Once it's there, selected it and set it to emulate Windows 8 or Windows 8.1

And that's it, the sound should be smooth and crispy.

What does it change for CS2?
Source 2 games will auto-detect the current browser it runs on and based on that it'll change compatibility settings. For Windows 10 and onwards, Source 2 uses WASAPI for sound while in earlier versions of Windows it uses DirectSound, you can check this by running soundinfo in console while in game.
Apparently wasapi on macOS seems to not work properly or Source 2 uses it in a way is not expected. Tried for my mac, might fix your problems too.

♥♥♥♥ VALVE THESE ♥♥♥♥♥♥♥♥ INCOMPETENT PIECES OF CYBER TRASH CANT MAKE A SIMPLE MIC CHANNEL FUNCTION PROPERLY! I have spent months trying to get the game to function with my PC audio and nothing I do will help. It is not the system, it's the GAME ITSELF! Any little thing can set off the audio going to ABSOLUTE TOTAL ♥♥♥♥ and I WILL NOT lose any more sleep over it! ♥♥♥♥ VALVE and ♥♥♥♥ CS2!

Long live the best vibes

+rep good vibes

I can feel it cummin in the air tonight - DJ Deville circa 2024

+rep Best DJ