The April 11th Changelog introduced a new feature that enables players to modify sounds they hear on the server or configure “Global” sound settings that is unique to them.
Why is this useful?
If you don’t like the sound of a certain CC SWEP, or XXXGamer69 firing 18 rounds of his AWP Asimov in your ear is disturbing your comfort zone, you can now change the volume, pitch, range of the sound or remove it altogether. If you’re triggered by loud noises such as Thomas the Train being spawned on an innocent crowd of citizens at fountain then you can disable that sound completely.
How to locate sounds and modify them
Start by opening the F4 menu and clicking the “Sound” tab