All custom items such as battle calls, medic cries, emotes and trails are part of the "optional content pack" or "DLC". It is a completely optional bundle of content that does not automatically download when a player connects to our community game servers.
This measure was done to cut all unnecessary download times for players who only want to play on the servers without ever interacting outside the base features.
The content pack can be obtained by connecting to the content distributor at the IP address: download.titan.tf:11111
Don't worry, the installation process is automatic and the game will notify you as soon as it finishes installing. The simplest way to connect to it via the IP address is to enter the following line into the address bar of your browser.
Alternatively, you can enable your Team Fortress 2 developer console and connect through it by following the screenshots below.
Updating is the same as the installation process. You can update your content pack by connecting to the content distributor at the IP address: download.titan.tf:11111
Similarly, you can follow the connection guide in the installation section above if you do not know how to connect to a server using the server's IP address.
You can adjust the volume of sounds played to you after you have the optional content pack installed. Head over to settings, and follow the screenshot below.