1. Visit this link (http://www.mumble.com/mumble-download.php) and click the green button to begin installing mumble
2. Once installed follow the steps to certify your mumble account
3. Click the Connect button if the server window is not already open
4. Click the Add new button
5. Insert the following information into the field that appears:
Label: +1
Address: 27.50.70.3
Port: 2687
Username: [your Steam username]
6. Connect to our channel, CBS

Its up to you, but i reccomend setting your mumble to either continuous or push to talk. You can do this in the shortcuts tab of the settings.