How to for Mumble"
Download page: Link
Select Windows (stable) as the version:
Upon installation, use all default options. You will then be directed to the Audio Tuning Wizarad
Here, you will select your input. Manually select your output (soundcard) and input (mic)
The next screen, leave at default
Next, manually change the sensitifity IF NEEDED. Normally this is already set properly
Select your push to talk button. I normally use LEFT ALT.
Leave this at default
Check use headphones if you are. Otherwise leave it unchecked
Next screen, click finish.
Now that mumble is setup, you will want to disable the overlay. This can be done by going to configure, then settings.
Now that mumble is setup, all you need to do is select a server. I will post the server information at a later date. Good Luck!