Mumble

Need a copy of mumble ?

Grab it from http://mumble.sourceforge.net/

Works with Windows, Mac, and even Linux.

Mumble connection info

Servername: Something that you'll remember is us! MCPublic or RedditMC are good ones.

Address: mumble.nerd.nu

Port: 6162

Username: Your Minecraft name

TURN ON PUSH TO TALK

When you first get mumble it will talk whenever your mic has activity. This is extremely annoying and you will be kicked if you keep it up.

To change it, go into Configure -> Settings -> Audio Input -> Change Voice activity to Push to talk

Next, you have to set a shortcut for your push to talk key, to do so, Configure -> Settings -> Shortcuts -> Add -> Function: Push to talk -> Shortcut: Key of your choosing.