As of 8/13/2015, we're moving from Mumble to Discord for our "official" Nintendo voice chat. The original Mumble information is left here in the spoiler. The Mumble server will continue to be available until February 2016, when the 1 year contract runs out, just in case something goes horribly wrong with Discord. But it's been agreed that Discord is as good if not better, and the UI and setup are much easier.
I have made two PDFs with basic setup/usage info, although it seems clear from recent testing that most people can figure it out on their own. If you're new to the voice chat, grab the App and Mobile PDFs, because they have some intro info as well as the all-important invitation link to get you into the server. Both are encrypted again, and the password is still "chozo-chat".
9/2015 edit: An updated on 9/2/2015 made it so that you can make an account and all that from the mobile app. No longer is it necessary to use the desktop version to initially set things up. Please disregard anywhere it talks about this in the PDFs.
Let me know if anyone has questions or comments.
Edited by torgo, 19 September 2015 - 02:05 PM.