" BadSyntax, goddammit, I'm not reading your shit. Get a microphone." -- shypixel
MinecraftOnline features a TeamSpeak server for easy realtime voice communication in-game, as well as socialising out of game.
TeamSpeak was chosen as it's free, easy to install and use, has efficient voice detection and hotkey use, and is cross-platform. TeamSpeak 3 runs on Windows, Linux, Mac OS X and FreeBSD. You can occasionally be serenaded by a terrible musician, if you're lucky enough to be on at that time.
You can see who's online on the TeamSpeak server at any time in one of four ways:
- At a glance at the side box on the main website,
- By typing the /tswho command in-game,
- By typing !tslist in IRC,
- By clicking the Server status tab on the Facebook page. 
MinecraftOnline uses TeamSpeak 3. A client is available to download at teamspeak.com.
To connect, simply instruct a TeamSpeak 3 client to connect to minecraftonline.com on the default port (9987).
No password is necessary.
The server will refuse connections from Teamspeak 2 clients - please make sure you're using Teamspeak 3 when you try to connect.
- You can see who's talking by the blue light next to their name.
- A text chat channel also exists in TeamSpeak, which allows you to share links or communicate even without a microphone.
- Echoing may occur if using voice detection mode with speakers. It is recommended to switch to push-to-talk mode for use with speakers, or in a noisy environment.
- In-Game - The channel for all those who wish to talk in-game.
- General chat - The channel for those not in-game, but wishing to chat on teamspeak.
- Low Bandwidth - Ultra-low-bandwidth alternative channel for those with poor internet connections
Additionally, players are able to create their own private or public channels for their own use.
"XANFERT CONE TEAMPEK" - Liastrae
"no teampek" - xanderstrike
"Yeah Xanfert, cone teakpek" - Palindrome7
Same rules apply as in IRC - that is, there are no rules. While you have free speech in-game, you may be kicked for excess offensiveness or spamming from TeamSpeak at a moderator's discretion. However, this very rarely happens.