Wikipedia:Mumble

Screenshot of Wikipedia Mumble in use.

Mumble is an open-source group voice chat software, originally designed for gaming. We're currently experimenting with an unofficial Mumble server set up specifically for Wikipedia editors (and editors of other Wikimedia Foundation projects) to interact and discuss the project while editing.

Like Wikipedia IRC, the Mumble server is intended to be informal and promote community interaction, but provides a hands-free, voice-based operation that's ideal for real-time collaboration in small groups. Mumble also includes text-based chat for users who may want to listen to other users but prefer to type themselves. Unlike a multiparty Skype call, it is open to the public, supports multiple separate channels, and transmits only when a person speaks, using less bandwidth and scaling to larger numbers of people.

All Mumble communication is encrypted for the privacy of participants. However, unless you are in a private room, be aware that other users in the room may be recording you. Recordings should not be redistributed without permission of the recorded parties, and violators are subject to bans.