Mumble is a free, open-source, cross-platform voice over IP application. Its primary users are gamers, and it is similar to programs such as TeamSpeak and Ventrilo. It uses a client–server architecture where users who want to talk connect to the same server.
Mumble has a very simple administrative interface and most of the engineering effort is put into sound quality and low latency. Mumble uses Speex not only as a voice codec, but also for noise reduction and automatic gain control. Mumble is optimized for low latency, resulting in faster communication.
Mumble incorporates echo cancellation, which permits the use of speakers as well as headphones. With some games, like Call of Duty on Windows, a plugin lets you hear the positional audio of other players.
A Mumble server has a Root channel and a hierarchical tree of channels beneath it. Users can link channels together to temporarily create large virtual channels. This is useful during larger events where a small group of users may be chatting in a channel, but they will be linked to a common channel with other users to hear announcements.
It also matches well with team-based FPS games. Each channel has an associated set of groups and access control lists which control user permissions. The system is fairly complex allowing many different usage scenarios, but this complexity also makes it hard to configure [advt]
The overlay is now highly customizable. Instead of only being able to control position and size as in previous released you can now freely reorder, scale, show/hide its components giving you the freedom to make it look just the way you want it. It can also display additional useful information like your Framerate (FPS).
Amplitude based voice activity detection has been greatly improved. The biggest benefits are expected for people using it in a noisy environment as the detection now operates on noise filtered instead of raw audio data.
Another long awaited feature finally arrived in Mumble: Recording. Our recorder can store in several widespread formats and supports Mixdown as well as Multichannel recording