An implementation of the mumble voice chat protocol in C#
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MumbleSharp is an implementation of a mumble client in C#.

The solution comes in two parts:

  • MumbleSharp is the actual MumbleSharp library which is a class library for building mumble clients.
  • MumbleClient is a console mumble client, a console application to use for testing and learning.
  • MumbleGuiClient is a winform mumble client, a minimalistic client but fully functional: channels display and switching, message chat, voice support, playback/recording device selection and a very basic voice detection.

As you can see from the MumbleClient Program.cs creating a new client is very simple:

  1. Implement IMumbleProtocol and implement methods to respond to messages of different types however you wish.
  2. Use a MumbleConnection to connect to a server.

You may find the MumbleSharp library as a NuGet package

Work In Progress

This project is currently only partly functional! The library fully supports all non voice things that mumble can do but voice support is very work in progress (only Opus encoded packets is supported).


I'm only occasionally working on MumbleSharp in my spare time but I'm very happy to receive contributions. If you're thinking of contributing ping me an email ( and I'll try to give you any advice I can to achieve whatever you want. It would be helpful if you open an issue when you start working on something, that's a good way to make sure no one else is duplicating your work as well as being a good place to have discussions.

When contributing it's often useful to reference the Mumble source code.

Things To Do

If you want to contribute here's some ideas:

Jitter Buffer

There is no jitter buffering at the moment. Port the jitter buffering from mumble or implement your own. AudioBuffer.cs is probably the correct place to start doing this.

Other Codecs

Supporting other codecs should be relatively simple. For CELT you'll need to find the correct version of the DLL (check out the Mumble-Protocol.pdf for the version) and then write a wrapper with P/Invoke. For Speex you should be able to use NSpeex.

Looking For VoIP In Unity?

I've developed a VoIP asset for Unity, get it here