Mumble

Documentation

Authentication
Login as super user

Use headphones

Mumble is best used with headphones for audio output. Otherwise ringing might occur
To protect at least one ear against loud audio output it might be a good idea to use only the left or right output channel of the headphones

Wrong certificate or password

Possible cause: You are using a username which is already in use. Solution: Use an other username. Also du not use a username with spaces or illegal characters

Settings

These can be found in the Menu: Configure > Settings…

Tab Audio Input

Item Transmission > Transmit. Here you can set three options

Option	Explanation
Continuous	Your speach is not muted. It is on all the time
Voice Activity	Your sound is automatically switched on (when you speak) and of (when you make no noise). Some items popup when you activate Voice Activity. Explanation: see below
Push to talk	Normally your sound is muted. You an unmute by pressing a button. Set up push to talk. To restore the push to talk window do: Configure > Settings > Left column: Shortcuts > Add push to talk or click on the push to talk entry > Apply > Ok

Voice Activity settings:

Amplitude
Voice Hold - Experiment with the settings
Silence below - Experiment with the settings
Speech above - Experiment with the settings

Chatbox disappeared

The “Type message to channel 'Root' here” pane in the bottom left can be missing. To restore it do: Configure | Settings and click on OK. Now the pane should appear

File locations

Database, Mumble version 1.3+	$HOME/.local/share/Mumble/Mumble/mumble.sqlite
Settings	$HOME/.config/Mumble/Mumble.conf

Issues

No sound

Check the Pulse Audio Volume Control Settings
Check in the Mumble Client if the microphone is undeafened
Check in the Mumble Client if the speaker is unmuted

Murmur

Murmur is the server component for Mumble

aptitude install mumble-server
dpkg-reconfigure mumble-server
Check if murmurd is running with murmur-user-wrapper -s
Now you can edit $HOME/murmur/murmur.ini to your needs

Firewall settings

The default port for a Murmur server is UDP and TCP 64738

Android clients

Mumla

Mumla can be found in the F-Droid appstore
We did not find any trouble in setting it up. So no manual here. If you have any questions please let us know

Plumble

Warning: Plumble is no longer maintained

This description is valid for setting up Plumble version 3.2.0.

Make sure you have a working Internet connection
Click on the + sign in the upper right corner
Label: Enter a name for the connection
Address: Enter a domainname or IP address. Leave the portnumber as it is: 64738
Username: Enter a username. Usernames can contain underscores, can not contain spaces
Password: If needed enter it. Otherwise leave it empty
Tap on “ADD”
Goto Settings. Tap on the Ξ sign in the upper left corner
- Tap on “Settings” at the bottom of the list
- Tap on General
  - Chat Notifications: On
  - Text-to-Speech: Off
  - Load External Images: Off
  - Auto Reconnect: On
  - Force TCP: Off
  - Connect via Tor: Off
- Authentication
  - Tap on “Certificate File”. Check if a certificate is selected
    - If not select one.
    - If there are no certificates to back an tap on “Generate Certificate”. A certificate is generated
  - Default Username. Leave empty or make up a username and enter it. Tap on “OK”
  - Clear Server Certificates. Do not touch it
- Audio
  - Transmit Mode: As you like it. For testing “Continuous” can be handy
  - Handset Mode: On
  - Microphone volume 100%
  - Voice Activity Settings
    - Detection Treshold: Experiment
  - Push to Talk Settings
    - Push to Talk Key: What you like. Most phones do not have a key which is handy for Push to Talk
    - Push to Talk Hot Corner: What you like
    - Push to Talk Sound: Turn off (handy for testing though)
    - Hide Push to Talk Button: What you like
    - Toggle Push to Talk: Off
    - Half Duplex Mode: On
  - Advanced
    - Input Sample Rate: 11025Hz is sufficient. Higher should give better sound quality
    - Input Quality: 40000 bps
    - Audio per Packet: 20ms
    - Enable Input Preprocessor: On
    - Disable Opus Codec: Off
- Appearance
  - Theme
    - Choose what you like. We choosed “Dark”
- About: All kinds of information
Close settings
Tap on the connection you made
- You will get a popup window “Untrusted Certificate” (or maybe a trusted certificate). If you trust is tap on “Allow”

Errors

Connection refused Reject Invalid username

You probably forgot to set a username

The other participants can not hear you

Check the audio settings.
Check if you use the right input device and the other participants the right output device
May be when you are testing locally you are listening on the wrong audio device / output of your computer

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