Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming. This Wiki provides Documentation for the Mumble project. This includes documentation for the main software, client and server, its use, other project applications, other project related stuff, and also some information on third party. Mumble is a voice chat application for groups. It has low latency and superb voice quality, and features an in-game overlay. While it can be used for any kind of activity, it is primarily intended.
Mumble is an open source VoIP system. A VoIP server called Murmur is installed on RSS along with the Mumble client. The RigPi Audio board normally provides an input and output path for Mumble client, although USB audio sound devices or radio CODECs can also be used. One radio can be connected to the Mumble client. Remote Mumble clients can also connect to the server and receive and send audio. Mumble clients are available for all popular operating systems.
The Murmur Server is named RigPi VoIP Server and the configured Mumble Client is named pi. Mumble can be started manually from the RSS Desktop Menu by selecting Internet>Mumble. A utility named Mumble Autostart is in the Internet menu as well as on the RSS Desktop. Run Mumble Autostart to have Mumble start automatically when RSS is rebooted.
When you start Mumble the Mumble window opens on RSS:
MumbleSettings
Put a check in Mumble Configuration Advanced.
Mumble normally uses RigPi Audio for input and output audio. Set Device to [default] in Audio Input and Audio Output.. You can also use USB soundcard dongles or radio CODECs with RigPi Mumble.
In Mumble client, use [sysdefault:CARD=sndrpiproto] snd_rpi_proto, Default Audio Device if using the RigPi Audio board. If using a radio CODEC, use [default].
Refer to Mumble Help for setting up Mumble. One setting that applies to Mumble in RSS is found in the Audio Processing group of Mumble Configure>Settings>Audio Input. Set the Noise Suppression to Off with the slider moved to the left end. If Noise Suppression is enabled the normal background noise on HF can cause distortion and clicking in the audio output. (See screen shot below.)
Mumble can send audio continuously, by use of a PTT key, or by detecting the presence of audio. The screen shots below are shown below to include all audio in and audio out settings. The settings shown are typical. You will have to adjust them to maximize audio quality with your RigPi.
In Mumble Configure>Settings>Network enable the 'Reconnect automatically' and 'Reconnect to last server on startup' options.
Turn on Advanced Settings to see the full settings windows. This is a checkbox in the lower-left hand side of the Settings screen. This reveals many options that aren't visible by default.
Audio Input
Transmit: This lets you change what causes audio from your radio to be sent. We recommend 'Continuous', but you can also have Mumble attempt to transmit only when there is active audio from your radio.
Audio Cue: This causes a sound to play whenever you press or release the Push-To-Talk key. Not active when Continuous Transmission is selected.
Idle action: This will cause Mumble to automatically mute the receive audio if there is no radio audio for a certain amount of time. Dragging this slider all the way to the left will disable this feature.
Quality: This is the quality at which Mumble will encode audio from your radio. We recommend that you leave this at 40.0 kb/s. However, if the audio sounds distorted, you can try raising or lowering this value.
Audio per packet: This is the amount of audio that Mumble sends at a time. A lower value means less latency, but might potentially introduce quality loss, if too low. We recommend that you leave this at 20 ms.
Noise Suppression: Mumble will automatically filter out static background noise. This slider will adjust how aggressively noise is filtered. If filtering is too aggressive, then your voice may become distorted. We recommend setting it to 0 to remove all noise suppression. Noise suppression can add a watery quality to your receive audio/
Max. Amplification: This setting controls how loud the receive audio is.
Audio Output
Default Jitter Buffer: If your mic audio is distorted, metallic, or robot-y, try increasing this setting a notch or two.
Volume: Output volume. The volume at which audio is sent to the mic/audio input.
Output Delay: If your transmit audio is distorted or is breaking up, try increasing this value.
Mumble Voice Chat
Attenuate applications by...: This setting determines how much Mumble will reduce other applications' volume when people talk. A setting of 100% means to mute other applications; 0% means to not do anything to other applications. Additionally, you can select to attenuate when others talk, and/or when you talk with the 'while other users talk' and 'when you talk' checkboxes.
Loopback: This is a super handy feature for troubleshooting problems with your transmit audio settings. You can set Mumble to 'loop back' to you, so you hear what you are saying the way other people will hear you. When troubleshooting, try setting this to 'Server', and then tweak options in Audio Input and Audio Output to get your audio sounding just right. Remember to set it back to 'None' after you're finished, or else nobody will be able to hear you
Managing Accounts
If you wish to remove clients that have been registered, set up a new user with username SuperUser. The SuperUser can delete registered accounts.
Using a Remote Server
RSS is not restricted from using an external Mumur server. If RSS is connected to the Internet and you expect to have a large number of users, a remote Murmur server may be attractive.
Murmur servers are available for free or low cost. Commercial server companies typically charge based on the number of 'slots' you want to use. A slot is a unique user logged in to the server. Server fees typically run less that $2 per month per slot. Details for connecting to a remote server are beyond the scope of this manual, but instructions are usually given on the server you choose.
Running more than one Mumble client
Since RSS is multi-user, one wonders if it is possible to run audio from more than one radio through RSS. The short answer is yes! RSS can serve multiple users for rig control AND audio.
There are two requirements.
1.You need one (or more) audio IO devices in addition to RigPi Audio. This can be done with a USB audio dongle. For my tests I used a Griffin dongle, but any inexpensive USB/Audio device should work well.
Mumble Voice Chat
2.The second (and subsequent) Mumble clients must be started in a special way.
Close any open Mumble clients on the Raspberry Pi desktop. To start the first and later clients, go to the RSS Desktop Menu and open Run... In the Run box, type
/home/pi/mumble/release/mumble -m
then press enter, and off you go. The -m parameter signifies a multiple instance.
Now you can log in. I used pi2 as the username. With two clients you see both users in the client lists, pi and pi2. The user connected with its primary client is shown in bold. Assign the audio dongle to the second client. Now you can connect the audio to/from two rigs.
Since all users hear all other users, you will hear audio from both radios. That has interesting possibilities, such as monitoring 2 repeaters at once. You may want to keep the audio from the two radios separate, in which case there is a way to do that. Mumble provides channels, users can be assigned to channels, and the audio is separated. From a remote device you can create two accounts, one for each channel. To switch from one channel to the other, log out from the Mumble client on the remote device and log in to the other account.
To create channels, log in to Mumble with the username SuperUser. Superusers can create channels and assign users to default channels.
Install Bonjour
The Mumble server requires that Bonjour be isnatllled on your computer for clients to connect. If you are using a Windows computer, follow the instructions here. Mac omputers already have Bonjour installed.
Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming. Mumble has an extremely fast response time offering high-quality audio with extremely low ms. This allows audio to be heard in a more real-time manner as opposed to other VoIP software such as Ventrilo, Teamspeak, Skype, Raidcall and others.
An in-game overlay is also available which displays users talking in the channel. Snapshot builds offer FPS and time in the overlay as well.
A special element of Mumble is its Positional Audio feature. Mumble's Positional Audio feature is facilitated through the use of a memory-mapped file using the Link plugin format. Guild Wars 2 provides the necessary positional data to the memory-mapped file, which in turn is accessed by Mumble to provide the positional audio effect. API developers can access the memory-mapped file in order to read character information that includes position and map identification, to name a few.
For documentation on the data contained within the MumbleLink file, see API:MumbleLink
Teamspeak
External links[edit]
See also[edit]
Mumble Download