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Mumble Tutorial - Additional audio configuraiton

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Additional audio configuraiton

mumble audio input configuration
  • Choose your microphone here. [#1]

    Set this to Multichannel echo cancellation [#2]
    There are three options here: [#3]

    • Continuous - No processing. Microphone always on.
    • Voice Activity - Audio processed according to settings. Microphone only on when needed (if settings are good).
    • Push To Talk - No processing. Microphone only on when hotkey is used.

    Continuous should never be used unless you have a good microphone or are in a very quiet room.
    Push To Talk is tedious to use when playing a video game where you may not have time to press the hotkey.

    So the best option to use here is Voice Activity, but most of the time the default settings won't be good.
    Even if you set up your microphone with the audio configuration from the first run, there are still some issues.

  • To start off, speak into the microphone and pay attention to the audio meter (red/yellow/green) [#6]

    If you spoke and the meter started from red and stops in the yellow or green section, then you should be fine with what you have for the Amplitude/Signal to Noise setting [#4]
    If you spoke and...

    • the meter moved all the way from red to the end of the green bar instantly
    • the meter moves all over the place constantly
    • the meter didn't or barely moved at all

    then switch from either Amplitude or Signal to Noise [#4] depending on what is set for you.
    If both Amplitude or Signal to Noise [#4] are both problematic, then choose the less problematic of the two.

    Now slide the Silence Below slider [#6] to the position to where the bar goes to when you are not talking.
    Then make some taps on your desk or other noises that you don't want to be captured by the microphone and slide the Silence Below slider [#6] to the position where the bar goes to.
    Now talk normally and slide the Speech Above [#6] to the position where the bar goes to.

    Whenever you talk now the bar should now be in the green area and whenever you are not talking it should stay in the red or yellow area.
    If this isn't the case adjust these two sliders to achieve this reliably or somewhat reliably.

    You may also have to adjust the [#5] setting for situations where you are done talking, but your microphone is still staying on or
    when you are done talking and your microphone being cut off too quickly.

  • If your audio meter is still inconsistent or are having problems with your microphone being either too loud or quiet, adjust area [#7]

    First adjust the Noise Suppression to a lower negative decibel level (-15dB) if you need your microphone to be louder or to a higher decibel level (-60dB) if you need your microphone to be more quieter.
    If necessary, do the same for the Max Amplification setting. But I highly recommend to try changing other settings before messing with this one since I can recall this causing minor to major quality loss.
    For loud microphones you can try the RNNoise audio filter, but I find that it is only slightly helpful.

    If the microphone volume is either too loud or too quiet and you have a headset with a physical volume slider, adjust this first.
    If the microphone volume is still either too loud or too quiet and the Mumble settings are unable to fix this, you will have to fix this with your operating system settings.

    Go to your Control Panel, Hardware and Sound category and then Sound settings. It should look something like this:
    windows sound configuration

    Right click your microphone and click Properties. Click the Levels tab and here you can adjust your microphone volume and/or microphone boost.
    I'd recommend to only adjust the microphone volume and keep the boost to a minimum, but everyone's situation will be different so you will have adjust accordingly.
    windows sound configuration - microphone levels

    You can also try to apply other audio filters in the Enhancements tab, but the amount/type you see will depend on your microphone.
    I don't bother to use these audio filters so you will have to try them out yourself.

    You can also adjust the number of channels, bitrate, and frequency your microphone uses in the Advanced tab.
    If you can change these values i'd recommend using 2ch/24bit/48000hz if possible.

    Warning! Programs or games that include voice or microphone functionality can potentially mess with your settings in Windows!
    A great example I can give is the game Left 4 Dead. In the game settings you will see a slider to adjust your microphone volume.
    Although it may appear it is only messing with the microphone volume just for the game this isn't the case.
    What ends up happening is that the game links the microphone volume from Windows to the game; so if you mute your microphone for the game it will in turn mute your microphone for Windows which in turn mutes your microphone for Mumble.

    Unfortunately, GNU/Linux has zero standardization's so providing instructions that will work for all GNU/Linux users is impossible.
    Best advice I can offer is to find out your distribution name, desktop environment, and audio system.
    Example of this could be: Slackware (distribution name), MATE (desktop environment), and ALSA (audio system)
    Once you have these three pieces of information you can then search your search engine for something like:

    • alsa microphone volume
    • mate microphone volume
    • slackware microphone volume
    • linux alsa microphone volume
    • linux mate microphone volume
    • slackware linux microphone volume

  • Lastly you may find an issue where a person in your room/channel will hear themselves from your microphone.
    In other words, how do I fix echo???

    The best way to fix this is to make sure you have set the proper setting for [#2] as stated at the top of the page.
    If this still doesn't work, open you audio settings and leave it open. Then have the person complaining about the echo talk.
    You can tell the echo is happening on your end if you are not talking, but see the audio meter go to green.
    Here you can adjust the [#6] and [#5] options so that Speech Above is at the position where the other person is talking and the Voice Hold options only outputs your audio for the duration needed.
    You may still have to adjust other settings in order to completely remove the echo, but most of those settings are noted here.
    In the instance that the echo is happening but it is not on your end you will have to have the other person fix it on their end.