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{{Notice |message=This page is missing some parts and might be extended in the future. }}

= Introduction =

Mumble features various Audio Options and Features, this wiki page will describe them and tell you which settings are best for your setup.

= Audio Input - Options =

Interface

Echo Cancellation

If enabled, this will filter echo from the audio you send to others.

You should enable it in the following cases:

  1. You use conventional loudspeakers and no headset:
    This Setup will usually create echo, so you will need echo cancellation.

  2. Headset transmits echo, though it shouldn't:
    Some Headsets tend to transmit echo, the reasons for this include: bad cable and noise isolation or the microphone is to close to the loudspeakers of the headset.

Two options are implemented (you can choose one of them):
{| class="wikitable" |- ! Option: !! Description: !! Usecase: |- | 1. Mixed echo cancellation || This is the basic Option: It will process all loudspeaker outputs bundled together.
This is less accurate than the Multichannel option, but will also use less CPU. || Sufficient for setups with loudspeakers near to the microphone.

|- | 2. Multichannel echo cancellation || Extended option: It will process all audio channels seperately, this is more accurate, but will result in higher CPU usage. || For setups with (multiple) loudspeakers farther away from the microphone. |}

In case of doubt:

  1. Try ''Mixed echo cancellation'' first.
  2. If ''Mixed echo cancellation'' does not filter the echo correctly, try ''Multichannel echo cancellation''.

'''Alternatives:'''
You can also use external echo filters.

{{Notice |message=In this case you should deactivate the echo filters in Mumble (to avoid interference). }}

Examples for external echo filters:

Audio Processing

RNNoise

RNNoise is a noise suppression library.
It is intended to filter background noises from the audio that is sent to other users.
RNNoise uses a deep learning algorithm so it should work better than most regular filters.

More information can be found on various websites:

= Audio Output - Options =

= Technology =

In this section we take a short look at the technology behind the scenes.