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Wolfram Language & System Documentation Center
AudioChannelMix
  • See Also
    • AudioChannels
    • AudioChannelCombine
    • AudioOverlay
    • AudioChannelAssignment
    • AudioJoin
    • AudioTrackApply
  • Related Guides
    • Audio Editing
    • Video Computation: Update History
    • See Also
      • AudioChannels
      • AudioChannelCombine
      • AudioOverlay
      • AudioChannelAssignment
      • AudioJoin
      • AudioTrackApply
    • Related Guides
      • Audio Editing
      • Video Computation: Update History

AudioChannelMix[audio]

mixes channels of audio by averaging and returns a center-panned stereo audio object.

AudioChannelMix[audio,desttype]

mixes audio channels into the specified desttype.

AudioChannelMix[video,…]

mixes audio channels of video.

Details
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
Applications  
Properties & Relations  
See Also
Related Guides
History
Cite this Page
BUILT-IN SYMBOL
  • See Also
    • AudioChannels
    • AudioChannelCombine
    • AudioOverlay
    • AudioChannelAssignment
    • AudioJoin
    • AudioTrackApply
  • Related Guides
    • Audio Editing
    • Video Computation: Update History
    • See Also
      • AudioChannels
      • AudioChannelCombine
      • AudioOverlay
      • AudioChannelAssignment
      • AudioJoin
      • AudioTrackApply
    • Related Guides
      • Audio Editing
      • Video Computation: Update History

AudioChannelMix

AudioChannelMix[audio]

mixes channels of audio by averaging and returns a center-panned stereo audio object.

AudioChannelMix[audio,desttype]

mixes audio channels into the specified desttype.

AudioChannelMix[video,…]

mixes audio channels of video.

Details

  • The following destination type desttype can be specified for an m channel audio object:
  • "Mono"mono signal, using the average channel value
    {"Mono",{w1,…,wm}}mono signal, using a weighted average
    "Stereo"stereo signal, using the average value and center panning
    {"Stereo",{w1,…,wm}}stereo signal, using weighted average and center panning
    {"Stereo",{w1,…,wm},{p1,…,pm}}stereo signal, using weighted average and specified panning
    nn-channel signal, evenly distributing the m input channels
    {n,mat}n-channel signal, using an arbitrary m×n distribution matrix mat
  • In the distribution matrix mat, the element wij is the amount of input channel i that goes into the output channel j.
  • The given weights wi can be given as scalar multipliers or in decibels.
  • A scalar multiplier wi is equivalent to in decibels.
  • For "Stereo" mixing, sinusoidal panning is used.
  • The AudioType of the returned object is either "Real32" or "Real".

Examples

open all close all

Basic Examples  (1)

Convert mono audio to stereo:

Downmix stereo audio to mono:

Scope  (5)

When downmixing to mono, the average of all input channels is used by default:

Specify the weights assigned to the input channels:

When mixing to stereo, the average of all input channels is replicated on both output channels by default:

Use different weights for each input channel:

By default, all input channels are center panned. Specify the amount of panning for each input channel:

Create a three-channel signal by evenly mixing all input channels:

Specify all weights using a distribution matrix:

Specify weights in decibels:

Process the audio track of a video:

Applications  (2)

Conform the number of channels of a list of audio objects without using padding:

Distribute a mono Audio object to an arbitrary number of output channels:

Properties & Relations  (4)

Downmix a signal to a single channel using audio arithmetics:

If no weights are specified, the average of the input channels is replicated on all output channels:

Relation with Dot:

If the destination is "Stereo", the panning specification is equivalent to an AudioPan operation:

See Also

AudioChannels  AudioChannelCombine  AudioOverlay  AudioChannelAssignment  AudioJoin  AudioTrackApply

Related Guides

    ▪
  • Audio Editing
  • ▪
  • Video Computation: Update History

History

Introduced in 2016 (11.0) | Updated in 2024 (14.1)

Wolfram Research (2016), AudioChannelMix, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioChannelMix.html (updated 2024).

Text

Wolfram Research (2016), AudioChannelMix, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioChannelMix.html (updated 2024).

CMS

Wolfram Language. 2016. "AudioChannelMix." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2024. https://reference.wolfram.com/language/ref/AudioChannelMix.html.

APA

Wolfram Language. (2016). AudioChannelMix. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/AudioChannelMix.html

BibTeX

@misc{reference.wolfram_2025_audiochannelmix, author="Wolfram Research", title="{AudioChannelMix}", year="2024", howpublished="\url{https://reference.wolfram.com/language/ref/AudioChannelMix.html}", note=[Accessed: 01-March-2026]}

BibLaTeX

@online{reference.wolfram_2025_audiochannelmix, organization={Wolfram Research}, title={AudioChannelMix}, year={2024}, url={https://reference.wolfram.com/language/ref/AudioChannelMix.html}, note=[Accessed: 01-March-2026]}

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