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AudioLength[audio]

returns the number of samples in the Audio object audio.

Details
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Examples  
Basic Examples  
Scope  
Properties & Relations  
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AudioLength

AudioLength[audio]

returns the number of samples in the Audio object audio.

Details

  • AudioLength returns the actual number of samples stored in each channel of the Audio object.
  • The duration of an audio is computed as the number of samples divided by the sample rate.

Examples

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Basic Examples  (2)

Number of samples of an Audio object:

Wolfram Language code: AudioLength[\!\(\*AudioBox["![Embedded Audio Player](audio://content-d7pn4)"]\)]

Number of samples of an audio file:

Wolfram Language code: AudioLength[\!\(\*AudioBox["![Audio Player: ExampleData/rule30.wav](audio://content-r433a)"]\)]

Scope  (1)

Length of a mono audio:

Wolfram Language code: AudioLength[\!\(\*AudioBox["![Embedded Audio Player](audio://content-kloe4)"]\)]

Properties & Relations  (1)

Compute the duration from length and sample rate:

Wolfram Language code: a = Audio["ExampleData/car.mp3"];
Wolfram Language code: length = AudioLength[a]
Wolfram Language code: sr = AudioSampleRate[a]
Wolfram Language code: N[QuantityMagnitude[length] / QuantityMagnitude[sr]]

This would be the same as what Duration computes:

Wolfram Language code: Duration[a]
Wolfram Research (2016), AudioLength, Wolfram Language function, https://reference.wolfram.com/language/ref/AudioLength.html.

Text

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

CMS

Wolfram Language. 2016. "AudioLength." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/AudioLength.html.

APA

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

BibTeX

@misc{reference.wolfram_2026_audiolength, author="Wolfram Research", title="{AudioLength}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/AudioLength.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_audiolength, organization={Wolfram Research}, title={AudioLength}, year={2016}, url={https://reference.wolfram.com/language/ref/AudioLength.html}, note=[Accessed: 12-June-2026]}