Wolfram Language & System 11.0 (2016)|Legacy Documentation

This is documentation for an earlier version of the Wolfram Language.View current documentation (Version 11.2)

MP3 (.mp3)


    MIME types: audio/mpeg, audio/mpeg3, audio/x-mpeg-3MP3 digital audio format, known as MPEG Audio Layer 3.
    A lossy compression scheme commonly used for consumer audio streaming, storage, transfer, and playback, which can also be used on the web.
    Binary file format.
    Follows the ISO/IEC 11172-3 and ISO/IEC 13818-3 standard.
    Supports a few sampling frequencies from 8kHz to 48kHz.
    Supports up to two audio channels.

Import and ExportImport and Export

  • Import["file.mp3"] imports an MP3 file, returning an audio object.
  • Import["file.mp3",elem] imports the specified element from an MP3 file.
  • The import format can be specified with Import["file","MP3"] or Import["file",{"MP3",elem,}].
  • Export["file.mp3",expr] exports an audio or sound object to an MP3 file.
  • Sound objects including notes are rasterized to sampled audio.
  • See the reference pages for full general information on Import and Export.
  • ImportString and ExportString support the MP3 audio format.


  • General Import elements:
  • "Elements"list of elements and options available in this file
    "Rules"full list of rules for each element and option
    "Options"list of rules for options, properties, and settings
  • Data representation elements:
  • "Audio"audio signal given as an Audio object
    "AudioFile"audio signal given as an out-of-core Audio object
    "Data"raw audio samples, given as a list of real numbers, each sublist representing an individual audio channel
    "SampledSoundList"audio signal given as a SampledSoundList object
    "Sound"audio signal given as a Sound object
  • Import and Export use the "Audio" element by default for MP3 files.
  • Advanced Import element:
  • "AudioChannels"number of audio channels
    "Duration"duration of the audio given in seconds
    "Length"number of samples
    "SampleRate"number of amplitude samples per second and channel
  • Multiple channels are represented as an array of audio samples.


  • Import and Export option:
  • SampleRateAutomaticnumber of amplitude samples per second for each channel
  • Export options:
  • "AudioChannels"Automaticnumber of audio channels
    "CompressionLevel"0.5compression level, given as a number between 0 and 1
  • Supported Export sample rates in Hz are 8000, 11025, 16000, 22050, 24000, 32000, 44100, and 48000.

ExamplesExamplesopen allclose all

Basic Examples  (2)Basic Examples  (2)

Import an MP3 file:

Click for copyable input

Generate a sound and export to MP3:

Click for copyable input
Click for copyable input
Introduced in 2014
| Updated in 2016