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 & 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.

Import Elements

  • 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 by default uses the "Audio" element for short MP3 files and the "AudioFile" element otherwise.
  • 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
  • Metadata elements:
  • "MetaInformation"interpreted metadata as quantities, dates, locations, etc.
    "RawMetaInformation"uninterpreted metadata including strings and numbers only
  • Available metadata tags include ID3v1, ID3v2 and APE.
  • Multiple channels are represented as an array of audio samples.



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Basic Examples  (2)

Import an MP3 file:

Click for copyable input

Generate an audio signal and export to MP3:

Click for copyable input
Click for copyable input

Scope  (4)

Import Elements  (14)

Import Options  (6)

Export Options  (5)

Introduced in 2014
Updated in 2018