Sustainability of Digital Formats: Planning for Library of Congress Collections

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Audible.Com MP3

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Format Description Properties Explanation of format description terms

Identification and description Explanation of format description terms

Full name Audible.Com MP3
Description Audible.Com wrapper containing an MP3 encoded bitstream. Audible.Com is a seller of recorded sound products, ranging from talking books to archived radio programs, e.g., Car Talk.
Production phase Used for final-state, end-user delivery.
Relationship to other formats
    Subtype of AudCom, Audible.Com File Format
    Contains MP3_ENC, MP3 Encoding

Local use Explanation of format description terms

LC experience or existing holdings None
LC preference General preference for recorded sound is WAVE_LCPM. For compressed audio, MP3_FF is preferred to AudCom_MP3; within the Audible.Com family, however, AudCom_MP3 is preferred to other encodings.

Sustainability factors Explanation of format description terms

Disclosure Not documented
    Documentation See AudCom, Audible.Com File Format
Adoption See AudCom, Audible.Com File Format
    Licensing and patents See AudCom, Audible.Com File Format
Transparency See AudCom, Audible.Com File Format
Self-documentation See AudCom, Audible.Com File Format
External dependencies See AudCom, Audible.Com File Format
Technical protection considerations See AudCom, Audible.Com File Format

Quality and functionality factors Explanation of format description terms

Sound
Normal rendering Good support.
Fidelity (high audio resolution) Good
Multiple channels Apparently not
Support for user-defined sounds, samples, and patches No
Functionality beyond normal rendering Not investigated

File type signifiers and format identifiers Explanation of format description terms

Tag Value Note
Filename extension aa
See AudCom, Audible.Com File Format
Internet Media Type See related format.  See AudCom, Audible.Com File Format
Magic numbers See related format.  See AudCom, Audible.Com File Format

Notes Explanation of format description terms

General  
History  

Format specifications Explanation of format description terms


Useful references

URLs


Last Updated: 02/21/2017