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.AMR File Extension

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Adaptive Multi-Rate Codec File Icon
File TypeAdaptive Multi-Rate Codec File
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CategoryAudio Files
File Format Description

Compressed audio format developed by Ericsson; used by many 3G cell phones for voice recordings such as MMS messages; incorporates the Algebraic Code Excited Linear Prediction (ACELP) algorithm, which is designed to efficiently compress human speech audio.

NOTE: AMR files may be saved in either the AMR-NB (Narrowband) or AMR-WB (Wideband) format. Wideband audio supports a broader frequency range and therefore provides better sound quality.

Program(s) that open .AMR files
Updated 8/19/2014