amr
What is a .amr file?
audio/amr
AMR (Adaptive Multi-Rate) is a lossy speech codec optimized for narrowband human voice at very low bitrates, widely used in GSM and UMTS mobile telephony. It is efficient for spoken audio but poor for music. It commonly appears in voice recordings and MMS messages.
How to use a .amr file
Use an example AMR to test speech-codec decoding, voice-recording import, and transcoding of low-bitrate mobile audio to more portable formats.