Make AMR Files

AMR (short for Adaptive Multi-Rate) is an audio format particularly used in 3G mobile phones for creating short audio recording.

Because its features an integrated ACELP algorithm, the AMR format compresses human speech at great audio quality.

AMR is very popular in GSM and UMTS mobile phones, therefore users have started to convert their audio files to AMR and use them as ringtones.

Before actually converting their audio files to the AMR format, users have the option to modify the sample rate or bit rate of the source file.