M4R to AMR Converter
Free online conversion from M4R file to AMR
iTunes Ringtone File
M4R is a compressed audio format used by iTunes as a ringtone file due to it only supporting mono sound.
Adaptive Multi-Rate ACELP Codec
Is a file used to store compressed audio data. It was originally developed by Ericsson for use on their 3G mobile devices.
Steps to Convert M4R to AMR
Drag and drop your M4R audio file(s) into the blue box or click "choose a file" to select from your computer.
Review each file to check if it is indeed the one you want to convert. If not click the trash button and select a new one.
Click the convert button. Your file(s) will begin to upload and the status of the conversion process will be shown.
Once the conversion process is complete a list of your new AMR's will appear. Click the "download" link to save the file to your device.