Information with the file extension M4R are related to the Apple iPhone ringtone format. Launch HD Video Converter Pro, click on "Ringtone Studio" on the higher proper, after which choose IOS. Click on on "Add File" and add the M4A audio t…

Preparation: Free download M4A to M4R Converter, install it, run it. Quite the opposite, MP3 (MPEG-1 Layer 3) is a universal compressed and extensively used audio format, and supported by practically any players and devices like iPhone, iP…