 |
How to Rename the File Extension From M4A to M4R | eHow
Apple's M4R ringtone format is identical to its more common M4A audio format -- the M4R extension simply identifies the file as a ringtone. If you want to use an M4A file as an Apple ringtone, you can change its extension to M4R manually. File extensions
www.ehow.com |
 |