What is the difference between .m4r and .ra?
- Extension
 - .m4r
 - .ra
 
- Format
 - Binary
 - Binary
 
- Category
 - Audio
 - Audio
 
- Developer
 - Apple Inc.
 - RealNetworks
 
- Description
 - M4R is an iTunes ringtone file that stores mono channel audio. They are identical to the M4A format files only that they are correctly used for ringtones.
 - RealPlayer created RA for audio streaming. It makes use of various audio codecs from those that deliver high-fidelity sounds to those that record low bitrate audio data. Radio stations mainly used it for online streaming, but current formats have overthrown it.
 
- MIME Type
 - audio/x-m4r
 - audio/vnd.rn-realaudio
 
- Wikipedia
 - .m4r on Wikipedia
 - .ra on Wikipedia