1To get started, upload one or more .m4r files to the converter area.
2Then use the audio conversion settings and click the "Convert" button.
3When the conversion is complete, you can download .ogg files.
M4R
M4R (MPEG-4 Part 14)
M4R is the audio format used by Apple in the iTunes application. M4R files are usually ringtones that you can install on your iPhone. At its core, M4R is a regular M4A (MPEG-4) audio file, and the .m4r extension is used to distinguish ringtones from other melodies. Often the maximum length of an M4K ringtone is limited to 40 seconds. If you downloaded such a file from the music store on your iPhone, you will need to convert it to use on other devices.
File type: Audio
File extension: .m4r
Developed by: Apple Inc.
Initial release: 2001
OGG
OGG (Ogg Vorbis Audio File)
OGG is a multimedia container for storing audio files. OGG is distributed under an open-source license. It is actively used for storing and streaming files in multimedia codecs of the Xiph.org project. It supports 16-128 kbps bitrate and 6-192 kHz sampling rate and provides medium to high sound quality. As conceived by the creators of OGG, it was intended to combine several audios into one file.