OGG to M4R
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| File extension | .m4r |
|---|---|
| File category | Audio |
| Stands for | MPEG-4 PART 14 for iPhone ringtones |
| Developer | Apple Inc. |
| Overview | M4R is one of the extensions of MPEG-4 Part-14 and it is specially designed by Apple for iPhone ringtones. It is just the relabelling of AAC and M4A. This extension provides an excellent quality of ringtones for iPhones and the size of the ringtone is also small. There are certain steps that one needs to follow for the conversion of any song into this format (iPhone ringtone). Firstly, select any song of 30 seconds and covert it to AAC format using iTunes. Then rename this file using .m4r extension. Finally, by using the iTunes transfer your ringtone file to iPhone. This can be done by connecting your iPhone to the computer and syncing the playlist. Now a user can easily use this ringtone for phone ring, alerts, alarms etc. It should be noted that these files will be supported only by the latest version. Hence, use the current version of iTunes. |
| Technical description | It uses a lossy compression algorithm to encode the ringtones that is same as AAC and MP3 eareensions. But it has the additional feature of auditory masking which means it neglects other sounds which can be detected or recognized while listening or hearing another sound. It only discards the information which is surplus for the human ear. This results in good quality of iPhone ringtones. It takes less storage space without affecting the quality of audio. It is also a segment of MPEG-4 standard and this is stated in the ISO-IEC standard 14495-3. |
| Links | wikipedia.org (opens in new tab - official documentation) |
| File extension | .ogg |
|---|---|
| File category | Audio |
| Stands for | Derived from the word Ogging. |
| Developer | Xiph.org Foundation |
| Overview | This extension is an open-source format which means that it can be used by users free of cost and anyone can implement it. The main function of this format is to compress the audio files. It is identical to MP3 file but there is one difference that can not be neglected. That is the sound quality which is better in OGG format. The same size of the file can provide users good quality of audio. It is an unpatented software which implies that no one has the copyright and there are no restrictions on its usage. Moreover, it can also support metadata which can help in storing the artist information and track data. Since 2007 this file is independently used by ‘Vorbis' audio files. |
| Technical description | The word OGG has been derived from the word ‘Ogging’ which is jargon or parlance(a technical slang) in a computer game named ‘Netrek'. This format is accessible in almost all the software of music players but there is one exception that is Apple. It allows various data streams to be entrenched or embedded in a solo file along with stream data as it has a container format. This codec has the capability of transferring and obtaining the independent signals over the same signal path by means of synchronized switches, which enables independent streaming of audio, video and text. Although, it is not a popular format as of MPEG standards, yet, it is beneficial for those who want to study and apply what is learned because of its free content. |
| Links | wikipedia.org (opens in new tab - official documentation) |
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