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Convert OGG to M4A
What is OGG?
Ogg Vorbis is a high-quality lossy audio compression format. If you need CD-quality sound, neither OGG Vorbis nor MPEG-1 audio layer 3 (nor any other lossy audio codec) can provide exact reproduction; instead, consider using a lossless audio compression scheme like FLAC or APE. Ogg Vorbis is designed for the compression of music and general purpose audio. Special purpose codecs can achieve much greater compression of speech than OGG Vorbis.
Ogg Vorbis will likely be considered one of the most exciting developments in music history. As a creator of music, nothing is more important than getting your music heard. But, how can a creator of music be sure that the music he produces today isn't restricted in the future? Ogg Vorbis is truly open source and royalty free. A musician can create Ogg files and never have to worry about the music being restricted.
If you like Ogg Vorbis, you'd better encode from original, lossless audio sources (like CDs) so that you can get better sound quality. If you have ogg files already and want to listen to ogg songs on portable ipod player, mobile phone, itunes or windows media player, you will need to change ogg files to wma, aac, m4a, mpeg-1 audio layer 3 formats.
What is M4A?
M4A stands for MPEG-4 Audio, and it is a popular audio file format. Most people are familiar with MP3 and how it shrinks down the file size of songs and other audio files. M4A does the same thing as MP3 does, but even better. Quality is better and file sizes are usually smaller than MP3 files.
What is the difference between M4A and MP4 files?
The existance of 2 different file extensions that can be used to represent MPEG 4 Audio files is unfortunate. MP4 files may or may not contain MPEG 4 Audio. If you see a M4A file you always know that it contains only MPEG 4 Audio. MP4 can be used for MPEG 4 video files, combined video and audio files, or just plain MPEG 4 audio. It is recommended that you use the .m4a file extension rather than .mp4 on your audio files.