![]() Instead, MP3 files use perceptual coding. That means that an MP3 file does not contain 100% of the original audio information. This then enables you to get hundreds of songs on to a CD and it also has opened up a new market over the internet - the download market as download times have been significantly reduced. ![]() MP3 gets rid of a lot of the information recorded in a song that our ears are not able to hear and then uses complex algorithms to reduce the file size. MP3 is a digital music format which allows CD tracks to be reduced to around a tenth of their normal size without a significant loss of quality. Additionally m4v provides the functionality to create chapter information which is not possible with MP4. In certain circumstances where Apple's DRM has not be applied to the file, it is possible to play the file from a different unauthenticated computer by amending the file extension from. The M4V file is a container that allows audio and video. ![]() If M4V file does have DRM enabled then the iTunes account used to procure the file will need to be authenticated on the computer playing the file. Video content downloaded from the iTunes store is likely to be in M4V format. ![]() It is very similar to the MP4 file type, with the main difference being that M4V may contain Apple's DRM protection, Fairplay. The M4V file format was developed by Apple.
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