What is M4A
M4A is audio format developed by Apple Inc. Saying to M4A we have to mention Apple Lossless (also known as Apple Lossless Encoder, ALE, or Apple Lossless Audio Codec, ALAC) is an audio codec for lossless data compression of digital music. And the Apple Lossless data’s filename is .m4a. The M4a file format features lossless compression, meaning that the file is made smaller to take up less space on your computer without sacrificing any quality. Because of this, the M4a file sounds identical to the original source of the audio. M4a format files that contain copyright restrictions to limit file sharing are often saved with the .mp4 file extension rather than the .m4a extension.
Applications of M4A
The extension is used by Apple for AAC audio data in an MP4 container (same container, different audio encoding). However, Apple Lossless is not a variant of AAC (which is a lossy format), but rather a distinct lossless format that uses linear prediction similar to other lossless codecs such as FLAC and Shorten. All current iPods and iPhones can play Apple Lossless-encoded files. It does not use any digital rights management (DRM) scheme, but by the nature of the container, it is thought that DRM could be applied to ALAC much the same way it can with other files in QuickTime containers. The most common programs for playing M4a format files are iTunes, Apple QuickTime Player and Windows Media Player, which are available for both Mac OS X and Windows computers.