The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. M4A is often compressed using AAC encoding (lossy), but can also be in Apple Lossless format. This is especially true of non-protected content. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.Īudio-only MPEG-4 files generally have a. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files. MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. International Organization for Standardization
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