Lossy compression is designed to reduce significantly 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 and 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 that uses lossy data compression. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files. However, it can also be used to store other data such as subtitles and still images. MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio. International Organization for Standardization

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