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| Name | FLAC | M4A |
| Full name | FLAC - Free Lossless Audio Codec | M4A - Audio-only MPEG-4 |
| File extension | .flac | .m4a |
| MIME type | audio/x-flac | video/mp4 |
| Developed by | Xiph.Org Foundation | International Organization for Standardization |
| Type of format | Audio | Media container |
| Description | FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, and is also the name of the reference codec implementation. Digital audio compressed by FLAC's algorithm can typically be reduced to 50-60% of its original size and decompress to an identical copy of the original audio data. | 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. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files. |
| Technical details | The technical strengths of FLAC compared to other lossless formats lie in its ability to be streamed and decoded quickly, independent of compression level. In a comparison of compressed audio formats, FFmpeg's FLAC implementation was noted to have the fastest and most efficient embedded decoder of any modern lossless audio format. | Audio-only MPEG-4 files generally have a .m4a extension. This is especially true of non-protected content. M4A is often compressed using AAC encoding (lossy), but can also be in Apple Lossless format. |
| Associated programs | Windows 10, Android, Blackberry 10 and Jolla devices. | Windows Media Player, RealPlayer, MPlayer, Media Player Classic, VLC Media Player, K-Multimedia Player |
| Wiki | https://en.wikipedia.org/wiki/FLAC | https://en.wikipedia.org/wiki/MPEG-4_Part_14 |