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FLAC, or Free Lossless Audio Codec, is a compressed, lossless audio format. It uses a perceptual algorithmic coding method which is very similar to that used by the Monkey’s Audio codec. The resultant compressed files typically take up about 50-60% of the space of the original uncompressed files, so it saves a lot of space compared to uncompressed WAV files, but the audio is still as good as the original when it is decompressed. This is because, unlike lossy formats such as the popular MP3, nothing is discarded in the process, so the original data can be perfectly recreated.