What is a FLAC file?
FLAC — lossless compressed audio
What is it?
FLAC compresses audio without discarding a single piece of information. It roughly halves the file size, and the decompressed file is rigorously identical to the original — bit for bit.
It works on the same principle as a ZIP archive: it shrinks the file by identifying redundancies, never throwing anything away. This is nothing like MP3, which permanently discards data.
History & origin
FLAC was released in 2001 by Josh Coalson, then taken over by the Xiph.Org Foundation, which turned it into a fully free, patent-free format.
It became the format of choice among audiophiles and high-resolution music platforms, drawn by the promise of perfect quality without the bulk of WAV.
Why it is useful
Zero loss, half the file size, and rich metadata support — title, artist, cover art, lyrics — none of which WAV can carry.
A free, open format supported by nearly every modern player.
Limits & drawbacks
It remains far heavier than MP3: five to ten times larger, for a difference that very few ears can actually detect in everyday listening.
Apple devices don't support it natively, favoring their own lossless format instead.
Practical tips
FLAC is the ideal format for archiving a music collection: you keep the full quality and can always derive MP3s from it later.
For listening on the go, convert your FLAC files to MP3 or AAC: you'll save considerable space with no audible difference on public transport.
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