[flac-dev] FLAC 1.3.0pre3 NOT lossless
Martijn van Beurden
mvanb1 at gmail.com
Mon Apr 15 09:03:47 PDT 2013
On 15-04-13 17:54, Marcus Johnson wrote:
> the audio was also 192,000khz sample rate, forgot to mention that, adn
> here are the audio files, the original, the flac, and the decoded from
> the archive is 7zip, Idk where to upload it so I'll just send it to
As far as I can see, these audio files are lossless and the WAV files
are identical when regarding only audio data. When I open both in
Audacity and invert one of them, the channels cancel each other exactly,
so the audio data must be the same.
The checksums don't have to match because WAV is a complicated standard
and FLAC might be writing the file a little different (see for example
http://xiph.org/flac/faq.html#tools__two_bytes_short) FLAC compresses
the audio data losslessly, not the WAV file itself, that's why simple
MD5-summing doesn't cut it.
The FLAC file is small and encoding is very fast because most of the
file is silence, which is very easy to encode.
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