Finding out if a FLAC or WAVPACK audio file is NOT originally encoded from a lossy source

Posted by cornel on Super User See other posts from Super User or by cornel
Published on 2010-04-30T19:40:02Z Indexed on 2010/05/01 0:59 UTC
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flac

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lossless

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audio-encoding

Is there a way of checking that the so-called FLAC or WAVPACK audio file was originally encoded from a lossless source (WAV, CDA, APE, etc.) instead of a lossy source (MP3, AAC, ATRAC, etc.)?

Say I have a lossy MP3 audio file (5.17Mb, 87% compressed from its original, source unknown). I then encode it to another lossless format, say FLAC or WAVPACK.

The size increases (23.14Mb, 39% compressed from its original, source MP3)! ID tags, etc, remain the same and there's no way of checking the integrity of its origin.

How do I go about doing that?

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