[LAU] Lossy audio to lossless format

[Egor Sanin]

Dear community,

While not directly a linux related question,
I am wondering about ultimately using linux
tools for the possible solution, so:

I get the feeling at times, when getting music
from torrents and such, that not all files
claiming to be flac are actually lossless.
It seems that sometimes folks will take an
mp3, reencode it in flac and distribute the
result.

Now the question is whether it is possible to analyze an
audio file encoded in a lossless format and
determine if it existed as a lossy file in a
previous life?

Any insight is appreciated.

Thanks.