True FLAC vs. Fake FLAC Options

[XeR0]

I know the topic title sounds absolutely absurd but hear me out. I've tested my FLAC collection by encoding them into V0 MP3. I then decoded the MP3 back to WAV and then compressed it in FLAC. My question is: unless you've ripped the files yourself, how would you know the FLAC file you have is ACTUALLY lossless instead of an MP3 converted into FLAC? I've used the TEST option in FLAC frontend and it doesn't give a result. I have used Audiotester and it does say the file failed because it's TRUNCATED.

Bottom-line: Is there a sure-fire way of knowing that a FLAC file is truly lossless and not a derivative of a lossy file?

This post has been edited by XeR0: Jun 29 2011, 19:59

[greynol]

...recorded from the radio, or simply low-pass filtered.

There is also the real possibility that the CD was sourced from such data. There have been examples of this happening with legitimate CDs posted on this forum and elsewhere.

[Canar]

There is also the real possibility that the CD was sourced from such data. There have been examples of this happening with legitimate CDs posted on this forum and elsewhere.

My personal favourite anecdote was buying a music CD by Orbital from Hong Kong. It was silver and pressed, but had no catalog number and was audibly MP3 sourced. I later found the MP3s that they had sourced from. The artifacts matched.

This post has been edited by Canar: Jun 29 2011, 21:30