Use apps like Media Coder to convert almost any format to any format including to FLAC or WAVE. So mp3 can be converted to lossless compression or uncompressed but that doesn't mean it's going to recover the losses it had suffered in the compression process.
Think you have not understood ..What was asked was regarding upconverted MP3 to FLAC....This is very much possible and has been discussed on various fora ....It appears that there is no fool proof way to detect via software..There have been references to some software like Tau Analyzer / seeing spectrum etc...
What you are saying is that information lost cannot be recovered. ..Which is true ..and which is not being debated.
Well there is no way you can up convert an audio file. Converting MP3 to FLAC might feed in more bits and the application might show 1000kbps, but that does not mean the audio gets its information back, the inserted bits are nothing but empty.
Also per the OPs original query and
stereorules insight I did some research and it does seems that even
mediainfo does not provide accurate information AFA bits and sampling is concerned and hence can not be used for FLAC authentication.
mediainfo just shows what the a media file property would have (eg 1400kbps for WAV), which is misleading. I apologies for pointing people in that direction.
However I sill managed to get hold of an application which actually is able to differentiate between an authentic FLAC (done through CD rip) or just an MP3 conversion. This time I did my own research and the application seems to work well and best part its free ..... its called
AudioChecker. Just open any audio file and click on Start. Also when you will load the application it would give a small win32 error,which can be ignored. After a few seconds, the application will give the result if the audio is actual CD rip FLAC or just converted MP3 (mpeg) FLAC, with color codes as well ....."Green" means Original RIP FLAC, "Yellow" means fake MP3 converted FLAC.
Following are the screen shots for the same
1. Original FLAC ( the same which I posted an an example with
mediainfo)
you can see that it clearly says "
Track is CDDA with probability 100%". Also note the color code which is
green
2. Second example is a track which I myself converted from MP3 to FLAC and tested on this application. You can again clearly see it says "
Track is MPEG". color code here also is
Yellow, indicating its a fake FLAC
Hope this should solve the original MP3, fake FLAC confusion...