It is no secret that the Internet and file-exchanging networks are literally overloaded with music. The plenty of various formats which compress music files just favours this situation. Files in formats with lossy encoding and the highest degree of compression, like MP3, have got the greatest prevalence. While playing such files using cheap acoustic systems one can hardly distinguish their dissimilarity from the original ones, but all the distortions become evident when listening such disks on a Hi-Fi systems or using stereo headphones, especially if one has an opportunity to compare a record with its original. That is why when purchasing traditional CDs with music a question naturally arises whether this or that record is an authentic one or just a fake made by somebody who has just downloaded lossy encoded records from the Internet and recorded them to the blank CDs under the guise of a solid firm.
That is why, after thinking it over for a while, and after reading through what smart men write about this, two cheerful comrades have made a small program that can more or less precisely detect whether your file is authentic or recovered from lossy encoded data. They called it - auCDtect. And a freeware console version of the small program you can download from this site. It is compiled both for Windows and for Linux. It needs the .wav file from the disc you want to check (under Linux it can be created by the cdda2wav program, under Windows - by any CD ripper - search here, for example), so use it and enjoy.