Sometimes I doubt that FLAC files are made from original music, because of deaf-dumb-blind feelings typical to MP3's, or because turning the highest frequencies on equalizer give no effect on sound. I'm searching for a tool for a quick check of FLAC files, to simply throw away wrong files without having a long unpleasant listening. Do you know any tool which may help?
Thanks to the fact that mp3 compression has a perceptual element, mp3's exhibit certain characteristics that can exposed through visual frequency and spectral analysis. In particular, there will be a sharp roll above 16 khz. Note that in mp3's of a very high bit rate, such artifacts may not be at all obvious without an original reference file.
There is a nice run down of the wave analysis process here.
Tau Analyzer tries to automate the process but I can't vouch for how accurate it is in it's assessment.