| How can test cdr are from original or are a mp3-fake ? |
| Analizing Spectrum Frequencies |
| Frequencies Up to 16.5HZ are inaudible for human ear. |
| Mp3 cuts this frequencies and also modify low freq. Also depending of Mp3 encoder change. |
| Some CDr an original CDs Frequencies goes up 20hz. This albums are easy to compare. |
| But some CDr hasn't frequencies up to 16.5hz because are inaudible. Only can be sure is CDr comparing with Original CD frequencies |
| I used Cool Edit Pro 2.0 tool in this examples. Spectral view. |
| Part 1: |
| CD-Audio with frequencies Up to 20hz+ |
| Test: Blinded By Love (SB). CDr Copied from Original CD. Has lots freq up to 20+ |
|
| Blinded By Love (SB). Mp3. Freq Cuted up to 16+ |
|
| Blinded By Love CD-AUDIO Spectrum Zoomed |
|
| Blinded By Love MP3 Spectrum Zoomed. Freq Cuted up to 16+ |
|
| Part 2: |
| CD-Audio with no frequencies at 16.5+- |
| Test: The Storm At Longchamps (VGP-077) Original CD. |
|
| Test: The Storm At Longchamps (VGP-077) Original CD. Zoomed |
|
| This type of Bootleg are hard to diference with MP3, only comparing spectrum of original CD |