what do you recommend?? EAC??
After spectral analysis you can encode one track in mp3 (e.g. 160/192kbps):If you ear severe artifacts there's a better probability that CD was mp3 sourced.
Heh, I came across a method quite by surprise... plug in some headphones, and unplug them slowly, until you hear a warble. Depending on the type of warble you hear, you can quite often discern between mp3's and normal uncompressed audio.Ruairi
I found out that you can reproduce it if you mix stereo down to mono with one channel inversed (like some simple karaoke/vocal removal tools/plugins do). Especially where the vocals had been before you hear severe artifacts, no matter if the source is a wav decoded from mp3 or vorbis. (Haven't tried so far, but I expect this to happen with all lossy codecs.)
Question: does encoding in Stereo (rather than Joint Stereo) affect this "artifact"?
any original disc always reaches fully 22050Hz without cutting the 20+Khz area.
The 19 kHz line definitely smells like a pilot tone to me. Pilot tones are usually used for transmitting purposes....Some background information