[Five]

Originally Posted by wazoo2u

I spent a fair amount of time yesterday looking more closely at this problem. The horizontal scan frequency (15,735) is only going to show up if the material was recorded with a microphone, not a line feed because it's an externally produced artifact, and not included in the broadcast signal. The FM pilot used in both radio & TV is 19kHz and the red line is below that frequency.

Working with CEP, I see that you must have a steady tone to produce this amount of spectral energy. Simply making a filter and boosting the frequency only amplifys already existing frequencies.

I can't match up this frequency with any parameters I know about (not saying too much) Anyone have other ideas ?? Could it be an artifact from some sort of Codec processing ?

It has something to do with TV. Try hooking your VCR up to your soundcard, what do you see? A red stripe. If you don't, try again with a cheaper soundcard and a cheaper VCR.