High pitch beep in Mpeg2 Captures

Hi, there is no specific capture forum for my problem, so I thought I’d post here…

The problem is Im using an ATI TV Wonder to capture tv in mpeg-2, but I am always getting some kind of intereference in my resulting videos. The sound is routed from the out of my tv card to the line in of my sound card. It is a high pitch sound that is very noticable during silent parts… Its more of beep than a hum.

I have tried moving away my UPS and power supply cables, but no lock…

Any info that could lead me in the right direction would be great. thanx

What frequency is the beep?

If it is around 15…16 kHz, it is the line frequency of the tv (and your ears are not too bad :iagree: )