The filters I'm using are - equaliser, compressor, normalise.
Equalising first (at the top?) allows me to get rid of most of the hiss, while excluding normalise brings down the dynamic range.
By the way - capturing 6hrs mpeg2 with MSP8 and my Funtv card results in zero audio sync problems. Unlike when using Cyberlink's PowerVCR. Of course I have to give up on scheduled recording
