please help. i have a problem capturing using virtual dub. if i capture from sky tv i get a great pic but distorted sound it uses very little cpu and no frames dropped. if i capture from a video recorder i get good sound but a terrible pic also uses lots of cpu and loads of dropped frames then on play back it looks like the film is on fast forward.

ive just built a new pc and didnt have this problem with sky tv on the old one (the capture card is the same) but never tried to capture from a video before so i cant compair that.

sys specs are
XP2000
512 meg ram
80 gig 7200 hard drive (DMA switched on)
the capture card is a pinnacle pctv pro
and if it helps the sound is onboard where as my old system had a sound card.