I'm trying to use an ATI AIW128 to capture off of an NTSC cable source. When I capture using VirtualDub, the audio is almost immediately and badly out of synch. Capturing using high bitrate MPEG2 I-frame-only also has audio sync problems to a lesser extent. The oddest part is that capturing from a VCR and a Camcorder didn't cause any problems (using composite or S-video)! Anyone know why capturing through the TV tuner would be different?