Horizontal lines in video caused by loud audio

[lbblock]

I am capturing and burning with Ulead Video Studio 7 in MPG2 with mpa and burning to DVD without the need to render.

I have noticed that I am getting horizontal noise lines in the video during loud audio passages. The record level is not peaking at all in the red but could that still be too much and be the cause? I tried lowering it substantially but it made no difference.

Why is this happening and why does the audio affect the video?

Thanks.

I don't think it matters but I am capturing at 352x480, VBR 4500, Field B, 80% quality, mpa.


(I posted this once but it did not show up on the forum, sorry if it double posts)

[lynza]

You obviously have problem, which dumbed me for starter...

It's grounding mate...
You should have to try using expensive high quality cables,
ground your equipment propertly,
or, as helped in my case, DO NOT connect sound L and R grounds ! Connect only inner pin (signal) but keep outer ring of RCA out of slot (if your wires allow). Try it !

Basically it's difference between grounds of your equipment - it can be up to 70 volts difference between ground of your PC and your i.e. VHS,Sat,PVR etc...
That causes these horizontal lines..

That's it !

Hope i helped.