Humming sound during live-tv/tv-recordings

[Dan.]

There is still humming when i perform recording and nothing is attached to the card

[stustunz]

ok at least we know its something to do with the card
but the problem is you cant get any other drivers to try

have you got another pc you can stick the card in

im out of ideas
bad card maybe can you return it

only other thing is what else is near the computer
do you have a fridge on the same circuit in your house unplug things see if the sound changes
select watch live tv and try moving things around turn things on and off see if the hum changes

[stustunz]

this is the sort of thing that can cause a hum aswell
just did a quick search its easier than trying to explain what im talking about
http://www.channld.com/hum.html

[Dan.]

First of all, thanks for trying to help.

I relocated the computer to a different part of the house, didn't attach it to any other component to prevent the groundloop effect. and there is still a hum.

Downloaded from avermedia website the driver for M113 (which is very similar to mine, GB-PVR recognises my device as the M113) and installed it.
It comes with its own capture video software. everything works, but still get the hum using the avermedia software as well.

I'm still waiting for their support's reply.
Lesson learned - next time go with mainstream, in this case pvr150

[sub]

It comes with its own capture video software. everything works, but still get the hum using the avermedia software as well.

I suspected that would be the case. Thanks for the confirmation.

[Dan.]

I contacted our local distributer, he said that it's 99.9% some kind of interference between the capture card audio drivers and the soundcard audio drivers.
I uninstalled both, updated the mobo sound card to the latest one, and still no improvement.
I installed the card on a different computer with a creative audigy soundcard, and again no improvement.
At all these cases the computer is conected to nothing but a set of headphones to eliminate any groundloops and interference, i even took out all other cards such as pci ethernet and video cards. I tried conacting it to different pci slots, and pluging the pc to diferent power outlets.
Any last thoughts before moving to pvr150?

[stustunz]

i cant beleive that as the card does its own encoding within the card it doesnt use the sound card to do the recording and you said it only happens oin things recorded on that card
take it back to the shop and tell them to check it they willl charge $50(or what ever) if there is a fault its there probelme(free) if it costs you $50 you know its your pc be able to fix it (i dont think it will be your pc)

[Ted the Penguin]

extra tuners are always good :p

unless you can get a RMA or something to return the card and get a working replacment, then I would just suggest getting a PVR150 (they can be had for $60ish last time I checked)

anyways, good luck, it always sucks trying to figure those things out

[Dan.]

update- took the pc to the shop. We replaced the Avermedia to a new one, but still no good.
Finally I installed the pvr150 - no more humming

Now, after watching them both in action, I think that the picture coming from the Avermedia is sharper and nicer (but not significant), it's also smaller and cooler, so I kept it - maybe the release of a new driver or upgrading to Vista will solve this issue.

Thanks for the support

[gavilan]

Definitely a grounding problem. Make sure the outlets that the equipment is connected to are properly grounded, an easy way to do this is with a cheap $15-20 surge protector that has ground status lights on it. As a last resort you may try a power strip that has EMI filtering (most power strips made for home theater systems have it)

EDIT: glad you got it resolved