Crackling Sounds in Audio

[Jenny]

Hi.

I'm getting crackling sounds on the audio side when I capture video.
Does anyone know why this is happening? Or how I can prevent it?

The video capture is working well.


What I'm doing:
Capturing short movie clips from VHS.

How I'm capturing:
VHS --> Analog to Digital Converter --> Firewire Card (1394)

My System:
Analog to Digital Converter: Canopus ADVC-100
RAM: 448
HARD DRIVE SPACE: 20 GB (1.5 GB available)
Processor: 700 Mghz
O/S: Windows 98 (SE)
Software: Vegas Video 3.0


Let me know if anyone needs more info.
Thanks
Jenny

[Tommyknocker]

When my captured video has crackling noise in it, I load the file into Gold Wave. If the audio is off the chart in places, then I select noise reduction. This usually corrects the problem.

I have read here it is sometimes caused by recording volumes being set too high, but as a newbie, I do not know for sure.

[zillaspawn]

i get the same thing while im capturing from tape ....at first i thought it was the vcr ...so i changed the vcr 3 times....then it still did it so thanks i try lowering the volume

[Jenny]

Hi.
Thanks for the info Tommyknocker and zillaspawn.

I have read here it is sometimes caused by recording volumes being set too high, but as a newbie, I do not know for sure.

What volumes would I have to lower?


Thanks.
Jenny

[Tommyknocker]

There is a Recording Volume. Do you have XP?

[Jenny]

Hi.

I use Windows 98 (SE).
I do know which volumes you are talking about. I thought you may have been referring something else.

Thanks for the help!
Jenny

[Dragonsf]

Maybe your system is too slow for capturing.Normally I get these sort of noise, when the related frame is bad.

[zillaspawn]

my video capture looks good but still seems to get the crackeling ...but it dosent happen all the time ,i captured 3 video tapes over the weekend and two out of the three have the crackeling and the last one i did dosent...i havent messed w/ the record volume .......also i capture with a hauppage 880 card and dont have any trouble watching live tv or recording off cable,its just when i try to tape transfer ...iknow its not the vcr cause i've tryed 3 diffrent ones.. could thier be a bad spot in the tape that makes it do this???

[Sulik]

Somnetime it has to do with the chipset and soundcard (VIA+SBLive is known for that kind of problems).

There is a VIA PCI latency patch at viahardware.com, or alternatively, capturing audio at 22kHz should get rid of most of the problems (MMC should convert it to 44.1kHz automatically)

[chaseru]

I usually get crackling noises when I have videotape tracking errors. Try adjusting manual tracking on the vcr. EP tapes are notorious for this. Also if you playback a tape recorded on a different one, tracking problems can show up in the sound.

[zillaspawn]

ah!!! the picture was so good I didn't think about the tracking of the sound...the two tapes with the buzz have been taped over before the other was a brand new tape, I didn't know if this would be a problem tho....