Please read and help if you can, this is a weird one!!

[CommanderXJL]

When I capture with virtual dub or VideoStudio, I get some popping sounds in the audio, no matter what my settings. If I use a different program to capture I still get it. I am using an ATI 7500 card. If I bypass the card for sound and hook the sound directly into my Soundblaster card I still get the crackling and popping sounds ( I was sure this would fix it!) Now, here is the weird part. If I capture just the audio into Soundforge through my Soundblaster card the sound is perfect!! Now, I don't want to have to capture the video and sound seperate because then I have to put the audio and video back in sync when I author the DVD in Maestro. Why is it I can capture the sound perfect in Soundforge but not Virtual Dub or Ulead VideoStudio? What are these programs doing where the sound is getting recorded with little popping sounds?

[macleod]

sounds like an IRQ conflict to me. Go to your windows settings and see if there are any conflicts. An (almost) easier way to tell are if the popping noises are evenly spaced. That usually means there is a conflict.

[BJ_M]

yep i agree with macleod - though in todays systems with everything sharing , about the only solution in many cases is to swap the cards around ..

[CommanderXJL]

Can you tell me more about how to fix this IRQ problem? I don't even know what IRQ is, thanks! The static sounding popping sounds are almost like if you recorded a record into your computer, so I don't know if this counts as evenly spaced, it isn't a popping sound that is at the same time interval and sounds the same, it sounds more like an LP sounds, with poping and static

[BJ_M]

well a lot depends on what system and os you are using .. a lot of times if you remove or move either your network card and/or audio card to a different pci slot it will fix the problem ... if you are still using a system with a non pci sound card - you can fix it (maybe) in the bios ..

How do I fix an IRQ conflict?

You can fix an IRQ conflict in one of two ways. Place the audio card in a different PCI slot. If that does not work, you will have to enter the motherboard BIOS and manually assign an IRQ to the PCI slot you audio card is pluged in to (if its possable).

http://www.pcaudiolabs.com/setup_tips/ has very good advice ....

if fact this guide found there might be good to reprint here in guides ..

[CommanderXJL]

I'll try moving my sound card. But why can I capture sound without changing anything if I capture into Soundforge? Why do i only have this trouble capturing in virtualdub?

[CommanderXJL]

OK, my ATI card and Soundcard were sharing the same IRQ number, I moved the soundcard now they have different IRQ numbers, but it didn't fix it. Is there anything else I can try?

[neonflx]

Could you be more specific as what type of system. i.e. OS, chipset,etc.
For example there are thousands of threads refering to XP, VIA Chipsets and crackling sound when Creative Soundblaster and Audigy are use. Maybe this is not your case but knowing what hardware you have would help troubleshoot your problem.

[CommanderXJL]

I have an Asus Motherboard, Athlon XP 1800, Windows XP, VIA KT266A Chipset

[neonflx]

I take it you also have a soundblaster the following is an example of people complaining about the same thing, it could affect many aspects of your sound function.

"When you play OFP, do you hear an extremely annoying crackling or static-like sound? So do many players. Some folks get it in other games, too. Is it an OFP bug? A Creative Labs Sound Blaster glitch? A DirectX sound API snaffu? It's been talked about quite a lot on the OFP forums.

In the summer of 2002, one major motherboard manufacturer, Abit, admitted that this error is occurring on its motherboards that use the Via chipset (wouldn't you know it!). So far, Abit's recommended solutions include altering BIOS settings as well as installing 3rd party corrective patches. I can't keep up with such details. So please check with your motherboard's manufacturer or scan the WEB for discussion on how to modify your VIA chipset based system to resolve this problem."

And they are not alone an increasily amount of complaints with people haveing such combinations of hardware had flourish throught out the net, do some homework and see what you come up with.

[Nelson37]

Are the sample rate and bitrate settings in SoundForge EXACTLY the same as when capturing with Video?

Just as an experiment, try a SoundForge Audio cap at the same time as Video is being captured. Also, try changing sample and/or bitrate with the ATI card.

If it is an IRQ problem, it should show up all the time. Possible it is with portion of ATI card which is only active when capturing.

Try putting the sound card in the slot physically farthest from the ATI card, also try the slot immediately next to it.

[BJ_M]

Athlon, XP, VIA and Audigy = kiss of death for some systems ..

[Bondiablo]

As a last resort you could try getting a different sound card. The Turtle Beach Santa Cruz is a great card and I've never seen anyone complain about problems with it.

[neonflx]

I could not agree with bondiablo more!
I, myself switched to the Santa Cruz Turtle Beach and has had no problems since, I know is not probably what you want to hear but, Compaq/Hp released a 300 meg fix for this problem i used to have it and deleted it but it cured some of my issues and is one of the current recomended fixes for it, once again do a search and see what you come up with, i'll try and look for it.

[CommanderXJL]

But like I say, why does it only happen when capturing and not if I just record sound into Soundforge? It is the same bitrate and everything. Why do I only get it when capturing? I bypass my ATI card completely when capturing and the noise is still there

[neonflx]

It might has nothing to do with your ATI card, I do not have your system, I just pointing out the issues that some people are having with some hardware, importing audio into soundforge might not require the same proccessing power or it may required less, anyway its no tellling as far as why?, I just pointing out some of the issues with the hardware.

[CommanderXJL]

I guess if I can't figure it out or I can't find someone who has had this problem before I might try getting a new sound card

[Nelson37]

Another idea. While capturing, LISTEN to the HD activity and also to the pops in the sound stream. Any Correlation? I have had some cases of hard drive activity bleeding back into the sound stream, sometimes fix is as simple as changing power connector on the hard drive, or a new power supply. Changing Hard Drive has always fixed this issue when found, changing Sound Card sometimes but not always works.

Can you cap audio with Soundforge while capturing video, or do you get an error? Have you tried re-arranging cards as suggested? It's easy and well worth a shot.

[neonflx]

It does not mean that you have to get a new sound card, toguht that is probably what you end up doing, however you should do some research as there are many threads that talk about the crackling sound when using a crative labs sound blaster, don't just expect for someone to give you the answer here, do your part and read and figure out what needs to be done, I changed my sound card but after the fact I did some research and find out some alternatives that might work.

[CommanderXJL]

OK, so I've removed every PCI card I have except the ATI 7500 and the Soundblaster, I still get the damn static popping sound, I've done all the research I want to on this problem, so what now buy a new sound card?

[BJ_M]

or new motherboard

[Dr_Layne]

When I capture with virtual dub or VideoStudio, I get some popping sounds in the audio, no matter what my settings. If I use a different program to capture I still get it. I am using an ATI 7500 card. If I bypass the card for sound and hook the sound directly into my Soundblaster card I still get the crackling and popping sounds ( I was sure this would fix it!) Now, here is the weird part. If I capture just the audio into Soundforge through my Soundblaster card the sound is perfect!! Now, I don't want to have to capture the video and sound seperate because then I have to put the audio and video back in sync when I author the DVD in Maestro. Why is it I can capture the sound perfect in Soundforge but not Virtual Dub or Ulead VideoStudio? What are these programs doing where the sound is getting recorded with little popping sounds?

I am having the same problem and came here looking for help. I'm using an ASUS A7V266-C with Audigy-2 Platinum and AIW 8500DV, Only get clicks with video capture. Weather I go straight thru the sound card or thru the video card and into the sound card. My Video and sound share the same IRQ so I will try moving the sound card to a different slot and see what happens.