Strange crackle problem

Nat wrote on 1/13/2003, 4:14 PM
Hello.
I recorded a band using 4 tracks, all went well.
Now I want to had another track, and each time I hit the record arm button on the new track and I play back, I hear some crackling. I find it strange since I can playback several tracks with effects without a glitch.
I'm on a 850 Thunderbird with 512 megs of ram using a Wamirack192L. Thanks.

Comments

Geoff_Wood wrote on 1/13/2003, 10:35 PM
Can you *see* interference on he recorded waveforms (ie is it a glitch in recording, or just playback)?

Haveyou done all the standard tweaks to set up your PC for audio work ? What OS ?

geoff
Nat wrote on 1/14/2003, 12:02 AM
Windows XP SP1.
I tweaked all pretty much to optomize for audio.
The glitch is only on playback, the recording isn't affected. (I can record 4 tracks at the same time with no sync problems or glitch at all).

That's why I find it strange that arming a new tracks makes the playback crackle. If I de-arm the track all is back to normal.

I also tried playing with latency settings of both my card and vegas, nothing to do even at higher latencies.

I tried disabling all plugins and it seems to help, but i can still hear crackles.
Also my cpu meter is not at 100 %, only 60 with effects...
Last thing, my soundcard shares the same IRQ than my USB controller, so I disabled the controller to see if that could be the problem but I still got some crackles...
Thanks for helping,

Nat
Geoff_Wood wrote on 1/14/2003, 3:11 AM
60% !!! What effects - must have something pretty hefty on there. I can play backmore than 20 tracks with a handful of plugs, on and not get that high. (Celeron 1G1).

I'd say something in yur system is sucking too much gas. What does CTRL-ALT-DEL show as running ? Also recommend TaskInfo 2003 (websearch should find it) for a comprehensive breakdown of what apps/processes/etc are sucking exactly how much resources.

geoff
Nat wrote on 1/14/2003, 10:04 AM
As for effects, I had some renaissance Rverb, Rcomp and L1 Ultra maximizer.
If I disable all of the effects my comp is at about 40 %.
That's strange since I don't have any other app running in the background (apart from NAV) and have no spyware or programs I am unaware of running in the background....
Geoff_Wood wrote on 1/14/2003, 3:27 PM
You mentioned 4 tracks ? 60% is waaaay too high. You have a problem somewhere. What is the cpu% before playback ?

geoff
Nat wrote on 1/14/2003, 4:35 PM
If I only load up my project and nothing is playing, the cpu is at a 20 % average.
If I hit play it is at 50%.
If I add a track and arm it, it jumps from 20 % to 35%
Now if I playback with the track armed I get 70 % load.

I tried in Cubase to do the same thing and I could playback way more tracks with no glitches... Pretty strange.
When Vegas is closed, with one ie windows open the load is at 20 % also. The process taking the most ressources is svchost with around 10 %
Geoff_Wood wrote on 1/15/2003, 2:40 PM
My lower end system:
VV3/Cel533/98SE
VV3 Idle 4.2%
play 1 track 10%
arm track 13%
pb with armed track 20%

With my Celeron 1G1 these figures are all *much* less. I'd say you have either a corrupted Vegas install, something broken in Windows, a broken or incompatible driver. From the 'system idle' % I'd say the 'broken windows' was the most likely. My Cel533 idles at 1.1% .

geoff