Comments

B.Verlik wrote on 5/12/2005, 3:11 PM
some info would come in handy here. Are you using an extension mic with your camcorder? (most likely cause, short in cable or plug).
Are you capturing your video and audio through video and audio cards separately? (again, probably shorted cables or A.C. 120v line too close to unshielded audio cables )
If capturing from firewire/1394 cable, try different cable, as firewire cables develop shorts easily.
Do you hear the hum if the camera is plugged directly into the TV? If you do, your camera or extension mic is the problem.
You shouldn't get any hum, unless you record it on purpose.
farss wrote on 5/12/2005, 4:52 PM
How did you use the Noise Reduction tool?
It works pretty damn well for me but it's WAY easier to use in Sound Forger than Vegas.
For simple noise problems I at times take a differnt approach. Open the offending audio in SF, find a quiet part that has just the noise (no need to be too careful doing it this way). High that area and open the Spectrum Analyser. You should be able to identify the offending frequecy. Then use a deep notch filter on the whole track to get rid of it. This avoids the problem of having NR filtering out stuff you need to keep. To make certain you've hit the right frequency you can check several samples, when you find one frequency that shows up everywhere you can be pretty certain that's the culprit(s).

Of couse if the problem noise contains many frquencies then you're in serious trouble no matter what you use or how you do it.

Now what'd be really nice is a way to use the Sony Oxford NR tool in SF or Vegas, this beast is way smarter than the old SoFo NR2. Once you tell it what you don't want even if it shifts in pitch this tool will track it and remove it, very powerful, very expensive and I think it'll only run on ProTools.
Bob.
DGrob wrote on 5/12/2005, 4:59 PM
I'm reading a couple of assumptions into your post. If you're using "Dynamic Noise Reduction" in the Event Video FX, you're talking about visual noise rather than audio noise reduction. Sony Noise Reduction 2.0 is availabe (at some cost) as an audio plug-in. Spot's VASST site has a great tutorial here:
VASST Noise Reduction

I went with the NR2.0 and have not regretted it. The quieter the scene, the more likely you'll pick up a little internal going's on noise. It's really effective when used properly.

HTH, Darryl
riredale wrote on 5/12/2005, 11:12 PM
I suspect the humming sound you refer to is not AC 60Hz hum, but rather the hum from the spinning head drum inside the camcorder. If so, the best way to get rid of it is by using a separate mic when recording, either separated physically or acoustically isolated on the camera with some sort of shock mount. It's possible the mic would still pick up some noise from the drum, but in my experience the hum delivered through the camera body is always more than the hum coming through the air.