Agreed. To clarify: Spot means small chunks SEVERAL TIMES after one another. Remember to take a new sample each time.
Tor

To clarify further, having just done this myself.
Use small samples and set the noise reduction to give a small amount of attentuation. Repeat the process several times. You do need to find a clean noise sample, if there's anything else in the sample you'll have major problems.
After each pass have a good long listen, if you hear any artifacting it's quite likely you've taken a sample with more than the noise in it.
Now things like motor noise due to worn out bits will have several components as well, some with a high repetition rate and some with a low repetition rate so also use samples from different parts of the clean noise.
One thing I did find is you need to think of the sample size in terms of the number of cycles in the sample. If you're trying to get rid of a HF noise then 1mS is plenty of samples, if it's LF though you might need 100mS of sample.
Should I add that all of this fine fiddling about is WAY easier in SF.
Bob.

2 questions:
1) How much is small chunks....say 6 db at a time, or less?
2) Using SF6, I usually select about 1 second (if possible) of the unwanted noise, could this be too much for some reason Bob?
Anybody up for a turkey sandwich yet....eeeww, I just made myself nauscious!
TIA,
Randy

Great Guys - thanks for the tip. I'm once I download the demo, I'll be back on here asking how just how to do it all - :)

Thanks and Happy Thanksgiving

Marc

Depends on the sample, but one second is WAY too much. Look more in 100ths of seconds. Sometimes you can pull as much as -50dB, but that's rare. I've *occasionally* been known to pull a full 100dB, but that's exceptionally rare.
Use the invert to hear what you're pulling. If you hear anything that resembles good audio, back the amount of reduction off.

I bit the bullet and threw down the 279.00 for this software, and I have to say - it might be the best investment I've made. This program is amazing in it's efficiency and throughness. It saved this porject.

Thanks for the advice/tips

Marc

Again depending on the noise you MAY find 100ths of second to be too short. I'd imagine the first thing it does to build the noise 'profile' is run it through spectrum analysis and if it's say 60/180Hz hum then you need at least a few cycles for the spectrum analysis to build a good profile.
Which brings me to another point. Depending on the noise I can get better results by NOT using NR2! Using SF7 I take a suitable sample and look at it using spectrum analysis then just use a notch filter. Now this will work even if you cannot get a good clean sample if it's only a few frequencies involved. Advantage of this method is much less risk of aliasing problems and I can use a very deep and narrow notch.
You do need to know what you're looking at but using a bit of grey matter is sometimes better than click and pray.
Bob.

Having some problems- The first pass reduced the noise some, but for some reason, I cannot get another noiseprint to continue the process. I was told to make several passes at it - Also I do not have an audio editor, just Vegas 5.0 and the Noise reduction plug-in. Any help or tutorial would be much appreciated.

It appears to me (a relative Newbie) that I cannot get a small enough "chunk" in Vegas to sample just the noise. Is there a more precise method of getting into milliseconds besides clicking all the way out on the bar to the smallest selection available. Thanks and again sorry - kind of new at all this.

I've only done this in Sound Forge so I may not be of much help!
I think you would need to highlight a small section on the TL, somewhere where you think there's only noise then open the FX, tick Capture Noise Print, Stop and then the NR plug will be apllied to the whole TL.
Don't know if that help or not.
What goes worng when you try to repeat the process you used for the first pass?
I'm guess once NR2 has it's noiseprint maybe in Vegas you need to take it out of the FX chain and put it back in to get it to capture a new noise print?

How long is your problem clip?

If the audio is under 5MBytes you could email it to me and I'll fix it for you, it is Thanksgiving over there isn't it? Even if you rip the audio to say 160Kb MP3 it will not suffer much.

Bob.

Hey farss - thanks for your help. The "problem noise" turned out to be a defect in the tape transport on the new Pansonic GS400, which has since been replaced, but I have a ton of footage where this motor grinding noise is prevalent (and loud) throughout. I was able to make several passes now, but still cannot get rid of it completely without distorting the good audio. Maybe I just have to play and learn the program more? Anyway, I'd be happy to send you the audio file if you want to play with it...

Thanks
Marc

From what you're describing I seriously doubtyou'll get rid of it completely, You'll get it a lot better and that's about the best you can do.
Problems arise with noise that's in the same part of the spectrum as want to keep. Sure NR2 can attenuate those frequencies but there's so many of them. You end up witha response that;s full of holes and worse still at the edges of those sharp filters are big phase shifts, hence you start to get artifacts, in fact these are the same as what is intoduced deliberatley with phasing effects.

You can email me a bit of it to have a go with SF7 and NR2, I'm at
farssAToptusnetDOTcomDOTau
Keep attachments under say 3 MB, isp says 5 is OK but never seems to work out over 3.
might not get back to you until tomorrow as I'm in the mddle of a long encode.
Bob.

. . A Grazie sideways thought here . .try using Click and Crackle reduction. This is used for improving scratched and Ale endowed copies of Black Sabbath and Motorhead - yeah ok, how would I know - Vinyl platters. This repeating "crack" or pop sounds like a good candidate for "removal" by this type of repair - yeah?

Grazie

yeah . yah wanna give me a tiny clip? 'ere yah goes . .. grahamUNDERSCOREbernardATlycosDOTcoDOTuk

Grazie

Good thought, I've used that tool on vinyl recently but it's very specific about what it'll remove. In the end I also did a lot of hand repairing in SF. That was when I learned why SF is a bit different to Vegas in how it works, you can do a lot of microsurgery very quickly.
I think it does a better job on clicks to than plops, sure worth a try.
Problem I see is these tools are much easier to use in SF, guess I was lucky, I got SF7 and all the tools for the price of the tools.
The spectrum analysis in SF is a great tool too, really handy now I'm getting more used to using it, taken a while though.
Bob.

Yes, SF is a bit Brain Cell hungry. But once you've got the hang of it, it reveals all! . . And yes it again deals wioth Media in a way quite differently to Vegas .. The micro surgery IS splendid. I did a piece of "crucial" recovery for a well expereniced cameraman. He'd not got the stage audio from a promised auditorium style deck. All he had was a meek single house mic. and his camera rumbling mic. I pulled all this off within SF and got the finals back to home and onto his client. I got paid nearly double and the clients had a piece which they will cherish .. ah bless!

Grazie


ps the FX is still downloading. . . duuuaoh . . boring . ..