Wierd effect with noise reduction

[hawk]

Anyone notice a wierd, phaser-like sound after you've applied noise reduction? AllI do is take a selection of the noise in the track and save it. Then apply that profile to the entire track. But, in the background you can hear this wierd sound (mainly just with headphones.) What am I doing wrong?

[Havoc]

You are over-doing it. It is one of the possible artefacts with NR. If you apply it to hard, then it can happen. Just apply a less reduction untill the effect goes away.

[hawk]

Originally Posted by Havoc

You are over-doing it. It is one of the possible artefacts with NR. If you apply it to hard, then it can happen. Just apply a less reduction untill the effect goes away.

Which level do I decrease? There is an overall slider bar then below it there is another level where you manually put in a value in dB. Thanks.

[Havoc]

Well, you can use both, but they have a different effect. So you have to try! NR is very effective, but it depends on a lot of factors. So just using the defaults can one day give excellent results, the other day be just unusable. There is no way of telling you what will be the most effective setting without the artefacts. Sorry, but it is a lot of trial and error.

[lpdeluxe]

The noise reduction samples the noise you have selected and then, if you have it set on 100%, it removes all frequency components that match the noise from your track. This often means that you lose part of the guitar tone, or the vocal, or whatever. There is a "%" slider that should be a good place to start. Try moving it down from the maximum until you have a balance between losing the noise and losing the music.

As Havoc said, it's trial and error.

[hawk]

I'll give it a try. I was just confused that there were 2 things to adjust that seemed to do the same thing. I guess I'm not understanding the difference in what they do. The Help is pretty vague about it.

[hawk]

I did some experimenting last night. What I did is get a small section of noise (mostly computer fan/hard drive noise,) and played with both settings to find out what they did. I found that if you DECREASED the noise reduction amount (the slider bar,) it INCREASED the warbly effect. So for me, it worked best to have it at 100%. The other setting seemed to adjust the overall volume of the "corrected" sound. I found the default of 40dB too much and decreased it to about 32. This kept the overall level about the same as the original noise and without any warbling sound.

By the way, is there any reason to use Hiss Reduction over Noise Reduction?

[lpdeluxe]

Hiss Reduction is optimized for tape hiss, and targets the specific frequencies that tape generates. When transferring tapes, I prefer to sample the hiss and run it through the noise reduction, since that will kill the noise specific to my tapes, rather some generic expectation.

[hawk]

LP, where in East Texas you from? I have some relatives there, near the town of Mineola.

[lpdeluxe]

Mineola is quite a ways North of here. I'm about 1/2 way between Dallas and Houston, but actually closer to Shreveport than either. I'm further South from I-20 than Mineola is North of it. Hwy 69, which runs through it, is about 20 mi W of here.

[hawk]

Ah, I know where that is - been camping a few times in that area. That is some beautiful country. I love the Piney Woods.

[Mortonman]

Hey, guys.

I live in Mineola, New York. It's on Long Island. Who woulda' thunk that Cool Edit was used in towns with such an unusual name. Mineola was the daughter of Chief Sewanhaka -- from an indian tribe that originally lived here.