Noise Removal - Stereo Mic'ing

[johnzo]

I've just got my 2 mics setup for recording and have been fiddling around with it.

Now i'm trying to apply noise reduction on the track and it doesn't seem to be working to well. Would that be because i'm using a bad 'sample'.

Or should i be splitting the left and right into separate tracks and remove noise from them individually?

Which is the best way?

 

[dobro]

You should sample a portion of the track where there's no music playing. It's the silent segments you need to sample, cuz that's got the noise you *don't* want. After you sample and save that quiet segment, then re-open the whole track and apply your saved sample to the track. It'll be quieter.

 

[Mortonman]

Occasionally, when I get a noise "profile" from the "silent" part of the track, I get sort of a "warbling" effect when I apply it to the entire track. I don't get the effect in the louder portions of the song, but only when it softens down, especially at the end.

Is there some way to do away with this "warbling"? I guess it's some kind of artificially generated artifact. Should I consider using only a reduced percent of the effect? If so, how much reduction?

 

[Blue Bear Sound]

That warbling is an artifact of the process... how bad it depends depends on how much you're trying to remove, and the context of the audio waveform in question. (ie - it will work better some times and not others....)

The solution is not to let the noise get there in the first place, because after that, as you can see - rescue operations often result in compromised audio quality.

 

[gasal69]

One by one

Would it help to separate noise reduction by channels?
Do same method like dobro tells you but first for one channel by highlighting only right side of the track.
And after that you do the same for left channel.
I was thinking that the noise was exact the same on both canals and when you do noise reduction for left, the right channel stays untouched.
I tried this but, honestly, I did not hear much different results.
Maybe I would if noise was loud but the noise I’m talking about is some sounds which came from outside of my house.
I do all recording in my living room and there is no way to isolate those sounds.
This is home recording forum and I wouldn’t be ashamed for this living room recording. Or, would I?

 

[ozpeter]

Noise reduction is intended for steady noises like computer drive and fan noise, air conditioning, distant and constant traffic rumble - that kind of thing. Sounds of dogs barking next door are not candidates for removal!

Generally, don't push your luck too far with the settings - aim for 10 or 15dB of reduction and have the slider around 70 or 80. Use the frequency graph envelope control to target the reduction at the offending frequencies, particularly if rumble is involved. Or you can be more surgical using the spectral view and the 'frequency space editing' of Audition 1.5.