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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: voltronic on June 28, 2018, 10:16:39 PM
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This is a very clever technique for grabbing a clean noise profile for Spectral Denoise that isn't a dead silent background. Only works with a quiet audience.
https://twitter.com/TheBaronHimself/status/1012455015141654528 (https://twitter.com/TheBaronHimself/status/1012455015141654528)
Here's an @iZotopeInc RX de-noise technique:
No clear noise sample? No problem.
1) Remove notes that are ringing out at the end of the track with de-hum.
2) Sample the residual noise with de-noise.
3) Undo de-hum.
4) De-noise.
Worked super well on an acoustic jazz master I did.
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Great idea. Many thanks!
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Oh yeah, that's good.
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Cool. I've wondered about doing something like this to generate a "clean" noise sample when it's difficult to isolate one.
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Here's an @iZotopeInc RX de-noise technique:
No clear noise sample? No problem.
1) Remove notes that are ringing out at the end of the track with de-hum.
2) Sample the residual noise with de-noise.
3) Undo de-hum.
4) De-noise.
Worked super well on an acoustic jazz master I did.
....unfortunately I don't understand that (maybe english is not my first language).
I use Izotope RX7 and taped many Jazz Masters...would be interested to try this method.
Anyone who could explain this a little bit better?
@voltronic: ...The Declick module is also very handy for reducing applause sections.
Can you tell me a little bit more about the Declick module settings for doing that??
Thanks...
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Here's an @iZotopeInc RX de-noise technique:
No clear noise sample? No problem.
1) Remove notes that are ringing out at the end of the track with de-hum.
2) Sample the residual noise with de-noise.
3) Undo de-hum.
4) De-noise.
Worked super well on an acoustic jazz master I did.
....unfortunately I don't understand that (maybe english is not my first language).
I use Izotope RX7 and taped many Jazz Masters...would be interested to try this method.
Anyone who could explain this a little bit better?
@voltronic: ...The Declick module is also very handy for reducing applause sections.
Can you tell me a little bit more about the Declick module settings for doing that??
Thanks...
This procedure is only if you can't find a long enough section of "clean" background noise to load into the Spectral Denoise module.
Find a place in your recording where the background is quiet with no audience noise, but there the tail end of a note / chord being sustained. Look for straight, flat horizontal lines in the spectrum. Use the de-hum module on that section to remove those sustained notes, leaving just the background behind. That clean background is what you can now use as a noise profile for the Spectral Denoise module, by highlighting that section, opening Spectral Denoise, and clicking Learn.
NOTE: I have learned the hard way that once you find a clean noise profile, you should export it as a separate file in case the program crashes while you are working and you lose it. I HIGHLY recommend doing this.
Once your noise profile is "Learned", you Undo back to the point before you used the De-Hum module to remove those tails of notes. Then you run Spectral Denoise. My starting point settings for RX6 are the Maximum Quality preset, and the Amount set to 6.
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As far as Declick, I usually just highlight a section of clapping and use the Vinyl Record preset, sometimes tweaking a couple settings, but often leaving it as-is. I usually use Declick on sections of full audience applause between songs to lower those peaks down so I can raise the overall level of the entire concert. For intermittent random claps or other sudden peaks during the music, I use a soft limiter on just the offending noises.
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NOTE: I have learned the hard way that once you find a clean noise profile, you should export it as a separate file in case the program crashes while you are working and you lose it. I HIGHLY recommend doing this.
I like that idea as a basic archiving move too, then someone in the future has something to go on to know what you used.
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NOTE: I have learned the hard way that once you find a clean noise profile, you should export it as a separate file in case the program crashes while you are working and you lose it. I HIGHLY recommend doing this.
I like that idea as a basic archiving move too, then someone in the future has something to go on to know what you used.
I never thought of it that way, but great point. Besides not losing your noise sample, the other reason I do this is in case I find later on in the post process that I was over-zealous in my amount of noise reduction, I can just go back to the non-RX generation, apply the noise profile, and go with a different setting.