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.
---
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.