What plugins can eliminate noise by comparing the noise to signal?

[digital media services]

Say if have something that generates some noise and hiss, but I have plenty of time before and after audio activity that plug in could scan and analyze the noise?

 

Thanks!

[mettelus]

What you want is something that can both capture and remove a "noise print." Wav editors are best to do this (often stand-alone apps), but IIRC both Audacity and ReaFIR both have some capacity for this and are free. 

[digital media services]

1 hour ago, mettelus said:

What you want is something that can both capture and remove a "noise print." Wav editors are best to do this (often stand-alone apps), but IIRC both Audacity and ReaFIR both have some capacity for this and are free. 

Ok thanks.

[charles kasler]

Possibly Izotope RX

[Alan Tubbs]

Sound forge used to have that function - capture a sample of steady state noise and strip it out.  Don’t know if the latest Magic iterations kept that function.

[mettelus]

Is interesting that searching for "audio editors with noise cancellation for PC" pops off apps specific to video conferencing. Audacity is on all of those lists and sometimes #1. For the OP, external editors can be launched from within CbB, and this thread drills down into a utility posted by scook if you want that functionality (this allows you to highlight a clip and launch an external editor for destructive editing). At the high end (also cost-wise) of the spectrum are iZotope RX, Adobe Audition, and Steinberg SpectraLayers (IIRC they all have fully functional demos if this is a one-off situation for you). Audacity is probably the most potent on the free-end of the spectrum, has been around for years, and can do some things more elegantly than some of its paid-for counterparts. Sound Forge has been a popular editor amongst this forum as well.

[azslow3]

When the noise is not changing, "by sample" removal works good. Mentioned ReaFIR is probably the best free way for CbB, with real-time spectrum and reduction level adjustment. But find good tutorial how to use it, that is not obvious.

For changing noise, payed solutions (f.e. RX)  do the job better.

In extreme cases, for example when there is background music, the voice should be separated first. F.e. with https://github.com/deezer/spleeter (free). The quality of the result is far from perfect, but better then no processing at all...