Upside Down Noise Gate

I got myself in trouble claiming there was a tool that does this:

We know there is a "Noise Gate" that takes all sounds below a certain level (settable) and dumps it all the way to zero. This will give you a silky quiet background where there used to be rumbly room noise. It also has problems, but OK.

What I want is a tool that takes all sounds *above* a certain level and dumpts them to zero.

Say for example, I have an annoying popping sound I want to suppress. The popping sound is intermittant and it's louder than the show. Every time a pop goes by, it triggers the gate and drops to zero.

I can think it's possible to use the real Noise Gate to isolate the pops and then digitally subtract them from the track.......

Koz

This sounds like a job for Adobe Audition. But I don't know how that integrates with FCP at all. The demo at NAB where they used a spectrograph to find the offending sound, and use a lasso tool like in photoshop to remove JUST THAT SOUND, but leave everything else intact...was impressive.

Could you maybe use the High Shelf Filter for that?

Andy

Soundtrack Pro has a pop removal filter. If you don't want to use that, Soundsoap has the same feature within FCP.

I've never heard a better Noise Reduction filter than Sonic Foundry (Now Sony) Noise Reduction 1.

Zoom in on the waveform where you hear and see a pop. Zoom way in. Select just the pop on the waveform and set your noiseprint. Now select the entire waveform and run the filter. It checks sonically, mathematically, and visually for the same pop and removes them, leaving the original sound in tact.



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<<<Soundtrack Pro has a pop removal filter.>>>

Silly me. I didn't look there.

<<<This sounds like a job for Adobe Audition.>>>

Which I own. I don't remember why I don't have it loaded anywhere. It's the spiffy version of Cool Edit 2000 which I also own--and use. I suspect there is a newer Audition than the one I own and the reason I don't know that is I didn't load the first one.

Oh, well.

OK, SoundTrack Pro.

Koz

<<<Could you maybe use the High Shelf Filter for that?>>>

I've never used that particular tool, but in olden days, a shelving filter was a requency response tool. I'm on serious shaky ground here.

Koz

> Could you maybe use the High Shelf Filter for that?

I'm pretty sure Shelf and Pass filters target frequency ranges, not volume levels. I think Koz is talking about eliminating a certain sound that is above a certain loudness, not a certain sound above a frequency.

Oops, I misunderstood what you were looking for. I thought you were looking for something in a high frequency range to get rid of. I should just read more carefully.

Andy

A Compressor / Limiter I believe is what you might want but the pop removal in Sound track should work better.

Koz:

Depending on the kind of pop it is, you may be able to use the sidechain feature of some compressor plug-ins to pull the level down of only the offending frequencies, in effect, auto-ducking as you would a DJ VO over background music. Or a restaurant host/ess:
"Koz, party of seventeen, Koz!"

tc