Stop sounds in specific range

I've got several clips that has a continuous noise in the background that I want to remove. It's in a narrow range, around 7500 Hz. I've tried the equalizer in the clip inspector but even at -70 it's still noticeable, and it effects the rest of the sound quite a lot. Also tried the noise reduction in fairlight.

Is there anyway to completley block all sound above a specific frequency or within a range?

Very much source dependent on the restoration process to follow.

Can you include a link to a sample of the source media?

I've used the Spectral View in Adobe Audition to handle situations like this. Works very well.

Unfortunately, Fairlight doesn't yet have this capability.

viewtopic.php?f=33&t=106559&p=1002055&hilit=spectral#p1002055

Dialogue Isolate might help if you're trying to suppress the background sounds and enhance the people speaking.

In addition to the free Dialogue Isolating tools in Resolve, there are others you can pay for as 3rd-party plug-ins. Accentize, Acon Digital, iZotope RX, Todd-AO Absentia DX, Goyo De-Noise, and Waves Clarity VX Pro are all generally well-regarded.

https://www.accentize.com/dxrevive
https://acondigital.com/products/restoration-suite/
http://www.izotope.com/products/audio/rx/
https://absentiadx.com/
https://goyo.app/
https://www.waves.com/clarity-vx-vocal-noise-reduction

Each of these requires a bit of a learning curve so that the user can understand the principles involved, and they're not free (though several are affordable). They cost much more than Resolve ($100-$1000), but give you infinitely more adjustment on many parameters.

The advantage is you can reduce problems in layers: reverb, background traffic noise, a chair squeak, lip smacking, electrical hum... these all require different approaches. Sometimes multiple passes and multiple techniques have to be used to get the best results.

Separating dialogue from background music is kind of a "worst case" scenario, because there'll undoubtedly be conflicting frequencies that will mar recovering the dialogue cleanly. To this day, ADR (automatic dialogue replacement, or dubbing) is still necessary for all major TV shows, commercials, and feature films. There are situations where no amount of processing can overcome loud background sounds.

Ok thanks. But there is no dialog. It's machine sounds, but there is a ear-piercing noise at around 6500hz that ruins everything. It's not for any fancy project, so any way to just remove all sound above 6000hz is good enough for me.

Does turning down the volume in the Equalizer do anything (like attached image)?

Other options: Noise reduction (have it learn and then apply). Multiband compressor (Band 4, Gain -12). (if an effect works, remember that they can be stacked)

But yea, in general, listen to Marc, he knows what he's doing

When using the EQ did you try a Notch Filter in either the Inspector EQ or the track EQ in the Fairlight page?

There's a psychoacoustic effect that hides certain undesired noise completely when another, desired similar sound is just a bit louder. But if there's no such additional sound, a reduction by 24 dB will certainly not eliminate that undesired noise. It should be more than 70 dB. So you may try two or three notch filters in a row, all with the same setting.

When I have such narrow band noise problems I use the AUNBandEQ in Fairlight's standard package.

In that AUNBandEQ you can activate multiple channels. The display just goes down to -24 dB and the notch graphics may also have limits, but the numeric edit fields allow a gain entry of -96 dB and a width entry smaller than 0.001, but the display in the edit field will round that down to 0. So you need to check the real settings with the ears, not with the eyes.

Please note that these screenshots here appear cropped; to see the essential parts you need to scroll down within the screenshot frame.

Screenshot 2024-05-13 at 12.20.16.png (89.3 KiB) Viewed 130 times

Screenshot 2024-05-13 at 12.24.55.png (640.37 KiB) Viewed 130 times