@kirk-dickinson

Start with Track EQ which is applied to the audio tracks by default. You can adjust the filters to suit your needs.

There are other fX that come with Vegas as well as those in Sound Forge and external applications. Upload a sample file to a cloud share and post the link. Possibly, someone will characterize the nature of the noise and give you more detailed advice.

I cropped out just an area with no dialog, only noise. This forum allows small MP3 uploads. It is picking up a fan in the other room and maybe a computer fan.

Try the parametric EQ. I was able to remove a good bit of the noise with it, but without some speech or something else to compare the noise to in the audio, it's hard to tell if i'm cropping into those frequencies or not... can you post that if my suggestion doesn't work?

I've had better luck with noise removal in Audacity, which is a free program you can download. You would need to export your audio as a Wav file, bring it into Audacity, render out a cleaned up Wav, and then open that in Vegas. A pain, but works great.

It's very complex noise; Izotope RX is probable your best bet.

It's very complex noise; Izotope RX is probable your best bet.

I am about to do a search. Is this available as a Vegas a plug-in or a completely separate program?

It is a separate program which can be used as standalone application but also as vst plugins in Vegas.

There are several versions of it (Elements, Standard, Advanced) at different price points. But even the lowest version is quite capable. You can download a trial and check it yourself.

https://www.izotope.com/en/products/rx.html

@kirk-dickinson Try @JaredF's suggestion first as Audacity is free and might remove your noise although I'm not sure about the clicks in your sample.

The SpectraLayers Pro spectrogram of the mp3 that the OP has uploaded looks like this:

The horizontal bands are the hums, the greener they are on the spectrogram the louder they are. Track EQ in Vegas Pro should be able to remove the noise/hum under 150 Hz which is the major source of the hum/noise. Removing the higher frequency probably won't be so easy to remove unless using SpectraLayers or the spectral functions in RX. The spaces created by the frequency band removal can be replaced with generic noise if so wanted.

It took only a few minutes in SpectraLayers to remove the bands of hum and to remove the clicks using the clone stamp tool, the result being:

@kirk-dickinson

Using iZotope 8, I identified 5 of the offending frequencies. In Vegas Pro 19, I used TrackEQ to create five filters to cut the offenders.

@fr0sty is correct that none of us know the effects on any music or speech that may on the same track.

Sound Forge Pro (SFP) includes the 'Noise Reduction Pack' (aka, NR-2.0) and iZotope's, RX Elements, Both of which work well on constant 'din' type (white) noise like HVAC and distant traffic. Both have click removal tools as well. In SFP, some clicks can be drawn out in the waveform but it can be difficult. Severe clicks that can't be effectly attenuated in SFP can usually be totally eleminated with iZ's RX Advanced or Steinberg's SpectraLayers Pro (which was formally an SCS product along with Vegas and Sound Forge) Neither are low budget items, but SLP is included with the SFP Suite version, which is well worth the upgrade cost from the standard SFP. IMO, SpectraLayers Pro is nothing short of amazing, but there is a leaning curve to manually editing the spectrograph. display. There are many 'auto' tools though and SLP is less than half the cost of the RX Advanced ($1,000+).
Sound Forge Audio Studio (SFAS) has noise reduction tools as well, but they are not as good as NR-2.0 or RX Elements.. you get what you pay for.

EQ does not work very well for HVAC type noise due to the broadband frequency content, but it can help in some instances.

rraud, Sound Forge forum moderator

Sound Forge Pro (SFP) includes the 'Noise Reduction Pack' e to the broadband frequency content, but it can help in some instances.

I have Sound Forge Pro 14. I got it in the bundle with the previous Vegas Pro upgrade. I have never used it. I will poke around in there and see that I can figure out.

Thanks