I mean this eFX Limiter shown above.

I would like to know what clip gain means.

I have not used the eFX Limiter before .. nor do I intend to after playing around with it.. YMMV. I prefer other brick-wall limiters with a absolute output ceiling parameter on a master bus. For music projects I prefer a limiter that adds a characteristic sound. An UA-1176 for instance.

That said, The 'Clip Gain' in the eFX Limiter is an amplification setting which can induce distortion, it ain't pretty sounding distortion though, unlike the above vacuum tube type limiter which adds a nice warm saturation.

1) Thank you for your response. Can you provide me a link to Vegas Pro 18 plugin with UA-1176 you use and you glad of using it?

2) Is UA-1176 plugin good for voice or maybe better for music? Will it worth purchasing for voice tracks?

The Universal Audio 1176 is a vintage outboard leveler (hardware). I would not consider it a good choice for VOs. There are plug-ins that 'emulate' the 1176 sound from Waves, IK, T- Racks, SF's legacy Wave Hammer and of coarse UA has it's own emulation version. For narration and such I like TDR's 'Limiter No.6', it has five stages but may be too complex for non-audio folks The popular LoudMax brickwall limiter/maximizer is simple to operate that has a max ceiling parameter and sounds pretty clean. The price is hard to beat,, free. I would put a soft-knee comp in front of it .

Thank you. I did some tests today with LoudMax, I am very glad of using it. The sound of narration started to be more clear, but I have a question about the right order of editing audio.

What should I do as first - export audio track with (?) or without (?) loud max limiter apply, apply noise reduction and then import such edited audio track to Vegas and apply limiter or firstly apply loud max limiter and then apply noise reduction effect?

I want to add that I do noise reduction in external Audacity software. Maybe you know some better software or pluign for audio noise reduction than Audacity noise removal feature. Please share it wtih me. Maybe there is a noise reduction plugin as good as loud max vst plugin, you can recommend it to me.

I have Vegas Pro 18 Suite version.

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Edited: I have Sound Forge Pro 14. What are the differences between Dehisser and Noise Gate? What should it be applied for microphone noise? What is hiss?

In addition to @rraud's informed advice, never use any AGC in the chain when recording narration, as it makes background noise louder when you are not speaking.

SF Pro 14 includes iZotope's RX elements (but not when included the w/ Vegas Pro package

RX elements is superior to the Audacity NR, and would not require leaving Sound Forge (or Vegas). I believe RX Elements is currently on sale at iZotope with a $100 savings..

A limiter is typically the final device a processing chain
De-hissers attenuate high frequency din type noise, usually associated with analog tape hiss.
A noise gate basically hard switches sound on and off based on a threshold. Gates can be quite audible and annoying. A similar 'expander' can be a little smoother. In the pro-audio music world, noise gates are popular for drum set tom-toms. I typically used expanders on noisy guitar amp channels ...or in a panel discussion mixing on-the-fly.

All that said, no noise reduction should be necessary for narration recordings. Undesirable sounds could be a result of poor set-up, microphone, preamp and/or the recording environment (extraneous noise leaking in).

@Musicvid - what is AGC? You mean something like "auto iso" for microphone/audio?

@MusicVid, @rraud

What do you think about brusfri plugin? I heard many good opinions about it.

You mentioned that no noise reduction should be necessary for narration recordings. But I am not sure if you are right. I have two mics: Sennheiser MKE 600. and Rode VideoMic. Every microphones creates their own noise, because none device is not ideal as human ears. In Sennheiser I get 16 dB noise and Rode gives me 20 dB noise. I understand it as when I record silence both of these mics I get 16 dB and 20 dB of noise in recordings resectivly. Am I right? So such noise reduction for narration is good choice, isn`t it?

Do you mean this link: https://www.izotope.com/en/shop/rx-8-elements.html?

Is this plugin (apart from noise reduction), able to reduce wind blowing sounds from audio?

What is better brusfri or RX8 plugin for the noises/sounds I mentioned above?