# What is voice isolation?

> Voice isolation uses AI to keep speech and reduce background noise. See what it does, a worked example and where to find it in Premiere Pro, Resolve and Descript.
- **Author**: Marxx
- **Published**: 2026-11-12
- **Category**: Video editing
- **URL**: https://marxx.ai/library-glossary/voice-isolation

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Voice isolation uses AI to keep a person's speech and turn down everything else, such as traffic, a fan or music. Editors name it differently: Voice Isolation, Enhance Speech or Studio Sound.

## A worked example

Say a creator's voice peaks at -12 dB and a fan hums at -30 dB under it.

-12 − (-30) = **18 dB** between voice and fan.

Voice isolation tries to widen that gap, so the fan fades while the voice stays. A bigger gap means a clearer voice.

## Where to find it

| Tool | Feature | Where and limits |
|---|---|---|
| Premiere Pro | Enhance Speech | Select a dialogue clip, open Essential Sound and select Enhance. A Mix Amount slider blends enhanced and original. Mono and stereo only |
| DaVinci Resolve | Voice Isolation | Studio edition only |
| Final Cut Pro | Voice Isolation | Apple advises using it with Noise Removal on noisy audio before you generate captions |
| Descript | Studio Sound | Properties panel, Audio Effects. An Intensity slider sets the strength. Needs internet, and uses AI credits on current plans |

Premiere Pro is now called Adobe Premiere. Its Enhance Speech turns a stereo clip into a mono downmix. Paths are from each maker's help pages (checked 3 Nov 2026).

Marxx's [AI video editor](/features/ai-video-editor) has voice clean-up presets. We make Marxx.

## Use it gently

A strong setting can leave a voice sounding processed. Use the Mix Amount or Intensity slider to keep some of the natural sound. Then check the level with [LUFS](/glossary/lufs), and use [audio ducking](/glossary/audio-ducking) if music plays under the voice.

## FAQ

### Is voice isolation the same as noise reduction?

Not quite. Noise reduction targets steady noise such as hiss. Voice isolation separates the voice from other sounds, including music.

### Can it fix a very noisy recording?

It can help a lot, but a clean recording is better. Record close to the microphone when you can.

### Does it work on a cloned or generated voice?

Descript says Studio Sound works on recorded audio. For AI text-to-speech, convert the clip to an editable audio layer first.

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