How to Use Voice Isolation When Recording on Mac

To use Voice Isolation on a Mac, open your recording app and turn its microphone on. Then open Control Center in the menu bar (or the microphone menu macOS shows while a mic is in use), click Mic Mode and choose Voice Isolation. Mic Mode only appears while an app is using the microphone, and not every app's audio is affected by it.

Set the mode before you press record. Voice Isolation is applied as the audio is captured, so you can't remove it from the file later. That trade-off is the main thing to weigh against cleaning up the audio after recording, which we cover below.

What Voice Isolation does on Mac

Voice Isolation is one of the macOS mic modes. It processes your microphone signal live, keeping your voice and suppressing background sound such as a fan, traffic or keyboard noise. Your app receives only the processed signal, so the unprocessed version is never recorded.

The modes you'll usually see under Mic Mode are:

• Standard: normal microphone processing.
• Voice Isolation: prioritizes your voice and suppresses sounds around you.
• Wide Spectrum: picks up your voice and the sounds around you, such as an instrument or the room.

Mic modes only change the microphone. Sound playing on your Mac (system audio) is a separate signal and isn't affected.

Turn on a mic mode before you record

1. Open the app you'll record with.
2. Turn on its microphone. In most recorders this means picking a mic in the audio settings. Some apps only open the mic once recording starts.
3. Click Control Center in the menu bar (the icon with two toggle switches).
4. Click Mic Mode.
5. Choose Voice Isolation.
6. Start your recording.

If Mic Mode isn't in Control Center, check the microphone or video menu that macOS adds to the menu bar while the mic or camera is in use. If it's in neither place, the app hasn't opened the microphone yet. Start a short test recording, set the mode, then record your real take.

Check whether your recorder supports it

Support depends on the app and how it captures the microphone. The only reliable way to know is a quick A/B test:

1. Record 15 seconds with Mic Mode set to Standard. Talk while something noisy runs nearby, like a fan, or tap on your desk.
2. Record the same thing again with Voice Isolation.
3. Play both back with headphones.

If the two takes sound the same, mic modes aren't being applied to that app's audio. Use noise reduction after recording instead (see below).

Use Voice Isolation with Screen Bolt

Screen Bolt has its own microphone clean-up in the editor, called Audio Enhance, which includes a Noise Reduction step. Running a second denoiser on audio that Voice Isolation already cleaned can make a voice sound thin or over-processed, so Screen Bolt avoids it: if Voice Isolation is on when you start recording, Screen Bolt remembers that and skips its own noise reduction for that recording.

1. In the recording bar, click Mic and choose your microphone. A thin level meter appears under the Mic button while the mic is on.
2. Open Control Center, click Mic Mode and choose Voice Isolation. If Mic Mode isn't listed yet, start a short recording, set the mode, then click Discard and restart to throw that take away.
3. Choose Display, Window or Area, then click the red record button.
4. When the editor opens, open the Audio panel (⌘4, Command-4) and find Audio Enhance.
5. Under Noise Reduction, Screen Bolt shows "Skipped for this recording: macOS Voice Isolation already denoised the mic at capture."
6. Turn on Voice Clarity and Volume Normalization if you want them. They still apply. | Option | What it does | With Voice Isolation on at capture | |---|---|---| | Noise Reduction | Removes background noise from the mic track (DeepFilterNet 3, with RNNoise as a fallback) | Skipped | | Voice Clarity | High-pass at 100 Hz, presence boost around 3 kHz, compression (about 3:1) | Still applies | | Volume Normalization | Brings the mic track to about −16 LUFS | Still applies |

Auto Audio Enhance switches on all three at once. They're all off by default, work only on the microphone track, run on your Mac, and are used in both the preview and the export. If you want to know what −16 LUFS means, see what loudness normalization is.

Two details matter. Screen Bolt checks the mic mode when recording starts, so switching to Voice Isolation partway through a take won't be picked up. And Screen Bolt never turns Voice Isolation on for you; it only detects it.

Voice Isolation vs noise reduction after recording

Both remove background noise. The difference is when the filtering happens and whether you can take it back.

Pick Voice Isolation if your room is noisy, you record often, and the A/B test showed it works in your recorder.

Pick noise reduction after recording if you want to compare before committing, you can't redo the take, or your recorder isn't affected by mic modes. Our guide to removing background noise from a screen recording covers that route.

Don't stack both on the same audio. That's the reason Screen Bolt skips its own step when Voice Isolation was on.

When to leave Voice Isolation off

Use Standard (or Wide Spectrum) when:

• Your room is already quiet and your mic is good. Voice Isolation has little to remove and can still change how your voice sounds.
• You want sounds other than your voice, such as an instrument, a device beeping on your desk, or real keyboard clicks in a coding video. Voice Isolation treats those as noise. In Screen Bolt you can add typing sounds back with Keyboard Sounds in the Sounds panel, which needs Input Monitoring permission.
• You can't redo the take. A clean original with noise reduction applied afterward is safer, because you can switch the effect off if it sounds wrong.

Mic choice and placement often matter more than any filter. If background noise is a constant problem, see how to choose a microphone for screen recording on Mac. If you record with AirPods, read using AirPods to record screen audio on Mac first.

If it doesn't work

Mic Mode doesn't appear. No app is using the microphone yet. Turn the mic on in your recorder or start a test recording, then open Control Center or the menu bar microphone menu again.

You chose Voice Isolation but the recording sounds the same. Mic modes probably aren't applied to that app's audio. Run the A/B test. If there's no difference, use the app's own noise reduction or clean the audio in an editor.

Your voice sounds robotic, underwater or clipped at the ends of words. The filter is too aggressive for your mic or room. Switch to Standard, record again, and apply noise reduction afterward so you can compare.

Screen Bolt says Noise Reduction was skipped. That's expected when Voice Isolation was on when the recording started. To use Screen Bolt's noise reduction instead, set Mic Mode to Standard and record again.

You switched modes mid-recording. Screen Bolt only checks the mode at the start, so it won't know about the change. Set the mode before you press record.

There's no voice in the recording at all. That's an input or permission problem, not a mic-mode one. Check that the right mic is selected and that your recorder has Microphone access: open System Settings, go to Privacy & Security, then Microphone. Our guide to fixing a Mac screen recording with no sound walks through each cause. For Screen Bolt, see the Screen Bolt troubleshooting page.

FAQ

Does Voice Isolation remove noise from system audio? No. Mic modes only change the microphone signal. Sound your Mac plays is captured separately, and in Screen Bolt it's saved as its own track.

Can I remove Voice Isolation from a recording afterward? No. It's applied during capture and the unprocessed audio isn't recorded. If you're unsure, record with Standard and use noise reduction in your editor, which you can turn off later.

Does Voice Isolation work with an external microphone? Select the external mic in your app, turn it on, and check whether Mic Mode appears. Then run the short A/B test to hear whether it makes a difference with that mic.

Do I still need Screen Bolt's Audio Enhance if I use Voice Isolation? Not its noise reduction, which Screen Bolt skips in that case. Voice Clarity (high-pass, presence boost, compression) and Volume Normalization (about −16 LUFS) still apply and are worth trying.

Screen Bolt's free version includes Audio Enhance; exports are limited to 3 minutes at 720p with a watermark until you buy a license. See Free vs Pro.