Reduce Background Noise in a Video
Make shaky audio sound clean. ExpoCut isolates the voice with on-device stem separation, balances loudness, and tames harsh frequencies — so your talking clips sound clear without a studio.
Free plan available · runs on-device · your media never leaves your phone.
Quick answer: To reduce background noise in a video, open the clip in ExpoCut on iPhone or Android and use Stems: two-tier on-device audio stem separation (a fast mode and a studio mode) isolates the voice so you can lower the music and ambience behind it. Then balance loudness so quiet and loud sections even out, tame harsh frequencies, and export clean audio with your video at up to 4K. Everything runs on-device — nothing is uploaded — and ExpoCut offers a free plan.
| At a glance | Detail |
|---|---|
| Platforms | iOS, iPadOS, Android |
| Noise reduction | Voice isolation via two-tier on-device stem separation (fast + studio) |
| Loudness | Balancing evens out quiet and loud sections |
| Tone shaping | Tame harsh or muddy frequencies |
| Export | Clean audio with your video at up to 4K |
| Privacy | Runs fully on-device — audio never uploaded, works offline |
| Price | Free plan available |
Last updated:
How to clean up noisy audio
Add the clip
Drop the noisy video or audio onto the timeline.
Isolate the voice
Use Stems to separate the voice from background music and ambience on-device — two-tier separation offers a fast mode and a studio mode — then keep the voice and lower the rest.
Balance loudness
Even out quiet and loud sections so the voice sits at a consistent level.
Polish & export
Tame harsh or muddy frequencies, then render clean audio with your video at up to 4K.
A clean voice without a studio
Voice isolation
On-device stem separation pulls the voice forward and pushes background noise back.
Loudness control
Normalize levels so viewers don’t reach for the volume.
Tone shaping
Cut harshness and boom so speech sounds natural.
Private & offline
All processing is on-device — your audio is never uploaded.
Frequently asked questions
How do I remove background noise from a video for free?
In ExpoCut, use Stems to isolate the voice from background music and ambience on-device, lower the non-voice stems, then balance loudness. A free plan is available.
Does noise cleanup upload my audio?
No. Stem separation and audio cleanup run on your phone, so your audio stays private and it works offline.
Can I fix audio that’s too quiet then too loud?
Yes — loudness balancing evens out the level across the clip so the voice stays consistent.
Related guides
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Make your audio sound clean
On-device voice isolation and loudness control. Free plan available.