How to Master a Voiceover

Updated August 2026 · by Loopin

Mastering a voiceover is not the same as mastering music — the goal is clarity and a consistent, comfortable level, not maximum loudness. Aim for around −16 LUFS integrated with a −1 dBTP ceiling, tame sibilance, and keep the noise floor clean. Here’s how to do it, free and in your browser.

What loudness should a voiceover be?

Spoken word sits quieter than music. A comfortable, natural target for voiceover is around −16 LUFS integrated — commonly anywhere from −19 to −16 LUFS depending on the platform and use — with a −1 dBTP true-peak ceiling so nothing clips after encoding.

The key difference from music: do not maximize loudness. A voiceover crushed to be as loud as a song sounds fatiguing, unnatural and harsh. You want it clear and present, not squashed.

Integrated loudness: ~−16 LUFS (a range of −19 to −16 is typical)
True peak: −1 dBTP so lossy encoding stays clean
Don’t brick-wall it like music — spoken word wants headroom and clarity

Priorities: what matters for spoken word

A great voiceover master is judged on intelligibility, not loudness. Four things carry the result:

Clarity: the voice should read effortlessly, present in the midrange without boom or boxiness.
De-essing: control harsh “s” and “t” sibilance so it never spikes or hisses.
Consistent level: quiet passages and louder emphasis should sit within a comfortable range from start to finish.
Clean noise floor: no hum, hiss or room rumble creeping up between phrases.

Fix the recording first (it’s often a mix issue)

Be honest about what mastering can and can’t do. Mastering acts on the whole finished file — it can even out overall level, add polish and set final loudness, but it can’t un-record background noise, plosive pops or an inconsistent mic distance.

If your voiceover has heavy room echo, loud AC hum or wildly uneven distance from the mic, that’s a recording and editing problem. Clean it at the source — noise reduction, plosive edits, gentle leveling — then master the polished file.

Record close and consistent, in a quiet, treated space if possible.
Edit out breaths, pops and long silences before mastering.
Apply noise reduction to the raw recording if there’s hiss or hum.
Then let mastering set the final tone and loudness on the whole file.

Step by step: master a voiceover

Once your voiceover is recorded, cleaned and edited, the master itself is quick:

Export your edited voiceover as a WAV (often mono for a single voice) so mastering has full quality.
Open Loopin’s free online mastering and drop the file in.
A/B Original vs Mastered and listen for clarity — the voice should read easily, with sibilance controlled.
Check the level stays consistent from the first word to the last, with no distracting noise floor between phrases.
Confirm it lands near −16 LUFS with true peak at −1 dBTP, then download the mastered WAV.
Use that WAV in your video, podcast or project rather than a low-bitrate MP3.

Mono and playback reality

Most voiceover is mono — a single voice doesn’t need stereo width, and mono guarantees it plays identically on phones, laptops and smart speakers. If your source is mono, keep it mono; a fake stereo spread on a single voice can even cause phase issues when a device folds it back down.

Because listeners often hear voiceover on small speakers or earbuds, the midrange is where intelligibility lives. A clean, present voice with a controlled low end travels far better than one drenched in bass or reverb. Think about the worst-case device your audience uses — a laptop speaker, a car, a phone held at arm’s length — and make sure the words still land there.

Keep it mono for a single voice unless you have a specific reason not to.
Prioritize the midrange — that’s where words are understood on small speakers.
Trim low rumble so it doesn’t waste headroom or muddy the voice.
Test on a phone speaker before you deliver — if it’s clear there, it’s clear anywhere.

Match voiceover to the use case

How loud and how polished your voiceover should be depends on where it lands. The −19 to −16 LUFS range covers most spoken-word delivery, but nudge within it for the context:

E-learning and explainers: around −16 LUFS, clear and forward so learners never strain.
Narration over music or video: keep the voice above the bed and lean toward the clearer end of the range.
Corporate and IVR/phone systems: consistency matters most — every prompt should sit at the same comfortable level.
Commercials: present and punchy, but still not crushed like a pop master.

Common mistakes

Mastering it as loud as music. Voiceover wants ~−16 LUFS, not a crushed −9 — loud spoken word is fatiguing and harsh.
Ignoring sibilance. Uncontrolled “s” sounds become painful once the level is raised; de-ess before pushing loudness.
Leaving a noisy floor. Hiss and hum get worse as you raise level — clean the recording first.
Trying to master a bad recording. Room echo and pops are recording issues; mastering polishes the whole file, it can’t rebuild the source.

Do it free, in the browser

You don’t need a studio or a plugin chain to get a clean, professional voiceover. Loopin’s online mastering runs a real chain — corrective EQ, multiband compression, saturation and a −1 dBTP true-peak limiter with loudness targeting — entirely in your browser. Nothing is uploaded, it’s free, and it takes a couple of minutes.

Master the WAV to a comfortable level, keep the voice clear and consistent, and it’s ready for any project.

Frequently asked questions

What LUFS should a voiceover be?

Aim for around −16 LUFS integrated — commonly anywhere from −19 to −16 LUFS — with a true peak of −1 dBTP. Spoken word sits quieter than music and shouldn’t be maximized for loudness.

Should a voiceover be mono or stereo?

A single voice is usually mono. Mono guarantees identical playback on phones, laptops and smart speakers, and there’s no benefit to stereo width on one spoken voice.

How do I stop harsh “s” sounds in a voiceover?

De-essing controls sibilance. Handle it before raising loudness, because harsh “s” and “t” sounds only get more painful as the overall level goes up.

Can mastering remove background noise from my voiceover?

Not really. Mastering acts on the whole finished file and can polish tone and level, but hiss, hum and room echo are recording issues — clean those at the source before mastering.

Can I master a voiceover for free?

Yes. Loopin’s online mastering is free, needs no account and runs in your browser — upload your voiceover, check clarity and level, and download a mastered WAV.