Enhance Interview Video Audio — Clean AC Hum, Room Tone & Lav Hiss, Free in Your Browser
Make an interview sound like it was recorded in a treated room — clear the AC hum, the room tone and the lav-mic hiss off both speakers, then kill the dead air between answers. The picture stays exactly as you shot it, and you get a clean MP4. Free, in your browser, nothing uploaded.
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Eziclip's Sound Enhancer improves the audio of an interview video — it lifts AC hum, room tone and lav-mic hiss off a talking-heads recording, then shapes the voices so two speakers sound clear, full and present in the cut. Maximum mode clamps the room tone between answers down to near silence. The enhanced audio is muxed straight back onto your untouched footage, so you download a better-sounding MP4. Everything runs in your browser: nothing is uploaded, no watermark, no sign-up.
An interview cut is a noise problem at both ends of the table
A two-person interview is harder to clean than a single voice because the noise comes from two seats at once. Each speaker has their own lav clipped to a different shirt at a slightly different distance, so the mic hiss and clothing rustle don't match. The AC hum and the room tone of the space sit under both of them. And the moment the picture cuts from one talking head to the other, the bed of noise shifts — a different lav, a different self-noise floor — which is exactly what makes an unedited interview sound raw even when nobody said anything wrong.
Enhancing it means treating that whole bed, not just one channel. The Sound Enhancer learns the steady noise from the quiet parts of your own recording and lifts the AC hum, the lav-mic hiss and the room tone out from under both voices, so the interview reads as one clean, consistent space instead of two noisy mics taped into a room. The interviewer and the guest end up sitting in the same clear acoustic, which is what a finished interview is supposed to sound like.
The voices come forward — both of them
Clearing the noise is only half of what an interview needs. Strip the hum and hiss off a talking-heads take and the voices can still sound boxy and far back, like two people talking across a conference table to a camera in the corner. That's the room, not the noise, and a noise gate alone won't fix it. So after the cleanup the Vocal, Podcast or Voiceover preset shapes what's left — easing the boxy midrange an untreated room adds, lifting the presence band so words stay intelligible, and adding a touch of air on top.
The result is both speakers sitting forward and reading clearly, not just a quieter version of the same distant sound. Pick the preset that matches the tone of the interview — Podcast for a warm conversational two-hander, Voiceover for a tighter on-camera Q&A — and the tool routes the audio to the voice-tuned engine and applies the right curve. You're enhancing the interview, not merely subtracting hiss from it.
Maximum kills the room tone between answers
The tell of a home-shot interview isn't loud noise — it's the dead air. Between a question and the answer, while one person thinks, the room never actually goes quiet. The AC keeps humming, the lavs keep hissing, and every pause is filled with a low wash of room tone that a published interview wouldn't have. On a long-form sit-down those gaps add up to minutes of audible nothing.
Turn the strength up to Maximum and the enhancer runs a voice-isolation pass plus a voice-activity gate: it learns where the speech is and ducks everything that isn't a voice. The pauses between answers come back as true silence, the way an edited interview should sound, while the talking itself stays natural. It's built for speech, so it's exactly right for an interview — the gaps go clean, and the back-and-forth keeps its rhythm. Leave it lighter if you want some natural room left in the conversation; that's your call, and you can hear both before deciding.
Lift a quiet lav and a buried boom
Interview audio often comes in too quiet — a lav clipped a bit low, a guest who leaned back from a boom, a recorder set conservatively to avoid clipping. Raise it the naive way and you raise the lav hiss and the AC hum right along with it. "Boost quiet audio" lifts the level before the cleanup runs, so the enhancer sees a healthy signal and removes the noise you just brought up instead of locking it in. A guest who sounded distant comes back at a confident, usable level with the floor still clean.
It's peak-limited, so a sudden laugh or a raised voice won't clip after the boost. This is the fix for the classic interview problem — "I can barely hear my guest" — that doesn't trade a quiet-but-clean take for a loud-but-noisy one. Boost first, let the preset clean and shape, and both speakers land at a level that matches across the whole cut.
Hear it on the footage, keep the picture, MP4 out
When the pass finishes you get an Original ⇄ Enhanced switch right on your video, so you flip between the raw interview and the improved soundtrack while watching the talking heads — you hear the hum drop, the voices step forward and the gaps go quiet in context, before you commit. Your original is always kept, so if Maximum clamped a touch too hard or a preset took too much, re-run at a different setting; nothing is written over.
Export gives you a clean MP4: the enhanced audio remuxed onto your untouched footage. The video stream is copied, not re-encoded, so the picture of your interview is bit-for-bit what you shot — only the audio track is replaced. It's tuned for short-form, so segments up to about two minutes are the sweet spot, which covers the pulled quotes, cold opens and social cut-downs you lift out of a longer sit-down.
Free, private, and nothing uploaded
The whole thing runs on your own device through WebAssembly — the video is decoded, the audio enhanced, and the file remuxed in your browser. There's no upload, no server touching your footage, and nothing for anyone to keep. That matters for interviews specifically: an embargoed conversation, an off-the-record aside left in the raw track, a guest who hasn't cleared the segment yet — it physically has nowhere to go but your computer, and it works offline once the page has loaded.
And it's free: no watermark stamped on the export, no account to create, no paywall at the download. The engines download to your browser once and then everything runs locally. If a cleaner interview saved you from re-recording a guest you'll never get back in the room, there's a button to chip in — but the improved MP4 is yours either way.
How to enhance interview audio
- 1
Drop your interview clip in
Add the MP4, MOV or WebM straight from your interview — it loads into your browser and is never uploaded. Segments up to about two minutes work best, ideal for a pulled quote or a cold open from a longer sit-down.
- 2
Pick a voice preset, then push the room out
Choose Podcast or Voiceover so it routes to the voice-tuned engine and lifts the AC hum, lav-mic hiss and room tone off both speakers while shaping the voices forward. Turn strength up to Maximum to take the dead air between answers down to true silence, and switch on "Boost quiet audio" if a lav or a guest came in low.
- 3
A/B on the footage, then download the MP4
Flip Original ⇄ Enhanced right on your video to hear the hum drop and the voices step forward in context. When it sounds right, download a clean MP4 — the picture is copied untouched and only the audio is replaced. Free, no watermark, no sign-up; your original is always kept.
Questions
Drop the clip into Eziclip's Sound Enhancer and pick a voice preset like Podcast or Voiceover. It lifts the steady AC hum, lav-mic hiss and room tone off both speakers, then shapes the voices so they sit forward and clear, and muxes the result back onto your untouched footage. Turn strength up to Maximum to silence the room tone between answers, and Boost quiet audio if a lav came in low. You A/B it on the video, then download a clean MP4. It's free, runs in your browser, and nothing is uploaded.
Yes — that's the case it's built for. The enhancer learns the steady noise floor from the quiet parts of your own recording and lifts the AC hum, room tone and lav-mic hiss out from under both voices, so the interviewer and the guest end up sitting in one consistent, clean space instead of two mismatched mics in a room. The voice-tuned preset then shapes both speakers forward, not just one.
Turn the strength up to Maximum. It runs a voice-isolation pass plus a voice-activity gate that learns where the speech is and ducks everything else, so the pauses between a question and its answer come back as true silence while the talking stays natural. It's built for speech, which makes it ideal for the dead air in a long-form interview. Leave it lighter if you want some natural room left in the conversation.
No. Only the audio is replaced — the video stream is copied untouched, so the picture of your interview is exactly what you shot, with no quality loss. You download a clean MP4 with your original footage and an improved soundtrack.
Nothing is uploaded. The video is decoded, the audio enhanced, and the file remuxed entirely in your browser via WebAssembly, so an embargoed or unreleased interview never leaves your device — and it works offline once the page has loaded. It's free for everyone: no sign-up, no watermark on the export, and no paywall at the download step.