How to remove background noise and other voices from a video
Upload the recording to Vizard Agent and say what should not be in the audio. Vizard Agent transcribes the whole thing first so it knows who speaks when, analyses the background sounds across the recording, and works from word-level timings to remove the noise and the voices you named while leaving your speaker intact.
What do you type into Vizard Agent?
Name the unwanted sound and the wanted one. Vizard Agent can hear the difference between a voice and a hum, but it can't know which of two people in a room is the subject of your video. That distinction is the whole instruction, and it takes one clause. Upload the original audio, not a noise-reduced copy.
Prompt
What does Vizard Agent actually do?
Constant noise, like traffic, a fan or room hum, is a filtering problem. A second person talking off camera is a timing problem, because the fix has to know exactly when they spoke. So the first half of the job is listening and locating: what is in the audio, and precisely when, before any of it is touched. In the session behind this article it:
- Analysed the video's properties and transcribed the audio to see what the dialogue actually was.
- Analysed the audio and the voices to locate the background noise and anything else present, with a separate pass over the end of the recording for unwanted voices or sounds.
- Ran a detailed pass over all the background voices and noise across the full recording.
- Read the word-level transcript for precise timings, which turn "the other person talking" into exact intervals that can be treated.
- Inspected a grid of frames for the speaker's face, lighting and movement, and delivered the 5.02-second, 1080x1920 clip with the cleaned track in place of the original and the picture geometry preserved.
When does this not work well?
Separating sounds recorded together has a ceiling. Vizard Agent can lift a voice out of noise and cut a voice out of a gap, but it can't unmix two people speaking over each other, so that passage is better cut. Heavy noise reduction makes voices sound processed, wind and clipping can't be undone, and room echo can only be reduced a little.
Common questions
Can it remove one person and keep another? Yes, when they don't talk at the same time. Overlapping speech is where Vizard Agent stops working cleanly.
Will my voice sound processed? Not unless the noise is heavy enough to require it. Say "keep it natural" and Vizard Agent stays conservative.
Can I get just the audio file? Yes. Ask Vizard Agent for the cleaned track on its own if the edit is happening elsewhere.