Automatically dipping one track's volume whenever another is active — most commonly lowering background music under a voice. It is what makes narration audible without having to fade the music manually.

Can I put new audio on an existing video?

Yes. Export as video and choose which clip supplies the picture; the mixed audio replaces its original sound.

🎚️ Media Mixer

Mix several audio/video tracks into one — per-track volume, timing, fades, pitch and ducking.

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About Media Mixer

Combining several audio or video tracks into one — a voice-over over background music, several recordings layered together, or a video whose soundtrack you want to replace.

How to use it

Add the tracks you want to mix.
Set each track's volume and start time, and add fades where you need them.
Use ducking to automatically lower the music whenever the voice track is speaking.
Export as audio, or as video keeping the picture from a chosen clip.

Frequently asked questions

What is ducking?: Automatically dipping one track's volume whenever another is active — most commonly lowering background music under a voice. It is what makes narration audible without having to fade the music manually.
Can I put new audio on an existing video?: Yes. Export as video and choose which clip supplies the picture; the mixed audio replaces its original sound.