Add Background Music to a Screen Recording — Free

A narrated screen recording over dead silence sounds unfinished — every pause in your speech is just room tone and keyboard noise. A music bed fixes that, but the usual price is a detour through a video editor: import the recording, lay the track, then keyframe the volume down by hand every single time you talk, and back up every time you stop.

SuperchargeCapture’s editor does the whole job at export. Upload a track, switch Music on, set a volume, and let the ducking ride the fader for you.

Bring Your Own Track

Click Music in the editor, upload an audio file, and it becomes the bed under your recording. Any format your browser can decode works — MP3, WAV, OGG. There’s no bundled music library, and that’s deliberate: it keeps licensing unambiguous (you pick music you have the rights to) and it keeps the feature local, since your track is mixed on your machine rather than matched against a catalog somewhere.

Length is handled for you. A 40-second loop under a three-minute walkthrough repeats until the video ends; a five-minute track under a one-minute clip stops at the end of the export. No pre-trimming required.

Ducking That Rides the Fader for You

Turn on Duck under speech and the editor analyses your recording’s own audio before mixing. It measures the level in roughly 30-millisecond windows across the whole track, then schedules the music’s volume against what it found: silence means full music, speech means the music drops to about a quarter of the volume you set, and everything in between scales smoothly. The result is the radio-style effect — music swells in the gaps, tucks itself under your voice the moment you start talking — without a single manual keyframe.

Two honest details about how it behaves. First, it responds to sound, not specifically to voices: if your recording’s audio includes a loud system chime, the music will duck under that too. In a typical narrated recording this doesn’t matter, because your voice is the audio. Second, if the recording has no audio track at all, there’s nothing to duck under, so the music simply plays at your chosen level throughout.

The Controls

The panel stays small on purpose:

Ducking is on by default because narrated recordings are the common case. For a montage with no voiceover, switch it off and the bed holds steady.

One format note: music applies to WebM and MP4 exports. GIFs carry no audio, so a GIF export ignores the music settings entirely.

Mixed at Export, on Your Machine

The mix happens during export using the browser’s own audio engine. Your recording’s audio, the music, and the ducking curve are combined into the final file locally — there’s no server render, no queue, and no version of your recording or your music sitting on someone else’s disk. Pair it with auto-captions and silence removal and the editor covers the full narrated-video cleanup without leaving the browser.

Questions? Reach out at support@superchargebrowser.com.