How to add voice-over and music to your animated video

Videos recorded in Editor de Vídeo Online come out silent — on purpose: you decide whether the video gets narration, music, both or neither, and you can fine-tune it all in the editor you prefer. In this guide you will learn to add voice-over to video and pick the right soundtrack, with options for desktop, phone and the command line.

Narration, music or both?

Recording the narration

Minimum gear

• A lavalier mic or a headset mic is already a big step up from a laptop microphone.
• A small room with soft furnishings (curtains, sofa, clothes) reduces echo.
• Record 20 cm from the mic, always at the same distance.

Voice tips

• Read the script aloud before recording.
• Speak a little slower than in conversation.
• Smile in positive passages: it changes your tone.
• Record sentence by sentence; it is easier to edit.

Use your phone's recorder or free software like Audacity.

Choosing music

• Use royalty-free libraries: the YouTube Audio Library, the platforms' own music (Instagram, TikTok) or licensed stock music sites.
• Choose the mood by video style: Dynamic collages call for a beat; Soft calls for piano or guitar.
• Keep music 15 to 20 dB below the narration.

Combining audio and video

On a computer

Free editors like CapCut, DaVinci Resolve, Shotcut or Clipchamp all work like this:

1. Import the Editor de Vídeo Online MP4 and the audio file.
2. Place the video on the video track and audio on the audio tracks.
3. Fit the length: trim the end of the music and add a fade-out.
4. Export as MP4 (H.264, AAC).

On a phone

Apps like CapCut, InShot or Instagram's and TikTok's built-in editors let you add voice-over and music on top of the video.

On the command line (ffmpeg)

If you already use ffmpeg:

ffmpeg -i video.mp4 -i narration.mp3 -c:v copy -c:a aac -shortest video_with_audio.mp4

-c:v copy keeps the video without re-encoding and -shortest ends at the end of the shorter file. More about ffmpeg in how to convert WebM to MP4.

The right order: audio first or animation first?

Audio first is the most professional route for explainers:

1. Record the complete narration.
2. Measure each section's length.
3. Adjust each scene's pace and length in Editor de Vídeo Online to match the audio.
4. Join the scenes in the Studio (see how) and then add the audio.

Animation first works for short social videos where the music is chosen afterwards.

Captions

Many people watch on mute. Use auto captions (YouTube, Instagram, TikTok, CapCut) and review them. Captions also help accessibility and YouTube SEO.

Frequently asked questions

Can I use AI narration?

Yes. Synthetic voices have improved a lot. Check the service's commercial license and review the pronunciation of names and technical terms.

How loud should the music be?

With narration, music should be an almost unnoticeable "bed". Without narration, it can sit in the foreground.

Why do Editor de Vídeo Online videos have no sound?

Recording captures only the animation, giving you full freedom when editing the audio.

Conclusion

Good narration and a well-chosen soundtrack double an animated video's impact. Record calmly, pick royalty-free music and combine everything in your preferred editor. Start with the animation in Editor de Vídeo Online.