If you already have a voiceover and a music file, you just need a clean mix — speech on top, music underneath, one downloadable MP3.
Online mix vs editing app
CapCut can mix audio too. An online mix is useful when you want the voice + music file ready before you open the editor — or when you batch several Shorts in one sitting.
How the Studio mix works
- Generate (or keep) your AI voiceover
- Upload your background MP3
- Choose a low music volume
- Mix and download speech-with-music.mp3
What we do with your upload
Your music is used only to create the mix. Files are temporary and cleaned up after — they are not kept as a public music library.
Quick quality checklist
- MP3 under 12 MB
- Words still clear on a phone
- Music loops feel natural if the track is short
- Same voice + similar music style across a series
Put this into practice in Shorts Voice Studio.
Mix online in Studio