The bed is its own clip on its own track, so its level is a decision you can revisit.
Add background music to video by putting the track on its own layer and deciding what it does against everything already playing. Music, narration and effects each keep their own level, so scoring a cut is a mix you build. All of it happens in your browser, next to where the footage was made.
How to add music to a video in three steps
- 01
Bring in the track
Drop in music you have, or describe the piece you want and generate it here.
- 02
Set where it sits
Slide it under the picture, then take the level down until speech reads over it.
- 03
Export the scored cut
One MP4 at 4K or below, rendered on your machine with the mix already inside it.
What scoring a video here involves
Stacked audio layers are a Compose V2 capability, and V2 is switched on per workspace.
A layer for every sound
Music, voiceover and effects each get their own audio track. Every clip on every track carries its own level, and that is what makes a score sit under a voice instead of fighting it.
Music written to order
Describe a style and a mood, give it a length to aim for, and generate the piece in the same workspace as the cut. Turn vocals on and it sings, either your lyrics or ones it writes.
Levels that move with the scene
Gain is automatable like any other property, so a bed can fall away under a line of dialogue and come back after it. That dip is the difference between a video with music on it and a video that was scored.
Mix by asking
Bring the music down under the voiceover is an instruction Copilot can carry out across the whole timeline, reading the current mix state before it touches anything. Whatever it changes is one undo.
Crossfades between cues
Where one piece of music gives way to another, an equal-power crossfade holds the level steady through the join. The same joins carry picture transitions when you want them.
Out as one file
The mix renders into the MP4 itself. At the project quality or one you pick, locally, with nothing queued.
A score is easier when the picture has somewhere to breathe. When a cue needs a few seconds of something and the footage has none, the shot can be generated in the same workspace, from the same roster the rest of the project draws on, and laid over the bar where the music opens up. Seedance 2.5 is one of the video models available for it.
Add audio to video
Three different things go by this name, and the timeline treats all three the same way:
- A voiceover is an audio clip.
- A sound effect is an audio clip.
- A song is an audio clip.
Each lands on its own track with its own level. That matters when they overlap: a narrator over a bed over room tone is three faders, and the balance between them is the only thing you will come back to. Flatten it early and every later change means returning to the source. Keep it separate and one cut carries a different mix for a client, a platform or a language.
Add a song to a video
A song brings a structure the picture has to respect, so generate it before you cut rather than hunting for a track that nearly fits.
- Describe it plainly. Pop, gospel, something slow and warm. Name the mood.
- Give it a length close to the section it is scoring.
- Switch vocals on to have it sung, with lyrics you paste or lyrics it writes.
What comes back is an original piece with no named artist behind it, and it drops onto the timeline as a normal clip to trim, fade and move.
Background music that sits under narration
The craft of a music bed is level, and level is rarely one number. Speech does not hold a constant volume, so a bed set once is too loud under the quiet lines and inaudible under the rest. Two routes, same cost:
- By hand — a point before the line, a lower point under it, a return after.
- By instruction — Copilot reads the mix, runs the pass everywhere it belongs, and lands it as one undo.
Either way the music keeps its own clip and its own track, and the narration underneath is untouched. For a door or a footstep instead, the sound effects library is the other half of this. When the track is meant to replace what was recorded, remove sound from video first and mix into the space that leaves.
Related video tools
Online video editor
The timeline this mix lives on, with picture, titles and colour beside it.
Remove audio from video
Take the original sound off first when the track is meant to replace it.
AI music generator
Write the cue itself: style, mood, length, and vocals if the piece wants them.
AI voiceover generator
The narration the music is meant to sit under, made in the same workspace.
Sound effects library
Single hits and textures for the moments a music bed cannot carry alone.
Video merger
Join the clips first, then score the finished sequence in one pass.
Lyric video maker
When the song is the subject, not the bed, put the words on screen.
Video trimmer
Tighten the picture to the bar it should land on before the mix is settled.
