AI music generator: a track for your video, to the second
By VODOO AI · · 4 min read
Music decides how a video feels before anyone hears a word. Stock libraries make you search for an hour and then cut a three-minute track down to fifteen seconds. An AI music generator works the other way round: you say the mood, the instruments and the length, and you get a track made for that video.
This guide covers how to describe music when you can't read it, briefs to copy for the most common videos, and how to sit a track under a voice so the words still come through.
Describe music without knowing music
You don't need any music words. Four things are enough, in plain language, and the order doesn't matter much.
The mood
- For example
- Warm and hopeful, tense, playful, calm, confident
Two or three instruments
- For example
- Soft piano and strings, a punchy drum loop and bass, acoustic guitar
How it moves
- For example
- Builds slowly, starts big, drops out at the end
The exact length
- For example
- Fifteen seconds, thirty seconds, ninety seconds
| Say | For example |
|---|---|
| The mood | Warm and hopeful, tense, playful, calm, confident |
| Two or three instruments | Soft piano and strings, a punchy drum loop and bass, acoustic guitar |
| How it moves | Builds slowly, starts big, drops out at the end |
| The exact length | Fifteen seconds, thirty seconds, ninety seconds |
Make it the length of the video
The biggest win over stock music is length. Ask for the exact length of your edit, and say where the moments are: "builds for ten seconds, peaks at twelve, ends cleanly at fifteen". A track that ends on the last frame feels finished. One that's faded out halfway through a bar feels cheap.
- Ads: 15 or 30 seconds, with a clear ending.
- Reels and Shorts: 7 to 20 seconds, starting strong, because people swipe early.
- Explainers and product videos: 60 to 90 seconds, quieter, steady, no big drops.
- Loops for a website or a shop screen: ask for a seamless loop.
Briefs to copy
A confident, stylish track for a fifteen-second fashion ad: a tight drum groove, deep bass and short synth stabs, starting straight away, building at eight seconds and ending cleanly on the last beat. No vocals.Make this in VODOO →
Calm, optimistic background music for a sixty-second product explainer: soft piano, light plucked strings and a gentle pulse, steady throughout with no big drops, quiet enough to sit under a voice. No vocals.Make this in VODOO →
A warm, bouncy afrobeats bed for a twelve-second food reel: hand drums, a bright guitar riff and shakers, upbeat from the first second, ending on a clean hit. No vocals.Make this in VODOO →
Music under a voice
When someone is speaking, the music has to leave room. Ask for "no vocals" and "quiet enough to sit under a voice", and avoid busy melodies in the same range as speech. When you put them together, keep the music well below the voice: if you have to strain to hear a word, it's too loud.
- No sung words under spoken words.
- Fewer instruments while someone talks, more in the gaps.
- Let the music come up for the last two seconds, after the final line.
Using the track
Before you use a track in a paid ad, check the usage terms for the plan you're on. Keep the brief you used with the file: if a platform ever questions a track, it shows how it was made. And don't upload a famous song to copy it. A track that sounds like a known song can still get your video muted or taken down.
Make your first track
- 01Open CreateChoose Music and say the mood, a few instruments and the length.
- 02Listen with the picturePlay it under your video, not on its own. Music that sounds plain alone often works best under a picture.
- 03Ask for a changeIf it's close, say what to change: slower, fewer drums, a cleaner ending.
Start in Create with 300 free credits a month, no card needed. For the voice on top, see our AI voice generator guide.
Questions people ask
- What is an AI music generator?
- A tool that makes a new piece of music from a description: the mood, the instruments and the length you need.
- Can I choose the exact length?
- Yes. Ask for the length of your video, in seconds, and say where you want it to build and end.
- Can AI music have vocals?
- It can, but for ads and videos with someone speaking, ask for no vocals so the words come through.