Sound makes the picture real
A silent AI clip looks generated. Put footsteps, cloth and the hum of a room under it and the same clip feels filmed. Plan time for sound the way you plan time for picture.
Free libraries
| Source | What the licence allows | Credit needed |
|---|---|---|
| YouTube Audio Library | Music and effects you can monetise, with no Content ID claims. | Only for Creative Commons tracks |
| Pixabay | Commercial use inside your film. | No |
| Mixkit | Commercial and personal use, no sign-up. | No |
| Freesound | Set per sound. CC0 and CC BY allow commercial use; CC BY-NC does not. | For CC BY sounds |
| Sonniss GameAudioGDC | A large free bundle every year; commercial use in films and games. | No |
On Freesound, filter for CC0 and you never have to think about credit. BBC Sound Effects and Zapsplat are popular too, but each has its own conditions: read their licence pages before you use them in paid work.
Paid libraries
Epidemic Sound and Artlist are subscription libraries with very large catalogues. They make sense once you publish every week or work for clients, because one licence covers everything you download.
Make the sound with AI
- ElevenLabs Sound Effects: type a description and get up to 30 seconds of sound. Included in the free plan for non-commercial use; commercial use starts on the Starter plan.
- Adobe Firefly, Generate Sound Effects: free daily generations with an Adobe account.
Describe four things: the source, the material, the space and the distance.
Heavy wooden door creaks open slowly, stone hall, long echo, heard from across the room Footsteps on wet gravel, steady walking pace, close microphone, open air Low wind over an empty desert, distant, no music
Layer it in four passes
- Room. One continuous ambience under the whole scene.
- Hits. The effects you can see: a door, a step, an impact. Line them up with the frame.
- Movement. Cloth, breath, small handling sounds. Quiet, but they sell the shot.
- Music. Last, and lower than you think.
Mute the music. If the scene still feels alive, the sound is doing its job.
Keep a licence note
For every project, keep a small text file listing each sound, where it came from, its licence and the date. It takes a minute and it answers any copyright question later.
Tools, prices and platform rules change often. Everything here was checked in November 2026; confirm on the tool’s own page before you rely on it.