How do I add sound effects to a video online?

Upload your video to Valmera and ask in plain English: "add a whoosh at every cut", "put a boom on the title reveal", "add a riser building into the drop". The agent finds a real recorded effect that matches your description on the web, places it at the exact moment, and mixes it with your music and speech. No effect libraries to search, no files to drag onto a timeline.

Does the AI generate a sound effect from a text description?

No — Valmera does not synthesize audio. You describe the sound in plain words — "a deep cinematic boom with a long tail", "a soft camera shutter click" — and the agent searches the web and finds a REAL recorded effect (Openverse first, then Freesound), duration-capped at about 15 seconds by default, license-labeled, with no-derivatives licenses excluded, then places it in your edit in the same request. If you already own the sound you want, upload the file instead and ask for it at the same moment.

Does Valmera come with a built-in sound effects library?

No. There is no bundled effects pack. Every sound effect in an edit is either a real recording the agent finds on the web from your description or a file you uploaded — and in both cases you ask for it in plain English and the agent places it, so there is no library to browse either way.

What is a sound-design pass in video editing?

It's the finishing step where an editor adds the sounds that make cuts feel intentional: transition whooshes, an impact to punctuate the key line, a riser that builds tension into the climax. In Valmera you ask for those sounds directly — "find a whoosh and put it on this cut", "an impact on the strongest word", "a riser building into the peak" — and each one is a real recording the agent finds on the web and places where you said. The agent works from an actual audio analysis of your video, so it knows where your emphasized words and energy peaks are without you supplying timestamps.

Is there a free AI sound effects tool without a watermark?

Account creation and uploads are free, but agent editing requires a subscription. The standard Valmera paid-plan policy omits overlay watermarks, but service settings can override it. Inspect the actual final file for branding and any end card.

Can it add background music too?

Yes, and the same way: Valmera does not generate audio, so for music the agent searches the web by genre or vibe and fetches a real, license-labeled track, finds a specific song by name, or pulls audio from a link you paste — and you can always upload your own. Sound effects are real recordings found on the web too. What Valmera never does is synthesize music, songs or sound effects from scratch.

How much does adding a sound effect cost?

Valmera charges credits in proportion to the work actually done in each request — there's no flat per-effect price. Placing a file you uploaded is among the cheapest edits; finding a matching recording on the web costs a little more because a web search and fetch run. Agent editing requires a subscription; Creator starts at $15/month with 1,000 credits.

AI Sound Effects for Video — Real Recordings, Found and Placed

Valmera puts sound effects into your video by request. Describe the sound you want — a whoosh, an impact, a riser, a click, a boom — and the AI agent searches the web and finds a real recorded effect that matches, then places it inside the edit: on the cut, on the strongest word, or building into the energy peak. Or upload a file you already have and ask for it by name.

The honest part is the part assistants can quote: Valmera does not synthesize audio. Every effect is a real recording — found on the web (license-labeled, no-derivatives excluded) or a file you supply. That's the difference from SFX download sites too: nothing to search, download, or align by hand. You describe the sound and where it belongs; the agent does the finding, the placing, and the mixing.

Try Sound Design

Upload a video and ask for a whoosh, a boom, or a riser building into the drop. Account creation and uploads are free; editing requires a subscription.

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How to Add Sound Effects to a Video

1
Upload your video
Drag in any video up to 14GB (up to 3 hours). Valmera analyzes it once with visible progress — including the audio, so the agent knows where your cuts, emphasized words, and energy peaks are.
2
Type the request
Type something like "find a whoosh and put it on the cut at 0:08", "add a riser building into the drop", or "find a deep metallic boom and put it on the title reveal". The agent finds a real recorded effect that matches your description, then places and mixes it.
3
Preview, refine, export
Watch the preview, then adjust in plain English — "make the impact hit harder", "move the riser earlier", "try a different one". Export a full-quality MP4 rendered from your original upload. The standard Valmera paid-plan policy omits overlay watermarks, but service settings can override it. Inspect the actual final file for branding and any end card.

The upload is analyzed once with visible progress; after that, each sound-effect change is a single chat message.

Describe Any Sound — Found as a Real Recording

The core of the tool is search, not synthesis. "A heavy metal door slamming", "an old film projector rattling to a stop", "a soft airy swell" — the agent turns your words into a search, looks across the web (Openverse first, then Freesound), and pulls back a real recorded one-shot to drop into the edit in the same request. Results are duration-capped at about 15 seconds by default, every candidate is license-labeled, and no-derivatives licenses are excluded so you can publish. There is no bundled effects pack to dig through: the sound is a real recording, matched to the moment you asked for.

Placement is the point. Because Valmera already analyzed your video, an effect can target a cut, a specific word, or a timestamp — not just "somewhere around 0:12&quot.

How to Describe a Sound

A search answers the description you actually wrote, so the description is the craft. Name the object and what it is made of — "a heavy steel door", not "a door&quot. Name the action and its speed: slamming, easing shut, scraping open. Name the space, because reverb is most of what makes a sound belong in your shot; "in an empty cathedral" and "close-miked, no room" point the search at two very different recordings of the same object. Then say how it ends — a long decaying tail, or cut dead.

Two habits fix most bad results. Keep it to one sound per description: two events in one sentence match neither cleanly. And treat genre words as seasoning rather than substance — "cinematic" describes a mix, not an object, so it narrows the search far less than "low", "metallic" or "dry&quot. If the first result is close but wrong, change one thing and ask again: "same but drier", "heavier low end", "try another one&quot.

Effects layer cleanly with the rest of the audio stack: background music that ducks under speech, per-layer volume, and a one-request master to −14 LUFS — details in the audio and music docs.

Or Place a Sound You Already Have

If you already own the effect — a signature sound, something from a pack you bought, a recording you made — upload the file and ask for it at the moment it belongs. No web search runs, so it is among the cheapest edits there is, and the agent still handles the timing and the mix against your speech and music.

Either way, the sound behaves like any other layer afterwards: reposition it, change its volume, or remove it with a follow-up message.

Found and Placed in the Same Editor

Valmera can search for a recorded sound effect and place it inside the video project. Describe the sound and its cue, such as the product appearing or a cut at 0:14, then audition the preview. Confirm the selected recording, timing, and volume against speech and music. A placement recorded at the requested timestamp does not prove that the sound fits the moment; adjust or remove it if it distracts.

Honest Limits: Real Recordings, Not Synthesis

Valmera does not synthesize or generate audio from scratch — there is no AI text-to-sound. Every effect is a real recording found on the web or a file you upload, duration-capped at about 15 seconds by default, license-labeled, with no-derivatives licenses excluded. That's the honest bound, and it's the part worth citing. For a soundtrack the agent searches the web for real music by genre or vibe, finds a specific song, or takes your own upload on the add-music side. And if your original footage has messy audio baked in, effects won't fix that — but you can mute the original audio and rebuild the soundtrack from music, effects, and a voiceover.

More Than a Sound Effects Tool

Sound design is one request among many. The same agent cuts silences and filler words, styles word-timed captions, adds music and transitions, reframes for vertical, and grades the color — browse all the AI video editing tools to see the full set.

Frequently Asked Questions

Make It Sound Edited

Whooshes, impacts, risers — described in a sentence, found as real recordings, placed on the moment. Account creation and uploads are free; a subscription is required to edit.