SFX Gen turns written descriptions into downloadable sound effects for games, trailers, UI, animation, and other creative projects. Describe the sound you need, choose a target length and number of variations, then generate isolated audio clips that can be previewed, edited, downloaded, searched, and organized into projects.
What it does
SFX Gen generates sound effects from text prompts. It is designed for clean, isolated effects rather than songs or dialogue, making it useful for game actions, ambience layers, impacts, interface sounds, creature noises, cinematic hits, environmental audio, and short audio cues.
The current visible generation model is Seed Audio 1.0, described in the tool as a full-scene audio model for higher-quality SFX and cinematic sound design. Generated sounds are produced as MP3 audio at 48kHz.
You can generate a single sound or create up to four variations from the same prompt. Result cards are added to the gallery immediately, so you can queue additional batches without waiting for the previous batch to finish.
Key features
- Text-to-SFX generation — describe the sound effect you want in natural language.
- Target length control — request a sound from 1 to 120 seconds.
- Variations — generate 1, 2, 3, or 4 versions of the same prompt.
- 48kHz MP3 output — useful for quick game, video, and media workflows.
- Waveform preview — completed sounds display a visual waveform.
- Click-to-seek playback — click the waveform to play from a specific point.
- Download individual sounds — save a completed sound as an MP3 file.
- Download all or selected sounds — batch-download completed sounds from the current view.
- SFX Editor handoff — open a completed sound in the SFX Editor from its card and save the edited version back.
- Projects — organize sounds into project tabs and drag completed sounds between projects.
- Search — filter sounds by name or prompt.
- Rename and delete — rename generated sounds and projects, remove individual sounds, or bulk-delete selected sounds.
- Signed-in library — generated sounds and projects are saved to your account. Signed-out users may see demo content but cannot generate new sounds.
Typical workflow
- Open SFX Gen.
- Sign in if you want to generate new sound effects.
- Enter a description in the Prompt box.
- Set Target Length with the number field or slider.
- Choose Variations: 1, 2, 3, or 4.
- Click Generate SFX or Generate X SFX.
- New sound cards appear in the gallery while generation runs.
- Preview completed results with Play, or click the waveform to play from a specific position.
- Download, edit, rename, move, or delete the sounds you want to keep.
You can also press Enter while focused in the prompt field to generate. Use Shift + Enter to add a new line to the prompt instead.
Prompting tips
Good SFX prompts are specific about the source, texture, action, environment, intensity, and ending. SFX Gen automatically steers generation toward a clean, isolated sound with a clean start and natural ending, so your prompt can focus on the audible result.
Useful details to include:
- Source: sword, stone door, laser, rain, monster, engine, magic spell
- Action: whoosh, scrape, crack, burst, rumble, click, impact, dissolve
- Material: metal, glass, wood, stone, fabric, electricity, water
- Scale: tiny, heavy, distant, close-up, massive, subtle
- Mood or style: cartoon, realistic, cinematic, dark fantasy, sci-fi, retro arcade
- Timing: short sting, slow buildup, quick impact, lingering tail
- Environment: dry studio sound, cave echo, outdoor forest, underwater, spaceship interior
Example prompt styles:
- “Heavy stone door grinding open, deep low-frequency rumble, dust falling, ancient temple ambience, no music.”
- “Short magical sparkle pickup sound for a fantasy game, bright chimes, clean ending.”
- “Sci-fi plasma rifle shot, sharp electric crack with a brief energy tail, isolated.”
- “Cartoon slime creature squish and pop, playful, short and clean.”
For game-ready effects, include phrases such as “isolated,” “no music,” “no dialogue,” “clean start,” or “short tail” when appropriate. Avoid requesting narration, dialogue, or background music unless you intentionally want those elements.
Options and settings
Model
SFX Gen currently shows Seed Audio 1.0 as the available model. The model panel is informational on the current page; there is no visible alternate model picker.
The model is labeled as a full-scene audio model for higher-quality SFX and cinematic sound design.
Prompt
The prompt is the text description of the sound effect you want. The generate button is disabled until the prompt contains text.
The prompt box supports multiple lines. Press Shift + Enter for a line break, or Enter alone to generate.
Target Length
Target Length controls the requested duration of the generated sound.
- Minimum: 1 second
- Maximum: 120 seconds
- Default: 3 seconds
You can adjust the value with the number input or the slider. The value is a target, not an exact trim command. Generated audio may come back slightly longer or shorter than requested.
Variations
Variations controls how many versions of the same prompt to create in one batch.
Available options:
- 1 — generate a single sound effect
- 2 — generate two variations
- 3 — generate three variations
- 4 — generate four variations
When more than one variation is selected, generated sound names are automatically numbered.
Output format
Generated sounds are saved and downloaded as MP3.
Working with generated sounds
Completed sounds appear as cards in the central gallery. Each card includes the sound name, prompt, model label, duration when available, waveform preview, and action buttons.
Play and stop
Click Play on a completed card to preview it. While it is playing, the button changes to Stop.
Starting another sound stops the currently playing sound. Clicking Stop stops the current preview.
Waveform seeking
Each completed sound shows a waveform preview. Click anywhere on the waveform to begin playback from that position. During playback, the waveform shows progress with a moving play position.
Waveforms may take a moment to appear, especially when many sounds are visible. The card can still be played once the sound has completed.
Download a sound
Click the Download button on a sound card to save that individual sound as an MP3 file. The downloaded filename is based on the sound’s current name.
If a direct download cannot start, the tool opens the audio in a new browser tab so you can use your browser’s save controls.
Edit a sound
Click the sliders/edit button on a completed sound card to open it in the SFX Editor lightbox.
The editor opens over the current page. When you save from the editor, the edited audio replaces the version shown on the SFX Gen card. The waveform refreshes for the updated audio.
Close the editor with the close button in the top-right of the lightbox, or click outside the editor overlay.
Rename a sound
Click the sound’s name on its card to rename it.
- Press Enter to save the new name.
- Click away to save.
- Press Escape to cancel while editing.
Delete a sound
Click the trash button on a sound card to remove it from your library. Failed generations also show a Remove option.
Deletion is permanent for that saved sound entry.
Batch actions
When completed sounds are visible in the current view, SFX Gen offers batch tools above the gallery.
Download All
If more than one completed sound is visible, click Download All to download all completed sounds in the current filtered view.
The current view matters: if you are inside a project or using search, Download All applies to the sounds currently shown.
Select mode
Click Select to enter selection mode.
In selection mode:
- Click completed sound cards to select or deselect them.
- Use Select All to select all completed sounds in the current view.
- Click Download to download selected sounds.
- Click Delete to delete selected sounds.
- Click Cancel to leave selection mode.
Bulk deletion asks for confirmation and cannot be undone.
Projects and organization
SFX Gen includes project tabs at the top of the gallery. Projects help you group sounds by game, scene, level, character, UI set, trailer, or any other workflow.
All Sounds
All Sounds shows your full SFX library, regardless of project.
Dropping a sound onto All Sounds removes it from its project while keeping it in your overall library.
Create a project
Click the new project button beside the tabs. A new project is created and selected automatically. New projects are named automatically using a numbered project name, and you can rename them afterward.
Rename a project
Open the project tab, then click the rename pencil on the active tab.
- Press Enter to save.
- Click away to save if the name is not empty.
- Press Escape to cancel.
Move sounds between projects
Completed sounds can be dragged between tabs.
- Drag a completed sound card.
- Drop it onto a project tab to move it into that project.
- Drop it onto All Sounds to remove it from a project while keeping it in your main library.
Only completed sound cards are draggable.
Delete a project
Click the delete button on the active project tab. You will be asked what to do with the sounds in that project:
- Keep sounds (move to All Sounds) — deletes the project but keeps its sounds in your main library.
- Delete sounds too — permanently deletes the project and the sounds inside it.
- Cancel — closes the confirmation without changing anything.
Search and filtering
Use the search field above the gallery to filter visible sounds. Search matches sound names and prompt text.
If you are inside a project tab, search filters only that project’s visible sounds. Clear the search field to return to the full current view.
The status line above the gallery shows how many sounds are visible and how many are completed. If sounds are still being generated, it also shows a generating count.
Saving and signed-in behavior
Signed-in users have a persistent SFX Gen library. Your generated sounds, names, project assignments, and saved editor updates reload when you return to the page.
Signed-out users may see demo sounds, but generating new sound effects requires signing in. If you try to generate while signed out, SFX Gen prompts you to sign in.
Tips & troubleshooting
The generated sound is longer or shorter than the target
Target Length is a request, not an exact edit. Try regenerating with a clearer duration instruction in the prompt, such as “very short,” “one-second UI click,” “five-second ambience loop,” or “clean ending after three seconds.”
The result contains music, voice, or ambience I did not want
Add exclusion language to your prompt, such as “no music,” “no dialogue,” “no narration,” “isolated sound effect,” or “dry studio recording.”
A generation failed
The failed card displays an error message when available. Remove the failed card, revise the prompt if needed, and try again. Shorter, clearer prompts often work better for precise effects.
Download does not start
If the direct download fails, the tool attempts to open the audio in a new tab. From there, use your browser’s save controls.
The waveform is not visible immediately
Waveforms are prepared after completed sounds appear in view. If a waveform is still loading, wait a moment or scroll the card into view. You can still use the Play button once the sound has completed.
I cannot generate
Make sure you are signed in and that the prompt box contains text. The generate button remains disabled for an empty prompt.
My project looks empty
Check whether a search is active. Search filters the current project view, so a project can appear empty if no sounds match the search text. Clear the search field to show all sounds in the project.
FAQ
Can I generate multiple batches at once?
Yes. SFX Gen creates cards immediately and runs generation in the background, so you can start another batch without waiting for the previous one to finish.
What is the maximum length?
The maximum target length is 120 seconds.
What format do downloads use?
Downloads are MP3 files.
Can I organize sounds by game or scene?
Yes. Use project tabs to group sounds. You can drag completed sounds into projects and rename projects for your workflow.
Can I edit generated sounds?
Yes. Use the edit button on a completed sound card to open the sound in the SFX Editor. Saved edits update the sound in your SFX Gen library.
Can I generate while signed out?
No. Signed-out users may see demo content, but generating new sounds requires signing in.