SFX Studio
Audio Expansion. SFX Studio is part of Chat Video Pro’s Audio Expansion. It is included with the Creator Bundle and Creator Pass, and available as a DLC add-on for Base. Generations bill to your own fal.ai account at wholesale rates — same as the rest of Studio.
SFX Studio is the sound-design card in the Audio department. Two modes: Text (describe a sound and generate it) and Foley (attach a video clip and generate synced sound design for what is on screen).
When to Use SFX Studio
Custom hits and atmospheres — whooshes, impacts, UI clicks, room tone, creature vocals — without digging through SFX libraries
Picture-locked Foley — generate sound that follows a clip you already cut
Quick variants — try several takes of the same prompt before you commit to the timeline
Stay in Premiere — generate, Add to Chat, and Place on timeline from one panel
SFX Studio ships Text and Foley in this release. Performance / live-transform modes and automated SFX spotting are not available yet — do not expect those tabs.
Getting Started
Step 1: Open SFX Studio
Open Chat Video Pro (Window → Extensions → Chat Video Pro)
Click Studio → Audio department
Click the SFX Studio card
Toggle Text or Foley at the top of the workflow.
Mode: Text
Best when you can describe the sound you need.
Step 2: Prompt — Describe your sound
Write a concrete sound description (what happens, material, space, intensity).
Prompt length is capped around 300 characters — keep it specific, not essay-length.
Optional: use AI Optimize to sharpen the wording, then Continue.
Example prompts:
“Heavy wooden door slam in a stone hallway, short reverb tail”
“Soft cloth rustle as someone sits on a leather couch, close mic”
“Futuristic UI confirm beep, clean and short”
Step 3: Model & settings → Generate SFX
Pick a model and duration, then click Generate SFX.
ElevenLabs SFX v2
General SFX, default pick
Up to about 22 seconds
CassetteAI SFX
Fast / alternate character
Up to about 30 seconds
Stable Audio 3
Longer atmospheres and beds
Up to about 120 seconds
You can request multiple variants in one run when the UI offers a variants control — audition each pill before placing.
Step 4: Result
Preview each take
Add to Chat
Place on timeline — inserts at the playhead on a free audio track
Try Again
Mode: Foley
Best when the sound must follow a video clip.
Step 2: Attach a clip — Foley from video
The empty state opens the loader titled Foley from video:
Upload — video from disk
Recent — a recent Chat Video Pro video
Import Clip — selected clip from the active Premiere timeline (preferred when you want sync placement back under that clip)
Max clip length: 60 seconds. Trim longer selects before attaching.
After attach, you’ll see a clip preview. Optionally add a short prompt to steer materials or intensity (some Foley engines require a non-empty prompt — leave a simple ambient note if you’re unsure).
Step 3: Model → Generate Foley
HunyuanVideo-Foley
Higher-quality picture-aware Foley (default)
ThinkSound
Faster Foley passes
Click Generate Foley (shows Preparing… while the clip is prepared and uploaded).
Step 4: Result
Preview the Foley audio
Add to Chat
Place on timeline — under the source clip when you used Import Clip; otherwise at the playhead
When Import Clip was used, you may also see Place at playhead if you want the override
Try Again
Tips for Best Results
Describe physical events, not abstract moods (“glass shatter on tile” beats “dramatic sound”).
For Foley, use Import Clip when placement under the source shot matters.
Keep Foley selects under a minute; shorter clips score more reliably.
Generate two or three Text variants before you commit — first takes are often “close but not cut.”
Place on a free track, then duck or EQ against dialogue in Premiere.
Troubleshooting
Generate disabled / preparing forever
Clip over 60s (Foley), empty prompt when required, or fal.ai key/balance issue
Foley feels unsynced
Re-attach a cleaner select; try the other Foley model; Place under Import Clip source
Place lands at playhead unexpectedly
Use Import Clip so timeline start is captured, or use Place at playhead intentionally
Text result too long / too short
Pick a model whose duration range matches the hit you need
See also
Music Composer — instrumentals, songs, and Score a video
Stem Separation — isolate vocals and instruments from a finished track
Voiceover Lab — dialogue and narration
Pricing FAQ — Audio Expansion entitlement
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