Sound Prompter is an After Effects and Premiere Pro plugin that creates .wav sound effects and optional music from composition layers using locally‑run AI, syncing audio to video content.
Developed by Blace Plugins.
About Sound Prompter
Sound Prompter generates sound effects and optional music as .wav files directly from layers in After Effects or Premiere Pro projects. The AI model runs locally on the user’s machine, analyzing video frames and producing synced audio within seconds after initial loading. Users apply the effect to a sub‑composition or adjustment layer, add Text Input masks for Positive and Negative Prompts, and click Generate Audio. The first run may take up to a minute while the model loads; subsequent iterations are much faster. Generated audio files are added to the project timeline and saved on disk. The plugin works with live‑action footage, 3D renders, motion‑design compositions, and AI‑generated clips. Version 1.2.59 supports After Effects 2024‑2026 and Premiere Pro 2025‑2026.
Features
- Generates sound effects and optionally music from composition layers using AI
- Runs locally on your machine
- Generated sound effects synced to the video’s content
- Outputs .wav files added to your project and stored on disk
- Works on real-world footage, 3D renderings, motion design and AI-generated clips
- Positive and Negative Prompt inputs via linked masks to shape or suppress keywords
- Applies to a subcomp or adjustment layer so multiple layers contribute to the SFX
Best for
Editors and motion designers who need quickly synced sound effects or music without leaving After Effects or Premiere Pro.
Frequently asked questions
Which After Effects and Premiere Pro versions does Sound Prompter support?
Sound Prompter runs in After Effects 2024, 2025, and 2026, and in Premiere Pro 2025 and 2026. Versions older than those are not supported.
How do I set up Sound Prompter to generate audio?
Apply the Sound Prompter effect to the target layer (a sub‑comp or adjustment layer), add a Text Input mask linked to the Positive Prompt field, optionally add a second Text Input for the Negative Prompt, then press Generate Audio.
Why does the first Generate Audio run take longer?
The first Generate Audio call can take up to a minute because the AI model must load into memory and the video frames are rendered; after this initialization, subsequent generations are much faster.
Is Sound Prompter free to use?
The catalog lists Sound Prompter as free, but the unregistered version inserts gaps and beep sounds into the output, requiring registration for clean files. Licensing details should be confirmed on the developer’s site.
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