by Blace Plugins·Audio
Images © Blace Plugins. Used for product review; image policy.
Sound Prompter earns its place in the toolfarm library by keeping audio generation on your own machine and handling any footage type, from live-action to 3D renders and AI clips.
Sound Prompter generates sound effects and music as .wav files from the layers in your composition, with the AI running locally on your machine. It analyzes your clip and creates sound effects, and optionally music, within a few seconds. The generated audio is synced to your video's content and works on real-world footage, 3D renderings, motion design work and AI-generated clips.
Setup starts by applying the effect to the layer you want the SFX for. That can be a subcomp or an adjustment layer, letting multiple layers participate in the sound creation. Add a Text Input to place a mask linked to the Positive Prompt field, then rename the mask to change the prompt. A second Text Input linked to the Negative Prompt suppresses certain keywords, such as music.
Click Generate Audio to run it. The first invocation can take up to a minute while the AI model loads and the frames render, after which you can iterate with different prompts and settings much faster. The finished .wav file is added to your project and placed on the timeline above the effect layer.
Sound Prompter is best for editors and motion artists who want to generate synced sound effects or music for their footage directly inside After Effects or Premiere Pro.
Sound Prompter is completely free to download and use.
Sound Prompter runs in After Effects 2026, 2025 and 2024, and in Premiere Pro 2026 and 2025. If you work across both hosts on a recent installation, the plugin fits into that setup. Anything older than the listed versions isn't covered, so check your host version before installing. For the most current compatibility details and any changes beyond this range, the developer's page is the place to confirm before you commit to a project.
Sound Prompter is set up by applying the effect to the layer you want sound for, which can be a subcomp or an adjustment layer so multiple layers participate in the SFX creation. Click Add Text Input to add a mask and link it in the Positive Prompt field, then rename the mask to change the prompt. Add another Text Input linked to the Negative Prompt to suppress certain keywords, such as music. Then click Generate Audio to create the file.
Sound Prompter may take up to a minute on the first Generate Audio invocation, since the AI model needs to load and the video frames have to be rendered. Once that initialization is done, you can iterate on the same clip with different prompts and settings much faster. The AI analyzes your clip and creates sound effects, and optionally music, within a few seconds after that first run. The generated audio is synced to your video's content.
Sound Prompter is listed as free in this catalog. Beyond that, licensing specifics can change, so the developer's page is the best place to confirm current terms before you rely on it. One detail worth knowing: the unregistered version of the plugin adds gaps and beep sounds to the generated .wav file, so a registered copy is needed for clean output. Check the developer's page for how registration and licensing work.
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