Sound Plug separates vocals and background music from any browser tab using on-device AI. Nothing is uploaded. Everything runs locally.
Getting started
How it works
01
Open any tab
Navigate to a page with audio playing — a song, video, podcast.
02
Click Sound Plug
The extension captures your tab's audio and loads the AI model on first use.
03
Adjust the sliders
🗣️ controls vocals. 🎶 controls background. Drag either to zero to mute it.
FAQ
Common questions
Sound Plug uses a large AI model (~200MB) that runs entirely in your browser. It downloads once on first use and is cached locally — every session after that is instant.
No. Everything runs on your device. Your audio never leaves your browser. The only external request Sound Plug makes is downloading the AI model from Hugging Face on first install.
AI separation requires processing audio in ~7 second chunks. This creates an inherent latency of a few seconds. This is a property of the model, not a bug.
Sound Plug works on any tab playing audio — YouTube, SoundCloud, Spotify Web, podcasts, and more. Some sites with DRM-protected audio (like Netflix) may not be supported.
The green AI badge appears once the model has fully loaded. If it never appears, your connection may have interrupted the download. Close the popup, reopen it, and try again. If the issue persists, contact support.
Sound Plug uses WebAssembly with SIMD acceleration and works on most modern CPUs. On older machines, model loading may take longer and performance may vary.
Changelog
Version history
v0.3
Jun 2026
Permissions fix
Removed unnecessary broad tabs permission. Extension now requests only activeTab, in line with Chrome's narrowest-permissions policy.
v0.2
May 2026
AI separation + projection filter
Switched to htdemucs_ft_vocals ONNX model. Added projection filter to remove music bleed from vocal stem. Fixed background stem distortion caused by amplification bug.
v0.1
May 2026
Initial beta release
Mid/side processing, tab audio capture, vocal and background sliders, model caching via Cache API.
Support