S&R Extension

S&R Extension adds quick remix controls to media playing in your browser. Slow a track down, add reverb, boost low end, preserve or shift pitch, and save your favorite settings as presets.

Features

• Playback speed control from 0.5x to 1.5x.
• Reverb mix control.
• Bass boost control.
• Pitch preservation toggle.
• Built-in Slowed+Reverb, Nightcore, and Clean presets.
• Custom presets and saved defaults.
• Global on/off toggle that leaves your settings untouched.
• Keyboard-accessible sliders and buttons.
• Support for normal page media, Shadow DOM media, frames, and Spotify's hidden WebAudio playback path.

Install From Source

1. Download or clone this repository.
2. Open chrome://extensions in Chrome or another Chromium-based browser.
3. Turn on Developer mode.
4. Click Load unpacked.
5. Select the folder that contains manifest.json.

After updating the files, reload the extension from chrome://extensions.

How To Use

1. Open a page with audio or video.
2. Open the S&R Extension popup.
3. Choose a preset or adjust the controls manually.
4. Use Save under Defaults to reuse your current settings later.
5. Use the Extension toggle to turn effects off without losing your settings.

Spotify Notes

Spotify uses a hidden WebAudio player, so the extension installs an early Spotify-specific media hook. If Spotify was already open before the extension loaded, the popup may refresh the Spotify tab once so playback can be detected correctly.

If Spotify does not respond after an extension update, reload the extension, close the Spotify tab, and open Spotify again.

Permissions

The extension asks for:

• activeTab: apply controls to the tab you opened the popup from.
• scripting: inject the media controller into the active tab.
• storage: save activation state, defaults, and custom presets.

Privacy

S&R Extension does not send analytics, browsing history, media URLs, cookies, or tokens to any external service. Settings are stored through browser extension storage.

License

S&R Extension is open source under the MIT License. See LICENSE for details.

Limitations

Some sites block audio capture features, which can limit reverb or bass boost. Speed and pitch controls may still work on those pages. If the popup says no compatible media was found, refresh the page and reopen the extension.