Sound Controller for Chrome

Boost any tab's volume past 100%, enhance dialogue/bass, or turn one down from a cross-tab mixer — works inside iframes too.

Chrome caps a tab's volume at 100%. Sound Controller breaks past that using the Web Audio API, and adds a mixer to control every tab's volume from one place. **Volume boosting up to 600%** (configurable), via a Web Audio GainNode. If a page already wired that same video into its own Web Audio graph, this extension quietly falls back to the native 0–100% volume for that element instead of breaking playback. **On-video overlay** A draggable control on every video/audio element: mute, −/+, a percentage readout you can click to reset, double-click to type an exact value, or drag to scrub. **Works inside iframes** — the overlay and boosting attach inside every frame on the page, including a cross-origin iframe. **Control every open tab from one popup** — the "All tabs" mixer lists every tab currently playing audio/video with a live slider and mute button, so you can turn down a noisy background tab (or a call, a video, a podcast) without switching to it. Click a row to jump straight to that tab. **Keyboard shortcuts**: [ and ] for volume down/up, 0 to reset, M to mute, N to hide the overlay. Fully remappable. **Remembers your volume per site**, and browser-level shortcuts at chrome://extensions/shortcuts for volume up/down/mute without focusing the page.