SoundSphere

Reliable per-tab volume boost and 10-band EQ for browser audio.

SoundSphere: per-tab volume booster and 10-band equalizer Boost quiet tabs up to 800%, shape the sound with Voice and Bass modes or a 10-band EQ, and see every tab that's playing audio. Each tab is controlled on its own, without touching your system volume, and all processing happens locally in your browser. NEW IN 1.3.1 • 100% with a flat EQ now sounds exactly like SoundSphere being off • Opening the popup no longer changes a tab's audio on its own • Fixed audio that could double up when moving the slider quickly • The audio engine shuts down when nothing is boosted, saving memory • Remembered tab volumes no longer carry over to unrelated tabs after a browser restart • Better screen reader and keyboard support KEY FEATURES • Volume from 0% to 800% per tab (600% max if you turn off overdrive) • A soft limiter keeps boosted audio from clipping harshly • Quick modes: Default, Voice (clearer speech), Bass (more low end) • 10-band EQ (31 Hz to 16 kHz) with presets: Flat, Rock, Pop, Hip-Hop, Jazz, Classical, Electronic, Vocal, Live Clean, Bass Boost, Treble Boost, V-Shape, plus your own custom setting • Keeps working when you switch tabs or windows • Works on any site that plays audio, including streaming services with protected playback such as Spotify • List of tabs playing audio with titles and icons; click one to jump to it • Optional toolbar badge showing how many tabs are playing • Remember volume per tab or use one global volume; option to start new tabs at 100% HOW IT WORKS 1. Open the SoundSphere popup on the tab you want to adjust. 2. Move the slider, pick a mode or set the EQ. SoundSphere then captures that tab's audio and processes it locally. Opening the popup alone changes nothing. If tab capture isn't available for a tab, SoundSphere controls the page's audio and video players directly instead; if a site blocks processing there, you get 0-100% volume and mute. Browser pages (such as chrome:// pages and the Chrome Web Store) can't be controlled. PERMISSIONS EXPLAINED • activeTab: works with the tab you open the popup on • tabCapture: captures that tab's audio so volume and EQ can be applied locally • offscreen: runs the hidden audio processor that Manifest V3 requires; it closes when no tab is being processed • tabs: finds tabs that are playing audio and shows their titles and icons • storage: saves your settings, EQ choices and volume preferences • Access to all websites ("Read and change all your data on all websites"): lets the fallback audio controller run on whichever site you use SoundSphere on. It only looks at the page's audio and video players; nothing from the page is stored or sent anywhere. PRIVACY • All audio processing happens on your device; audio is never recorded or saved • No analytics, tracking, ads or remote code • SoundSphere makes no network requests; settings stay in your browser's storage • Privacy policy: https://ripdzl.github.io/SoundSphere/privacy.html Also available for Firefox: https://addons.mozilla.org/en-US/firefox/addon/soundsphere/ SAFETY NOTE High boost levels can distort audio and may damage hearing or speakers. Start low, especially with headphones.