Stereo Audio to Real Surround Sound โ Take Your Sound to the Next Level!
Get ready to rediscover your favorite music and movies! This extension turns flat stereo audio from any tab into a vibrant surround experience (2.1, 4.0, 4.1, 5.1, 7.1 and 7.2) or true 8D spatial sound with HRTF โ louder, clearer and perfectly balanced. The ultimate tool to get the most out of your speakers or headphones, and it's 100% free.
โ ๏ธ LIMITATIONS & IMPORTANT NOTES
๐บ Full Screen Mode: Chrome's tabCapture API has security restrictions that block standard fullscreen while capturing. Press F11 to force fullscreen.
๐๏ธ Per-Tab Permission: Chrome requires you to enable each tab by clicking the extension icon on it (or press Alt+Shift+S).
ใฐ๏ธ Note for Optical Cable (SPDIF/Toslink) users: optical carries only 2 uncompressed channels, so your system reports stereo. Don't worry โ manually select 5.1, 7.1 or 7.2 and the extension generates the surround signal; your receiver handles the rest. Ignore the warning icon.
๐ HIGHLIGHTS
๐ 8D Virtual (HRTF) โ True binaural spatial sound that rotates around your head using real Head-Related Transfer Functions. Choose the path (Circular, Orbital, Pendulum) and rotation speed (2โ15 seconds per turn). Works on any hardware โ headphones strongly recommended for the full immersive experience.
๐๏ธ Cinematic Surround Engine โ An intelligent matrix keeps vocals up front while sending ambient sounds to the rears. Configurable ambiance depth, direct rear send, L/R rear inversion and adjustable delay buffer for that real theater feel.
๐ฃ๏ธ Dialogue Boost (New!) โ One slider lifts voices (center channel, or the L+R mid in systems without a center) so you never miss a line.
๐ Night Mode (New!) โ Evens out loud and quiet scenes so explosions don't wake the house and whispers stay audible. Perfect for late-night watching.
๐ง Crossfeed for Headphones (New!) โ Softens the harsh hard-panned stereo separation for a more natural, speaker-like listen on headphones.
๐ก๏ธ Limiter & Normalizer (New!) โ A per-channel limiter stops clipping and distortion, while the smart look-ahead AGC keeps ads and content at a consistent volume without harsh peaks.
๐ญ Audio Presets (now with your own!) โ Switch instantly between optimized setups: Cinema Action, Voice/Podcast, Music Stereo+, Gamingโฆ or save your own named presets and export/import them as a file. Your manual tweaks are preserved when you return to Default.
๐ Per-Site Memory (New!) โ Optionally remember and auto-apply your settings for each website (e.g. 5.1 + EQ on one site, plain stereo on another).
๐ Smart Global Mode (Set it and forget it!) โ Activate once and the extension follows your audio:
- ๐ต๏ธ Automatic detection of the active tab
- ๐ Seamless switching between YouTube, Spotify, etc.
- ๐ฆ Patient resume when you hit play again
- ๐ฏ "Always Active" option: capture starts automatically when you open the popup
๐ง Smart Mono Mix โ Detects when only one channel has audio (common in old recordings or bad uploads) and copies it to the other side automatically, with no action from you.
๐๏ธ 7-Band Graphic Equalizer โ Full control over bass, mids and highs with intuitive sliders, plus pre-amplification (0โ200%) to boost quiet sources.
๐๏ธ Free Channel Routing โ Reassign any input channel to any output. Send Center to LFE, swap surrounds, mute specific channels โ total flexibility.
๐ Live Audio Analysis (4 views + loudness) โ Switch between real-time logarithmic frequency spectrum, time-domain waveform, 7-band level meters and a 3D sound field, with live readouts of clipping, peak frequency, spectral centroid, dynamic range and LUFS loudness.
๐ Deep Bass & Clear Vocals โ Smart Subwoofer/Center separation with professional-grade Linkwitz-Riley filters. Customizable crossover (50โ500 Hz Center HPF, 80โ250 Hz Subwoofer LPF) with a built-in test mode to isolate each channel.
โก Performance Optimizations
- Auto Silence Bypass: pauses CPU-heavy processing when there's no audio
- Configurable Visualizer FPS (Auto/60/30/15)
- VU meter smoothing
- Lightweight AudioWorklet processing with near-zero garbage collection in the hot path
โจ๏ธ Keyboard Shortcuts (New!) โ Toggle the extension on the current tab (Alt+Shift+S) or open the popup (Alt+Shift+U). Both customizable in chrome://extensions/shortcuts.
๐จ Light & Dark Theme (New!) โ Follows your system automatically, or force light or dark.
โ๏ธ Sync Across Devices โ Sign in with your Google account and your settings travel with you to every Chrome installation.
๐ 24 Languages โ English, Spanish, French, German, Italian, Portuguese (BR/PT), Russian, Japanese, Chinese (Simplified/Traditional), Korean, Hindi, Arabic, Polish, Dutch, Turkish, Indonesian, Ukrainian, Swedish, Vietnamese, Czech, Thai and Hebrew.
โ๏ธ Automatic Configuration โ On install, the extension detects your hardware and selects the best system. You can always change it manually.
๐ Anonymous Statistics (Opt-Out) โ Helps improve the extension and show where it's being used on a live map. Only a coarse, city-level location (derived from your IP) is used โ never your audio, browsing or personal data. Disable it anytime in Settings.
๐ ABOUT DONATIONS: 100% free with all features unlocked. The "Donate" tab is completely optional.
๐ PERMISSIONS NOTE: "tabs" is used only to detect which tab is playing and active; "tabCapture" to process that tab's audio; "storage" to save your settings. We do NOT read, store or share your browsing history, and your audio NEVER leaves your browser.
๐ ๏ธ SUPPORT: Please use our Help Center before leaving a negative review:
๐ https://chromewebstore.google.com/detail/hpmbefgjnjkkdcgdbjplmdhiedhgknek/support
Positive reviews keep this project free. Thank you!
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