Spv 2 Side Panel Visualiz

Turn any music site into a studio-grade meter bridge.

No matter your scene — mainstream streaming, indie, DJ, or live coding — SPV-2 has you covered. Works out of the box on 10+ music sites including YouTube, Spotify, SoundCloud, Beatport, and Strudel.

Want to use SPV-2 on other sites? Enable "All websites" in Settings > Advanced.

🎵 What is SPV-2?
SPV-2 is a Chrome extension that analyzes audio in real time and displays multiple instrument-style visualizations in Chrome's side panel. No installs, no DAW, no tab switching — just click and see the sound.

🎛️ Features
• Oscilloscope — Waveform (W) and Lissajous (XY) modes with adjustable time/vertical scale and auto trigger
• Spectrum Analyzer — 32-band logarithmic FFT with peak hold, segmented LED or solid bar styles
• Chromagram — Polyphonic pitch class detection with piano-roll keyboard and Note Flow scrolling display
• BPM Detection — Spectral flux onset detection with autocorrelation tempo estimation
• Key Detection — Chroma-based key estimation with Camelot notation for DJs
• Track Info — Track title, channel name, BPM, and key in one glance
• 30+ Themes — Built-in palettes plus a curated set derived from Strudel's editor themes
• Customizable Layout — Show/hide any panel, minimize sections, adjust settings per module

🎨 Themes Built for Every Mood
SPV-2 ships with the original lineup — Default, Neon, Monochrome, Amber, Lemon, Phosphor, Ice, Sakura, Light and more — and adds a wide selection of palettes derived from the live-coding ecosystem (Dracula, Tokyo Night, Gruvbox, Nord, Solarized, and many more). Pick a look that matches your track, your stream, or your late-night listening session.

🟣 Live Coding & Algorave Friendly
SPV-2 plays nicely with browser-based live coding environments. When you capture a Strudel tab, SPV-2 can auto-sync its visualizer theme to Strudel's current editor theme — your spectrum, oscilloscope and chromagram instantly match the colors on stage. One toggle, zero setup.
If you're not a live coder, the new theme palettes alone make this update worth grabbing.

🔒 Zero Interference
SPV-2 never touches the page. No content scripts, no DOM injection, no ads, no tracking. Audio is captured via Chrome's tabCapture API and processed entirely within the extension.

🎧 Built for Music Listeners
Whether you're a DJ checking BPM and key during a live set, a producer analyzing frequency balance, a live coder watching your patterns light up the spectrum, or a curious listener who wants to see the music — SPV-2 gives you a studio-grade view without leaving your browser.

⚡ Technical Highlights
• Manifest V3 compliant
• Offscreen Document for audio processing
• 30 fps real-time rendering
• Automatic resource cleanup on panel close, tab close, or navigation away

🔑 Permissions Explained
• tabCapture: Required to capture audio from the active tab
• offscreen: Required for audio processing (Web Audio API)
• sidePanel: Required to display the visualizer
• storage: Required to save your settings and theme preference
• tabs / activeTab: Required to detect supported sites
• scripting: Required only on Strudel to read the editor's theme name from the page's localStorage when Auto-sync is enabled
• Host permissions: Required for each supported music site — SPV-2 only uses these to capture tab audio, no data is collected or sent

📋 What's New

### v1.3.0 — 2026-06-01
• Japanese and German localization added

### v1.2.0 — 2026-05-01
• Auto-sync with Strudel — When capturing a Strudel tab, SPV-2 can match its visualizer theme to Strudel's current editor theme automatically
• 30+ themes — A big jump in look-and-feel options, with new palettes derived from Strudel's editor themes (Dracula, Tokyo Night, Gruvbox, Nord, Solarized, and more)
• Theme picker reorganized — Built-in and Strudel-derived themes are grouped in the dropdown for easier browsing
• Light theme rendering — Tokyo Night Light, Solarized Light and other bright palettes now render with proper contrast
• Various polish and stability improvements

### v1.1.0 — 2026-04-10
• Multi-site support — works on 10+ music sites including YouTube, Spotify, SoundCloud, Beatport, and Strudel
• "All websites" mode — Enable in Settings > Advanced to use SPV-2 on any site with audio
• Oscilloscope V Scale — x0.5 / x1 / x2 / x4 vertical zoom for both Waveform and XY modes
• Bilingual confirmation modal before Chrome's permission dialog
• Spectrum analyzer frequency label fix (16k → 20k) and button width stability improvements

### v1.0.0 — 2026-04-07
• Initial Chrome Web Store release with oscilloscope, spectrum analyzer, chromagram, BPM/key detection, and 10 built-in themes