SVA

SVA is an unofficial, independent real-time audio visualizer that works with playback audio on the Suno website and displays visualization in a Chrome side panel. Designed for music creators and producers who want to monitor loudness, peaks, spectrum balance, and stereo characteristics in real time. Features: • LUFS measurement (Momentary, Short-Term, Integrated) — based on ITU-R BS.1770-4 • True Peak detection with peak hold • Loudness Range (LRA) and Dynamics • Frequency Spectrum (LO / MID / HI-MID / HI) • Goniometer (stereo phase visualization) with Correlation bar, histogram, and phase warning • Key detection — always-visible strip showing Key, candidates, and stability • BPM estimation and beat indicator • Panel copy — captures the side panel as a PNG to clipboard (⧉ button) • Loudness History graph • Session-based Snapshot comparison (up to 10) • Japanese / English tooltip support • PLAYER mode — per-track measurement • STUDIO mode — measures Suno Studio and Editor playback in real time as one continuous session, with a rolling Loudness History (10 s–10 min, pan/zoom, overview minimap) How to Use: 1. Open the Suno website in Chrome 2. Click the SVA icon to open the side panel 3. Play a track — audio visualization starts automatically 4. Use SNAPSHOT to temporarily save and compare measurements during the current session 5. To measure Suno Studio or the Editor, open it and switch the mode button to STUDIO (connects automatically) Privacy: • All audio processing is performed locally in the browser • Audio data is not recorded, uploaded, transmitted, or shared • Snapshots are stored in memory only and are cleared when the panel is closed • Only the UI language preference and a first-run guide flag are saved locally using localStorage • No personally identifiable information (PII) is collected • The copy button captures the panel display as a local PNG image and writes it to your clipboard. No image or metadata is transmitted externally. Notes: • Works with the Suno Player, Studio, and Editor. • After updating the extension, reload the Suno tab once before measuring. • Suno Studio is a Premier-plan, desktop-only feature (it will not appear if the browser window is too narrow). • This is an unofficial tool and is not affiliated with, endorsed by, or sponsored by Suno, Inc. • "Suno" is a trademark or registered trademark of Suno, Inc. Version History: v2.0.6 • Compatibility fix for Suno Studio URL change v2.0.5 • Fixed the panel copy button failing when AUTO snapshot was enabled v2.0.4 • Greatly reduced CPU and memory use while idle and during silence • The spectrum display now clears during silence v2.0.2 • Reduced measurement load for long STUDIO sessions • Changed the LRA display update interval v2.0.1 • Added a first-run guide • Panel language now defaults to your browser language • Removed bundled fonts for a smaller package • Improved stability for long STUDIO sessions v2.0.0 • NEW: Suno Studio & Editor support — switch between PLAYER and STUDIO with the mode button; STUDIO measures Studio/Editor playback as one continuous session • STUDIO Loudness History: rolling view (10 s–10 min), pan/zoom, overview minimap, True Peak detection • Error messages now shown in the panel; tidied header layout • Bug fixes: panel stuck on "loading" when no stream was found, and more v1.7.0 • Loudness History: vertical auto-range — on quiet tracks the lower bound expands automatically (down to −34 LUFS) so soft passages stay readable; normal and loud tracks look the same as before • Dynamic dB gridlines that adapt to the visible range v1.6.3 • Loudness History: hover to read out time / Short-Term / True Peak at the cursor position • AUTO snapshot is now enabled by default v1.6.2 • Loudness History now shows the current position (comet-style highlight) v1.6.1 • Rendering performance and efficiency improvements (lower CPU / battery use) v1.6.0 • Loudness History now defaults to Auto (continuously fits the whole track) • Off-scale (floor/ceiling) segments in Loudness History are color-coded • Fixed history graph and meters freezing during repeat playback • Rendering performance improvements v1.5.0 • Added ★ favorites for tracks and snapshots • Refined Loudness History scale and Metrics / snapshot card layout for readability • Improved LRA accuracy (energy-based relative gating) v1.4.2 • Fixed STOP button not working after auto-reconnect • Key display now clears immediately on STOP • Improved BPM detection (reduced double-tempo errors) v1.4.1 • Fixed measurement freeze during playback • Improved connection reliability on track/tab transitions v1.4.0 • Added sticky strip for always-visible Key, Stability, BPM, and Beat • Added SIMPLE/DETAIL button for Spectrum/Goniometer extended display • Improved connection stability v1.3.1 • Added time markers on Loudness History (up to 10) • Improved Goniometer display • Changed Correlation histogram to outline style v1.3.0 • Added Correlation histogram — shows stereo/mono trend accumulated over the current track • Added phase warning indicator — red line appears at the bottom of the Correlation bar if phase inversion is detected v1.2.9 • Added panel copy button (⧉) — copies the entire panel as a PNG to clipboard • Improved Correlation display: vertical bar overlaid on Goniometer canvas • Unified hover colors for header buttons v1.2.8 • Fixed stability issues when opening and closing the side panel rapidly • Improved reliability of analysis stop/start control v1.2.7 • Improved True Peak accuracy with 4x oversampling (ITU-R BS.1770-4 compliant) • Improved LRA accuracy with EBU R128 gating • Reduced CPU usage when side panel is not open • Fixed auto-reconnect after manual STOP • Fixed duplicate song-change events on long sessions v1.2.6 • CLR button now requires confirmation before clearing all snapshots • Memo input now appears as a title on the snapshot card • All tooltips unified with custom JP/EN tooltip system