HZ Detect - A4 Tuning Analyzer

🎵 Analyze Music Tuning in Real Time

HZ Detect is a professional-grade pitch analyzer that listens to your computer’s audio and instantly detects the A4 reference frequency — helping you determine whether a song is tuned to 432 Hz, 440 Hz, 444 Hz, or any custom pitch standard.

Ideal for musicians, producers, sound engineers, and frequency enthusiasts, HZ Detect brings studio-level pitch analysis right into your browser.

⚙️ How It Works
🧠 Uses advanced frequency analysis (YIN algorithm) to detect fundamental pitch in real time.
🎧 Works with any browser tab or system audio — simply select your source and press Start.

📊 Displays:
Current note name & frequency (e.g., A4 = 440 Hz)
Flat / Sharp meter in cents (±50)
Real-time waveform tuning accuracy

Estimated A4 tuning reference after sampling
🟢 Auto-detects whether music is tuned to 432 Hz, 440 Hz, 444 Hz, or other A4 standards.

🚀 Why Musicians Love It
✅ Accurate A4 detection — verify if your music is truly 432 Hz-tuned
🎶 Real-time visual tuning meter — instantly see pitch drift and sharpness
🧩 No external apps or DAWs required — runs directly in Chrome
🎛️ System-wide listening — detect frequencies from YouTube, Spotify Web, Apple Music, or any streaming tab
🌐 Works offline once installed (no internet required after setup)

🧩 Perfect For
Music producers verifying pitch reference before mastering
Sound therapists validating Solfeggio-tuned recordings (e.g., 528 Hz, 396 Hz)
Audiophiles comparing 432 Hz vs 440 Hz tracks
Instrument tuners checking accurate concert pitch
Anyone exploring sound frequency and tuning awareness

🛠️ Key Features Summary
🎚️ Detects A4 tuning from 390–470 Hz range
⚡ Lightweight & fast (Web Audio API + JS YIN algorithm)
🔒 Private — all analysis happens locally in your browser
🖥️ Chrome Extension — no installation of extra software
🎨 Beautiful dark-mode UI for modern workflow