HZ Detect - A4 Tuning Analyzer

Analyze A4 tuning & pitch from a browser tab or system audio.

🎵 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