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Signal Lab
Real-Time Audio Analyzer
MusicRuns in your browserBuy Once · Own Forever
About
A real-time audio analyzer that turns your device into a professional measurement tool.
FFT spectrum from 20 Hz to 20 kHz, SPL meter, built-in pink noise generator, RT60 room decay measurement.
See your audio, not just hear it.
What's Included
- ✓Real-time FFT spectrum analyzer from 20 Hz to 20 kHz
- ✓SPL meter with peak hold and A-weighting
- ✓Built-in pink noise and sine wave generator
- ✦1/3-octave resolution, calibration presets, and RT60 room decay measurement.
Everything above is included in a single one-time purchase. No subscription. No in-app purchases. No feature gating.
Pricing
In your browser
Free
The full tool, not a trial. No account, no time limit, nothing leaves your device.
Tidemill Pro · optional
$12 once
Encrypted backup and restore across all 33 tools. One payment, no subscription.
Pro only adds backup. Nothing that is free today will move behind it. What Pro includes →
Get It
🌐Free · full toolTry Web Version →
Full tool — runs entirely in your browser. No account, no install.
Native iOS and Android builds are planned. The web version above is the complete tool today. Questions? Support →
Privacy
- ◆No account required — open the app and use it
- ◆No internet connection needed — fully offline
- ◆All data AES-256 encrypted on your device
- ◆Microphone used only while the app is active — never in background
App Info
Keywords
rtaspectrum analyzeraudiofrequencyfftroom acoustics
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