Audio
FFT spectrum analyzer
Live spectrum from your microphone — FFT or 1/3-octave RTA, peak hold, configurable resolution.
Point your laptop mic at a speaker and see what's actually coming out. Switch between fine FFT bins (great for spotting hum and resonance) and 31-band RTA view (industry standard for room EQ). Peak-hold paints a coral line at the recent maximum. Pinch / drag / scroll to zoom the visible range. Audio never leaves your browser — we connect mic → analyser only, nothing is recorded or uploaded.
mic off — press start to listen
View
Style
settings
Grant mic access to see your input devices.
Smoothing50%
Peak hold30 dB/s
how to use
- ▸ Use RTA mode for room EQ — match the curve to your target by ear or with a reference mic. Each band is the power sum of its FFT bins; grey bands are narrower than one bin at the current resolution.
- ▸ Use FFT mode to find specific resonances, hum frequencies (50 / 60 Hz), or distortion artifacts.
- ▸ The browser's mic chain is not calibrated. Treat this as relative, not absolute SPL.
- ▸ No audio leaves your browser. We connect mic → analyser only; nothing is recorded or uploaded.