Audio Tests

Check that your browser detects your microphone and responds to sound, with a live level meter, waveform and spectrum.

Play a safe test tone after you click, confirm you can hear it, and choose an output device where supported.

Generate a precise 20 Hz–20 kHz tone with selectable waveform and a safe default volume. Never starts automatically.

Play separate left, center and right tones to confirm channel wiring and stereo balance.

Left/right, balance and tone samples for headphones. A subjective listening check — not a hardware certification.

Step through frequencies to explore what you can hear. A subjective, non-medical check under your control.

Record a short clip locally with MediaRecorder, play it back and download it. Nothing is uploaded.

See a real-time FFT frequency spectrum of your microphone input, with adjustable FFT size, smoothing and peak hold.

Play controlled 20–200 Hz low-frequency tones to check how low your speakers or subwoofer reproduce cleanly.

Estimate your microphone’s relative noise floor by recording five seconds of silence. Shown as amplitude, never calibrated dB SPL.

Detect input peaks that reach full scale (clipping), with a peak-hold meter and clipping counter.

Adjust an audio click against a visual flash until they feel in sync — a subjective audiovisual synchronization check.

Logarithmic sweep between two frequencies with a safe-volume warning and visual progress.

Accurate Web Audio metronome with BPM, tap tempo, accents and a visual pulse.