BeogradPC
Ready
Tone Generator
1000
Hz
Click the large frequency display to type a value. Audio is generated locally by Web Audio.
20Hz 20kHz
1000 Hz
B5 +9¢
sine
Center
50%
Ready. Press Play for a steady tone, or Sweep for a 20 Hz → 20 kHz test.

Stereo A/B test

Help — Tone Generator

Play starts a steady oscillator at the selected frequency. Click the large frequency number to enter an exact value from 20 to 20000 Hz. The Note card shows the nearest equal-tempered note (e.g. A4) plus cents deviation.

Keyboard shortcuts: P/Space play/stop · S sweep · R reset · M mute · A A/B test · 1–6 waveform · F fullscreen · H toggle side controls · V view (waveform/spectrum) · ? help · Esc stop / close dialog.

Privacy: audio is generated locally with the Web Audio API. CSP connect-src 'none' blocks any network access. Settings persist in localStorage under the tonetest: prefix.