Tone Generator Frequency 440.00 oscillations / second (Hz) Enter frequency (20–20000 Hz) A4 440 C5 523.25 Volume MuteMax Waveform Sine (pure) Square Sawtooth Triangle Power Tip: drag the knob up/down or left/right, use your mouse wheel, or the ← → keys for fine steps. Audio is off until you press “Power” (required by your browser’s autoplay policy).
