Measure your audio output latency, test speakers with tones, watch a live microphone level meter and waveform, and check your input/output devices — useful for calls, streaming and rhythm games.
Output & latency
audio not started
Latency is the browser's estimate of the delay before sound reaches your speakers — the lower the better for rhythm games and live monitoring.
Sample rate
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Base latency
—
Output latency
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Total est.
—
Microphone
not enabled
Grant mic access, then speak — the meter and waveform react to your input. Nothing is recorded or uploaded.
Level (RMS)
—
Peak
—
Clipping
no
Input rate
—
Channels
—
Devices
—
Full device names appear after you grant microphone access (a browser privacy rule).