Speaker Test

Start with comfortable system volume. A browser tone can verify channel routing but cannot calibrate loudness, hearing, distortion or frequency response.

Frequency

Volume

440 HzTone frequency

24%Web Audio gain range

—Current channel

SineTest waveform

ReadyEach test is a short browser-generated tone. Keep your system volume comfortable; this page cannot calibrate speaker loudness, frequency response, or hearing sensitivity.

Test microphone Analyze audio Check devices

What the browser can measure

Start with a functional check, measure only what the browser can actually expose, then retest after one change.

ConnectChoose the actual browser-visible device or grant permission when required.

TestConfirm basic signal, input, output, preview or display behavior.

MeasureUse browser-exposed levels, timing, resolution, FPS, axes or event data.

DiagnoseCompare the symptom with the specific diagnostic instead of relying on one number.

RetestRepeat after changing the device, cable, permission, browser or system setting.

Pre-call Mic Webcam Keyboard Mouse Gamepad Display Permissions

Browser boundary
These tools observe browser APIs and local media/event streams. They cannot certify hardware condition, bypass denied permissions, or expose measurements the browser/OS does not provide.

What this tool checks

Play short browser-generated left, right or stereo tones at a conservative page-level gain for channel checks.

How to use the result

Start with comfortable system volume. A browser tone can verify channel routing but cannot calibrate loudness, hearing, distortion or frequency response.

Privacy & browser limits

Device streams and input events used by this page are handled in your browser unless the page explicitly says otherwise. Permission, label, timing and hardware-field availability depend on the browser and operating system.

Generated channel tones do not become an acoustic calibration test

Web Audio can verify that left/right/both test tones are routed by the browser/system. It cannot measure SPL, frequency response, distortion or guarantee which physical output device is active.

Use this result with confidence

Channel separation confirms routing, not room calibration

Playing a left-only or right-only tone is useful for checking whether channels are connected and labeled correctly. It does not measure speaker frequency response, room reflections, phase alignment, or absolute sound-pressure level. Use measurement microphones and calibrated test procedures when the task is acoustic calibration rather than a basic routing check.

Start at a low volume before changing frequency

A browser tone generator can produce sustained sine waves that are uncomfortable or unexpectedly loud through some headphones, amplifiers, or powered speakers. Begin with a low device volume and a moderate test level, then increase only as needed. Stop immediately if the sound is uncomfortable. The visual slider is not a calibrated dB SPL measurement.

Frequency-dependent loudness can come from several parts of the chain

A tone that seems quieter at one frequency can reflect the speaker, headphones, room, hearing sensitivity, operating-system processing, amplifier, or browser output path. Compare channels at the same settings before attributing a difference to hardware. For diagnosis, swap channels or devices to see whether the perceived problem follows the speaker or the signal path.

Use speech or music after the synthetic-tone check

Sine tones are good for basic channel and frequency spot checks, but real content contains many frequencies and transients at once. After confirming left/right routing, play familiar speech or music through the intended application. That second check can reveal distortion, intermittent connections, balance problems, or processing that a short single-frequency tone does not expose.