Play local left/right tones, run a frequency sweep, check phase, and use the sync beep to check speakers, headphones, Bluetooth output, and balance before a call or recording.
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Speaker controls
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Start low, especially with headphones; steady tones can sound sharper than speech.
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Speaker syncWaiting
Left, right, sweep, and phase
The most useful speaker test is simple: play left, play right, then play both. If the left and right buttons sound reversed, check headphone orientation, cable seating, audio interface routing, or operating-system balance settings.
Use the frequency sweep to listen for sudden dropouts, buzzing, or rattles. Use the phase check to hear a centered tone followed by a thinner hollow tone; if normal audio sounds hollow, speakers or wiring may be out of phase. All tones are generated locally with Web Audio.
Safe volume first
Start at a low volume, especially with headphones. A test tone can feel louder than speech because it is steady and focused at one frequency. Raise the volume only after you know the output path is correct.
Bluetooth headphones can take a moment to wake up or switch modes. If the first tone is silent, wait a second, check the output device in your operating system, and try again.
Output selection
Some Chromium browsers expose output-device selection to web pages. When that feature is available, MicAndCam shows an output picker. In other browsers, choose the speaker or headphones in your operating system instead.
For meeting apps, test the same output device inside the app as well. A system-level speaker can work while an app is still set to a disconnected headset.
Put the headphones on at low volume, play left, play right, then both. Then try the frequency sweep gently. If the channels are reversed, check the orientation or the device balance setting.
What is the frequency sweep for?
It plays a rising tone so you can hear dropouts, buzzes, rattles, or unusually weak low or high frequencies. Start quietly, especially with headphones.
What is the phase check for?
It plays a centered low tone and then an out-of-phase version. The out-of-phase part should sound thinner or wider; if normal audio sounds like that, check speaker wiring or audio routing.
Why can't I hear the speaker test?
Check system volume, the selected output device, Bluetooth connection state, browser tab mute, and the physical volume on speakers or headphones.
Can I choose a different output device?
Only in browsers that support output-device selection for web audio. If the picker is hidden, change output in your operating system.
Is the speaker tone uploaded or streamed?
No. The tone is generated locally by the browser.
Why is the first Bluetooth tone silent?
Bluetooth headphones and speakers can take a moment to wake or switch audio profiles. Wait a second, confirm the device is selected in your operating system, and play the tone again.
Can I test phone speakers?
Yes. Open the speaker test in a mobile browser and use the Both button first at low volume. Some phones route audio differently when silent mode, Bluetooth, or a call mode is active.
How do I check left and right balance?
Play Left, then Right, then Both. If one side is quieter, check operating-system balance settings, the headphone cable, audio interface routing, or the app output device.
Why is the output picker missing?
Only some Chromium browsers expose output-device selection to web pages. If the picker is hidden, choose the speaker, headphones, or Bluetooth device in your operating system.