Mic & Webcam Test
Check your microphone, camera and speakers before the big call — level meter, waveform, resolution readout and stereo tones, all on your device.
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Play Left then Right — each tone should come from only that side. If both sound centred, check your balance settings or cable.
Test report
Troubleshooting
No permission prompt appears
Your browser may have remembered a “Block” choice. Click the camera/mic icon in the address bar (or the padlock) and set both to Allow, then reload. On Windows, also check Settings → Privacy → Camera/Microphone.
The mic meter doesn’t move
Pick the right device in the dropdown (laptops often list several). Check the physical mute switch/key, and make sure another app (Zoom, Teams) isn’t holding the mic exclusively.
The camera preview is black
Close other apps using the camera, check the privacy shutter/slider many laptops have, and try a different resolution. External webcams may need replugging.
I hear nothing in the speaker test
Raise the volume slider here and the system volume, check the output device in your OS sound settings, and unmute. Bluetooth headsets sometimes switch to a low-quality mode when the mic is in use — stop the mic test first.
Left/right are swapped
Your headphones may be on backwards (seriously — check the L/R markings), or the audio jack/adapter is miswired. Some OSes also offer a channel-swap accessibility setting.