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Speak and watch the bar move: if it does, your microphone works and the right input is selected. The level meter analyses audio locally in your browser — nothing is recorded, stored or sent anywhere. A device switcher appears when you have multiple mics, which is where most "my mic doesn't work" problems actually live: the wrong input being selected.
Frequently asked questions
The bar doesn't move when I speak — what now?
Work down the chain: is the right microphone selected (here and in system sound settings)? Is the mic muted in hardware (many headsets have a physical mute)? Does another app have exclusive control? Testing in two apps separates a broken mic from a misconfigured one.
What level should the meter reach?
Normal speech should move the bar visibly past the first quarter without pinning it. Constantly maxed means lower the input gain (you'll distort on calls); barely moving means raise it or get closer.
Is my voice recorded during the test?
No — the audio stream feeds a local level calculation and is discarded in real time. Nothing leaves your device, and the mic releases when you stop the test or leave the page.