Device Selection Check

Confirm your call will use the right microphone, speaker, and camera - not a virtual camera like OBS, and not a device another app (Teams, Zoom) is holding - and check that your mic is not turned up so hot that it clips. Runs entirely in this browser; nothing is recorded or uploaded.

Read the Device Selection Check guide for help reading the verdict or fixing each failure mode.

Privacy: Your microphone and camera stay on this device. One permission grant reveals device names; the mic feeds only the on-screen level meter and is never recorded or transmitted. Every track is stopped and the audio context is closed the moment the check ends. Only device names and the mic level seen appear in the report - never any audio or video. View source to verify.

Configuration

Local checks via enumerateDevices + getUserMedia + Web Audio API

Takes about 20 seconds. The mic stays on this device; nothing is recorded or uploaded.

Status Check Step

Pending

Devices are visible

Click Start to allow access once, then see every mic, speaker, and camera by name.

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Pending

Devices are free (not held by another app)

Each microphone and camera is briefly probed to see if another app has it locked.

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Pending

Microphone level is healthy (not clipping)

Pick a mic and speak; the meter shows headroom and warns if the input is too hot.

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