What to do
Start capture and make a sound near one side at a time. Compare the left and right signal levels.
Microphone Channel Check
Check mono or stereo microphone channel levels and balance.
Left ChannelUnavailable
Right ChannelUnavailable
Start the microphone to inspect its channels.
Local history
Save a result to keep it in this browser. History holds your five most recent saved results for this test.
No saved results yet.
How to use this test
What to look for
Mono input can report one channel. A two-channel stream can contain a duplicate signal.
Web Audio analyzes the microphone signal after you grant access. dBFS describes digital signal level; it is not calibrated sound pressure in dB SPL. Gain, noise suppression, distance, and room noise affect readings.