Run the check
Record the same phrase at normal distance and current gain.
Lower input gain one step and repeat without changing vocal effort.
Compare the waveform or audible distortion in both local samples.
Read the result
Distortion reduced by lower gain supports an overloaded input stage.
Limits and next step
A browser sample may already have automatic gain applied.
Repeat the check after changing one setting or connection. Keep a record of what changed before deciding whether the device needs service.