Try a different headset to rule out a faulty microphone. For Nintendo Switch Pro Controller or third-party accessories, verify that the connector is clean and not damaged.
Adjusting Switch Mic Input Level Settings for Clear Audio
If the microphone gain is turned too low, your voice might be too quiet for the system to register, effectively rendering it silent. If you are using a headset with a microphone, the system needs to recognize that the audio is coming from the external device and not the built-in Joy-Con mic.
Navigating System Settings Software settings are often the invisible barrier between your voice and the other players. This issue is more common than you might think, often stemming from simple settings or connection glitches rather than a hardware defect.
Adjusting Switch Mic Input Level Settings for Clear Audio
Additionally, ensure that the correct input source is selected. Switching the input source ensures the data path is directed to the right hardware component.
More About Microphone not working on switch
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