There can be several reasons why your audio is working but not your microphone.
Firstly, ensure that your microphone is properly connected to your device. Make sure that the cables are securely plugged in and the microphone is switched on if it has a separate power source.
Secondly, check your system settings to make sure that your microphone is selected as the default input device. On a Windows PC, this can be found in the Sound settings. On a Mac, this can be located in the System Preferences under the Sound section.
Thirdly, check if your microphone is muted. Some devices have a built-in microphone mute button or switch, while others may have the mute function in software.
Fourthly, confirm that your microphone is not damaged. Check for any visible physical damage or wear and tear. Also, try to use your microphone on a different device to ensure it is functioning correctly.
Finally, if none of the above solutions work, you may need to update your device drivers or perform a system update. You can also contact your device manufacturer or a technical support team for further assistance.