I recently encountered an issue where my microphone has stopped working properly after my PC was idle for about five minutes. I've tried several troubleshooting steps, including unplugging and re-plugging the mic, reinstalling drivers, and even uninstalling the Realtek software. However, I'm noticing that while the mic seems to be functioning, it's only capturing sounds from the computer itself, like those from YouTube or other system noises, and it doesn't pick up my voice at all. I've made sure that Stereo Mix is disabled, but the problem is still there. I'm really frustrated and would love any advice on what might be going wrong. Could this be a driver problem, a Windows issue, or something related to the hardware?
2 Answers
It sounds like Windows might have switched your input to a loopback device instead of your actual microphone. To check this, press Win + R and type 'mmsys.cpl' to open the sound settings. Go to the Recording tab and see which device reacts when you speak. If you notice that "Stereo Mix" or a similar option is picking up sound instead of your mic, make sure to set your real microphone as the default device and the default communication device too. Also, check the mic properties to ensure it’s not muted and that the volume is turned up. Don't forget to go into the Privacy settings to enable access for desktop apps. If you're using Realtek, check the audio console to ensure the jack is set to 'Mic In' and not 'Line In'. Usually, this type of issue is due to routing rather than a hardware malfunction.

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