ASUS ZenPad 10 3S microphone not working.
The built-in microphone is not working properly. When using the device default app Sound Recorder, it appears to record voice audio but at a very very very low volume. I can barely hear the audio even when the volume is a maximum. However, it works properly when using a plug-in headphone set.
I'm unable to find a way to boost the microphone signal gain in any of the settings. The device is not damaged, rarely used and i don't recall dropping it ito have damaged the speaker.
I don't have other apps installed that could possibly interfere with the operation of microphone.