Microphone present but silent - "tried (almost?) everything"

David Esp

Member
Macbook inbuilt system Microphone (the only microphone on my system) works ok in native macOS 10.15.7 (Catalina)...
But in Windows 10 latest on Parallels 16.5.1 VM (on MacOS), the sound level from it (e.g. in Windows' mic levels test) is zero.

What I have checked so far...
  • Mac and VM permissions are enabled,
  • Microphone is enabled
  • Mic levels in "Microphone Properties" are +20 dB boost and 96%
  • "High Definition Audio Device Properties" says "This device is working properly."
  • System Information reports no problem devices
  • Ran Windows' "microphone issues" test but none of its checked-for issues applied.
  • Reinstalled Parallels Tools (and restarted) - but that made no difference.
Any advice would be much appreciated
 
I had such a tragedy, it turned out that the contact in the wire itself had broken
Thanks for your suggestion Lily. That (sadly?) does not apply in my case as I am using my laptop's built-in microphone (for now) and it works fine on the host system (macOS Catalina).
But you're right in general - sometimes the problem requires lateral thought, and the answer can be in front of our eyes.
 
Solution found :) - though questions remain (as further below)

In Windows 10 (VM) screen, top-right-hand corner, I clicked the Config-gear
This opened: [Windows 10 Configuration]
In there, went to [Hardware > Sound & Camera > Microphone]
It was set to [Default]
I tried changing it to [Built-in Microphone]

Now it works!
...though it's not very sensitive
...I wonder of there's a "20 dB boost" option somewhere in the signal-chain?

Remaining question is: why didn't the [Default] setting work?
...as in why didn't it "default" to that very same microphone?
 
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