I recently bought an L930 that came with W8.1 and I tested the 4 mics and they were running, so I upgraded to Windows 10 14393.448 Official Version Live-Voice and the audio recording in WhatsApp stopped running. This is not hardware, but software !!
I researched hard and saw that the Lumias 950 / 950XL also have the same 4 microphones and some of them are also having problems with those microphones.
I've tried everything, soft-reset, hard-reset, without backing up ....
I found an App in the official store that makes recording using the 4 microphones of the L930 / 950> Sound Recorder Hi-Res - https: //www.microsoft.com/en-u ...
I used this App> "www.microsoft.com/pt-br/store/p/sysapp-pusher/9wzdncrfhvls" to check if there was an audio / microphone driver missing for the L930.
Here in version 14393.448 is working normally connect and record video with the App "Camera". Maybe the Phone App does not support the 4 microphones.
Well, I HOPE to M $ correct the microphones in RedStone 2 Final, If a third-party app is able to power the 4 microphones, then only M $ needs to work so that it works again on all L930s.
http://i1-news.softpedia-static.com...-leaks-features-quad-microphones-490304-3.jpg