One issue I see currently with my iPhone 6sP on iOS 13.2 and the mydlink app v1.10.0 B234, the speaker icon has a (x) indicating the microphone is disabled. Checking with the DCS-933L, 936L, 960L, the microphone IS enabled on the cameras web page. If I select the speaker icon on the app I get a message pop up saying that the microphone is disabled, do you wan to enable it? Yes or No? Selecting Yes doesn't do anything. I don't hear any sounds from the app. I have enabled sound detection on the 936L and have received notifications of sounds from this camera. So I believe the cameras microphone is working.