I have two wireless access points in my home. The main access, Apple Time Capsule, shows 12 Wi-Fi devices connected. That Time Capsule gets our cable signal directly. The second access point, Apple Airport Express, only had one Wi-Fi device connected and gets it’s signal from an Ethernet feed from our router. Both my wife in the kitchen and I in the dinning room were watching the 2018 FIFA World Soccer match using Spectrum Live TV application. That application is excellent! Her computer was connected to the primary access by Wi-Fi. I could hear both computers at the same time when I entered the kitchen door, which is half way between the two computers. They were not in sync. The delay factor was huge, way over 10 seconds. My computer was way behind my wife’s in delay of audio and video. I then looked to see which access point my computer was using. It was the same as my wife. We have a second access point, an Apple Airport Express being fed Ethernet from our router. That device had only one device connected to it. I changed to this second access point and now my audio and video was way ahead of the computer in the kitchen. The lesson for me is that the choice of Wi-Fi access point is important. I also hope that the buffer errors, picture and audio stopping, will diminish.
Still unknown are the factors that make up the sync errors. Is it that one device has to service twelve devices while the other only services one device? Is the Apple Time Capsule electronically slower due to it’s more extensive electronics?