4th Gen AppleTV Airplay Audio Streaming Stops
I have 2 4th gen Apple TVs and 2 3rd gen. I also have an Airport Express and a Denon receiver that supports Airplay. Streaming iTunes from my MacBook Pro to the 3rd Gen ATV, the Airport Express and Denon works perfectly fine. Streaming from my iPad or iPhone to all the devices, including 4th gen Apple TVs, works fine.
However streaming from the MBP to either one of the 4th Gen AppleTVs always stops after about 30 seconds. This happens when the MBP is simultaneously connected to Ethernet and Wifi on the same Airport Extreme router. It also happens if I turn off Wifi on the MBP and am only connected via direct Ethernet or turn off Ethernet and am only connected via Wifi.
One of the 4th gen AppleTVs is on the same Wifi network, the other is on the same router and connected via Ethernet. One of the 4th gen ATVs is only about 6' away from the MBP and both are about that distance from the Airport Extreme router.
If I look at the Console when the streaming stops I cannot see any entry that would seem to have any relationship to the audio stopping. Clicking on the orange triangle in iTunes shows the message "An error occurred while connecting to the AirPlay device 'name'. The network connection was refused."
I have searched the threads here and found various issues w/the 4th gen but have not turned up anything that seems to help solve my problem. Any suggestions?
MacBook Pro (Retina, 13-inch, Late 2013)