Zones have been working great for me for years until I upgraded to the latest Windows build.
I could play four different songs to four different Zones simultaneously.
The configuration that worked:
⦁ Windows 10 version 1709
⦁ Media Center 26
⦁ 7.1 USB Audio device with manufacturers driver installed.
⦁ Zone 1 : Audio Device = USB2.0 High_Speed True HD Audio (Direct Sound). Device Settings = Left Front - Right Front
⦁ Zone 2 : Audio Device = USB2.0 High_Speed True HD Audio (Direct Sound). Device Settings = Left Rear - Right Rear
⦁ Zone 3 : Audio Device = USB2.0 High_Speed True HD Audio (Direct Sound). Device Settings = Center - Low Frequency
⦁ Zone 4 : Audio Device = USB2.0 High_Speed True HD Audio (Direct Sound). Device Settings = Left Side - Right Side
After upgrading to newest Windows build, audio played to Zone 1 2 3 or 4 plays only to Zone 1.
I have been scratching my head on this one for some time. Any advice would be appreciated.