I too just picked up a Yamaha 107 sound bar, and have the Vero 4K connected to it via HDMI (and the sound bar connected to the TV via HDMI ARC). I’m curious if anyone worked out the correct settings to achieve DTS: virtual X?
So, this device is quite limited. After checking/updating the sound bar, could you provide some logs so we can check how the device is recognized from its audio capabilities to make a configuration advice:
enable logging at GUI Settings -> System -> Logging (expert view mode at left bottom )
reboot the Vero with powered on sound bar and TV
GUI MyOSMC and there use the log uploader, provide the returned URL here