As the title suggests I have been battling sound issues in my Minix Z83 driven entertainment system since I first put it together. The basic system consists of the Minix Z83-4, Samsung 5.1 surround receiver/system (built in apps and blue ray player), and (new) 4K Hisense TV. I have other components such as HDMI switch, HDMI splitter, and standard DVD player. My problem is that I cannot control whether the Minix outputs surround 5.1 or just plain stereo. This seems to be driven only by what the Minix "sees" on the HDMI bus and cannot be fixed to a specific value in control panel. If I connect MINIX -> HDMI switch -> Samsung HDMI IN then going to control panel I have 5.1 config option and can test and hear rear speakers. Almost ANY other setup there is NO surround option in control panel. As an example, if I insert an HDMI splitter (1 IN 2 OUT) anywhere - between HDMI switch and MINIX, between HDMI switch and Samsung receiver, or at Samsung output the MINX reverts to 2-channel only. Even connecting MINX directly to TV HDMI I can only see stereo option in control panel. Is there any way to FORCE the sound to 5.1 like I could do with a standard computer sound card? Is this possibly an HDCP problem/phenomenon? What version of HDMI and HDCP does the MINIX Z83 support? I have FW 1.5.