Well after 3 days of frustration, I finally got at least for the moment to play stereo, 5.1 and 4.0, keep fingers crossed. This time I was really frustrated and felt like walking away, but I just kept digging, wish I could tell you in computer lingo what I did. As of this writing I am never going to do a Windows update again on my NUC. I did a lot of reading and even my own experience with PC at work and home Windows updates bring there own little problems, it's not that big of a deal at work and home because I don't have things connected to the PC, well an extra hard drive and printer but that's about it.
LUV, that is a good idea to have two folders on the NAS, I don't. I believe what you do with KODI Homer does same, I just couldn't figure it out so I did my own very successful way, assuming i don't have problems.
1. I rip the disc 2.and put in NAS 3. Import from NAS to JRiver which becomes part of my all inclusive library. I then rename each album title, like this Quadrophenia 2.0 BD-A and Quadrophenia 5.1 BD-A, it is super easy to rename anything in JRiver, highlight all, right click, rename the top line, left click and all the tracks are named the same. Now I have 3 players, left column of JRiver, each player is set up for either stereo. 5.1, or 4.0. Now if I am scrolling through my library and I see a 5.1 or a 4.0 with album title, I click player, make adjustment 1 click on my AVR (the 4.0 and 5.1 titles play HDMI out from my NUC) the stereo titles play USB out from NUC into my external DAC, (if I owned an EXASOUND38 it would be easier).
The 3 players are set up as 2 channel, 5.1, and 4.0 they recognize what I am playing, if I was to play a 5.1 in a 4.0 player it would show a popup wanting to change, which sometimes is a hassel..
Anyway that is it in a nutshell, I have no doubt somebody reading this will say, he can do it another way and it would be easier. But I am the one who set it up and I am the one who uses it and until Saturdays update crash worked flawless and I know what I am listening to with a quick view.
As a side note, because I don't have a MCH DAC, I have been working on my wife to let me have the spare bedroom upstairs which is used for nothing right now and if that was to happen I know for a fact I would get the EXASOUND38 mch DAC.
Anybody's input is always appreciated, I don't get offended.