Crew, DietPi won’t support multichannel beyond 48 KHz over HDMI, so Edward, stick with your Surface Pro 3. Brent, while your 8802A will do great with multichannel over HDMI (it will downconvert DSF multichannel over HDMI to 24/176.4 internally and the Audyssey MultiEQ sound correction should work well), I expect you will have the same problem as Edward, in that, whether Odroid or RPi3, DietPi won’t support hidef multichannel over HDMI.
In another thread, Dan Knight, the creator of DietPi, indicated that it is a kernel issue and was on his list of things to work on with DietPi. I am unaware of any update yet to fix this issue. Anyone else able to weigh in? @Dan_Knight, you are expert on this one, if you’d comment, please. JCR