[billbillw]

@billbillw

Also have a NUC7i3BNH.
HDMI version 1.66 has worked only with an adapter from USB-C to HDMI for me (to a Denon AVR X4000).
After an update to the new version, DTS-HD works now with HDMI (but USB-C is no longer working).

OK, Maybe I'll try the 1.72. At this point, nothing to loose. I can swap back to my Windows SSD tonight and give it a try. Oddly, with 1.66, I had lots of issues with the USB-C-HDMI converter. I had problems with the projector saying unsupported video feed, but it wasn't consistent. 

I updated the NUC7i3BNH to HDMI firmware 1.72 last night. Swapped the windows SSD back to the LibreELEC SSD and I am still having the same issue. No sound output with DTSHDMA and TrueHD when trying to Passthrough. It was late and I didn't try any variations with display rate. I will play around more tonight and try to get another log. At this point, I may have to settle for Window and all its frustrations.