With following setup:
Live Plus unit with latest (5/17) firmware connected to TV via HDMI, and from Live Plus unit to a Sherwood AVR via Optical audio cable -
I can confirm following:
With Audio setting set to: Digial Pass Through - NO Netflix Audio via Optical. But Netflix Audio via HDMI is fine.
With Audio setting set to: Digital Pass Through via Optical Only - Netflix audio via optical works fine.
With Audio setting set to: Stereo - Netflix audio via optical works fine.
So, with Audio set to: Digital Pass Through, Live Plus is not outputting audio via optical.
This applies ****ONLY**** to Netflix. Other Internet Media services, and local video files are working fine via these settings.