About the beta driver
No, the same problem that you have to set the audio settings if you want to have 5.1 sound in Netflix app to get rid of the image will hack. Think it's a huge mistake by Intel to not have optical audio output on their NUC. Madly decision by someone because I think just lovers of good film and good sound bought NUC.
Okay, you can connect the HDMI directly to your TV, but only gets 2.0 audio with DTS tec. By The receiver you will receive Channel Direct with my settings and NUCE is coding sound instead of your expensive receiver.
Again, a terrible decision by Intel to not have optical or a functioning HDMI.