With my older MBP, I could just plug an HDMI cable into my TV or surround receive and get surround sound from a .mkv file that was encoded. With the new MBP, I have to use the USB-C multiport A/V adapter to get HDMI output. When I do this, it won't output encoded audio for surround sound and when I play a file encoded as such, the center channel is completely removed so I can't hear any dialog. How do I get normal HDMI output back? Is there a better adapter I should be using? --- Post Merged, Nov 22, 2016 --- BTW, I notice that when I watch a movie with VLC and browse the output options, the USB-C port (with the adapter plugged in) is showing up as "DisplayPort" rather than "HDMI." Is this issue perhaps that multichannel audio can't be passed via DisplayPort? If so, how do I make this "Pro" machine output multichannel audio?