HDMI Encoded Output supported on new MBP?

[kryptticAZ]

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?
[doublepost=1479861203][/doublepost]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?

 

[vipergts2207]

I can't necessarily help you with your problem, but as far as a better adapter, I'd probably stay away from the various multiport adapters for video output to HDMI. It seems like everyone I've looked at (other than a Cal-digit hub) only supports 4K at 30 Hz. At the moment, the only ones that do 4K at 60 Hz are a few dedicated, USB-C to HDMI dongles.

 

[kryptticAZ]

I'm using the Apple adapter right now as I presumed this would be the most compatible. Can you recommend a good HDMI-only adapter?

 

[vipergts2207]

Uptab and Moshi both make 4K 60Hz adapters.

 

[kryptticAZ]

Do these also support multichannel audio?

 

[xraydoc]

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?
[doublepost=1479861203][/doublepost]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?

Can you try a video with surround audio from iTunes? Preferably something directly from the iTunes Store (so it's a known good, Apple-compliant file format). If it works from iTunes, then perhaps VLC needs an update.

 

[kryptticAZ]

The thing is that the audio works correctly when plugging directly into the HDMI port on my previous generation MacBook Pro. That leads me to believe either the Apple A/V multi port adapter isn't behaving or the new MBP's don't output multichannel audio through the USB-C ports.

 

[vipergts2207]

Do these also support multichannel audio?

Both of them say they do.