no 5.1 channel with Mac book

[Berry 76]

Hello,

I have a 5.1 setup with the Arcam AR 390, and I want to do a REW measurement.
On the AVR a have selected the HDMI port GAME, with a long HDM cable a connect it with a thunderbolt hub to my Mac. The UMIK-1 is also connected tot de HUB.

With REW i can measure the front L+R, but I can't choose LFE of surround speakers.
In the AUDI/MIDI setup I can only select 2 output channels (stereo) and no 5,1 setting.

What I'm doing wrong ?

 

[John Mulcahy]

The AVR may need to be set to a particular processing mode to support multi-channel PCM, or that HDMI port may not support multichannel PCM but another might.

 

[Berry 76]

I work't with this setup before the last Mac OS update, and u hade 5.1 channels measurement.
But is wil try other settings as wel

 

[Berry 76]

i have replaced the HDMI to de BD port and set it to DTS nutsral X setting, I stil don't can select more than 2 channels on my MacBook in the audio/midi speaker configuration setting.

I don't know wat the problem is Because it has worked wel before?

 

[Berry 76]

The AVR may need to be set to a particular processing mode to support multi-channel PCM, or that HDMI port may not support multichannel PCM but another might.

Have you any idee how ik can do this.

 

[Berry 76]

problem solved, a crappy usb c multi hub is the problem