Center Channel not measuring

[mahbazmi1]

Hi to All,
i have recently bought a Mac Book Pro and install REW in it. while taking the measurement i could only measure LEFT, RIGHT, and ALL SURROUND speakers except the CENTER speaker. my setup as follows:-

PROCESSOR : ANTHEM AVM70
POWER AMS : MARANTZ MM8077 AND MM7055

SETTING IN PROCESSOR : ALL CHANNEL STEREO
MULTI CHANNEL SOURCE : DOLBY SURROUND
NO ROOM CORRECTION (ARC) active

i am using latest version of REW and latest version of macOS Montery 12.3

help will be much appreciated.

thanks and regards
Aziz

 

[John Mulcahy]

You need to use a different processor mode, not all channel stereo. There should be a mode for multi-channel linear PCM over the HDMI connection. If that's not available the interface between the MacBook and the processor may be the problem, some only provide left and right rather than multichannel linear PCM.

 

[mahbazmi1]

hi, John
thanks for your reply. see attached all modes that my processor support. i am not sure which one support multi-channel linear PCM!

thanks again

 

[mahbazmi1]

hi John,
just figured out the issue!

the Channel mapping was mismatching. Center Channel was mapped to 4 in Mac where as 3 in the REW. that's why REW was only measuring LFE instead of Center Channel.

Thanks a lot

Regards
Aziz