Q: Need full resolution HDMI audio and 2 CH optical simultaneously
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by John Lockwood,Apr 24, 2015 1:37 AM
John Lockwood
Apr 24, 2015 1:37 AM
in response to matt bolton
Level 6
(9,255 points)
Servers EnterpriseAs standard sound would go to one or the other output, it is possible to configure things to send sound to both at the same time, but I would strongly expect this would require both to be configured the same i.e. stereo, rather than one being stereo and the other 5.1.
To configure the Mac to send to both you need to use the Audio MIDI Setup tool in the Utilities folder.
See https://support.apple.com/kb/PH5178?locale=en_US
and How to combine multiple audio interfaces by creating an aggregate device - Apple Support
It maybe that the easiest or more practical option would be to use an AV Receiver set to output via both its stereo and HDMI ports. The Mac would then just send via HDMI to the AV Receiver which would if needed handle the conversion and splitting of the signal.