Catalina - FAQs
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8 Channels Option - Where is it? 
No Option for 8 Channels:
Q:  I am supposed to have 8 Channels for 7.1 Surround Sound but when I click
    in the Icon a window appears an option for 6 Channels not 8 Channels.

A:  In the Advanced Controls tab of the Catalina Control Panel, please disable
    Immerzio 3D Gaming Support and then reboot.
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