@mktippett Interesting, with Monterey 12.2.1 and 8-channel MOTU DAC I can only get 5.1 output with Apple Music. Can you share some more details on your setup and configuration?
In Audio MIDI Setup, Configure Speakers, 5.1.2 Atmos Surround is selected, the 8 channels are assigned correctly and the Test buttons output noise on the correct speakers. Nothing at all comes out on the height channels, just the first 6 channels are active (5.1).
af5qt
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