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AC3 passthrough via S/PDIF out on Quantum?

+1 vote
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asked Aug 21 in Thunderbolt - Quantum by nathanimal (380 points)
Can the Quantum series interfaces output straight AC3 encoded audio via it's S/PDIF out port? I have tried known sources with AC3 encoding, from my Mac which is running OS 10.14.6, with software set to AC3 passthrough, and can't seem to get anything but stereo PCM to my A/V receiver. The same receiver works fine with AC3 encoded streams from other devices that have both coaxial and optical S/PDIF outputs (like BluRay Players, PS4, etc).

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