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Does mac mini output audio through mini display port ...
https://forums.macrumors.com/threads/does-mac-mini-output-audio-through-mini-display-port.1209229/#:~:text=The%202009%20Mini%20does%20not%20support%20audio%20over,that%20links%20to%20a%20pair%20of%20audio%20ports.
DisplayPort Fixing Sound "Not Working" Problem [SOLVED]
https://multimonitorcomputer.com/solved/displayport-fixing-sound-not-working-problem.php
Mini DisplayPort audio capability? - Microsoft Community
https://answers.microsoft.com/en-us/windows/forum/all/mini-displayport-audio-capability/89394a5c-474a-4fcd-9726-8af88326829a
There are three components needed to enable Display Port audio: A graphics output device (PC or laptop) that supports Display Port audio and/or dual mode with audio. A Sink device (display) that supports audio playback. For example, a Display Port monitor with speakers or a television with HDMI input if using dual mode.
No sound over Mini DisplayPort to HDMI Ad ... - Apple
https://discussions.apple.com/thread/2639905
No Sound with DisplayPort or HDMI Video Cable ... - Dell
https://www.dell.com/support/kbdoc/en-us/000125484/no-sound-with-displayport-or-hdmi-video-cable-connection
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