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5T33Z0 / AppleALC-Guides

Guides for working with the AppleALC source code to get audio working on Wintel machines running macOS.
BSD 3-Clause "New" or "Revised" License
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Codec-Dump-PNG Jack Mic External connected\disconnected #11

Open Baio1977 opened 5 months ago

Baio1977 commented 5 months ago

I extracted codec dumps from linux with external mic connector (jack) connected and disconnected and this is the result:

1 internal microphone Internal Mic

2 External microphone Dump External Mic (Jack Headphone)

As you can see, the dump highlights the connection nodes of the internal\external Mic, furthermore it is visible on connector 27 (0x1b) something changes when connecting the Jack, but at the moment the 27 OUT node is unused

5T33Z0 commented 5 months ago

My guess is that audio is not forwarded to the speaker if a external MIC is connected to avoid feedback loops.