HD audio cables


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hi please see photo
Why in some motherboard hd audio cables... pins two and four are connected ??? Is it needed?
photo_2021-05-07_04-22-06.jpg
 
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muckshifter

I'm not weird, I'm a limited edition.
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Computer motherboards often provide a connector to bring microphone and headphone signals to the computer's front panel. Intel provides a specification for that header, but the signal assignments are different for AC'97 and HD Audio headers.[10]

The pin assignments for the AC'97 and HD Audio connectors are:[10]

 
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Computer motherboards often provide a connector to bring microphone and headphone signals to the computer's front panel. Intel provides a specification for that header, but the signal assignments are different for AC'97 and HD Audio headers.[10]

The pin assignments for the AC'97 and HD Audio connectors are:[10]

Thank you for your guidance. Therefore, it can be concluded that in cable Hd audio..., pins two and four should be connected with a short wire. it's true?
 

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