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Thread: HD Audio Header: connect array mic?

  1. #1
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    HD Audio Header: connect array mic?

    My 2010 Jeep Patriot has a dual-mic uConnect mirror - I'll be bypassing the uConnect system and I'm hoping to connect the mics directly to the on-board sound on my motherboard.

    My question is, once I identify the wires coming from the mics, can I just connect them directly to the HD Audio header, without any other pins connected?

    The HD Audio header spec is:

    1 - MIC2_L
    2 - GND
    3 - MIC2_R
    4 - -ACZ-DET
    5 - LINE2_R
    6 - GND
    7 - FAUDIO_JD
    8 - No Pin
    9 - LINE2_L
    10 - GND

    So my assumption is that the two mics in the mirror would connect to pins 1 & 3, I expect each mic also has a ground wire which I'd connect to 2 & 6 on the motherboard.

    Does that make sense?

    Also I fear this may not work if I don't have anything on 7 - FAUDIO_JD (I expect this is jack detection) and possibly 4 - -ACZ-DET (which I think might be a way for the motherboard to detect that we're using the HD Audio spec instead of AC'97. Perhaps I may need to connect 10 to GND as well?

    Also for grounding, do I need to splice the mic grounds connecting to the header on 2 & 6 (and possibly 10) to the case or car chassis as well? Or does the motherboard header provide this to the mics through the pins? (in other words is that their purpose?)

    AC'97 only has one mic input on pin 1, HD Audio natively supports array mics and the Realtek driver + Windows should handle noise reduction & echo cancellation nicely, so I hope this will work.

    g.

  2. #2
    MySQL Error soundman98's Avatar
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    you will probably need to figure out the mics in the mirror first-

    microphones are different then speakers because they require power to produce their signal that gets sent to the audio equipment. different mics handle this differently-- some get power from the audio device they are connected to-- like may computer mics, or pro audio(usually referred to as 48v+ 'Phantom power' in pro audio).

    other mics use a external power supply(louroe electronics is one brand i know of-- these mics use external 12v to power the mics..) and send the audio signal as a low voltage signal-- similar to the signal that mp3 players have on their headphone jack output..

  3. #3
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    Quote Originally Posted by soundman98 View Post
    you will probably need to figure out the mics in the mirror first-

    microphones are different then speakers because they require power to produce their signal that gets sent to the audio equipment. different mics handle this differently-- some get power from the audio device they are connected to-- like may computer mics, or pro audio(usually referred to as 48v+ 'Phantom power' in pro audio).

    other mics use a external power supply(louroe electronics is one brand i know of-- these mics use external 12v to power the mics..) and send the audio signal as a low voltage signal-- similar to the signal that mp3 players have on their headphone jack output..
    I managed to find what I think are the relevant pins for the mirror connector:

    Mic 1 (+)
    Mic 2 (+)
    Mic (-)
    Mic Feed

    Does that make sense?

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