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whine in speakers, don't think ground loop

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  • whine in speakers, don't think ground loop

    This is my last problem till I'm totally satisfied with my little system.

    I get a high pitched whine in my speakers. If I tap the wires to the mic I also get crackles and loud buzzes. I'm using audio sockets soldered to wires since I built my own case so have no proper front panel.

    I think the mic has one channel and a ground. Yet the mobo manual says:

    Pin Signal
    1---MICIN1_L
    2---AGND
    3---MICIN1_R
    4---+5V
    5---LINEOUT_R
    6---LINEIN_R
    7---LINEOUT_L
    8---LINEIN_L
    9---HPOUT_R
    10--HPOUT_L
    11--SENSE_A
    12--SENSE_B
    13--CEN_OUT
    14--LFE_OUT
    15--SSROUT_R
    16--SSROUT_L
    17--SPDIF_IN
    18--GND

    1 & 2 are MIC IN L & R. Can there be a stereo mic or lines for 2 mics? I have pins 1 & 3 wired to my mic socket. I have pins 2, 5, and 7 wired to the speaker socket. wiggling any of those wires will change the whine. Touching the connector nubs sticking out of the mic socket makes a loud buzz. I can hear the mouse move. I think I must have the wrong pins, but no soldering iron on hand to experiment.

    I had pin 2 wired to the mic & speaker, but took it off the mic hoping the problem was that simple, that they shouldn't share ground.

    Thanks for any help!
    __________________
    VIA Epia PX mobo (VIA C7 1Ghz CPU), 1gig DDR2 667, 4gig ATA SSD, Xubuntu 8.04
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