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Speakers buzzing when 'mame-ing' SOLVED

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MonMotha:

It sounds like there's an audio amp in there somewhere (if the system were a typical unamplified speaker setup, then you should get NO sound without something hooked up to JAMMA as the speaker is physically disconnected).  The input of the amp will pick up all sorts of stuff if nothing's hooked up.  Best option would be to unhook the power from this amp if you're not going to use it.

Plenty of candy cabinets have been MAME'd or otherwise altered, but each candy is different inside, especially those from different manufacturers.  Your wiring and power supplies look absolutely nothing like that found in my SNK Neo 29s, for example.

clutch:

Thanks.  My jamma harness is jvs ready, so I have a connector that terminates in two rca type plugs.  Do you think if I ran these into my computer via an adapter, that would solve the buzz?  The audio amp for the blast city is inside the psu.

clutch:

Problem solved.  Chalk it up to ignorance.  When I had the Soul Calibur PCB plugged in, I had to crank the volume wide open.  Of course, when nothing is going in and the volume is wide open, you will hear a buzz.  I connected the two rca cables to my audio out on the computer and I only have to turn the volume up just a bit to get good sound.  Whew.

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