At 06:55 PM 7/24/2004 -0400, you wrote:
> > Is the PC case intentionally or accidentally connected to chassis ground on
> > the car?
>
>Intentionally, it reduced the noise a bit (from unable to hear music to
>able to hear with annoying hum)

Then you probably need an audio isolation transformer as someone else said.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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