60hz makes one think of power supply...
Box on a new outlet? New lighting source nearby? New "anything
electical" nearby?
CiSP
Eben King wrote:
> I replaced my Soundblaster Live! 5.1 with a different one just like it
> (actually I moved it from the bottom slot to the one above that too), and
> now there's a hiss + 60 Hz hum in the speakers I hadn't noticed before.
>
> Troubleshooting:
>
> It's unaffected by the mixer's "Master" slider, so it's not because one of
> the inputs is noisy.
>
> I disconnected the speakers from the card, no noise. So it's from the card,
> not the speakers.
>
> I unloaded the driver modules, still noisy. So it's the hardware causing
> it, not the software.
>
> I didn't try going to the BIOS to see if it's Linux _itself_ that causes the
> noise, but I suspect that if the card's hot, it's noisy.
>
> Suggested solutions:
>
> Wrap the card with insulated foil/conductive shielding? Upgrade the PS?
> Move the card away from other cards? Deal with it, because nothing works?
>
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