Reply 20 of 24, by Logistics
There's not much you can do about this. I've got the same issue with multiple systems, and no amount of recapping, swapping PSU's or moving slots seems to resolve it.
I'd suggest a later model Creative card that doesn't suffer from this issue - CT2800 or CT2900 if you want real OPL3, or an AWE64 Gold. Or a non-creative card.
I understand how you feel, but I think you may be throwing around the idea that you've tried everything, loosely because I HAVE built a system with a recapped PSU, motherboard and SB16, and I didn't have this noise issue on the powered nor line-level channels, , and I used headphones.
Everyone should keep in mind that capacitors only have an idle life of around 15 years, or so the story goes, and this could account for oscillations and such which people are referring to as "noise."