On 7/12/05, Eben King <eben1@tampabay.rr.com> wrote:
> On Mon, 11 Jul 2005, Chuck Hast wrote:
>
> > On 7/11/05, Eben King <eben1@tampabay.rr.com> wrote:
> > > On Mon, 11 Jul 2005, Chuck Hast wrote:
> > >
> > > > On 7/11/05, Eben King <eben1@tampabay.rr.com> 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.
> > >
> > > The path is
> > >
> > > socket -> UPS -> power strip -> computer
>
> The speakers have a polarized 2-prong plug, and an internal transformer.
>
> > > > if it is not there is sure sounds like you have a ground loop somewhere.
> > >
> > > Is that where my speakers and computer have differing ground potentials?
> > > Should I put the speakers on the UPS's power strip, jusd to test? If that's
> >
> > Yes, that may take care of it.
>
> Tried that, didn't work.
>
> > If that is not the case it may be a noisy power supply, does the card do
> > the same thing in another machine?
>
> I can try that tomorrow (not my machine).
>
> Since the noise is unaffected by the SB's "Master" setting and it _is_
> affected by the speakers' volume control, I can improve my S/N ratio by
> turning up the computer and turning down the speakers, to the point where I
> want it louder and the channel's at 100%.
Ahh, that sounds even more like a ground loop somewhere outside the
card or beyond the audio circuits in the card. If it follows the sound card
to another machine then it probably is cabling if it does not then I would
suspect the power supply
-- Chuck Hast To paraphrase my flight instructor; "the only dumb question is the one you DID NOT ask resulting in my going out and having to identify your bits and pieces in the midst of torn and twisted metal."----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.
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