H. S. The first thing you have to do is to get the chassis of the machine earthed properly, either via your power plug or 'crocodile-clipping' a good earth-wire to the chassis. Later you can screw on a pucca earth-wire.
It is grounded via the power plug. I have no reason to believe there is anything wrong with that.
Isolate the speaker-out wire from the sound-card alone, see if the /hiss/ exists. If not go on connecting your peripheral cables and listen till it appears again.
If I disconnect the speaker from the sound card, the hiss goes away. Reconnecting it back makes the hiss come back.
There are big ferrite beads available. Get a couple of beads through which you can pass the speaker cable. You need not cut the formed speaker wire/cable, just loop-string it at the sound-card pin end. If the hiss has stopped, good.
I am not sure this will work since if I boot in Windows the speakers work perfectly well. It is only if I boot into Debian that the hiss comes back during the boot process someplace (which as I mentioned is around when lp0 starts).
Note that the hiss just not some background white noise. It is very pronounced. It gets attenuated when some sound plays (e.g. when I do a sound test in KDE). Otherwise it is like an FM radio, but coming only from my left speaker. Right speaker is perfectly okay as it was before.
guess this is a difficult one and I haven't been able to give more infoIsolating the problem is a PITA but fixing it once isolated, is easy. ;)
Hth.
Well, it is at least asking me to give you more information which may exclude some possibilities and thus help narrow down the cause pf the problem.
thanks, ->HS
-- Ragu VU2RGU Free software is an attempt to use the 18th century principles for the encouragement of the diffusion of knowledge to transform the technical environment of human beings -- Eben Moglen
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