[PD] soundcard noise

[Christian Klippel]

hi erich,

the noise is comming from the power supply. every time
the cpu transfers data, or calculates, the load on the
power line varies. this variations you can hear through
the analouge electronics on the soundcard.
there is only a few you can do. a high-quality power
supply helps in this situation. it must be strong enough
to avoid ripples/noise on the power lines.
also, try to move the audio cards as far away from other
cards as possible. leave some slots as space between.
it may also be the mainboard, which is weak designed
by means of placement of the power traces ...
the last thing would be to work on the card itself, by
improving/rebuilding the power-supply of that card.
but to do so, you should have good electronics experience.

best thing is to get a good soundcard, they usually have
good power-filters etc. already on board.

greets,

chris


Am Mittwoch, 1. Mai 2002 13:21 schrieb rat at telecoma.net:
> hi,
>
> maybe somebody has some ideas how to deal with it:
>
> i have 2 soundcards with ess1371 in my machine.
> graphiccard is matrox g400.
>
> system is debian demudi with 2.4.5 low latency on pentium 300Mhz.
> XFree86 4.1.0
>
> whenever i move a window, or the edit a pd patch i get some
> really nasty additional noise on my audicards.
>
> i m starting pd now with -frags 8, which reduced it, but not 100% .
>
> thx for help
>
> erich

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