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@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