On Fri, Oct 17, 2003 at 11:08:34AM +0300, Tommi Sakari Uimonen wrote: > > I tried putting everything on the same power strip and I still get the > > noise. I have a mixer and an amplifier that the signal is going > > through, and I get the same noise going: > > Then you should have all the equipment physically connected to each other > from their cases, like grounding them together. ** BUT BEWARE, THIS MIGHT > BE DANGEROUS. ** I don't know where you live, but in Finland the > electricity system is pretty darn safe and I wouldn't have any hesitations > to do so. There might be high voltage differences between the cases, so > all equipment should be disconnected from the outlet before grounding them > together. And take life insurance first :) And don't sue me if something > blows :) There's a lot of info available on proper grounding techniques. E.g. there's some here: http://www.cs.uu.nl/wais/html/na-dir/AudioFAQ/pro-audio-faq.html > > > It appears to be system load based, it might be an internal voltage > > > interaction when your CPU goes from idle to active. I've seen > > > this before..... try to run this at a bash prompt: > > > while true; do yes > /dev/null ; done > > > > This takes away a large part of the noise. There is still some noise > > that sounds different, and I can still hear my mouse move. When I move > > my mouse vigorously, it starts sounding closer to what it sounds like > > when that shell script is not running. There are various suggestions for this kind of problem in the old Audio-Quality-HOWTO: http://www.linuxdj.com/audio/quality -- Paul Winkler http://www.slinkp.com Look! Up in the sky! It's MIGHTY CHAIN WOMAN! (random hero from isometric.spaceninja.com)
