Thanks for the responses everyone! On Thu, 2003-10-16 at 15:06, Tommi Sakari Uimonen wrote: > Do you hear the same noise with headphones in the Sound Blaster card and > all other outputs/inputs disconnected from all cards? No!! The noise goes away completely (and I get good signal levels)! Cool. > I suggest that you take your electricity for the computer and amplifier > and all that get's physically connected to them from one grounded outlet. > And beware if you have antennas connected to the system, they give ground > loop humming also. 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: computer -> mixer -> headphones computer -> amp -> speakers as I get going computer -> mixer -> amp -> speakers On Thu, 2003-10-16 at 15:35, Jesse Chappell wrote: > Joshua Haberman wrote on Thu, 16-Oct-2003: > > > This is a little off-topic, but I hope you don't mind. I get quite a > > lot of noise from my soundcard. There is a pulsing that sounds > > something like a very fast morse code at a consistent pitch, and it's > > unacceptably loud. I notice variations in this noise based on how I > > move my mouse. > > 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. Josh
