It's conceivable that it's the UPS itself that performs some chore at
the same time everyday. You could try plugging into the mains (without
UPS) during that period of time and see if the problem goes away.
Otherwise, I agree that it could be some sort of once-a-day RFI that may
be difficult
I would first remove the audio source then short the inputs to the soundcard,
run it overnight, and see if the spikes appear. That would determine if the
spikes are in the source itself or somehow created in the PC.
Most people don't do automatic updates on their linux boxes, but by chance do
Of course it could be that some other program is trying ( and failing) to get
a hold of the sound card at that time but disturbing the system in theprocess.
So to be clear you have some external device (radio, amplifier, whatever)
feeding and audio signal to your sound card. YOu have a program
That seems pretty regular at 8 to 10 minute intervals. Do you live
near a subway line? Or other electric mass transit option? Is the
computer on a UPS or power conditioner type supply line? I get a
spike like that when I use a battery box to power an electret mic. If
I turn it on after
Le Fri, 20 May 2011 10:22:25 -0500,
James Shatto wwwshad...@gmail.com a écrit :
That seems pretty regular at 8 to 10 minute intervals. Do you live
near a subway line? Or other electric mass transit option? Is the
computer on a UPS or power conditioner type supply line? I get a
spike like
