Mystery screeching signal in all 8 inputs in envy24 control

[jkasha]

Please help!

There is a loud, high-pitched constant signal peaking out all 8 inputs of my m-audio interface, even when the interface is turned off. (In other words, seems to be a software problem). I can see the signals peaking in red at top of meters in envy24control. If I use envy24control to route those inputs to my stereo output, or if I try to record using ardour/jack, All I get is that annoying shrieking signal, which is extremely loud (ie, not just a little noise). It seems like there's a logical feedback loop or something is incorrectly routed to those inputs in alsa, pulseaudio etc. It's made my studio completely unusuable

I have checked alsa & pulseaudio settings using alsa mixer, kmixer, paprefs, etc, but don't see anything wrong.... But I am not an expert and may easily have missed something.

Any help much appreciated. Thank you!

alsa-info posted here:

http://www.alsa-project.org/db/?f=ebddc ... 69d4c6437a

I am using Fedora15, KDE4 (with phonon), alsa & pulseaudio. It all worked fine until recently. No idea what triggered the change.

Jeremy

PS I have the same problem when I logged in using Gnome, instead of KDE4. So I doubt it is because of KDE... but I am not certain.

[slowpick]

/home/jcasha/.config/envy24control maybe rename that, and reboot, also
look to see if an envy24control profile has been saved, and remove the card
from it, on the profile tab.

Some devices should be plugged in after booting, then the power
switched on.

There is a fairly new version called Mudita, try that version, or an older one,
or reinstall this one.

run htop in a terminal to see if an app is running that can be killed, that stops the screech.
killall pulseaudio
if you run that, and screech dies, its a hint.

Was any new audio software installed? Maybe it messed up and you have 48,000
in one place 44,100 somewhere else. Is there a motherboard sound chip to test if it
also screeches?