I received this echo sound when quitting Natural-selection by typing exit in console (have done it before without any problems) and a guy was speaking in Ventrilo (Voice communication program) at the same time as I closed down NS.
And now I got a annoying echo sound in windows.

But when I start Warcraft 3 The Frozen Throne, then the echo sound stops and it's back to normal but when I quit it's the same.

If anyone know how to turn off the echo sound then please tell me, if you want me to explain it more in details, then ask me.

EDIT: I had this problem for a half year ago but the sound was back to normal after a week or two.

try turning the 3d sound off Both the EAX and the other which name i forgot. It helped me *Still got surround sounds though :S*

Where can I turn off the 3d sound?

Explain it in a step way if it's advanced, like this:
1. blablablabla

2.blablabla
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.
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Here's a screenshot of were to find it Seemed alot easier to explain with the screen in front of ur nose



So go to options and switch tabs to Audio now disable the EAX and A3D sounds modules as shown in the screenie... That should be all... Let me know if the problem is still there.

Ah, Thank you for the help, I'll try it.

I've already done that once when I had echo sound in NS and it worked, but I got echo sound in windows this time, Thank you for the help anyway.

The sound disappeared of it self for a day ago but it came back again when I quitted NS with Ventrilo on.