The best audio cleaner on the market in my opinion is the Isotope RX plugin. You can get it as a stand alone application or as a VST plugin that'll work within Vegas. I find it much more intuitive to use and it does an amazing job.

If it's a mono tone kind of buzzing like transformer hum then set up a notch filter so that it's narrow and deep and then just run the notch up and down the spectrum until you hit a point where it's no longer heard. If it's a line transformer (in North America) then you'll kill the humming at anywhere between 60 and about 120 Hz.

I received a tremendous amount of help from the forum when I encountered the same problem on http://www.sonycreativesoftware.com/forums/ShowMessage.asp?ForumID=4&MessageID=616034This Posting. [/link]

Blink, I'm writing down the comments you made regarding the notch filter directions; can you clarify what you mean by 1) setting up the filter so it's "narrow and deep" and 2) running the notch up and down the spectrum? I'd like to be able to use that process in the future.

Here's an example of a notch filter:

http://forums.pinnaclesys.com/forums/storage/143/170425/Notch.jpg

(alternate link if the other one isn't working):
http://forums.pinnaclesys.com/forums/svsappsdb2/forums/storage/143/170425/Notch.jpg


What I have done is just take a parametric EQ and set a few points on it and set a very high Q to create a deep V notch. Right now the notch is set at about 900, but if I slide point 2 at the bottom left or right I can change the frequency of the notch. AC line hum from a motor or a transformer is quite common and has a hum based at about 60Hz so if I slide my notch down towards 60 or so (usually around 100) I can literally kill the hum without doing too much damage to the track.

"Any idea what may have caused it?"

First I'd like to know what "oVoo" is, is it "a type of shamanistic cairn found in Mongolia " or did you mean this:http://www.oovoo.com/?

Regardless. Buzzes can come from either poor equipment picking up radiated signals from all manner of devices. The main culprit is poor sheilding and RFI suppression. Using good kit with balanced microphones is a big step forward in preventing this problem.

The other sources of buzzes can be from airconditioning or anything that makes a noise. I've had problems from the cooling fan in a data projector. Damn thing was a long way from my mic and was barely audible in the venue. Using directional mics as close to the sound source you want to record is the only way to tame these problems and even then you can still get stuck with unwanted noises.

If you were recording something from a web conversation the buzz most likely originated at the source. The compression used on these kinds of connections would have probably made it worse too.

Prevention is easier than trying to get rid of the buzz afterwards. A plain hum is easy, buzzes are rich in harmonics that cover the same spectrum as speech. While you can use HiQ notch filters to attempt to reduce the buzz as suggested above it's almost inevitable you'll also do damage to the speech itself.

Bob.