How to prevent listeners from hearing beeps that my msn messenger makes?

[DjSeaBass]

If you broadcast off your winamp ( mp3's ) then in your SHOUTcast plugin select Input and set it to Winamp ( recommended ); if you use turns and mixers ( more like a real dj ) then set it onto your sound card ( you need to have a really good card in order for this option to work properly ). In this case make sure you disable all windows sounds.
Hope this helps...