To obtain the URL for a streaming broadcast, go to the website of the broadcast. There should be a button or link to load the stream, labeled something like "Listen Live", or "Tune in Now". Press the control key while mouseclicking on this link and select Copy Link from the contextual menu. Then paste (command v) that link into the pre-processing field.

WireTap Studio cannnot handle javascript links, so if the link references javascript, you will have to obtain the link some other way.

If copying the link from the broadcast website isn't possible, the URL for the broadcast can usually be obtained from the player streaming the broadcast.

See also

Recording with WireTap Studio
Using WireTap Studio Recording Sessions
Obtaining the URL from an iTunes Streaming Broadcast
Obtaining the URL from a RealPlayer Streaming Broadcast
Obtaining the URL from a Media Player Streaming Broadcast