What are you using for Streaming Audio?
Currently RCForb doesn't have any built-in audio solution. This means you need to setup 3rd party software to handle audio.
If you plan on settings up a RX/TX Remote, Skype is best for handling those users. If you plan on RX only, then using something like Unreal Media Server is a good streaming audio server that provides a "live" stream from your microphone or line-in.
I have both Skype and Unreal setup for my radio.
Unreal Media/Live Server Setup Guide
http://forums.remotehams.com/index.php/topic,16.0.html