Although the Dacast platform is based around video streaming, its fairly easy to achieve radio streaming, especially for those using Flash Media Live Encoder.
To do this, first setup your live channel the way you want it.
When you reach the “Encoder Setup” step, either download Flash Media Live Encoder or open the program if you have already installed it.
Now do an “Open file” on your XML file, which should have all the Dacast settings loaded into it already.
As an extra step for radio broadcasters, you will now want to uncheck the video stream in Flash Media Live Encoder (see the image below). This will allow only the audio to come through.