I suspect this is not trivial, mainly due to lack of documentation and / or codecs.
โOnline Radio Streamingโ covers many sins. There are many different codecs and many different ways to transfer audio from a server to a client.
There are two main problems. The first is getting the data coming to your computer. One solution is to capture data from the network stack, write a filter driver, or, much easier, using an existing third-party product, such as WinPCAP. The second problem is to find out what is in your data is your audio data. This data will be compressed, so you will need to know which codec is used, so that as soon as you have the data, you can play it. (The codec, for example, can be embedded in a flash file or java applet and therefore will not be available to you). Data can also be encrypted. If so, you also need to undermine the client software involved in the data stream, which is a completely new game.
Basically, you could spend two years on it, simply.
user82238
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