For those that want to do a multicast lab in BCMSN, here is what I do and the things I use.  There are no MP3s here, you will need to supply your own.

Core Router's Configuration
    (This is setup for IGRP, EIGRP & OSPF, plus multi-layer switching and PIM)

Server Software Needs to be loaded on the TFTP server or on your laptop.  Once you start it, select the folder that has the MP3 in it. (Complete direction on how to install and run the application is available at their site)

Client Software Needs to be loaded on all client PCs, select files and type in the class D address & port number for the stream and on the URL line and click open URL.  Make sure that it's RTP://, not HTTP:// (ex. RTP://225.123.234.56:50431) (Direction on how to install and run the application is available at their site)

Here is a basic diagram of what the lab will look like.  You can run this as PIM-DM or use the core router's VLAN51 address as the RP for PIM-SM.