integer chan = 2;
key msg_sound = "22ef5532-5330-a420-a11c-29cce8092daa";

default
{
    state_entry()
    {
        llListen(chan, "","", "");
    }

    listen( integer channel, string name, key id, string message )
    {
        llPlaySound( msg_sound, 0.5 );
        llOwnerSay(name + ": "+message);
    }
}