Audio Play in Simple Way

Hi

I am not able to play simple audio app in roku . Can anybody help me for this issues. And also please attach link for that app
I found a app of audio app online and Url for this app is http://kaz.dl.sourceforge.net/project/rokusdkexamples/simplevideoplayer.zip but I cant understand their code .So plz help me to out this problem

Thanks

perhaps some code would help:

sub main()
    audio={url:"http://archive.org/download/RagRadio2013-07-05--GuySchwartz/RagRadio2013-07-05-GuySchwartz.mp3",streamformat:"mp3"}
    port=createobject("roMessagePort")
    audioplayer=createobject("roAudioPlayer")
    audioplayer.setmessageport(port)
    audioplayer.addcontent(audio)
    audioplayer.play()
    while true
        msg=wait(10,port)
        if type(msg)="roAudioPlayerEvent" then
             if msg.isStatusMessage() then 
                  print "Status:";msg.getmessage();" index:";msg.getindex()
             else if msg.isfullresult() then 
                return
             end if
        end if
    end while
end sub