look you cant just bind a exe to any file back on window's XP sp2 i believe there was some exploit with jpeg but it's been patch long ago. The most recent exploit's are using .pdf files .doc files and others these have current exploit's that will allow you to launch code but binding to mp3 and image files i have not seen in some time now if really ever,
if it was that easy to just infect image files and audio files the whole world would be infected
if it was that easy to just infect image files and audio files the whole world would be infected