I would pass a reference to the file on the server in the model or viewbag
Then in the view, on the page ready event intiate the file download or whatever you are trying to do with it.
e.g.
public ActionResult Index()
{
viewbag.filepath = Server.MapPath("~/app_data/ipl.mp3");
return View(db.Notes.ToList());
}
in the view, you can then access the file path via the viewbag.filepath