Adds play indicator (▶) to page title when any audio elements are playing.

AudioPlayIndicators.js

$('audio').on("play pause ended", function(){    
    document.title = document.title.replace("\u25B6","") 
    $("audio").each(function(index) { 
        if(!this.paused) { 
            document.title = "\u25B6 " + document.title.replace("\u25B6 ","") 
            return false; 
        } 
    }) 
});