移動瀏覽器中的HTML 5音頻PlayBackRate

playbackRate在移動瀏覽器（Iphone和Android）中不起作用。以下是代碼。在桌面瀏覽器中玩時，一切似乎都沒有問題。移動瀏覽器中的HTML 5音頻PlayBackRate

<!DOCTYPE html> 
<html lang="en"> 
    <head> 
     <meta charset="utf-8"> 
     <script src="js/jquery.js"></script> 
     <!-- Bootstrap Core JavaScript --> 
     <script src="js/bootstrap.min.js"></script> 
    </head> 
    <body> 
     <audio src="./audio/Kalimba.mp3" id="audio1" controls>Canvas not supported</audio> 
     <button id="playbutton" >Play</button> 
    </body> 
    <script type="text/javascript" > 
     $(document).ready(function (e) { 
      $('#playbutton').click(function() { 
       var audioElm = document.getElementById("audio1"); 
       var playBackSpeed = 0.5; 
       audioElm = document.getElementById("audio1"); 
       audioElm.playbackRate = playBackSpeed; // default speed 1 
       audioElm.play(); 
      }); 
     }); 
    </script> 
</html>

來源

2015-12-21 Kiren Siva