diff --git a/fc/js/nes-embed.js b/fc/js/nes-embed.js
index 0925788..33b5d15 100644
--- a/fc/js/nes-embed.js
+++ b/fc/js/nes-embed.js
@@ -195,10 +195,14 @@ window.onload = function(){
 
 
 }
+var script_processor=null
+var audio_ctx = null
 function initAudioEvent() {
-    var aaa = window.webkitAudioContext || window.AudioContext
-    var audio_ctx = new aaa();
-    var script_processor = audio_ctx.createScriptProcessor(4096, 0, 2);
+    script_processor && (script_processor.disconnect(audio_ctx.destination), script_processor.onaudioprocess = null, script_processor = null)
+    audio_ctx && audio_ctx.close().catch(handleError)
+    window.AudioContext  = window.webkitAudioContext || window.AudioContext
+    audio_ctx = new window.AudioContext ();
+    script_processor = audio_ctx.createScriptProcessor(4096, 0, 2);
     script_processor.onaudioprocess = audio_callback;
     script_processor.connect(audio_ctx.destination);