diff --git a/modules/mojo/native/asyncsoundloader.js b/modules/mojo/native/asyncsoundloader.js
index 292dbe5e..8cde3282 100644
--- a/modules/mojo/native/asyncsoundloader.js
+++ b/modules/mojo/native/asyncsoundloader.js
@@ -1,11 +1,39 @@
 
 function BBAsyncSoundLoaderThread(){
+	this._running=false;
 }
 
 BBAsyncSoundLoaderThread.prototype.Start=function(){
-	this._sample=this._device.LoadSample( this._path );
+	this._sample = null;
+	if( !this._device.okay ) return;
+	
+	var audio=new Audio();
+	if( !audio ) return;	
+	
+	var thread=this;
+	thread._running=true;
+
+	audio.src=BBGame.Game().PathToUrl( this._path );
+	audio.preload='auto';	
+	
+	var success=function( e ){
+		thread._running=false;
+		thread._sample = new gxtkSample( audio );
+		audio.removeEventListener( 'canplaythrough',success,false );
+		audio.removeEventListener( 'error',error,false );
+	}
+	
+	var error=function( e ){
+		thread._running=false;
+		audio.removeEventListener( 'canplaythrough',success,false );
+		audio.removeEventListener( 'error',error,false );
+	}
+	
+	audio.addEventListener( 'canplaythrough',success,false );
+	audio.addEventListener( 'error',error,false );
+	audio.load();
 }
 
 BBAsyncSoundLoaderThread.prototype.IsRunning=function(){
-	return false;
+	return this._running;
 }
diff --git a/modules/mojo/native/mojo.html5.js b/modules/mojo/native/mojo.html5.js
index fdabab17..c141deea 100644
--- a/modules/mojo/native/mojo.html5.js
+++ b/modules/mojo/native/mojo.html5.js
@@ -426,6 +426,9 @@ gxtkAudio.prototype.Resume=function(){
 
 gxtkAudio.prototype.LoadSample=function( path ){
 	if( !this.okay ) return null;
+	
+	var ty=this.game.GetMetaData( path,"type" );
+	if(ty != "" && ty.indexOf( "audio/" ) != 0 ) return null;
 
 	var audio=new Audio( this.game.PathToUrl( path ) );
 	if( !audio ) return null;
@@ -524,9 +527,10 @@ gxtkAudio.prototype.PlayMusic=function( path,flags ){
 	this.StopMusic();
 	
 	this.music=this.LoadSample( path );
-	if( !this.music ) return;
+	if( !this.music ) return -1;
 	
 	this.PlaySample( this.music,32,flags );
+	return 0;
 }
 
 gxtkAudio.prototype.StopMusic=function(){
diff --git a/src/transcc/builders/html5.monkey b/src/transcc/builders/html5.monkey
index 725b907a..3bffd7cc 100644
--- a/src/transcc/builders/html5.monkey
+++ b/src/transcc/builders/html5.monkey
@@ -119,6 +119,12 @@ Class Html5Builder Extends Builder
 				meta.Push "width="+Info_Width+";"
 				meta.Push "height="+Info_Height+";"
 				meta.Push "\n"
+			Case "wav","ogg","mp3","m4a"
+				If ext="mp3" ext="mpeg"
+				If ext="m4a" ext="x-m4a"
+			
+				meta.Push "[" + kv.Value + "];type=audio/" + ext + ";"
+				meta.Push "\n"
 			End
 		Next
 		Return meta.Join("")