fix: download audio background music muted

src/jensen.js

@@ -714,7 +714,7 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
             audio.loop = true;
             audio.controls = false;
             audio.autoplay = true;
-            audio.muted = false;
+            audio.muted = true;
             document.body.appendChild(audio);
         }
         if (document.visibilityState === 'hidden') {