try catch audio

src/r3-d3-audio.js

@@ -76,6 +76,7 @@ R3.D3.Audio.prototype.createInstance = function() {
     if (document.documentMode || /Edge/.test(navigator.userAgent)) {
         R3.Component.prototype.createInstance.call(this);
     } else {
+        try {
             audioLoader.load(
                 this.apiUrl + this.path + '?ts=' + Date.now(),
                 function (buffer) {
@@ -88,6 +89,10 @@ R3.D3.Audio.prototype.createInstance = function() {
                     R3.Component.prototype.createInstance.call(this);
                 }.bind(this)
             );
+        } catch (error) {
+            console.warn('failed to load audio - does it exist? : ' + error.message || 'unknown reason');
+            R3.Component.prototype.createInstance.call(this);
+        }
     }
 
 };