Remote audio load handles errors properly

audio.js

@@ -60,7 +60,13 @@ function loadRemoteAudio(name) {
 
   xhr.open("GET", audioBaseUrl + name, true);
   xhr.responseType = "arraybuffer";
-  xhr.onload = (xhr) => cacheAndParse(name, xhr.data);
+  xhr.onload = (xhr) => {
+    if (xhr.status == 200)
+      cacheAndParse(name, xhr.data);
+    else
+      console.log("Couldn't load " + name);
+  }
+  xhr.onerror = (xhr) => console.log("Couldn't load " + name);
   xhr.send();
 }