You’ll need to add the correct MIME types in your web.config file. Most probably the missed type is related to JSON. You can add it like this in your config:

<configuration>
 <system.webServer>
   <staticContent>
     <mimeMap fileExtension=".json" mimeType="application/json" />
   </staticContent>
 </system.webServer>
</configuration>

Save it as web.config in your root and restart the server. Add any other missing MIME type if you still have issues.

It seems like SoundCloud has forced their API calls on HTTPS. This means that any crossdomain call might fail from HTTP to HTTPS.

So, you’ll need to run your site directly on a HTTPS protocol to keep all calls consistent. Infact the demo runs on a protected protocol as you can see here: https://apps.flashedge.net/gear

Yes, it has been tested on Android 4.4.2 and iOS 7.1.1 and works just fine!