Just wanted to share some insight I discovered when trying out Vox for the first time. When I first installed the app I noticed it would not find my library, all I would see is "iTunes Library Empty or Inaccessible" which I thought was quite weird and tried for about 30 minutes checking iTunes and uninstalling and reinstalling and no change. At that point I wrote the app off as something that needs work. Then I tried another app which does the same thing and discovered the same exact problem. Well the issue is that these apps look for the iTunes Library.xml file. Now as far as I can tell on iTunes v.12.1.2 the file is hidden by default and you must navigate to iTunes->Properties->Advanced and there is an option to share the file with other applications. Once I checked it Vox came to life. I'm not sure when this feature of iTunes got implemented or why it even needs to be hidden but your unable to get your library to load that may be the cause.