If you have music on your computer, Drive or NAS buy this app! In my case I stream my iTunes library via by airplay much easier than via home sharing and iOS music app.
One of the best music streaming apps available MusicStreamer.
Cherry - AppPicker
MusicStreamer makes local music streaming easier than ever.
Joe White - AppAdvise
Download a free trial of MusicStreamer. Available on the App Store. The free version is restricted to 200 songs but allows you to try out all the features of MusicStreamer.