To stream music from your Mac/PC/NAS, you need to share your music library using UPnP DLNA software in your network. We do recommend to install the free UPnP software XBMC
Please follow these instructions to import and share your music library via XBMC:
Another popular software that many of our users recommend is Plex.
Additional UPnP software packages are tversity, Asset UPnP, Bubble UPnP, Minim Server and twonky.