Do they require you to be a Prime subscriber as well, or is this a separate service? I seem to recall Prime customers have access to some online music and possibly movies as well.
Like Gene, I subscribe to Apple Music, and access it (as well as my ripped library on a NAS server) through iTunes on a Windoze laptop. The D50s is attached o the USB port on the laptop. The D50s can connect to music sources via TOSlink, coaxial/digital (RCA connector), and Bluetooth. I can stream music from the ipad or iphone into the D50s bluetooth receiver, but the laptop to D50s is the primary way that I stream.