I have a mac mini running JRiver Media Center using JRemote IOS app on my Iphone to remote control it.
Not only can i play files on my local hard drive through my sound system, i can stream it to my Iphone to play
on that and using JRiver's media server functions, can remote control the stream to other WIFi zones in my house via
it's DLNA server, to a Chromecast Audio > digi out > DAC > preamp using BubbleUPnP (a free mac software)
Also using Jriver's Media server function, can stream to my Iphone anywhere in the world where i can get a LTE or WiFi signal
> Airplay > Bluetooth directly to head unit in my car. Basically i can access all of my 130,000 tracks i have on home mac mini anywhere.
Jriver also plays video to my TV via HDMI out on mac mini.https://www.jriver.com/http://www.jremote.net/