OK, yes it's called Input or Instrumentpanel (Swedish), or if you open the "Music App" you will also see the Media Server available.
If you Share files from your PC/Windows you have to give access via Control panel and network and sharing-> advanced sharing alternatives (text in control panel i not exact, Swedish on my PC).
Also change "alternative for media playing" on control panel.
You can also come there from Windows Media Player directly. See picture.