How to start streaming

I just bought a new very high quality DAC (Schiit Gungnir Multibit) which is doing a wonderful job with my CDs.
I understand that the DAC can be used In wirelessly streaming lossless files from a PC or IPad.
I have no idea how to do this.  I have a large collection of such files on my PC and external  hard drives which I have converted to CD.
Can someone tell me what I need and how to set it up?
 I already have WiFi in my house.

Thanks in advance.