Internet Radio as digital source

What has been suggested by Wlutke  is 100 percent right as per me. 
BlueSound Node 2i is the best for enthusiastic beginners ( in digital streaming)  yet who seek and enjoy audiophile quality. 
You don't need to spend seperately for a device to receive high quality internet radio. 

To make it clear , I wish to add internet Radio "TUNER " as a digital source to my 2 ch audio system. I don't know if there exists such a gear as  internet Radio TUNER or not. . I I am not lookiy for simple internet Radio with analog output with built-in amplifier and speakers. 
Can any one help  me here ? 

Thanks guys . I now realize that all I meet is a laptop as a part of my audio system, and connect it to my DAC with suitable cable. My will seek some help from my children.
I notice that there is some fee  for using these apps like TuneIn .