FYI that Jazz Groove Radio’s 2 free streams are in Roon’s list of radio stations.
As for how to add a radio station using their streaming URL…
Go to “My Live Radio”
Click “+ Add station” and select “Add station URL”
Copy/paste the URL to the streaming audio
Add the desired information about the station
Verify the station displays as expected in “My Live Radio”
Enjoy the music
For community discussion about The Jazz Groove station, you may be interested in…