Using the Sonos App for iOS or Android:
From the Browse tab, select TuneIn.
Tap My Radio Stations.
Tap the three dots in the top right and tap Add New Radio Station.
Copy and paste the Streaming URL below and tap OK.
The station will be listed and available in the My Radio Stations section under TuneIn.
Using the Sonos App for Mac or PC:
Select Manage and Add Radio Station.
Paste in the streaming URL below
https://s5.radio.co/s15f6c45d7/listen and type in the name of the station.
From the Sonos music menu, navigate to TuneIn > My Radio Stations where the newly added station will be listed.
On a Mac, the “Manage” menu can be found in the toolbar in the top left corner of the screen. On a PC, the “Manage” menu is found at the top left of the Sonos application.
Apple or Android
Go to your app store (e.g., Google Play Store, Amazon App Store, apple app store etc.). Search for “TuneIn” and download the application onto your device. Once the app has downloaded, create a profile.
In the “Tunein” app For android and apple :
Go to the Favorites tab, and scroll all the way to the bottom of your Favorites list.
Click the "Add Custom URL" button located at the bottom of the screen, and copy and paste the following address :
More info and images here : How to install a custom URL