"For Asus internet radios like the Air3, Calm Radio commercial-free membership channel URL's can be manually added to this device. Calm Radio's commercial-free channels are available to members of Calm Radio and feature audiophile HD 320K bitrate."
Here is how to Calm radio URL's on your Asus device:
Choose "View Full Table" in the "Internet Radio URL's" section at the bottom of the page.
Choose either Direct URL's (preferred) or Port 80 URL's and download from the "Authentication URL - Type 2" list
Asus internet radios do not use a web-based management portal and must be entered manually into your radio.
From the main menu, select Internet Radio >> Service >> Add New Station Carefully
Carefully add one of the custom URL's we sent you. (Refer to the "Text Entry" section of your manual on how to do this.) When finished, press OK and your new Calm radio channel will be added to "My Favorites" on your Asus.