You can switch between your music sources by making a ‘double tap’ on the top of you BeoSound 1.

To change the order in which sources are activated when you ‘double tap’ on top of the BeoSound 1, or to change the source list shown in the BeoSetup App or BeoMusic App*, go to the menu ‘YOUR CONTENT’ in BeoSetup App and then to the ‘SOURCES’ menu.

 

Found here:

https://beosound1.bang-olufsen.com/hc/en-us/categories/200855619-BeoSound-1

 

MM