I found the following: If I activated the two radio apps “Radio” and the new “Rose Radio” in the display settings, I can adjust the volume of the radio stream in the “Volume control for each sound source” settings.
As soon as I turn off the “Radio” app and listen to music with the “Rose Radio” app, I can no longer change the volume in the settings.
There is no separate slider for “Rose Radio” in the settings, only one for “Radio” or “RadioFM”
If both apps are activated, the setting also affects both apps. Are these linked?
Regards, Markus