Some thoughts. These are ideas to play audio on a linux based platform, on a low powered device.
This is a daemon console audio player. It can play playlists
How do you get the playlists generated so that it continues perpetually?
This can generate it’s own radio station based on scripting
The Raspberry Pi devices need to have an RTC, otherwise they don’t know what time, or date they are each time they are turned on, unless they are connected to the internet.
This device solves that. http://www.uugear.com/product/wittypi2/
I saw this on a forum post. UK Sky News Audio feed: (I don’t know if it’s current)