There are a few Raspberry Pi internet radio projects out there. Here’s one I made pretty much from scratch – I think it’s probably the simplest functional bare-bones internet radio you can make. It starts up when you turn your Pi on and has a single push button for changing the station – no display, no volume control, uses the Pi’s on-board sound jack – in fact nothing fancy at all. The only clever thing about it, is that it remembers which station you were listening to last time it was turned on – though you can make it even simpler and more reliable by removing that bit of the code (see the end of this post).

Full article here:
PiRadio (Blog My Wiki!)