The new Raspberry Pi 2 is fast enough to build a nice headless standalone box with SL inside. Controlled by Midi or e.g. with TouchOSC.
To get a good audio quallity I used the Cirrus Logic Audio Card. Since last week there is a kernal patch available for this card and so I could realise this "loopstation".
The prototype is running. Here's a documentations with scripts and setup hints in my blog:http://journeytounknownsoundscapes.blogspot.de/2015/05/a-new-looper-in-town-raspberry-pi-with.html
There is also a small script published how to make a TouchOSC to SL "translator"