Hey 
There is a second version of SliceJockey called PicoJockey that is intended to work on a Pi3. The original SliceJockey is pretty heavy, according to Katjaa, so she made the Pico jockey, a simpler version for less powerful system
But Have not gotten any of ten working here yet. There are alof of weird thing happening when I open the patch, like"signal connect to non signal inlet- ignored" and som other stuff I cant figure out how to fix, like som dylib files missing. I tried updating the X11 so I could run extended, but still get errors when I open the patch and no sounds… Eventually I am sure I will get it working 