Here is a polyphonic granular midi synth that uses samples for granulation
1.) Hook up your midi keyboard
2.) Load a Sample – you can also replace the samples in /sf folder in the patch
3.) play notes and TWEAK!
This is a 15 year old 32 voice polyphonic granular synthesizer orginally by phil stone
I need some Beta testers to see how she does on the piSOUND.
32 asynchrounous.synchronous voices might be pushing the upper limits but we can use this as a benchmark afterwards 
PolyGrain: