A unit generator that generates a cloud of sound using multiple Grains.
Special thanks to my friend Ross Bencina for his excellent article on
Granular Synthesis. Several of his ideas are reflected in this architecture.
"Implementing Real-Time Granular Synthesis" by Ross Bencina, Audio Anecdotes
synth.add( sampleGrainFarm = new GrainFarm() );
grainFarm.allocate( NUM_GRAINS );