The *.c files are the source files for the low-level RTcmix/CMIX unit
generator functions.  For many of these functions, this is the only
"documentation" that presently exists (we're working on it!).  They are
compiled and ranlib-ed into "genlib.a", which is then linked during 
RTcmix/CMIX instrument compiling.  The header file ../H/ugens.h contains
the prototype definitions for these functions.

The *.so files are links to the DSOs of RTcmix/CMIX instruments for dynamic
loading.  The CMIX/cmix executable will look here for the DSO if a full
pathname is not specified in the "load()" score directive.
