The files in this directory are for two filter design programs.
filter.f is self explanatory and drops its data in fort.7 and fort.8
There is a manual page on this.  It is run with the ellipse
Cmix program.  design.f needs work.  interp.c is an example of 
a simple sampling rate conversion program embedded in Cmix.
You have to supply your own lowpass filter.  the elliptical filter
program (filter.f and ellipse.c) are useful for this.
