Hello, Audio fans...
Audio3.0 is a program which allows you to simulate various types of parametric
equalizers and elecronic crossovers.  This program may also be used to
determine the various Q's, gains, and center frequencies necessary to tune
an audio system.  A spectra file, generated by a variety of real time or
spectrum analyzers may be input, plotted, and equalized on screen.  The input
data may also be smoothed via a curve fit algorithm.  A known reference 
system response may also be input to eliminate certain unknowns in the 
measurement process, such as microphone response. Or the microphone response 
alone may be input to offset its response.  The resulting plot can also be
printed  See the on line help.

Have fun...