🚀 go-pugleaf

Hello,
	I am trying to do a convolution between a data array and a filter.
I am looking into using the DSP for this (hey, it's there! why not!).
However, I am having some problems getting into the right mindset.  If
some very kind person can help I would appreciate it very much.  This is
a small part of my work for my dissertation and it's bogging me down.

	First, the DL documentation says that when two vectors are multiplied
the range of the data must be between -1 and 1.  Does it matter how this
is done?  Can I just subtract the minimum and then divide by the range to
get into -1 to 1?  Then after the fft do I just multiply and add to get
the right answer?
	I am using the fft.c code in the DSP folder of the Examples.  It
does an FFT, but not an inverse FFT.  Can the inverse FFT be calculated
using DSPAPfftr2a? 
	As you can see, I am new to Fourier transforms.  That may be
part of my problem.  I originally intended to use the Numerical Recipes
in C book, but their method isn't working properly.  Any help is
greatly appreciated.  

Sincerely,

charles d. kincaid
statman@stat.ufl.edu
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Dept. of Statistics  \_    \_   \_\_\_\_\_   'Damn fine coffee...and hot, too!'