[PD] fft beginner question

cristiano figueirÿfffff3 figocris at yahoo.com.br
Tue Nov 20 05:13:36 CET 2007


Hi list, i'm trying to study fft in Pd and still don't
understand the numbers produced by the analysis.
I'm on Pd "vanilla" 0-40.2 in debian. I just patch
this:

[float]
|    \
|     \
[osc~] \
|       \
|        [bang]
|        /
[rfft~] / | 
 \     \  | 
  \   / \ |
   \ /  [print~ imaginary]    
    [print~ real]

and then type "0" and "1" in float box and this
analysis came to terminal:


real:
-39.604  0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
imaginary:
0        -0       -0       -0       -0       -0      
-0       -0      
-0       -0       -0       -0       -0       -0      
-0       -0      
-0       -0       -0       -0       -0       -0      
-0       -0      
-0       -0       -0       -0       -0       -0      
-0       -0      
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
real:
-39.378  -0.003371 -0.0035941 -0.0035693 -0.0035941
-0.0035851 -0.0035941 -0.0035895
-0.003594 -0.0035913 -0.0035941 -0.0035921 -0.0035932
-0.0035928 -0.003594 -0.0035931
-0.0035944 -0.0035932 -0.0035941 -0.0035934 -0.0035943
-0.0035935 -0.0035942 -0.0035938
-0.0035943 -0.0035935 -0.003594 -0.0035933 -0.0035941
-0.0035936 -0.0035942 -0.0035935
-0.0035934 0        0        0        0        0      
 0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
imaginary:
0        0.07316  0.036492 0.02423  0.018069 0.014348
0.011848 0.010045
0.0086772 0.007599 0.0067242 0.0059963 0.0053794
0.0048461 0.0043795 0.0039655
0.0035944 0.0032576 0.0029496 0.0026656 0.0024016
0.0021543 0.0019211 0.0016999
0.0014889 0.0012859 0.00109  0.00090034 0.00071485
0.00053315 0.00035397 0.00017647
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0       
0        0        0        0        0        0       
0        0  





What this numbers represents ? Where i can study more?
thanks

cristiano     



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