I am noticing that when using the below snippet of code that higher frequency samples produce mostly 0's in the lower amplitude bins and negatives in the rest of the upper frequency amp bins.   This does not happen with lower frequency samples (like 'C1.wav').

What gives?

inbins = 1024

ifn ftgen 0,0,inbins,10,1 ; make ftable

ifn2 ftgen 0,0,inbins,10,1 ; make ftable

alin, arin soundin "C:\\temp\\C4_1.wav"

fftinl pvsanal alin, ifftsize, ioverlap, iwinsize, iwinshape

aout pvsynth fftinl

kflag pvsftw fftinl,ifn, ifn2

if ( kflag == 1 ) then

ftsavek "pvs.txt",kflag, 1, ifn

ftsave "pvs2.txt", 0, ifn2

endif