[PD-dev] rfft~ behaviour

Tim Blechmann TimBlechmann at gmx.net
Sun Feb 29 15:46:40 CET 2004


hi all,

i'm currently working on an external that's using the fftw3 library to
replace pd's internal fft objects...
the results are amazing, i reduced the cpu load for the real forward fft
to 40-50%

but i realized that the imaginary output of the fftw library is
negative, the imaginary output of pd's fft is positive ... or to be
exact, the output of fftw and pd's fft are complex conjugated ...

any idea, what could cause this? 

 Tim                          mailto:TimBlechmann at gmx.de
                              ICQ: 96771783
--
The only people for me are the mad ones, the ones who are mad to live,
mad to talk, mad to be saved, desirous of everything at the same time,
the ones who never yawn or say a commonplace thing, but burn, burn,
burn, like fabulous yellow roman candles exploding like spiders across
the stars and in the middle you see the blue centerlight pop and
everybody goes "Awww!"
                                                          Jack Kerouac





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