c#: Has anyone know good webpage or book covering C# code in transformation
of real time or sampled time data into FFT spectrum display (using
GDI+).

I like to learn FFT processing in abc way...can anyone point me good
book or student course booklet.

Thanks.

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Now it would be convenient if there were as much numerical software in C# as
in Fortran.

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"Understanding Digital Signal Processing" by Richard Lyons.
http://www.amazon.com/exec/obidos/tg/detail/-/0131089897/qid=1129898412/sr=1-1/ref=sr_1_1/102-0128510-8084105?v=glance&s=books

Chapter 1 is abc, but thereafter, at least for me, the math became
progressively harder and my comprehension diminshed accordingly.
Using the examples and after much study, I understood the mechanics
of the math to write a Discrete Fourier Transform (DFT) and low-pass
filter, however, I did not understand the beauty of the math (if you
get my meaning) to go past the first half of the book.

The DSP newsgroup is comp.dsp .

Here's Java source code using FFT from Craig Lindley's book of
"Digital Audio With Java":

ftp://ftp.prenhall.com/pub/ptr/professional_computer_science.w-022/digital_audio/

Doug