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Author Topic: fast FFT library  (Read 1435 times)
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g_u_e_s_t
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« on: August 19, 2012, 03:58:42 pm »
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i just finished making an arduino fft library
http://wiki.openmusiclabs.com/wiki/ArduinoFFT

it can do anywhere from 16 to 256 points
which returns 8 to 128 real frequency bins
and operates in ~7ms for a 256 point fft

there are multiple output functions
one of which is in octaves
so its pretty useful for doing sound work
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pito
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« Reply #1 on: August 19, 2012, 04:30:13 pm »
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Well done!
It compiles with 1.0.1 as well.
What does it mean "there is a pure data patch for visualizing the data." pls?
p.
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g_u_e_s_t
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« Reply #2 on: August 20, 2012, 12:26:50 am »
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there should be a pure data patch in the folder
and it plots the fft data on a graph

pure data is an open source graphical programming language
specifically targetted at audio applications
highly reccomended
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« Reply #3 on: August 20, 2012, 07:47:06 am »
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Isn't "fast Fast Fourier Transform" a tautology?   smiley-wink
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g_u_e_s_t
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« Reply #4 on: September 05, 2012, 10:22:28 pm »
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i just finished an FHT
which can do the same thing as the FFT
but takes half the time and half the memory

http://wiki.openmusiclabs.com/wiki/ArduinoFHT

it has the same spectrum output options as the ArduinoFFT
so it is probaby preferable for almost all applications
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