Comments on: Fast Fourier Transform for Flash

By: An FFT in AS3 « Gerry Beauregard

An FFT in AS3 « Gerry Beauregard — Tue, 03 Aug 2010 03:22:04 +0000

[...] run on the ActionScript Virtual Machine (AVM2). These Alchemy FFT implementations include one by Eugene Zatepyakin, and ALF from Drexel University. These are almost certainly faster than pure AS3 FFTs, but since [...]

By: Nate

Nate — Fri, 09 Jul 2010 21:34:54 +0000

To add to the above post in the FFTSpectrumAnalyzer, just a little background on these methods: initLogarithmicAverages, initLinearAverages and analyzeSpectrum. Thanks again! I will keep digging as well.

By: Nate

Nate — Fri, 09 Jul 2010 20:57:57 +0000

Amazing work! I would be fantastic if you could explain a bit more about the FFT classes you have for sound in a blog post. I know you have some sample code on your google code site, but explaining the methods a bit more would be most helpful. I am checking out FFTSpectrumAnalyzer class specifically. Thanks man, you’re doing great work and benefiting the community big time!

By: Schnelle Fourier-Transformation (1D + 2D) für ActionScript | zeroseven labs

Schnelle Fourier-Transformation (1D + 2D) für ActionScript | zeroseven labs — Fri, 25 Jun 2010 12:36:59 +0000

[...] Eugenes Blog zu ASFFT: http://blog.inspirit.ru/?p=405 [...]

By: Shawn

Shawn — Thu, 18 Mar 2010 21:39:27 +0000

Also anxiously awaiting the FFT implementation. Any idea when that will be up??

Thanks man!

By: Lieven

Lieven — Wed, 10 Mar 2010 17:15:23 +0000

Eugene can you be more precise in when the fft class will be available?

Love your work!

By: makc

makc — Tue, 09 Mar 2010 16:15:04 +0000

there was also code completion error, IMAGINARY_FFT_DATA instead of IMAGINARY_RAW_DATA. any way, I am getting 3.5 to 5.5 times faster times

By: Eugene

Eugene — Tue, 09 Mar 2010 16:00:31 +0000

@makc i corrected your code there. from 255 to 256. cause this is the power of 2 of provided 255 by you. so Lib created buffer of 256×256 and required u to fill it.

By: makc

makc — Tue, 09 Mar 2010 15:57:32 +0000

humm, what is required length?

btw, it magically works on powers of two, e.g. for w=512 I have:

time: 3011 ms
time: 579 ms <- yours

By: Eugene

Eugene — Tue, 09 Mar 2010 15:53:21 +0000

@makc i assume the problem is cause Lib required data to fill the allocated buffer. so u should pass the buffer of required length not the one u just randomly selected