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Hello again Dora,
Sorry for the very late reply since I did something important yesterday, sorry for being the hardest person to understand your explanations but I don't know what you mean with these variables you're stating. I should be placing a sine wave equation on the real right? Should I...
Hi Dora,
Your post is not so clear. I don't know what you mean with fill the buffer with a sine wave. You've cited an example of sin(2*k*pi/n). What is k? I should place sine values on real buffer right? then imaginary buffer with all 0s. Then I should solve for my absolute value after using...
Hi,
Well just now I tried writing it on paper :) I hope I'm getting everything clear. Okay the final point is: the absolute values computed from fft are the frequency values right? Then I will group them to the frequency ranges that I have assigned for each frequency band which I said is 7...
Wow, thanks Dora!:smile: It's already getting clearer and clearer now maybe some more to completely grasp the full concept. I got it so in 256 samples there are 128 img, and 128 real. I will then group the 128 real samples to have 7 bands using frequency ranges.
About the quadrant thing, I...
Hello Dora,
Thanks for the very generous reply. The code I posted above is from this site: FFT Library I'm using its fft library.
Can you tell me the things that are very important in considering fft? What I know are the number of frequency bands, samples, sampling rate, twiddle factor, gain...
Hi zorro,
Thanks for replying, you're suggesting me for my project lots of filters with the logarithmic measurements at the output right? I guess that would be a lot of hardware. I already prepared an analog circuit that will filter up to my highest band. I based everything from this site...
Hi I've read lots of info about FFT, and DFT on wiki and more sites for already a week. I still don't get the essence of some things. I would like to apply FFT to create an audio spectrum analyzer graphics on maybe a GLCD. I would like to have a few frequency bands as few as 7 ( 64Hz, 128, 356...
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