Retrieving Data from AudioKit's FFT Plot

Question

I'm working on a project that involves recording audio from the microphone of the iPhone, then feeds it through a Fast Fourier Transform (FFT).

I've found AudioKit.io has a demo in which it actively monitors microphone input and can display a plot of the FFT.

I have equations and logarithms that I plan to analyze the audio data with, so all I really need help with is retrieving the FFT data that is sent to this plot in AudioKit. I'm having a hard time finding the functions/methods that drive the data that fills this plot.

Can anyone point out where to find this FFT data in AudioKit?

Aurelius Prochazka · Answer 1 · 2017-10-12T06:07:08.167

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The FFT code that AudioKit uses is pretty standard. You could take AudioKit's Plot and reappropriate the code as you wish:

https://github.com/AudioKit/AudioKit/blob/develop/AudioKit/Common/User%20Interface/AKNodeFFTPlot.swift

edited Oct 12 '17 at 06:07

answered Apr 28 '15 at 05:33

Aurelius Prochazka

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So what's in the buffer, should be the data I'm after. Correct? – gh0st Apr 29 '15 at 19:52
Yes, that is what you'll use. – Aurelius Prochazka May 02 '15 at 04:57
How might one access buffer data in iOS using swift or objective c? I've never needed to do this before and a quick google search turned up rather dry. – gh0st May 06 '15 at 02:08

Retrieving Data from AudioKit's FFT Plot

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