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CocoaDocs.org - EZAudioFFT Class Reference
http://cocoadocs.org/docsets/EZAudio/1.1.2/Classes/EZAudioFFT.html
Overview. The EZAudioFFT provides a base class to quickly calculate the FFT of incoming audio data using the Accelerate framework. In addition, the EZAudioFFT contains an EZAudioFFTDelegate to receive an event anytime an FFT is computed.
Create a FFT Analyzer part III: building UI with Cocoa and ...
http://sample-hold.github.io/2011/11/23/create-a-fft-analyzer-part-iii-building-ui-with-cocoa-and-objective-c/
kSpectrumParam_BlockSize: the FFT block size, from 1024 to 16384 samples. By raising this parameters, we raise the FFT precision, but in the other hand we get slower computing/drawing times, kSpectrumParam_SelectChannel: a simple parameter to restrict FFT analysis on left or right channel (if our audio unit is inserted into a stereo bus),
cocoa touch - How to use vDSP in iOS for converting …
https://stackoverflow.com/questions/15563109/how-to-use-vdsp-in-ios-for-converting-sound-file-to-fft
The FFT is a complex beast, not something that can be comprehensively discussed in a single text box (I know accomplished engineers who have taken multiple semesters of classes studying topics that boil down to Fourier Transform analysis). Because of the nature of Accelerate framework's tasks, it too is a non-trivial discussion topic.
Audio Visualization in Swift Using Metal and Accelerate ...
https://betterprogramming.pub/audio-visualization-in-swift-using-metal-accelerate-part-1-390965c095d7
It’s the amount of energy around that frequency. We’ll cover this concept shortly. First, we’ll take a look at the audio signal, then how a Fourier Transform works, and finally, how we can implement fast fourier transforms (FFT), which literally just means a fast way, algorithmically, to compute fourier transforms. Sound travels as a wave.
Fast Fourier Transformation FFT - Basics - NTi Audio
https://www.nti-audio.com/en/support/know-how/fast-fourier-transform-fft
The "Fast Fourier Transform" (FFT) is an important measurement method in science of audio and acoustics measurement. It converts a signal into individual spectral components and thereby provides frequency information about the signal. FFTs are used for fault analysis, quality control, and condition monitoring of machines or systems. This article explains how an FFT works, the …
Create a FFT Analyzer part V: final thoughts, sources for ...
http://sample-hold.github.io/2011/11/23/create-a-fft-analyzer-part-v-final-thoughts-sources-for-xcode-4-2-feedback/
Create a FFT Analyzer Part v: Final Thoughts, Sources for XCode 4.2 & Feedback. This part wraps up our tutorial on building an audio effect as Audio Unit for OS X Lion. Though it is not the craziest plug-in you’ll ever built, it made us learn some basis about DSP programming, as well it introduced the XCode environment for developing Audio Units.
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