FFT

Create a FFT Buffer with:

const var fft = Engine.createFFT();`.

See this forum thread to learn more about it.

Class methods

dumpSpectrum

Dumps the spectrum image to the given file (as PNG image). Edit on GitHub

FFT.dumpSpectrum(var file, bool output, int numFreqPixels, int numTimePixels)

getSpectrum2DParameters

Returns the JSON data for the spectrum parameters. Edit on GitHub

FFT.getSpectrum2DParameters()

prepare

Allocates the buffers required for processing. Edit on GitHub

FFT.prepare(int powerOfTwoSize, int maxNumChannels)

process

Process the given data (either a buffer or a array of buffers. Edit on GitHub

FFT.process(var dataToProcess)

setEnableInverseFFT

This enables the inverse transform that will reconstruct the signal from the processed FFT. Edit on GitHub

FFT.setEnableInverseFFT(bool shouldApplyReverseTransformToInput)

setEnableSpectrum2D

Enables the creation of a 2D spectrograph image. Edit on GitHub

FFT.setEnableSpectrum2D(bool shouldBeEnabled)

setMagnitudeFunction

Sets a function that will be executed with the amplitude information of the FFT bins. Edit on GitHub

FFT.setMagnitudeFunction(var newMagnitudeFunction, bool convertToDecibels)

setOverlap

Sets an overlap (from 0...1) for the chunks. Edit on GitHub

FFT.setOverlap(double percentageOfOverlap)

setPhaseFunction

Sets a function that will be executed with the phase information of the FFT bins. Edit on GitHub

FFT.setPhaseFunction(var newPhaseFunction)

setSpectrum2DParameters

Sets the spectrum data from the JSON object. Edit on GitHub

FFT.setSpectrum2DParameters(var jsonData)

setUseFallbackEngine

This forces the FFT object to use the fallback engine. Edit on GitHub

FFT.setUseFallbackEngine(bool shouldUseFallback)

setWindowType

Sets a window function that will be applied to the data chunks before processing. Edit on GitHub

FFT.setWindowType(int windowType)