essy-fft

README

Node wrapper for FFTReal.c. See https://github.com/cyrilcode/fft-real.

Example

Exposes method rfft that performs a forward FFT on real time data. Returns the frequency magnitudes, normalized by fftSize / 2.

import essyFFT from 'essy-fft';
 
const fftSize    = 4;
const timeData   = new Float32Array([0.1, 0.2, 0.3, 0.4]);
const magnitudes = essyFFT.rfft(fftSize, timeData);
 
// magnitudes => [0.5099, 0.1414]