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jbeuckm/index.js

Created July 21, 2015 18:33
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Using the `fft` library from `npm`.
Raw
index.js
var FFT = require('fft');
FFT_SIZE = 8;
var fft = new FFT.complex(FFT_SIZE, false);
var ifft = new FFT.complex(FFT_SIZE, true);
var inBuffer = new Float32Array([0,.5,1,.5,0,-.5,-1,-.5]);
var outBuffer = new Float32Array(2 * FFT_SIZE);
var outBuffer2 = new Float32Array(2 * FFT_SIZE);
console.log('inBuffer...');
console.log(Array.prototype.slice.call(inBuffer));
fft.simple(outBuffer, inBuffer, 'real');
console.log('outBuffer...');
console.log(Array.prototype.slice.call(outBuffer));
ifft.simple(outBuffer2, outBuffer);
console.log('outBuffer2...');
console.log(Array.prototype.slice.call(outBuffer2));
var realOut = [];
for (var i=0; i<FFT_SIZE; i++) {
realOut[i] = outBuffer2[2*i] / FFT_SIZE;
}
console.log('realOut...');
console.log(realOut);
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