Package Exports

fft.js

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Readme

FFT.js

Implementation of Radix-4 FFT.

Usage

const FFT = require('fft.js');

const f = new FFT(4096);

const input = new Array(4096);
input.fill(0);

const data = f.toComplexArray(input);
const out = f.createComplexArray();

f.transform(out, data);
console.log(out);
console.log(f.fromComplexArray(out));

// For inverse - use:
f.inverseTransform(data, out);

Benchmark

$ npm run bench
===== table construction =====
    fft.js x 1,259 ops/sec ±1.61% (86 runs sampled)
  Fastest is fft.js
===== transform size=2048 =====
    fft.js x 31,259 ops/sec ±0.68% (89 runs sampled)
    jensnockert x 5,005 ops/sec ±0.73% (95 runs sampled)
    dsp.js x 22,172 ops/sec ±0.62% (91 runs sampled)
    drom x 14,496 ops/sec ±0.58% (94 runs sampled)
  Fastest is fft.js
===== transform size=4096 =====
    fft.js x 13,945 ops/sec ±0.68% (94 runs sampled)
    jensnockert x 3,851 ops/sec ±0.80% (95 runs sampled)
    dsp.js x 7,769 ops/sec ±0.71% (94 runs sampled)
    drom x 6,619 ops/sec ±0.78% (93 runs sampled)
  Fastest is fft.js
===== transform size=8192 =====
    fft.js x 6,222 ops/sec ±0.89% (95 runs sampled)
    jensnockert x 1,180 ops/sec ±0.77% (93 runs sampled)
    dsp.js x 2,298 ops/sec ±0.61% (96 runs sampled)
    drom x 3,053 ops/sec ±0.64% (95 runs sampled)
  Fastest is fft.js
===== transform size=16384 =====
    fft.js x 2,751 ops/sec ±0.82% (93 runs sampled)
    jensnockert x 840 ops/sec ±0.90% (91 runs sampled)
    dsp.js x 931 ops/sec ±0.67% (92 runs sampled)
    drom x 1,416 ops/sec ±0.71% (91 runs sampled)
  Fastest is fft.js

LICENSE

This software is licensed under the MIT License.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.