kissfft-js
Javascript port of KissFFT via Emscripten.
Install: npm install kissfft-js
See latest benchmarks against other popular Javascript FFT algorithms here.
Thanks to Chris Cannam for the original benchmark tool and for transpiling KissFFT. This version has been optimized to perform much faster since forking Chris' version.
Example usage for kissfft-js can be found in the test directory.
The examples are only of the real valued transform / inverse, however complex
to complex is also available.
The original KissFFT docs are also here.