We recently reviewed the current state-of-the-art in technical software for the .NET platform and were surprised to discover several gaps in important numerical algorithms.
The Fast Fourier Transform (FFT) is ubiquitous in signal analysis because it underpins most spectral methods. Surprisingly, we found no reliable free implementations and the expensive commercial solutions were too slow.
So we wrote our own implementation for use in our future products and we are making it available to you in DLL form:
In the future, we shall offer complete signal processing and analysis tools as standalone applications with built-in visualization, based upon this library.