如何从AudioInputStream获取采样片段的频谱？

Question

是否有一个不错的（纯Java）开源库来获取从AudioInputStream采样的频率频谱？

Answer 1

There are several FFT libraries, for example Apache Commons Math includes a FFT.

Bear in mind, though, that spectrum estimation is something more complicated than simply making a Fourier transform (DFT). (It's true, though, that the most basic method, the Periodogram , amounts to computing the DFT and taking its absolute value).

Answer 2

The website for FFTW, one of the most popular FFT libraries, supposedly has Java bindings. Check out the descriptions on http://www.fftw.org/download.html .