Processing Audio Data using Fourier Transforms in Java

java audio wav fft
dedalo picture dedalo · Jun 7, 2009 · Viewed 19.4k times · Source

I'm trying to process audio data. I'm working with Java. I've extracted the audio data to an array. Now I should pass N data samples to a function that calculates the Discrete Fourier Transform (or Fast Fourier Transform, which is more efficient). I've read documentation but I'm getting more and more confused. What I'm trying to calculate is the magnitude spectrum (|X(k)|). Can anyone help me? Thanks

Answer

Robert Harvey picture Robert Harvey · Jun 7, 2009

Richard G. Baldwin has a number of very good articles on Fast Fourier Transform algorithms in Java on the Developer.com website. In particular, the following articles should prove to be useful:

Fun with Java, Understanding the Fast Fourier Transform (FFT) Algorithm http://www.developer.com/java/other/article.php/3457251/Fun-with-Java-Understanding-the-Fast-Fourier-Transform-FFT-Algorithm.htm

Spectrum Analysis using Java, Sampling Frequency, Folding Frequency, and the FFT Algorithm http://www.developer.com/java/other/article.php/3380031/Spectrum-Analysis-using-Java-Sampling-Frequency-Folding-Frequency-and-the-FFT-Algorithm.htm

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