Top "Fft" questions

Clojure/Java: Java libraries for spectrum analysis of sound?

I am looking for a library that can accept a chunk of audio data and return the average amplitude over …

java clojure audio fft spectrum

Removing pattern and noise in an image using FFT in matlab

I am using the clown.jpg image to be able to get rid of the obvious pattern/noise it has. …

matlab design-patterns image-processing fft noise

DSP - Filtering in the frequency domain via FFT

I've been playing around a little with the Exocortex implementation of the FFT, but I'm having some problems. Whenever I …

filtering signal-processing fft dft

What is a spectrogram and how do I set its parameters?

I am trying to plot the spectrogram of my time domain signal given: N=5000; phi = (rand(1,N)-0.5)*pi; a = …

matlab signal-processing fft spectrogram

Improving FFT performance in Python

What is the fastest FFT implementation in Python? It seems numpy.fft and scipy.fftpack both are based on fftpack, …

python numpy scipy fft fftw

How to implement an Equalizer

I know there are a lot of questions about equalizers in so, but I didn't get what I was looking. …

java signal-processing fft equalizer

Real-time pitch detection using FFT

I'm trying to do real-time pitch detection using C++. I'm testing some code from performous (http://performous.org/), because everything …

c++ audio signal-processing fft pitch-tracking

Implement Hann Window

I take blocks of incoming data and pass them through fftw to get some spectral information. Everything seems to be …

c signal-processing fft fftw

Inverse fourier transformation in OpenCV

I am new in OpenCV and image processing algorithms. I need to do inverse discrete fourier transformation in OpenCV in …

c++ opencv fft inverse dft

How do you analyse the fundamental frequency of a PCM or WAV sample?

I have a sample held in a buffer from DirectX. It's a sample of a note played and captured from …

audio signal-processing fft pitch-tracking