Top "Fft" questions

How to draw a frequency spectrum from a Fourier transform

I want to plot the frequency spectrum of a music file (like they do for example in Audacity). Hence I …

transform fft frequency spectrum

FFT Pitch Detection - Melody Extraction

I am creating a pitch detection program that extracts the fundamental frequency from the power spectrum obtained from the FFT …

signal-processing fft pitch sound-synthesis audio

What are the downsides of convolution by FFT compared to realspace convolution?

So I am aware that a convolution by FFT has a lower computational complexity than a convolution in real space. …

numpy scipy signal-processing fft convolution

From Amplitude or FFT to dB

I've a Python code which performs FFT on a wav file and plot the amplitude vs time / amplitude vs freq …

python signal-processing fft wav decibel

How does Octave spectrogram 'specgram' from signal work?

I'm trying to test the specgram function located in the signal package in Octave but I'm a little confused at …

matlab fft octave spectrogram

How to get the FFT of a numpy array to work?

I'm reading a specific column of a csv file as a numpy array. When I try to do the fft …

python arrays csv numpy fft

Python NumPy - FFT and Inverse FFT?

So I've been working with FFT, and I'm currently trying to get a sound waveform from a file with FFT, (…

python audio numpy fft audio-processing

Converting Real and Imaginary FFT output to Frequency and Amplitude

I'm designing a real time Audio Analyser to be embedded on a FPGA chip. The finished system will read in …

math fft frequency-analysis

Why isn't this inverse Fourier transform giving the correct results?

I want to invert the Fourier transform of an image in MATLAB, but the result is not the original image (…

matlab image-processing fft

Is it worth offloading FFT computation to an embedded GPU?

We are considering porting an application from a dedicated digital signal processing chip to run on generic x86 hardware. The …

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