Jean-louis Durrieu
  • Member for 9 years, 9 months
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Psudocode implementation of true envelope
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As far as I can say, your interpretation is valid, but given the pseudo-code you provide, somehow, there seems to be some confusion with the definition of the quantities. In my understanding, the $...

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Fourier transform of Autocorrelation function, what am I missing here? (Power spectrum)
2 votes

That question was posted quite some time ago! Have you tried the discrete time Fourier transform of $R_{XX}[m]$, instead of the Fourier transform? I believe this is what was meant, there (the text ...

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Zeroing bins before IFFT
5 votes

Filtering a signal by modifying the Fourier coefficients and then inverse Fourier-transforming it is a filter design method known as the "frequency-sampling" method. Many research works on source ...

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Failed to implement Goertzel algorithm in Python
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7 votes

Just had a look, and from the wikipedia definition of the Goertzel algorithm, the frequency in the cosine weight should be a normalized frequency (as for the DFT, by the way). If you modify your code ...

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Most efficient way to extract frequency components of audio signal with near-human accuracy in real time
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5 votes

As I commented on a previous post, the time-frequency analysis method known as "short term Fourier transform" $X$ is equivalent to a filter bank, analysing your signal $x$. For a given analysis window ...

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What's wrong with this code for tomographic reconstruction by the Fourier method?
3 votes

I believe that the actual theoretical reason why the first solution did not work comes from the fact that the rotations are done with respect to the centers of the images, inducing an offset of [S/2, ...

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Programming a Vocoder
2 votes

The following article describes a short-time Fourier transform (STFT) based phase vocoder, as well as a pitch synchronous overlap-add (PSOLA) technique to tackle time and pitch modifications of audio ...

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Efficiently calculating autocorrelation using FFTs
3 votes

To elaborate a bit more on the previous answers, computing the auto-correlation of a signal of length $N$ results in a (sampled) auto-correlation of size $2N-1$. Well, actually, it should be infinite, ...

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How to extract vocal part from stereo audio signal?
5 votes

Thanks for the reference! You forgot to mention your work on drums enhancement, which may also be of interest for Summer_More_More_Tea's application. Well, that all really depends on what you want to ...

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