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 ...

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 ...

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 ...

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 ...

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, ...

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, ...

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 ...