spectrogram

As part of a research project, I would like to analyze a sound file by generating it's spectrogram. I have been able to successfully generate the spectrogram of the wave file in matlab with frequency on the y-axis and the time on the x-axis. I would however, like to generate the spectrogram with the frequency on the x-axis and the time on the y-axis. How can this be done? I have searched through stack and have not found any accepted answers. My code which generates the spectrogram with the frequency on the y-axis and the time on the x-axis (Matlab code): [song, fs] = wavread('filename.wav');

For my current project in C++ / Qt I need a library (LGPL is preferred) which can calculate a spectrogram from a signal ( basically an array of doubles ). I already use Qwt for the GUI part. Any suggestions? Thanks. It would be fairly easy to put together your own spectrogram. The steps are: window function (fairly trivial, e.g. Hanning) FFT (FFTW would be a good choice but if licensing is an issue then go for Kiss FFT or similar) calculate log magnitude of frequency domain components (trivial: log(sqrt(re * re + im * im)) David Cary "How do I create a frequency vs time plot?" lists several

I am trying to create a spectrogram from a .wav file in python3. I want the final saved image to look similar to this image: I have tried the following: This stack overflow post: Spectrogram of a wave file This post worked, somewhat. After running it, I got However, This graph does not contain the colors that I need. I need a spectrogram that has colors. I tried to tinker with this code to try and add the colors however after spending significant time and effort on this, I couldn't figure it out! I then tried this tutorial. This code crashed(on line 17) when I tried to run it with the error

I am trying to plot the spectrogram of my time domain signal given: N=5000; phi = (rand(1,N)-0.5)*pi; a = tan((0.5.*phi)); i = 2.*a./(1-a.^2); plot(i); spectrogram(i,100,1,100,1e3); The problem is I don't understand the parameters and what values should be given. These values that I am using, I referred to MATLAB's online documentation of spectrogram . I am new to MATLAB, and I am just not getting the idea. Any help will be greatly appreciated! rayryeng Before we actually go into what that MATLAB command does, you probably want to know what a spectrogram is. That way you'll get more meaning