@Szabolcs Yes, that occurred to me.

@Szabolcs it worked. thx

If we could build sites like this with Mathematica: students.brown.edu/seeing-theory

notice that it just works out of the b..."rowser"

@P.Fonseca that is absolutely great! What a slick site

@OleksandrR. Indeed. Although quite easy to mimic it in Mathematica, it is pretty impossible to deploy it on the web with such a "slick" behaviour. When the browsers accepted plugins, it was easier, but then, no one had the plugin (by laziness, mistrust, lack of admin rights...).

@P.Fonseca Or it could be as smooth and responsive at least in the front end

The front end is really sluggish compared to modern browsers.

@Szabolcs Agreed... Just the front page, with the circles moving like bubbles, is difficult to mimic...

Is there a builtin way to plot a Spectogram with a logarithmic frequency scale?

@Szabolcs is the new Cepstrogram what you are looking for?

I don't know. I will take a look. I saw the function, but did not know what "cepstrogram" meant.

Hm, I don't think it's that ...

From Wikipedia: A cepstrum (/ˈkɛpstrumˈˌˈsɛpstrumˈ/) is the result of taking the inverse Fourier transform (IFT) of the logarithm of the estimated spectrum of a signal

That's a bit different. I just wanted to vertical scale to be logarithmic. I could do that manually, starting with the data given by SpectrogramArray. But I was hoping for something builtin.

I'll drop this question here in case someone knows what is going on: