[PD] sonogram abstraction idea with data structures.

[João Pais]

Generating and displaying many structs can be very slow, it might not be 
the most efficient way. Not sure internally if it's better to bang~ a 
whole table, or find a method to go not so fast. Anyway, when generating 
structs, it will help if the window where they will be drawn is closed.

I think the eargram library had already a sonogram also based on data 
structures, probably using timbreId.

I also did some own improvements to the partial tracer file (for both 
analysis and synthesis), there were some small bugs/incoherences there: 
(not sure if this picture will show in the list)

> I wanted to implement a sonogram analysis like max's spectroscope~ 
> does (see picture) with FFT analysis and data structures. Any ideas? I 
> guess I can [fft~] connected to a [tabsend~] and then have a [bang~] 
> reading the table values for generating the graph, that's my first guess.
>
>  But I am also now inspired by partialtracer.pd from the data 
> structures tutorial, which uses [sigmund~] and it'd be great if it had 
> a new output mode for raw FFT amplitudes, I am assuming that the 
> 'peaks' output doesn't really work for this, or would it?
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