Hi,
unfortunately I have only *very* limited time right now, but this looks
absolutely great!
Just one minor suggestion: I'd insert
\accidentalStyle dodecaphonic
in the \layout block.
I think this would be an extremely nice topic for a post on Scores of
Beauty, if you'd like to write one.
Best
Urs
Am 02.01.2016 um 18:09 schrieb Caio Giovaneti de Barros:
> Hi!
>
> I've been working on a automatic way to engrave a 12 tone row matrix
> in Lilypond (See, for instance, http://unitus.org/FULL/12tone.pdf for
> an explanation of what it is). I'm doing it as a project to teach
> myself Scheme. I wanted to have something concrete to work with wile
> learning and create something useful at the same time.
>
> There are some websites and softwares that already generate this kind
> of matrix:
> http://composertools.com/Tools/matrix/MatrixCalc.html
> http://in.music.sc.edu/fs/bain/software/tta-v2.22d/default.htm
> http://www.musictheory.net/calculators/matrix
>
> but I don't know any that outputs proper engraved sheet music, which
> would be very convenient for me. I any case the point is not to create
> something new, but to have some project that would require me to learn
> Scheme and be useful.
>
> It's being a very interesting experience, sometimes fun, sometimes
> frustrating, a lot of times obsessive, but I finally arrived at
> something which I'm satisfied and wanted to share. So here it is! Just
> put all files in the same directory and run 12tone-matrix.ly to see
> what it looks like. All criticisms and suggestions are very much
> appreciated.
>
> You can read all the 12 transpositions and inversions of the rows. For
> the retrogrades, just read it from right to left. The inversions are
> read vertically, delimited by the dashed lines, and
> retrograde-inversion is read from bottom to top. I'll explain some
> (nasty) details in the following lines.
>
> -------
>
> I found it easier to separate the pure scheme calculations in one file
> and the lilypond specific variables in another one (these correspond
> to 12tone-calc.scm and 12tone-engravers.ily as you may gess). This
> would allow me possibly to use the same Scheme functions with other
> software, although lilypond requires placing a # before each scheme
> function, which make the task a little harder.
>
> I tried to start building some very generic and abstract pitch
> calculations and define functions progressively more specific, so I
> can expand the code more easily and possibly experiment with other
> types or pitch sets or even other musical parameters like durations,
> etc. That's why I have a different concept of an inversion and an
> inversion for 12 tone rows, for instance. I will not go into details
> of how the calculations work since I think it's not appropriate to
> this list, maybe I'll do it in the future in another place. What is
> interesting is that in the process I had to learn and apply the
> concepts of higher-order functions and recursion which are very
> convenient in Scheme.
>
> The engravers were interesting. Since I was basically going to engrave
> 12 rows which are equal in all aspects except the pitches I wanted to
> create some function that would create a new staff with some specific
> configurations and recursively call itself 12 times. The Scheme
> tutorial by Urs Liska
> (lilypondblog.org/category/using-lilypond/advanced/scheme-tutorials/)
> was very useful, I had a hard time trying to imagine how I could do it
> with "the Lilypond way" of defining functions, but with the help of
> the tutorial I was able to arrive at something that works, although
> I'm not 100% satisfied with it yet.
>
> I have the code being controlled by git (another thanks to the
> lilypond blog for showing me the importance of learning git and have
> version control) but it is not published yet since it is mainly a
> personal project, I may do it in the next days, though.
>
> Enjoy! And please send me some feedback.
> Caio Barros
>
>
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