Re: [frogs] Da Capos, Codas and Segnos

[Ian Hulin <ian@xxxxxxxxxxxx>]

On 16/02/10 17:20, reinhold [via LilyPond Frogs] wrote:

Am Dienstag, 16. Februar 2010 18:07:11 schrieb Ian Hulin:

> Kieren MacMillan wrote:
> > Hi all,
> >
> > I've been lurking a bit on this thread, but felt I should comment.
> >
> > I personally think we need a more general structure than \repeat will
> > ever be able to reasonably offer. Essentially, we need to be able to say
> > that a single movement/piece [of Lilypond code] consists of one or more
> > \section blocks, where a \section would have at least the following
> > independent
> >
> > options:
> >     1. indent value[s] and/or line lengths;
> >     2. section title (e.g. "Trio").
> >
> > Then, each section can or cannot include standard Lilypond \repeat
> > structures, as necessary.
>
> Would it work something like this
>
> \score {
>      \section {
>           %untitled music expressions
>       }
>      \section :#title "Trio" :#indent 1 {
>            %title Trio section music indented by 1 position
>       }
> }

Isn't this exactly the same as using different \score blocks in a file?

Sort of (see below)
> At least David's case of  multiple movements should be
> written with different 
> scores for each movement. I'm using different scores for different
> movements 
> all the time, they use the piece header property for the title, use
> proper 
> intendation, etc.
>   
>   
> Each of these movements can have any repeat structure, of course.
>   
>   
> Currently, we have the following hierarchy:
>   
>   
> -) Book
>   
> -) Bookpart
>   
> -) Score
>   
>   
> I think that suffices all scores. I haven't yet seen a work, where a
> movement 
> is further split into separate submovements that need to be scores by 
> themselves.
>   
>   
I think you're right, \bookpart and \score blocks within these provide
most of what Kieran wanted.

But what about a movement Minuet- Trio then D.C to Fine in Minuet
(generally done as one movement), or likewise Scherzo, Trio, Scherzo
reprise (done via Da Capo) and then a Coda?  Is this all covered by
using \bookpart containing multiple \score blocks? I'm not sure it is,
quite.

Looking at the hierarchy in terms of engraved (pdf) output:

• Book produces a separate output file
• Bookpart produces a compulsory page break and allows modification of \header element
• Score represents a continuous chunk of musical notation covering a contiguous timespan
• Section could mean "a group of score blocks within a bookpart with markups at the start and/or end which reference each other"
  

I think we current;y nearly have enough to handle coda/segno-type stuff
with this sort of idea.

\book {
    \header {
    title = "The Overall Opus"
    }
    \bookpart {
        %First Movement
    }
    \bookpart {
        %Second Movement
    }
    \bookpart { 
        % 3. Scherzo
    \header {
        title = "3. Scherzo"
    }
    % Start of section
    \score {
        % Music for Section A of Scherzo
        % End with markup stating goto Coda if you've finished
performing the Da Capo
    }
    \score {
        \header {
            title = "Trio"
        }
        % Music for Section B of Scherzo, aka Trio, ending with
        % "Da Capo" type markup
    }
    \score {
        \header {
            title = "Coda" % or \markup to generate ¤ (the
hot-cross-bun sign)
        }
        % Music for Section C of Scherzo, the Coda
    }
    % End of section
}

We could have \section with this syntax:
\section title-markup-list lastbar-markup-list list-of-music-expressions
e.g.
\section {"" "Trio" "Coda"}                                    
%markups to use as titles in \header within the score
             {"Al Coda 2a volta" "Da Capo al Coda" ""} %markups to
print at the start of the last bar in each score
             {                                                       
       %the music _expression_ for each score
                {% Music for Section A of Scherzo}
                {% Music for Section B, aka Trio}
                {% Music for Coda}
             }
                
\section could use a new lastbar-markup property for \score which would
be text to be printed at the start of the last bar of a score block,
otherwise it would expand to the above idea.

Doable? Desirable? Or just me diving off down a gopher-hole?

Cheers,

Ian

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