Re: content versus presentation in music and Lilypond (was Re: forcing TimeSignature visibility)

[Mark Knoop]

At 13:59 on 13 Apr 2015, Kieren MacMillan wrote:
>The “presentation layer” comprises, in part, choices that must be made
>to physically represent the content on the page, given the page
>geometry, clarity considerations, etc. In this Piano/Conductor
>engraving/presentation, m. 4 immediately follows a line break; since
>the voice staff appears here for the first time (because of
>“frenching” the score), the time signature (2/2) must be included at
>the beginning of the system; however, to make it clear that the piano
>music is still in 12/8, its time signature must be re-displayed, even
>though it hasn’t changed since the last visible time signature (in m.
>1); finally, to make it crystal clear that this is not a change but
>simply a reminder, the piano time signature should be enclosed in
>parentheses (like a “cautionary accidental”). All of these choices
>were forced not by the content, but by the presentation requirements.

\set Staff.timeSignatureFraction = 3/2

seems to work when used as an editionMod (see attached). Yes, it would
be nice to not have to know the actual numbers to use, but there's
probably a way extract that from the context. See
http://lilypond.1069038.n5.nabble.com/How-to-extract-the-current-time-signature-td170857.html

-- 
Mark Knoop

test.ly
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