Re: [Lilypond-auto] Issue 4077 in lilypond: allow ottava bracket to vanish

[lilypond]

Comment #5 on issue 4077 by address@hidden: allow ottava bracket to vanish
https://code.google.com/p/lilypond/issues/detail?id=4077

I append an extract from a Brahms Waltz, set for accordion and published by  
Edition Schott in 1933.  This is from a time where accordion notation was  
not all  that well-established and/or standardized, so it leans back on  
piano traditions.

Standard basses for accordion have only 12 different single bass notes  
(that can be executed using different registers) and assemble chords from  
only 12 different additional notes (again, multiplied by using different  
registers).

Today's instruments feature combination registers where single combination  
register keys establish a combination of reeds.  At the time this piece has  
been set, it was more customary to have single controls switching reeds  
individually on and off.  Switching a single reed could be done using the  
thumb without apparent disturbance visual and acoustic disturbance of play.

That explains that the instructions here call for playing several  
interspersed bass notes in a lower octave.  Note that the actual play  
button being pressed will remain the same: it is the registration that  
needs to be switched to the lower octave.

At any rate, the notation chosen is a single italic 8 below the bass note.   
Both the numbers as well as the italics distinguish the octavation from a  
fingering (seen elsewhere).

So at least for rendering this piece in LilyPond accurately in both visuals  
and Midi, being able to shrink an octavation mark to a single centered  
italic 8 would be called for.

Attachments:
        brahms.png  18.7 KB

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