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\chapter{Staff Size} \index{staff size}\label{staffspacing}
In contrast with the prior section, here we describe how to change the sizes
of everything...staff, notes, and all other symbols. In
Section~\ref{whatspecify} we saw how to set the size for all instruments at
the start of a score. Any one of the same macros---\verb|\normalmusicsize|,
\verb|\smallmusicsize|, \verb|\largemusicsize|, or
\verb|\Largemusicsize|---can be used to change the size of all instruments
midway through a score, but in this case it must come between
\verb|\stoppiece| and \verb|\startpiece|.
Once the overall staff size is set, you can alter the size of any desired
instrument with the macro \keyindex{setsize}\itbrace{n}\itbrace{s}, where
$n$ is the instrument number and $s$ is a factor by which the size is to be
changed from the prevailing overall size. There are five predefined macros
that should be used for the size factor $s$. Their names and respective values
are \keyindex{normalvalue}~($1.0$), \keyindex{smallvalue}~($0.80$),
\keyindex{tinyvalue}~($0.64$), \keyindex{largevalue}~($1.2$), and
\keyindex{Largevalue}~($1.44$). \musixtex\ should not crash if you use an
explicit number different from any of these, but the result may be
less than satisfactory.
Once again, if used at the beginning of a piece, the \verb|\setsize| macro
must precede \verb|\startpiece| (not \verb|\contpiece|), and if used after
the beginning, must be preceded by \verb|\stoppiece|.
As an example, we give two bars of the \ital{Ave Maria} by Charles {\sc
Gounod}\index{Gounod, C.@{\sc Gounod, C.}}, based on the first prelude of
J. S. Bach's \ital{Well Tempered Clavier}, as transcribed for
organ, violin and voice by Markus {\sc Veittes}:\label{avemaria}
\begin{music}
\def\oct{\advance\transpose by 7}
\def\liftqs#1{\raise#1\Interligne\qs}
\parindent0pt
\sepbarrules
\instrumentnumber{3}
\generalmeter{\meterC}
\setinterinstrument2{3\Interligne}
\setsize3\tinyvalue
\setsize2\tinyvalue
\setclef1\bass
\setstaffs1{2}
\startpiece\addspace\afterruleskip
%Takt 9
\notes\zhl c\liftqs6\qupp e|\ds&\oct
\itieu5h\hl h&\tx ~~~gra---*\itied4h\hu h\en
\notes|\ibbl0j3\qb0h\tqb0l\en
\notes|\ibbl1k0\qb1{ohl}\tqb1o\en
\notes\zhl c\liftqs6\qupp e|\ds&\oct
\ttie5\ibl4c0\qb4h&\ttie4\ibu5g{-3}\qb5h\en
\notes|\ibbl0j3\qb0h\tqb0l&\oct\qb4a&\tx ---*\tqh5a\en
\notes|\ibbl1k0\qb1o\qb1h&\oct\qb4b&\tx ~~ti~-*\cu b\en
\notes|\qb1l\tqb1o&\oct\tqb4c&\tx a*\cu c\en
\bar
%Takt 10
\notes\zhl c\liftqs6\qupp d|\ds&\oct
\qlp d&\tx ~~~ple---*\ibsluru4e\qup d\en
\notes|\ibbu1g3\bigaccid\qb1{^f}\tqh1h\en
\notes|\ibbu2i0\qb2k\qb2f\en
\notes|\qb2h\tqh2k&\oct\cl e&\tubslur4f\cu e\en
\notes\zhl c\liftqs6\qupp d|\ds&\oct\ql d&\tx na,*\qu d\en
\notes|\ibbu1g3\qb1f\tqh1h\en
\notes|\ibbu2i0\qb2{kfh}\tqh2k&\qp&\qp\en
\endpiece
\end{music}
This example was coded as:
\begin{quote}\begin{verbatim}
\def\oct{\advance\transpose by 7}
\def\liftqs#1{\raise#1\Interligne\qs}
\parindent0pt
\sepbarrules
\instrumentnumber{3}
\generalmeter{\meterC}
\setinterinstrument2{3\Interligne}
\setsize3\tinyvalue
\setsize2\tinyvalue
\setclef1\bass
\setstaffs1{2}
\startpiece\addspace\afterruleskip
%Takt 9
\notes\zhl c\liftqs6\qupp e|\ds&\oct
\itieu5h\hl h&\tx ~~~gra---*\itied4h\hu h\en
\notes|\ibbl0j3\qb0h\tqb0l\en
\notes|\ibbl1k0\qb1{ohl}\tqb1o\en
\notes\zhl c\liftqs6\qupp e|\ds&\oct
\ttie5\ibl4c0\qb4h&\ttie4\ibu5g{-3}\qb5h\en
\notes|\ibbl0j3\qb0h\tqb0l&\oct\qb4a&\tx ---*\tqh5a\en
\notes|\ibbl1k0\qb1o\qb1h&\oct\qb4b&\tx ~~ti~-*\cu b\en
\notes|\qb1l\tqb1o&\oct\tqb4c&\tx a*\cu c\en
\bar
%Takt 10
\notes\zhl c\liftqs6\qupp d|\ds&\oct
\qlp d&\tx ~~~ple---*\ibsluru4e\qup d\en
\notes|\ibbu1g3\bigaccid\qb1{^f}\tqh1h\en
\notes|\ibbu2i0\qb2k\qb2f\en
\notes|\qb2h\tqh2k&\oct\cl e&\curve222\tubslur4f\cu e\en
\notes\zhl c\liftqs6\qupp d|\ds&\oct\ql d&\tx na,*\qu d\en
\notes|\ibbu1g3\qb1f\tqh1h\en
\notes|\ibbu2i0\qb2{kfh}\tqh2k&\qp&\qp\en
\endpiece
\end{verbatim}\end{quote}
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