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<a name="Using-variables"></a>
Next: <a rel="next" accesskey="n" href="Using-tags.fr.html#Using-tags">Using tags</a>,
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<h5 class="unnumberedsubsubsec">Using variables</h5>
<p><a name="index-variables_002c-use-of-2421"></a>
If sections of the music are defined in variables they can be
reused in different parts of the score, see <a name="index-Organizing-2422"></a>pieces with variables
<a href="../lilypond-learning/Organizing-pieces-with-variables.fr.html#Organizing-pieces-with-variables">Organizing pieces with variables</a>. For example, an <var>a cappella</var>
vocal score frequently includes a piano reduction of the parts
for rehearsal purposes which is identical to the vocal music, so
the music need be entered only once. Music from two variables
may be combined on one staff, see <a href="Automatic-part-combining.fr.html#Automatic-part-combining">Automatic part combining</a>.
Here is an example:
<blockquote>
<pre class="verbatim">
sopranoMusic = \relative c'' { a4 b c b8( a)}
altoMusic = \relative g' { e4 e e f }
tenorMusic = \relative c' { c4 b e d8( c) }
bassMusic = \relative c' { a4 gis a d, }
allLyrics = \lyricmode {King of glo -- ry }
<<
\new Staff = "Soprano" \sopranoMusic
\new Lyrics \allLyrics
\new Staff = "Alto" \altoMusic
\new Lyrics \allLyrics
\new Staff = "Tenor" {
\clef "treble_8"
\tenorMusic
}
\new Lyrics \allLyrics
\new Staff = "Bass" {
\clef "bass"
\bassMusic
}
\new Lyrics \allLyrics
\new PianoStaff <<
\new Staff = "RH" {
\set Staff.printPartCombineTexts = ##f
\partcombine
\sopranoMusic
\altoMusic
}
\new Staff = "LH" {
\set Staff.printPartCombineTexts = ##f
\clef "bass"
\partcombine
\tenorMusic
\bassMusic
}
>>
>>
</pre>
<p>
<a href="../c6/lily-0803a48b.ly">
<img align="middle"
border="0" src="../c6/lily-0803a48b.png" alt="[image of music]">
</a>
</p>
</blockquote>
<p>Separate scores showing just the vocal parts or just the piano
part can be produced by changing just the structural statements,
leaving the musical notation unchanged.
<p>For lengthy scores, the variable definitions may be placed in
separate files which are then included, see <a href="Including-LilyPond-files.fr.html#Including-LilyPond-files">Including LilyPond files</a>.
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