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<p>
<a name="Simple-substitution-functions"></a>
Next: <a rel="next" accesskey="n" href="Paired-substitution-functions.de.html#Paired-substitution-functions">Paired substitution functions</a>,
Previous: <a rel="previous" accesskey="p" href="Overview-of-music-functions.de.html#Overview-of-music-functions">Overview of music functions</a>,
Up: <a rel="up" accesskey="u" href="Music-functions.de.html#Music-functions">Music functions</a>
<hr>
</div>
<h4 class="subsection">6.1.2 Simple substitution functions</h4>
<p>Here is a simple example,
<blockquote>
<pre class="verbatim">
padText = #(define-music-function (parser location padding) (number?)
#{
\once \override TextScript #'padding = #$padding
#})
\relative c''' {
c4^"piu mosso" b a b
\padText #1.8
c4^"piu mosso" d e f
\padText #2.6
c4^"piu mosso" fis a g
}
</pre>
<p>
<a href="../0c/lily-4c36592f.ly">
<img align="middle"
border="0" src="../0c/lily-4c36592f.png" alt="[image of music]">
</a>
</p>
</blockquote>
<p>Music expressions may be substituted as well,
<blockquote>
<pre class="verbatim">
custosNote = #(define-music-function (parser location note)
(ly:music?)
#{
\once \override Voice.NoteHead #'stencil =
#ly:text-interface::print
\once \override Voice.NoteHead #'text =
\markup \musicglyph #"custodes.mensural.u0"
\once \override Voice.Stem #'stencil = ##f
$note
#})
{ c' d' e' f' \custosNote g' }
</pre>
<p>
<a href="../79/lily-f752eea0.ly">
<img align="middle"
border="0" src="../79/lily-f752eea0.png" alt="[image of music]">
</a>
</p>
</blockquote>
<p>Multiple variables may be used,
<blockquote>
<pre class="verbatim">
tempoMark = #(define-music-function (parser location padding marktext)
(number? string?)
#{
\once \override Score . RehearsalMark #'padding = $padding
\once \override Score . RehearsalMark #'extra-spacing-width = #'(+inf.0 . -inf.0)
\mark \markup { \bold $marktext }
#})
\relative c'' {
c2 e
\tempoMark #3.0 #"Allegro"
g c
}
</pre>
<p>
<a href="../26/lily-de66f589.ly">
<img align="middle"
border="0" src="../26/lily-de66f589.png" alt="[image of music]">
</a>
</p>
</blockquote>
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<p>
Next: <a rel="next" accesskey="n" href="Paired-substitution-functions.de.html#Paired-substitution-functions">Paired substitution functions</a>,
Previous: <a rel="previous" accesskey="p" href="Overview-of-music-functions.de.html#Overview-of-music-functions">Overview of music functions</a>,
Up: <a rel="up" accesskey="u" href="Music-functions.de.html#Music-functions">Music functions</a>
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