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<h4 class="unnumberedsubsec">KeyChangeEvent</h4>
<p>Change the key signature.
<p>Syntax: <code>\key</code> <var>name</var> <var>scale</var>
<p>Event classes:
<a href="key_002dchange_002devent.fr.html#key_002dchange_002devent">key-change-event</a>, <a href="music_002devent.fr.html#music_002devent">music-event</a> and <a href="StreamEvent.fr.html#StreamEvent">StreamEvent</a>.
<p>Accepted by: <a href="Key_005fengraver.fr.html#Key_005fengraver">Key_engraver</a> and <a href="Key_005fperformer.fr.html#Key_005fperformer">Key_performer</a>.
<p>Properties:
<blockquote>
<dl>
<dt><code>name</code> (symbol):<dd>
<code>'KeyChangeEvent</code>
<p>Name of this music object.
<br><dt><code>to-relative-callback</code> (procedure):<dd>
<code>#<procedure #f (x p)></code>
<p>How to transform a piece of music
to relative pitches.
<br><dt><code>types</code> (list):<dd>
<code>'(general-music key-change-event event)</code>
<p>The types of this music object; determines by what
engraver this music expression is processed.
</dl>
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