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<a name="MIDI-block"></a>
Next: <a rel="next" accesskey="n" href="What-goes-into-the-MIDI-output_003f.de.html#What-goes-into-the-MIDI-output_003f">What goes into the MIDI output?</a>,
Previous: <a rel="previous" accesskey="p" href="Creating-MIDI-files.de.html#Creating-MIDI-files">Creating MIDI files</a>,
Up: <a rel="up" accesskey="u" href="MIDI-output.de.html#MIDI-output">MIDI output</a>
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<h4 class="subsection">3.5.2 MIDI block</h4>
<p><a name="index-MIDI-block-2445"></a>
A <code>\midi</code> block must appear within a score block if MIDI output
is required. It is analogous to the layout block, but somewhat
simpler. Often, the <code>\midi</code> block is left empty, but it
can contain context rearrangements, new context definitions or code
to set the values of properties. For example, the following will
set the initial tempo exported to a MIDI file without causing a tempo
indication to be printed:
<pre class="example">\score {
<var>...music...</var>
\midi {
\context {
\Score
tempoWholesPerMinute = #(ly:make-moment 72 4)
}
}
}
</pre>
<p>In this example the tempo is set to 72 quarter note
beats per minute. This kind of tempo specification cannot take
a dotted note length as an argument. If one is required, break
the dotted note into smaller units. For example, a tempo of 90
dotted quarter notes per minute can be specified as 270 eighth
notes per minute:
<pre class="example">tempoWholesPerMinute = #(ly:make-moment 270 8)
</pre>
<p><a name="index-MIDI-context-definitions-2446"></a>
Context definitions follow precisely the same syntax as those
within a <code>\layout</code> block. Translation modules for sound are
called performers. The contexts for MIDI output are defined in
<samp><span class="file">../ly/performer-init.ly</span></samp>,
see <a name="index-Other-sources-of-information-2447"></a><a href="../lilypond-learning/Other-sources-of-information.de.html#Other-sources-of-information">Other sources of information</a>.
For example, to remove the effect of dynamics
from the MIDI output, insert the following lines in the
<code>\midi{ }</code> block.
<pre class="example">\midi {
...
\context {
\Voice
\remove "Dynamic_performer"
}
}
</pre>
<p>MIDI output is created only when a <code>\midi</code> block is included
within a score block defined with a <code>\score</code> command. If it
is placed within an explicitly instantiated score context (i.e.
within a <code>\new Score</code> block) the file will fail. To solve
this, enclose the <code>\new Score</code> and the <code>\midi</code> commands
in a <code>\score</code> block.
<pre class="example">\score {
\new Score { ...notes... }
\midi { }
}
</pre>
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Next: <a rel="next" accesskey="n" href="What-goes-into-the-MIDI-output_003f.de.html#What-goes-into-the-MIDI-output_003f">What goes into the MIDI output?</a>,
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