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<refentry id="noteoff">
<indexterm id="IndexNoteoff"><primary>noteoff</primary></indexterm>
<refentryinfo><title>Real-time MIDI:Note Output</title></refentryinfo>
<refmeta>
<refentrytitle>noteoff</refentrytitle>
</refmeta>
<refnamediv>
<refname>noteoff</refname>
<refpurpose>
Send a noteoff message to the MIDI OUT port.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Send a noteoff message to the MIDI OUT port.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis><command>noteoff</command> ichn, inum, ivel</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>ichn</emphasis> -- MIDI channel number (1-16)
</para>
<para>
<emphasis>inum</emphasis> -- note number (0-127)
</para>
<para>
<emphasis>ivel</emphasis> -- velocity (0-127)
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>noteon</emphasis> (i-rate note on) and <emphasis>noteoff</emphasis> (i-rate note off) are the simplest MIDI OUT opcodes. <emphasis>noteon</emphasis> sends a MIDI noteon message to MIDI OUT port, and <emphasis>noteoff</emphasis> sends a noteoff message. A <link linkend="noteon"><citetitle>noteon</citetitle></link> opcode must always be followed by an <emphasis>noteoff</emphasis> with the same channel and number inside the same instrument, otherwise the note will play endlessly.
</para>
<para>
These <emphasis>noteon</emphasis> and <emphasis>noteoff</emphasis> opcodes are useful only when introducing a <link linkend="timout"><citetitle>timout</citetitle></link> statement to play a non-zero duration MIDI note. For most purposes, it is better to use <link linkend="noteondur"><citetitle>noteondur</citetitle></link> and <link linkend="noteondur2"><citetitle>noteondur2</citetitle></link>.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="noteon"><citetitle>noteon</citetitle></link>,
<link linkend="noteondur"><citetitle>noteondur</citetitle></link>,
<link linkend="noteondur2"><citetitle>noteondur2</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namegabriel;</member>
<member>Italy</member>
</simplelist>
</para>
<para>New in Csound version 3.47</para>
<para>Thanks goes to &namerasmus; for pointing out the correct MIDI channel and controller number ranges.</para>
</refsect1>
</refentry>
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