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<refentry id="midiin">
<indexterm id="IndexMidiin"><primary>midiin</primary></indexterm>
<refentryinfo><title>Real-time MIDI:Generic I/O</title></refentryinfo>
<refmeta>
<refentrytitle>midiin</refentrytitle>
</refmeta>
<refnamediv>
<refname>midiin</refname>
<refpurpose>
Returns a generic MIDI message received by the MIDI IN port.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Returns a generic MIDI message received by the MIDI IN port
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>kstatus, kchan, kdata1, kdata2 <command>midiin</command></synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>kstatus</emphasis> -- the type of MIDI message. Can be:
<itemizedlist>
<listitem><para>128 (note off)</para></listitem>
<listitem><para>144 (note on)</para></listitem>
<listitem><para>160 (polyphonic aftertouch)</para></listitem>
<listitem><para>176 (control change)</para></listitem>
<listitem><para>192 (program change)</para></listitem>
<listitem><para>208 (channel aftertouch)</para></listitem>
<listitem><para>224 (pitch bend</para></listitem>
<listitem><para>0 if no MIDI message are pending in the MIDI IN buffer</para></listitem>
</itemizedlist>
</para>
<para>
<emphasis>kchan</emphasis> -- MIDI channel (1-16)
</para>
<para>
<emphasis>kdata1, kdata2</emphasis> -- message-dependent data values
</para>
<para>
<emphasis>midiin</emphasis> has no input arguments, because it reads at the MIDI in port implicitly. It works at k-rate. Normally (i.e., when no messages are pending) <emphasis>kstatus</emphasis> is zero, only when MIDI data are present in the MIDI IN buffer, is <emphasis>kstatus</emphasis> set to the type of the relevant messages.
</para>
<note>
<para>
Be careful when using <emphasis>midiin</emphasis> in low numbered instruments, since a MIDI note will launch additional instances of the instrument, resulting in duplicate events and weird behaviour. Use <link linkend="massign"><citetitle>massign</citetitle></link> to direct MIDI note on messages to a different instrument or to disable triggering of instruments from MIDI.
</para>
</note>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the midiin opcode. It uses the file <ulink url="examples/midiin.csd"><citetitle>midiin.csd</citetitle></ulink>.
<example>
<title>Example of the midiin opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/midiin.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namegabriel;</member>
<member>Italy</member>
<member>1998</member>
</simplelist>
</para>
<para>New in Csound version 3.492</para>
</refsect1>
</refentry>
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