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<refentry id="outiat">
<indexterm id="IndexOutiat"><primary>outiat</primary></indexterm>
<refentryinfo><title>Real-time MIDI:Output</title></refentryinfo>
<refmeta>
<refentrytitle>outiat</refentrytitle>
</refmeta>
<refnamediv>
<refname>outiat</refname>
<refpurpose>
Sends MIDI aftertouch messages at i-rate.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Sends MIDI aftertouch messages at i-rate.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis><command>outiat</command> ichn, ivalue, imin, imax</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>ichn</emphasis> -- MIDI channel number (1-16)
</para>
<para>
<emphasis>ivalue</emphasis> -- floating point value
</para>
<para>
<emphasis>imin</emphasis> -- minimum floating point value (converted in MIDI integer value 0)
</para>
<para>
<emphasis>imax</emphasis> -- maximum floating point value (converted in MIDI integer value 127 (7 bit))
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>outiat</emphasis> (i-rate aftertouch output) sends aftertouch messages. It works only with MIDI instruments which recognize them. It can drive a different value of a parameter for each note currently active.
</para>
<para>
It can scale an i-value floating-point argument according to the <emphasis>imin</emphasis> and <emphasis>imax</emphasis> values. For example, set <emphasis>imin</emphasis> = 1.0 and <emphasis>imax</emphasis> = 2.0. When the <emphasis>ivalue</emphasis> argument receives a 2.0 value, the opcode will send a 127 value to the MIDI OUT device. When the <emphasis>ivalue</emphasis> argument receives a 1.0 value, it will send a 0 value. i-rate opcodes send their message once during instrument initialization.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the outiat opcode. It uses the file <ulink url="examples/outiat.csd"><citetitle>outiat.csd</citetitle></ulink>.
<example>
<title>Example of the outiat 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/outiat.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="outic14"><citetitle>outic14</citetitle></link>,
<link linkend="outic"><citetitle>outic</citetitle></link>,
<link linkend="outipat"><citetitle>outipat</citetitle></link>,
<link linkend="outipb"><citetitle>outipb</citetitle></link>,
<link linkend="outipc"><citetitle>outipc</citetitle></link>,
<link linkend="outkat"><citetitle>outkat</citetitle></link>,
<link linkend="outkc14"><citetitle>outkc14</citetitle></link>,
<link linkend="outkc"><citetitle>outkc</citetitle></link>,
<link linkend="outkpat"><citetitle>outkpat</citetitle></link>,
<link linkend="outkpb"><citetitle>outkpb</citetitle></link>,
<link linkend="outkpc"><citetitle>outkpc</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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