<!-- Converted to DocBook/SGML by Kevin Conder -->
<refentry id="noteondur">
  <refmeta>
    <refentrytitle>noteondur</refentrytitle>
  </refmeta>
 
  <refnamediv>
    <refname>noteondur</refname>

    <refpurpose>
      Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
      <indexterm id="IndexNoteondur"><primary>noteondur</primary></indexterm>
    </refpurpose>
  </refnamediv>
 
  <refsect1>
    <title>Description</title>
    <para>
      Sends a noteon and a noteoff MIDI message both with the same channel, number and velocity.
    </para>
  </refsect1>
 
  <refsect1>
    <title>Syntax</title>
    <synopsis><command>noteondur</command> ichn, inum, ivel, idur</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>

    <para>
      <emphasis>idur</emphasis> -- how long, in seconds, this note should last.
    </para>
  </refsect1>
 
  <refsect1>
    <title>Performance</title>
    <para>
      <emphasis>noteondur</emphasis> (i-rate note on with duration) sends a noteon and a noteoff MIDI message both with the same channel, number and velocity. Noteoff message is sent after <emphasis>idur</emphasis> seconds are elapsed by the time <emphasis>noteondur</emphasis> was active.
    </para>

    <para>
      <emphasis>noteondur</emphasis> differs from <emphasis>noteondur2</emphasis> in that <emphasis>noteondur</emphasis> truncates note duration when current instrument is deactivated by score or by real-time playing, while <emphasis>noteondur2</emphasis> will extend performance time of current instrument until <emphasis>idur</emphasis> seconds have elapsed. In real-time playing, it is suggested to use <emphasis>noteondur</emphasis> also for undefined durations, giving a large <emphasis>idur</emphasis> value.
    </para>

    <para>
      Any number of <emphasis>noteondur</emphasis> opcodes can appear in the same Csound instrument, allowing chords to be played by a single instrument.
    </para>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <link linkend="noteoff"><citetitle>noteoff</citetitle></link>,
      <link linkend="noteon"><citetitle>noteon</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>
