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

    <refpurpose>
      Converts a k-rate parameter to an a-rate value with interpolation.
      <indexterm id="IndexA"><primary>a</primary></indexterm>
    </refpurpose>
  </refnamediv>
 
  <refsect1>
    <title>Description</title>
    <para>
      Converts a k-rate parameter to an a-rate value with interpolation.
    </para>
  </refsect1>
 
  <refsect1>
    <title>Syntax</title>
    <synopsis><command>a</command>(x) (control-rate args only)</synopsis>

    <para>
      where the argument within the parentheses may be an expression. Value converters perform arithmetic translation from units of one kind to units of another. The result can then be a term in a further expression.
    </para>
  </refsect1>

  <refsect1>
    <title>Examples</title>
    <para>
      Here is an example of the a opcode. It uses the files <ulink url="examples/a.orc"><citetitle>a.orc</citetitle></ulink> and <ulink url="examples/a.sco"><citetitle>a.sco</citetitle></ulink>.

      <example>
        <title>Example of the a opcode.</title>

        <programlisting>
<inlinemediaobject>
            <imageobject>
              <imagedata fileref="examples/a.orc" format="linespecific">
            </imageobject>
          </inlinemediaobject>
        </programlisting>

        <programlisting>
<inlinemediaobject>
            <imageobject>
              <imagedata fileref="examples/a.sco" format="linespecific">
            </imageobject>
          </inlinemediaobject>
        </programlisting>
      </example>
    </para>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <link linkend="opi"><citetitle>i</citetitle></link>
    </para>
  </refsect1>

  <refsect1>
    <title>Credits</title>
    <para>Author: &namegabriel;</para>
    <para>Example written by &namekevin;.</para>
    <para>New in version 4.21</para>
  </refsect1>
</refentry>
