<!-- Converted to DocBook/SGML by Kevin Conder -->
<refentry id="lpfreson">
  <refmeta>
    <refentrytitle>lpfreson</refentrytitle>
  </refmeta>
 
  <refnamediv>
    <refname>lpfreson</refname>
    <refpurpose>
      Modifies the spectrum of an audio signal with time-varying filter coefficients from a control file and frequncy ratio.
      <indexterm id="IndexLpfreson"><primary>lpfreson</primary></indexterm>
    </refpurpose>
  </refnamediv>
 
  <refsect1>
    <title>Description</title>
    <para>
      Modifies the spectrum of an audio signal with time-varying filter coefficients from a control file and frequncy ratio.
    </para>
  </refsect1>
 
  <refsect1>
    <title>Syntax</title>
    <synopsis>ar <command>lpfreson</command> asig, kfrqratio</synopsis>
 </refsect1>
 
  <refsect1>
    <title>Performance</title>
    <para>
      <emphasis>asig</emphasis> -- an audio signal to be modified.
    </para>

    <para>
      <emphasis>kfrqratio</emphasis> -- frequency ratio. Must be greater than 0.
    </para>

    <para>
      <emphasis>lpread</emphasis> gets its values from the control file according to the input value <emphasis>ktimpnt</emphasis> (in seconds). If <emphasis>ktimpnt</emphasis> proceeds at the analysis rate, time-normal synthesis will result; proceeding at a faster, slower, or variable rate will result in time-warped synthesis. At each k-period, <emphasis>lpread</emphasis> interpolates between adjacent frames to more accurately determine the parameter values (presented as output) and the filter coefficient settings (passed internally to a subsequent <emphasis>lpfreson</emphasis>).
    </para>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <link linkend="lpread"><citetitle>lpread</citetitle></link>,
      <link linkend="lpreson"><citetitle>lpreson</citetitle></link>
    </para>
  </refsect1>
</refentry>
