<description>Sox echo audio effect</description>
<author>http://sox.sourceforge.net</author>
<parameter type="constant" name="gain-in" max="100" min="0" default="50" factor="100">
<description>Sox echo audio effect</description>
<author>http://sox.sourceforge.net</author>
<parameter type="constant" name="gain-in" max="100" min="0" default="50" factor="100">