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+<?xml version="1.0" standalone="no"?>
+
+<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
+
+<!ENTITY % BOOK_ENTITIES SYSTEM "./entities.ent">
+%BOOK_ENTITIES;
+
+]>
+
+<section id="sn-invert-polarity">
+ <title>Inverting the Polarity of a Track</title>
+ <para>
+ The polarity of a track can be inverted in the Mixer Window by clicking
+ on the track name button of a Mixer Strip and choosing
+ <menuchoice><guimenu>Invert Polarity</guimenu></menuchoice>.
+ </para>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="images/invert_polarity.png"/>
+ </imageobject>
+ </mediaobject>
+ <para>
+ When the polarity of a track is inverted a <literal>Ø</literal> will
+ appear before the track name in the Mixer Strip.
+ </para>
+
+ <para>
+ This could be used to correct the polarity of an input signal due to
+ incorrect wiring or to prevent two signals that are out of phase with
+ respect to each other resulting in cancellation when mixing.
+ </para>
+<!--
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="Some_Subsection.xml" />
+ -->
+</section>