Add a section on muting tracks

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@3554 d708f5d6-7413-0410-9779-e7cbd77b26cf

manual/xml/muting_tracks.xml

@@ -0,0 +1,36 @@
+<?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-muting-tracks">
+  <title>Muting Tracks</title>
+  <indexterm>
+    <primary>Tracks</primary>
+    <secondary>Muting</secondary>
+  </indexterm>
+  <para>
+    A track can be muted by clicking on the <guibutton>m</guibutton> button
+    in the &TRACK_CONTROLS; or the <guibutton>mute</guibutton> button in a
+    tracks &MIXER_STRIP;. Muting a track will silence its output,
+    right-clicking on a mute button will bring up a pop-up menu that will
+    allow you to choose what will be affected by the mute button.
+  </para>
+  <mediaobject>
+    <imageobject>
+      <imagedata fileref="images/mute_options.png"/>
+    </imageobject>
+  </mediaobject>
+<!-- 
+  A more indepth description needed or perhaps a reference to a section i
+  on advanced mixing.
+  -->
+<!--
+	<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
+		href="Some_Subsection.xml" />
+	-->
+</section>

manual/xml/tracks_and_busses.xml

@@ -11,7 +11,6 @@
     most important objects in Ardour. They represent the fundamental way to
     playback and record audio, MIDI, and image data.
   </para>
-
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
 		href="signal_flow.xml" />
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
@@ -93,10 +92,10 @@
     <title>I/O Configuration</title>
     <para></para>
   </section>
-
+  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
+		href="muting_tracks.xml" />
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
 		href="soloing_tracks.xml" />
-
   <section id="track-display-size">
     <title>Track Display Size</title>
     <para>
@@ -116,7 +115,6 @@
       <para></para>
     </section>
   </section>
-
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
 		href="track_edit_groups.xml" />
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"