+ <li><kbd class="mouse mod3">left</kbd> clicking on a note adds the note to the
+ selection (for all regions on the track). See <a href="@@note-selection">Note
+ Selection</a>.</li>
+ <li><kbd class="mouse">middle</kbd> clicking a note clears the selection, selects
+ only the note.</li>
+</ul>
+
+<h2>Channel and Patch Selection</h2>
+
+<h3>The Channel Selector</h3>
+
+<figure class="right">
+<img src="/images/midi-chan-sel-dlg.png" alt="The MIDI channel control window">
+<figcaption class="center">The MIDI channel control window.</figcaption>
+</figure>
+
+<p>
+ A MIDI track's data may utilize any number of the 16 available <dfn>MIDI channels</dfn>, and it is useful to be able to filter out a subset of those or force the input or output to utilize only certain channels. The Channel Selector dialog allows for filtering or modification of both the input and output of any given MIDI track.
+</p>
+
+<p>
+ The Channel Selector dialog is activated by <kbd class="mouse">right</kbd>-clicking on a MIDI track's header and selecting <kbd class="menu">Channel Selector...</kbd> from the menu that appears. Filtering or modification of Inbound MIDI events for the given MIDI track is done by selecting among:
+</p>
+
+<ul>
+ <li><kbd class=menu>Record only selected channels</kbd></li>
+ <li><kbd class=menu>Force all channels to 1 channel</kbd></li>
+</ul>
+
+<p class="note">
+ Selecting <kbd class=menu>Record all channels</kbd> does no filtering of inbound MIDI events.
+</p>
+
+<p>
+ If simple filtering of incoming MIDI events is desired, <kbd class=menu>Record only selected channels</kbd> should be selected. A 1-by-16 grid of squares with numbers in them will become sensitive to mouse clicks, and the desired channels to be allowed through the filter can then be selected by clicking on them. Channels that are allowed to pass through will be highlighted in green.
+</p>
+
+<p>
+ <kbd class=menu>Force all channels to 1 channel</kbd> will rewrite the channel number of all incoming events of the selected MIDI track to whichever channel is highlighted in the 1-by-16 grid of squares. When this option is chosen, one and only one channel can be selected.
+</p>
+
+<p>
+ Filtering or modification of outbound MIDI events is done by selecting among:
+</p>
+
+<ul>
+ <li><kbd class=menu>Play only selected channels</kbd></li>
+ <li><kbd class=menu>Use a single fixed channel for all playback</kbd></li>