Mention the General MIDI synth

include/bundled-plugins-instruments.html

@@ -6,7 +6,7 @@
 </p>
 
 <figure>
-  <img style="width:50%;" src="/images/a-fluidsynth.png" alt="ACE Fluid Synth">
+  <img style="width:75%;" src="/images/a-fluidsynth.png" alt="ACE Fluid Synth">
   <figcaption>
     ACE Fluid Synth
   </figcaption>
@@ -37,6 +37,24 @@
   triangle.</li>
 </ul>
 
+<h2>General MIDI Synth</h2>
+
+<p>
+  This is a convenience plugin for playing standard MIDI files. It uses the
+  FluidSynth engine and the GeneralUser GS soundfont by S. Christian Collins.
+  The plugin comes with a MIDI map for simple patch selection in the user
+  interface. General MIDI Synth was developed outside Ardour and comes bundled
+  with it as 3rd party software in the official builds available from Ardour's
+  website.
+</p>
+
+<figure>
+  <img style="width:75%;" src="/images/general-midi-synth.png" alt="General MIDI Synth">
+  <figcaption>
+    General MIDI Synth
+  </figcaption>
+</figure>
+
 <h2>ACE Reasonable Synth</h2>
 
 <p>