+<p>
+ <dfn><abbr title="Musical Instrument Digital Interface">MIDI</abbr></dfn> is
+ a way to describe musical performances and to control music hardware and
+ software.
+</p>
+<p>
+ Ardour can import and record MIDI data, and perform a variety of editing
+ operations on it. Furthermore, MIDI can be used to control various functions
+ of Ardour.
+</p>
+<h2>MIDI Handling Frameworks</h2>
+
+<p>
+ MIDI input and output for Ardour are handled internally by the same "engine" that
+ handles audio input and output. However, Ardour can use as many MIDI devices
+ as the system can see as there are no syncing difficulties as there would be with audio.
+</p>
+
+<table class="dl">
+ <tr><th>OS X</th>
+ <td><dfn>CoreMIDI</dfn> is the standard MIDI framework on OSX systems.</td></tr>
+ <tr><th>Linux</th>
+ <td><dfn><abbr title="Advanced Linux Sound API">ALSA</abbr> MIDI</dfn> is the
+ standard MIDI framework on Linux systems.</td></tr>
+ <tr><th>Windows</th>
+ <td><dfn><abbr title="Microsoft Multimedia Environment">MME</abbr></dfn> is the standard
+ MIDI framework on Windows systems.</td></tr>
+</table>
+
+<p class="note">
+ <dfn><abbr title="JACK Audio Connection Kit">JACK</abbr></dfn> is an
+ alternate audio system which Ardour can utilize for both audio and
+ MIDI. JACK is used to route audio between independent applications,
+ and is now considered an advanced use case which is not recommended
+ for most users. Users with a need to use JACK for audio routing
+ should consult the latest documentation at
+ the <a href="https://jackaudio.org/">JACK website</a>.
+</p>