<p>
-Ardour 2.X supported <a href="midi_learn">MIDI learning</a> for more
+Ardour 2.X supported <a href="/using-control-surfaces/midi-learn">MIDI learning</a> for more
or less any control. This was a nice feature that quite a few other
DAWs have now provided, but it didn't allow Ardour to work "out of the
box" with sensible defaults for existing commercial MIDI