change the vertical scale of the graphs.
</p>
+<h2>MIDI instruments specificities</h2>
+
+<figure>
+ <img src="/images/instrument_plugins-keyboard.png" alt="The MIDI keyboard in instruments plugins">
+ <figcaption>
+ The MIDI keyboard in instruments plugins
+ </figcaption>
+</figure>
+
+<p>
+ The generic UI provides, for all MIDI instruments plugins, a keyboard, that can
+ be used either with the mouse, or by using a QWERTY keyboard as a piano. Both the
+ channel and the velocity can be set above the keyboard.
+</p>