manual/include/working-with-ardour-built-plugin-editors.html

<p>
  The plugin editor can be shown by double-clicking on the plugin within the
  <a href="@@processor-box">processor box</a>.
  A new window will appear showing the editor/GUI for the plugin.
</p>

<figure class="right">
  <img class="mini" style="width:400px;" src="/images/exemple-plugin.png" alt="A generic plugin Editor (A-Eq)">
  <figcaption>
    A generic plugin Editor (A-Eq)
    <ol>
      <li>Parameters</li>
      <li>Description</li>
      <li>Analysis graph</li>
    </ol>
  </figcaption>
</figure>

<h2>Generic Plugin Editor</h2>

<p>
  If a plugin does not have its own GUI, Ardour will construct a
  <dfn>generic plugin editor</dfn> from a small set of common control
  elements. Ardour will do this even for plugins that have their
  own, if <kbd class="menu">Edit &gt; Preferences &gt;
  GUI &gt; Use Plugins' own interface instead of Ardour's</kbd> is disabled.
</p>

<p>
  The generic UI can be temporarily switched to by <kbd class="mouse">right</kbd> clicking on
  a processor and selecting <kbd class="menu">Edit with generic controls</kbd>.
  This is necessary in order to access the <a href="@@automation">plugin
  automation controls</a>.
</p>

<p>
  In the generic UI, any controller can be reset to its default state by
  <kbd class=mod3n></kbd><kbd class=mouse>Left</kbd>-clicking on it.
</p>

<h2>Analysis Graph</h2>

<p>
  At the bottom of the generic plugin editor, clicking the arrow displays the
  <dfn>Analysis Graph</dfn>.
</p>
<p>
  This graph displays:
</p>
<ul>
  <li>the <span style="background-color:black; color:white;">transfer function</span> in white,</li>
  <li>the <span style="background-color:black; color:red;">phase response</span> in red (optional),</li>
  <li>the <span style="background-color:black; color:green;">post effect spectrum</span> in green.</li>
</ul>

<p>
  The <dfn>transfer function</dfn> plots the output amplitude of the plugin (considered
  as a "black box") against its input amplitude, along the audio spectrum.
</p>
<p>
  The <dfn>phase response</dfn>, that can be switched on or off using the
  <kbd class="option">Show phase</kbd> checkbox, plots the phase of the
  plugins output against its input phase, along the audio spectrum. The scale is
  shown in <span style="background-color:black; color:yellow;">yellow</span> on
  the right.
</p>
<p>
  The green spectrum plots the <dfn>output signal spectrum</dfn>, after the plugin
  (for tracks that have a signal on).
</p>
<p>
  The <kbd class="menu">dB scale</kbd> selector in the bottom left allows to
  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>