manual/_manual/12_working-with-plugins/03_processor-box.html

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---
layout: default
title: Processor Box
---
<p>
In Ardour terminology, a <dfn>processor</dfn> is anything which treats the
signal in some way and gets plugged into a mixer strip.
Ardour provides several builtin processors such as the fader or panners.
Processors can also be <dfn>plugins</dfn> used for effects or as instruments, as well
as sends or inserts which are affect <a href="/signal-routing/">signal
routing</a>.<br />
The arrangement of processors is arbitrary, and there is no limit to how
many there can be.
</p>
<p>
The main box in the top half of a mixer strip shows the <dfn>processor
box</dfn>.
Processors are shown as coloured rectangles, with a small "LED" beside
them that lights up when the processor is enabled. The colour of the
processor depends on its location in the sequence; processors that are <dfn>pre-fader</dfn> are
coloured in red, and <dfn>post-fader</dfn> processors are coloured green
(in the default theme).</p>
<p>
The processor box will always contain a blue <dfn>Fader</dfn> processor.
This indicates where in the processor chain the main channel fader is
located &mdash; this is the fader shown in the lower half of the strip.
</p>
<h2>Adding Processors</h2>
<p>
Processors can be added to the chain by
<kbd class="mouse">Right</kbd>-clicking in the processor list, This does three things:
</p>
<ul>
<li>A gap is opened up to indicate the location of the click. The gap
shows where any new processors will be inserted.</li>
<li>The processor under the click is selected.</li>
<li>An options menu is presented.</li>
</ul>
<p>
From the menu, new processors can be inserted.
</p>
<h2>To Reorder (Move) Processors</h2>
<p>
Processors can be re-ordered using drag-and-drop. Dragging a processor
allows it to be moved around within the chain, or copied to another
processor list on another track or bus.
</p>
<h2>To Enable/Disable a Processor</h2>
<p>
To the left of the name of each processor is a small LED symbol; if this
is lit-up, the processor is active. Clicking on it will deactivate the
processor and effectively bypass it.</p>
<h2>Removing Processors</h2>
<p>
Context-click on the processor you want to remove, and select <kbd
class="menu">Delete</kbd>, or <kbd class="mod3 mouse">Right</kbd>-click on it.
</p>