3 <img src="/images/gain-envelope1.png" alt="Default gain envelope">
4 <figcaption class=center>A typical gain envelope (green line).</figcaption>
8 In Ardour, every <dfn>region</dfn> has a <dfn>gain envelope</dfn>, which is
9 normally hidden. Clicking on the Draw tool will cause all the gain envelopes
10 on all regions to show themselves; these will appear as green lines with
11 square dots (<dfn>control points</dfn>) at the beginning and end of each
12 region. The vertical axis represents gain, with the top of the region
13 representing +6dB and the bottom representing approximately -170dB. By
14 default, the line starts and ends at 0dB; the control points can be moved up
15 and down to change the amount of gain at that point.
19 Gain follows the line between control points continuously during playback,
20 and adjusts the gain for that region accordingly. It is completely automatic,
21 unlike channel <a href="@@automation">automation</a>.
24 <h2 style="clear: both">Manipulating Gain Envelopes</h2>
27 The default gain curve, by itself, is not very useful; in order to have more
28 control over the shape of the gain envelope it is necessary to add extra
29 control points. To add a control point to the envelope, click anywhere in the
30 region where there are no existing control points; it will appear <em>on the
31 line</em> at the X-axis of the mouse's current position in the region.
35 <img src="/images/gain-envelope2.png" alt="Complex gain envelope">
36 <figcaption class=center>A more complex gain envelope.</figcaption>
40 Once added, a control point can be <kbd class=mouse>Left</kbd> clicked and
41 dragged to the desired location. Hovering over a control point will show its
42 current level in dB. To remove a control point, <kbd class=mouse>Left</kbd>
43 click it and press <kbd>Delete</kbd>, or <kbd class=mod3n></kbd><kbd
44 class=mouse>Right</kbd>-click on it.