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