git-svn-id: svn://localhost/ardour2/branches/3.0@11111 d708f5d6-7413-0410-9779-e7cbd77b26cf
152 lines
5.7 KiB
XML
152 lines
5.7 KiB
XML
<?xml version="1.0" standalone="no"?>
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<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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]>
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<section id="sn-working-with-layers">
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<title>Working with layers</title>
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<para>
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It is possible to arrange regions in a playlist (track) so that they
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overlap - one starts before another finishes, for example. Because of
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this, its important that there is a clear and understandable rule for
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what you will hear when playing back these kinds of region arrangements.
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</para>
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<para>
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Every region in a playlist is assigned to a layer. There can only ever
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be one region on a given layer, although rearranging the playlist
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(track) may change which region is on which layer. At any given point
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along the timeline, you will hear the uppermost region at that point.
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</para>
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<para>
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Of course, nothing in digital audio is ever quite that simple, and so of
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course there are some complications:
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</para>
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<section id="layers-crossfades">
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<title> Crossfades </title>
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<para>
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Whenever two regions overlap, there is the potential for a
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<link linkend="sn-working-with-crossfades">crossfade</link> between
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them. If the crossfade is not muted, then you will hear the contents
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of the crossfade during the overlap, not just the uppermost region.
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</para>
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</section>
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<section id="region-opacity">
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<title> Region Opacity </title>
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<para>
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In a perverse nod to image manipulation programs, Ardour allows you to
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make regions transparent. By default, all regions are created opaque,
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which means that when they are playing, no region below them are
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audible. However, if you change the region to be transparent, the
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region will be audible together with any regions below it. This
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capability should probably not be abused - if you really want to mix
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sounds together in this way, they should probably live in their own
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tracks. Occasionally though, this can be useful trick.
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</para>
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<para>
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To change the opacity of a region, popup the region's editor,
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accessible by context clicking on the region. Then click on the
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"opaque" button, turning it on or off as desired.
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</para>
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</section>
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<section id="layering-styles">
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<title> Layering Styles </title>
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<para>
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When you are recording new material for a track, its typical to want
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to new material recorded "over" existing material in the track to be
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what you hear on playback. For example, if you overdub part of a
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guitar solo, you normally want the overdub to be audible, not hidden
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by the old version that was already there. By contrast, when editing
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using splitting/trimming/moving of regions to create a particular
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arrangement along the timeline, many people find that they want
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regions that start later on the timeline to be the ones that are
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audible.
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</para>
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<para>
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To facilitate these two contradictory desires, Ardour features three
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different styles for assigning regions to layers.
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</para>
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<variablelist>
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<title></title>
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<varlistentry>
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<term>Most recently added regions are higher</term>
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<listitem>
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<para>
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Use this style when recording/overdubbing new material. Edits of
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any kind do not modify the layering.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>Most recently added/moved/trimmed regions are higher</term>
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<listitem>
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<para>
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Use this style when recording/overdubbing new material, but you
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want basic edits to cause regions to rise to the top.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>Later regions are higher</term>
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<listitem>
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<para>
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Use this style when rearranging and editing regions.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>
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A new session has the layering style set to "Most recently
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added/moved/trimmed regions are higher". To change the layering style,
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open the <emphasis>options editor</emphasis> and select the
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"Layers&Fades" page. There is an option there to select the style
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you want. Layering style may be changed at any time. The existing
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layering of all playlists is not changed when changing the layering
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model.
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</para>
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</section>
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<section id="modifying-layering-by-hand">
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<title> Modifying Layering By Hand </title>
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<para>
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If you want a particular region to be the uppermost when the current
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layering style has put it on a lower layer, context click on the
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region. Select the region from the menu that pops up, and in the
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submenu that appears, choose one of "Move region to lowest layer" or
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"Move region to upper layer". The layering for the playlist will be
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recalculated to ensure that the region is on the layer you chose.
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Note: these operations only have any effect if using one of the "Most
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recently .." layer models.
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</para>
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<para>
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You can see the precise layer a region is assigned in the popup region
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editor, accessible by context clicking on the region.
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</para>
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<note>
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<para>
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At one time, Ardour offered more explicit control over the layering,
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allowing you to move regions up or down to specific layers. This was
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found to be problematic, confusing, and generally rendered
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unnecessary by both of the layering styles the program now offers.
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</para>
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</note>
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</section>
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