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livetrax/manual/xml/editing_concepts.xml

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<?xml version="1.0" standalone="no"?>
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
]>
<section id="sn-editing-concepts">
<title>Editing Concepts</title>
<para>
In Ardour, "editing" describes the process of
</para>
<itemizedlist>
<listitem>
<para>
making modifications to playlists. Recall that
<glossterm linkend="gt-playlist">playlists</glossterm> are nothing
more than lists of
<glossterm linkend="gt-region">regions</glossterm> arranged over
time.
</para>
</listitem>
<listitem>
<para>
recording/modifying automation data
</para>
</listitem>
</itemizedlist>
<section id="editing-cut-copy-paste">
<title> Cut/Copy/Paste </title>
<para></para>
</section>
<section id="sn-snap-settings">
<title>Snap Settings</title>
<para>
By default, when you move objects around, they move freely. There
<emphasis>is</emphasis> a "granularity" to the motion, but it is a
single audio frame (so typically on the order of 1/48000'th or
1/96000'th of a second), and at most zoom levels it will not be
apparent in any way.
</para>
<para>
However, this is not always the way you want to move some kinds of
objects. If you are working with structured compositions that utilize
traditional concepts of bars, beats, rythmn and so forth, you will
often want to move regions so that that they always align to specific
periodic time points that correspond to the start of a bar, or a beat
etc. If you are working on a movie soundtrack, you may prefer to have
regions always align to SMPTE frames, or perhaps even to whole
seconds.
</para>
<para>
Ardour provides a wide variety of "snap" settings. If any but "None"
is selected, they define a grid of timepoints which will be used to
"snap" object positions as they are dragged. The grid can be regular
(as is the case if you choose "Beats", for example), or it can be
completely irregular (if you choose "Marks", for example). It can even
consist of a <emphasis>single</emphasis> timepoint (if you choose
"Edit cursor", for example).
</para>
<para>
Regions are a somewhat special case in that they may contain <emphasis>
sync points</emphasis>. If a region contains a sync point, the region start
position is ignored and the sync point is aligned to the grid. This allows
you to align a 'hit point' to the desitred grid.
</para>
<variablelist>
<title> Possible Snap Settings </title>
<varlistentry>
<term><guilabel>None</guilabel></term>
<listitem>
<para>
no alignment used at all
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> CD Frames</guilabel></term>
<listitem>
<para>
align to 1/75th of a second intervals, as defined by the
"Redbook" Audio CD standards
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> SMPTE Frames</guilabel></term>
<listitem>
<para>
align to whatever the current SMPTE frame interval is (defined
in the options editor)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> SMPTE Seconds</guilabel></term>
<listitem>
<para>
align to whole seconds, adjusted to account for any SMPTE start
offset
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> SMPTE Minutes</guilabel></term>
<listitem>
<para>
align to whole minutes, adjust to account for any SMPTE start
offset
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Seconds</guilabel></term>
<listitem>
<para>
align to whole seconds
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Minutes</guilabel></term>
<listitem>
<para>
align to whole minutes
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Beats/32</guilabel></term>
<listitem>
<para>
align to 1/32 divisions of the beat
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Beats/16</guilabel></term>
<listitem>
<para>
align to 1/16 divisions of the beat
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Beats/8</guilabel></term>
<listitem>
<para>
align to 1/8 divisions of the beat
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Beats/4</guilabel></term>
<listitem>
<para>
align to 1/4 divisions of the beat
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Beats/3</guilabel></term>
<listitem>
<para>
align to 1/3 divisions of the beat
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Beats</guilabel></term>
<listitem>
<para>
align to beats
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Bars</guilabel></term>
<listitem>
<para>
align to the start of bars
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Marks</guilabel></term>
<listitem>
<para>
align to the nearest mark of some kind
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Edit Cursor</guilabel></term>
<listitem>
<para>
align to the current position of the edit cursor
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Region starts</guilabel></term>
<listitem>
<para>
align to the nearest start of a region in the (first) selected
track
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Region ends</guilabel></term>
<listitem>
<para>
align to the nearest end of a region in the (first) selected
track
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Region syncs</guilabel></term>
<listitem>
<para>
align to the nearest region sync point in the (first) selected
track
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guilabel> Region bounds </guilabel></term>
<listitem>
<para>
align to the nearest region start or end in the (first) selected
track
</para>
</listitem>
</varlistentry>
</variablelist>
<section id="changing-snap-settings">
<title> To change snap settings </title>
<para>
Move the mouse pointer to the toolbar panel of the editor window.
Click on the "expansion arrow" of the "Snap setting" chooser. This
will popup a list of available snap settings. If necessary, scroll
down to see your desired choice. Click on your choice in the list to
dismiss it and make Ardour switch to the new setting.
</para>
<note>
<para>
Changing snap settings has <emphasis>no</emphasis> effect on the
position of any existing region. Its effect is only on objects
being moved.
</para>
</note>
<tip>
<para>
The snap setting also affects moving the playhead, the edit
cursor, loop/punch and location markers, and dragging/moving range
selections.
</para>
</tip>
</section>
<section id="snap-mode">
<title> Snap Mode </title>
<para>
There are two subtly different ways in which the snap setting can
affect region motion:
</para>
<variablelist>
<title></title>
<varlistentry>
<term>normal snap mode</term>
<listitem>
<para>
regions can only be moved to positions defined by the snap
setting. It is not possible to move them to intermediate
positions.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>magnetic snap mode</term>
<listitem>
<para>
regions can still be moved to positions not defined by the
setting, but they "stick" to the timepoints that are when
dragged across them. Imagine that the timepoints and the
regions are magnetic - or just try it and see.
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
However, you can press the <emphasis>snap modifier</emphasis> key
while dragging, and the snap setting will be ignored. By default,
this is the key on your keyboard that generates
<emphasis>Mod3</emphasis> , but you can modify this from the
<emphasis>Options Editor</emphasis> keyboard tab.
</para>
</section>
<section id="changing-snap-mode">
<title> To change snap mode </title>
<para>
Move the mouse pointer to the toolbar panel of the editor window.
Click on the "expansion arrow" of the "Snap mode" chooser. This will
popup a list of available snap settings. If necessary, scroll down
to see your desired choice. Click on your choice in the list to
dismiss it and make Ardour switch to the new setting.
</para>
</section>
</section>
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