+++ /dev/null
----
-layout: default
-title: Corresponding Regions Selection
----
-
-<p>
- <a href="/working-with-tracks/track-and-bus-groups/">Track Groups</a> have
- a property titled <kbd class="option">Select</kbd> which, if enabled, cause
- Ardour to propagate a region selection in one track of a group to the
- <dfn>corresponding regions</dfn> of the other tracks in that group.
- </p>
-<p>
- For example, let's assume you have used multiple microphones to record a
- drum kit to multiple tracks. You have created a track group, added all the
- drum tracks, enabled the group and enabled the Select property for the group.
- When you select a region in one of the drum tracks, Ardour will select the
- corresponding region in every other drum track in the group, which in turn
- means that a subsequent edit operation will affect all the grouped drum
- tracks together.
-</p>
-
-<h2>How Ardour Decides Which Regions are "Corresponding"</h2>
-<p>
- Regions in different tracks are considered to be corresponding for the purposes
- of sharing <dfn>selection</dfn> if they satisfy <em>all</em> the following criteria:
-</p>
-<ol>
- <li>Each region starts at the <dfn>same offset</dfn> within its source file,</li>
- <li>each region is located at the <dfn>same position</dfn> on the timeline, and</li>
- <li>each region has the <dfn>same length</dfn>.</li>
-</ol>
-
-<h2>Overlap Correspondence</h2>
-<p>
- Sometimes, the rules outlined above are too strict to get Ardour to do what you
- want. Regions may have been trimmed to slightly different lengths, or positioned
- slightly differently, and this will cause Ardour to not select regions in other
- grouped tracks.</p>
-<p>
- In this case, change
- <kbd class="menu">Edit > Preferences > Editor > Regions in
- active edit groups are edited together:</kbd> to <kbd
- class="menu">whenever they overlap in time</kbd>. With this option enabled, r
- egions in different tracks will be considered equivalent for the purposes of selection if they
- <dfn>overlap</dfn>. This is much more flexible and will cover almost all of the
- cases that the fixed rules above might make cumbersome.
-</p>
-