manual/include/working-with-markers.html

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<p>
It is very useful to be able to tag different locations in a session for
later use when editing and mixing. Ardour supports both
<dfn>locations</dfn>, which define specific positions in time,
and <dfn>ranges</dfn> which define a start and end position in time.
</p>
<p>
In addition to the standard location markers, there are several more kinds of
special markers:
</p>
<ul>
<li>
<dfn>BBT markers</dfn> make it possible to restart the count of bars and
beats multiple times in a session.
</li>
<li>
<dfn>Time signature markers</dfn> allow changing the time signature from
e.g. 4/4 to 6/8 and then to 3/4 within the same composition.
</li>
<li>
<dfn>Tempo markers</dfn> allow changing tempo within the same composition
either abruptly or gradually.
</li>
<li>
<dfn>Range markers</dfn> helps preserving selections (ranges) by storing
them in the project and giving them telling names.
</li>
<li>
The <dfn>loop range</dfn> defines the start and end points for Looping.
</li>
<li>
The <dfn>punch range</dfn> defines the in and out points for punch
recording.
</li>
<li>
<dfn>CD markers</dfn> are locations that are restricted to legal
<dfn>CD sector boundaries</dfn>. They can be used to add track index
markers to compact disc images.
</li>
<li>
<dfn>Cue markers</dfn> allow integrating elements of non-linear grid-based
workflow into the linear timeline-based workflow by launching and stopping
user-defined cues at particular points in time.
</li>
</ul>