It is very useful to be able to tag different locations in a session for later use when editing and mixing. Ardour supports both locations, which define specific positions in time, and ranges which define a start and end position in time.

In addition to the standard location markers, there are three kinds of special markers:

• CD markers are locations that are restricted to legal CD sector boundaries. They can be used to add track index markers to compact disc images.
• The Loop range defines the start end end points for Looping.
• The punch range defines the in and out points for punch recording.