3 <img src="/images/new_main_clocks.png" alt="The transport clocks in Ardour">
5 The transport clocks in Ardour
10 <dfn>Clocks</dfn> in Ardour are used to display <dfn>time values</dfn> precisely.
11 In many cases, they are also one way to edit (change) time values, and in a few
12 cases, the only way. All clocks share the same basic appearance and functionality,
13 which is described below, but a few clocks serve particularly important roles.
16 In the transport bar of the editor window there are two clocks (on a large enough
17 screen), that display the current position of the playhead
18 and additional information related to transport control and the timeline. These
19 are called the <dfn>transport clocks</dfn>; the left one is the primary
20 transport clock and the right one is the secondary transport clock.
23 All the clocks in Ardour share the same powerful way of editing time. Refer to
24 <a href="@@editing-clocks">Editing Clocks</a> to learn how.
27 Editing the time in the transport clocks will reposition the playhead in the same
28 way that various other editing operations will.
31 <h2>The Special Role of the Secondary Transport Clock</h2>
34 On a few occasions Ardour needs to display time values to the user, but there
35 is no obvious way to specify what units to use. The most common case is the big
36 cursor that appears when dragging regions. For this and other similar cases,
37 Ardour will display time using the same units as the secondary clock.
40 <h2>Why are there two transport clocks?</h2>
43 Having two transport clocks allows seeing the playhead position in two different
44 time units without having to change any settings. For example, one can see the
45 playhead position in both timecode units and BBT time.
48 <h2>Special Modes for the Transport Clocks</h2>
51 In addition to the time-unit modes, each of the two transport
52 clocks (again, on a sufficiently large screen) can be
53 independently set to display <dfn>Delta to Edit Point</dfn> in whatever time
54 units its current mode indicates. This setting means that the clock shows the
55 distance between the playhead and the current edit point, and it may show a
56 positive or negative value depending on the temporal order of these two points.
57 The clocks will use a different color when in this mode to avoid confusion.
61 To switch either (or both!) of the transport clocks into this mode, use
62 <kbd class="menu"> Edit > Preferences > Transport</kbd> and select
63 the relevant checkboxes.
67 Note that when in <samp>Delta to Edit Point</samp> mode, the transport clocks
72 <h2>The Big Clock</h2>
75 To show the current playhead position in a big, resizable window, activate
76 <kbd class="menu">Window > Big Clock</kbd>. The big clock is very useful
77 when working away from the screen but still wanting to see the playhead
78 position clearly (such as when working with a remote control device across
79 a room). The big clock will change its visual appearance to indicate when active
80 recording is taking place. Below on the left is a screenshot showing a fairly
81 large big clock window filling a good part of the display, and on the right,
82 the same clock during active recording.
86 <a href="/images/bigclock.png"><img src="/images/bigclock.png" height="100" alt="The big clock filling a screen"></a>
87 <a href="/images/bigclock-recording.png"><img src="/images/bigclock-recording.png" height="100" alt="The big clock while recording"></a>
89 The Big Clock, with no transport rolling (left) and recording (right).