3 title: Overview of all Timecode related settings
4 menu_title: Overview of Timecode settings
8 Timecode settings are accessed from the menu in three places:
12 <li><kbd class="menu">Session > Properties > Timecode</kbd></li>
13 <li><kbd class="menu">Edit > Preferences > Transport</kbd></li>
14 <li><kbd class="menu">Edit > Preferences > MIDI</kbd></li>
17 <h2>Timecode Settings</h2>
19 <dt><kbd class="menu">Timecode frames-per-second</kbd></dt>
21 Configure timecode frames-per-second (23.976, 24, 24.975, 25, 29.97,
22 29.97 drop, 30, 30 drop, 59.94, 60). Note that all fractional
23 framerates are actually fps*(1000.0/1001.0).
25 <dt><kbd class="menu">Pull up/down</kbd></dt>
27 Video pull-up modes change the effective samplerate of Ardour to
28 allow for changing a film soundtrack from one frame rate to another.
29 See <a href="http://en.wikipedia.org/wiki/Telecine">Telecine</a>
31 <dt><kbd class="menu">Slave Timecode offset</kbd></dt>
33 The specified offset is added to the received timecode (MTC or
36 <dt><kbd class="menu">Timecode Generator offset</kbd></dt>
38 Specify an offset which is added to the generated timecode (so far only LTC).
40 <dt><kbd class="option">JACK Time Master</kbd></dt>
42 Provide Bar|Beat|Tick and other information to JACK.
45 <p>These settings are session specific.</p>
48 <h2>Transport Preferences</h2>
50 <dt><kbd class="menu">External timecode source</kbd></dt>
52 Select timecode source: JACK, LTC, MTC, MIDI Clock
54 <dt><kbd class="option">Match session video frame rate to external timecode</kbd></dt>
56 This option controls the value of the video frame rate <em>while
57 chasing</em> an external timecode source. When enabled, the
58 session video frame rate will be changed to match that of the selected
59 external timecode source. When disabled, the session video frame rate
60 will not be changed to match that of the selected external timecode
61 source. Instead the frame rate indication in the main clock will flash
62 red and Ardour will convert between the external timecode standard and
65 <dt><kbd class="option">External timecode is sync locked</kbd></dt>
67 Indicates that the selected external timecode source shares sync (Black
68 & Burst, Wordclock, etc) with the audio interface.
70 <dt><kbd class="option">Lock to 29.9700 fps instead of 30000/1001</kbd></dt>
72 The external timecode source is assumed to use 29.97 fps instead of
73 30000/1001. SMPTE 12M-1999 specifies 29.97df as 30000/1001. The spec
74 further mentions that drop-frame timecode has an accumulated error of -86ms
75 over a 24-hour period. Drop-frame timecode would compensate exactly for a
76 NTSC color frame rate of 30 * 0.9990 (ie 29.970000). That is not the actual
77 rate. However, some vendors use that rate — despite it being against
78 the specs — because the variant of using exactly 29.97 fps has zero
81 <dt><kbd class="menu">LTC incoming port</kbd></dt>
83 Offers a session agnostic way to retain the LTC port connection.
85 <dt><kbd class="option">Enable LTC generator</kbd></dt>
86 <dd>Does just what it says.</dd>
87 <dt><kbd class="option">Send LTC while stopped</kbd></dt>
89 Enable to continue to send LTC information even when the transport
90 (playhead) is not moving. This mode is intended to drive analog tape
91 machines which unspool the tape if no LTC timecode is received.
93 <dt><kbd class="menu">LTC generator level</kbd></dt>
95 Specify the Peak Volume of the generated LTC signal in dbFS. A good value
96 is 0 dBu (which is -18 dbFS in an EBU calibrated system).
99 <p>These settings are common to all sessions.</p>
102 <h2>MIDI Preferences</h2>
104 <dt><kbd class="option">Send MIDI Timecode</kbd></dt><dd>Enable MTC generator</dd>
105 <dt><kbd class="option">Send MIDI Clock</kbd></dt><dd>Enable MIDI Clock generator</dd>
107 <p>These settings are also common to all sessions.</p>