Minimal commit for Paul.

[ardour-manual-diverged] / _manual / 22_synchronization / 04_overview-of-timecode-related-settings.html

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----
-layout: default
-title: Overview of all Timecode related settings
-menu_title: Overview of Timecode settings
----
-
-<p>
-  Timecode settings are accessed from the menu in three places:
-</p>
-
-<ul>
-  <li><kbd class="menu">Session &gt; Properties &gt; Timecode</kbd></li>
-  <li><kbd class="menu">Edit &gt; Preferences &gt; Transport</kbd></li>
-  <li><kbd class="menu">Edit &gt; Preferences &gt; MIDI</kbd></li>
-</ul>
-
-<h2>Timecode Settings</h2>
-<dl>
-  <dt><kbd class="menu">Timecode frames-per-second</kbd></dt>
-  <dd>
-    Configure timecode frames-per-second (23.976, 24, 24.975, 25, 29.97, 
-    29.97 drop, 30, 30 drop, 59.94, 60). Note that all fractional 
-    framerates are actually fps*(1000.0/1001.0).
-  </dd>
-  <dt><kbd class="menu">Pull up/down</kbd></dt>
-  <dd>
-    Video pull-up modes change the effective samplerate of Ardour to 
-    allow for changing a film soundtrack from one frame rate to another. 
-    See <a href="http://en.wikipedia.org/wiki/Telecine">Telecine</a>
-  </dd>
-  <dt><kbd class="menu">Slave Timecode offset</kbd></dt>
-  <dd>
-    The specified offset is added to the received timecode (MTC or
-    LTC).
-  </dd>
-  <dt><kbd class="menu">Timecode Generator offset</kbd></dt>
-  <dd>
-    Specify an offset which is added to the generated timecode (so far only LTC).
-  </dd>
-  <dt><kbd class="option">JACK Time Master</kbd></dt>
-  <dd>
-    Provide Bar|Beat|Tick and other information to JACK.
-  </dd>
-</dl>
-<p>These settings are session specific.</p>
-
-
-<h2>Transport Preferences</h2>
-<dl>
-  <dt><kbd class="menu">External timecode source</kbd></dt>
-  <dd>
-    Select timecode source: JACK, LTC, MTC, MIDI Clock
-  </dd>
-  <dt><kbd class="option">Match session video frame rate to external timecode</kbd></dt>
-  <dd>
-    This option controls the value of the video frame rate <em>while 
-    chasing</em> an external timecode source. When enabled, the 
-    session video frame rate will be changed to match that of the selected 
-    external timecode source. When disabled, the session video frame rate 
-    will not be changed to match that of the selected external timecode 
-    source. Instead the frame rate indication in the main clock will flash 
-    red and Ardour will convert between the external timecode standard and 
-    the session standard.
-  </dd>
-  <dt><kbd class="option">External timecode is sync locked</kbd></dt>
-  <dd>
-    Indicates that the selected external timecode source shares sync (Black 
-    &amp; Burst, Wordclock, etc) with the audio interface.
-  </dd>
-  <dt><kbd class="option">Lock to 29.9700 fps instead of 30000/1001</kbd></dt>
-  <dd>
-    The external timecode source is assumed to use 29.97 fps instead of 
-    30000/1001. SMPTE 12M-1999 specifies 29.97df as 30000/1001. The spec 
-    further mentions that drop-frame timecode has an accumulated error of -86ms 
-    over a 24-hour period. Drop-frame timecode would compensate exactly for a 
-    NTSC color frame rate of 30 * 0.9990 (ie 29.970000). That is not the actual 
-    rate. However, some vendors use that rate &mdash; despite it being against 
-    the specs &mdash; because the variant of using exactly 29.97 fps has zero 
-    timecode drift.
-  </dd>
-  <dt><kbd class="menu">LTC incoming port</kbd></dt>
-  <dd>
-    Offers a session agnostic way to retain the LTC port connection.
-  </dd>
-  <dt><kbd class="option">Enable LTC generator</kbd></dt>
-  <dd>Does just what it says.</dd>
-  <dt><kbd class="option">Send LTC while stopped</kbd></dt>
-  <dd>
-    Enable to continue to send LTC information even when the transport 
-    (playhead) is not moving. This mode is intended to drive analog tape 
-    machines which unspool the tape if no LTC timecode is received.
-  </dd>
-  <dt><kbd class="menu">LTC generator level</kbd></dt>
-  <dd>
-    Specify the Peak Volume of the generated LTC signal in dbFS. A good value 
-    is 0&nbsp;dBu (which is -18&nbsp;dbFS in an EBU calibrated system).
-  </dd>
-</dl>
-<p>These settings are common to all sessions.</p>
-
-
-<h2>MIDI Preferences</h2>
-<dl>
-  <dt><kbd class="option">Send MIDI Timecode</kbd></dt><dd>Enable MTC generator</dd>
-  <dt><kbd class="option">Send MIDI Clock</kbd></dt><dd>Enable MIDI Clock generator</dd>
-</dl>
-<p>These settings are also common to all sessions.</p>
-