130 lines
5.9 KiB
HTML
130 lines
5.9 KiB
HTML
<h2>Clock Modes</h2>
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<p>
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Every clock in Ardour has four different, selectable <dfn>clock
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modes</dfn>. Each mode displays time using different units.
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The clock mode can be changed by <kbd class="mouse">Right</kbd>-clicking
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on the clock and selecting the desired mode from the menu. Some clocks are
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entirely independent of any other clock's mode; others are linked so that
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changing one changes all clocks in that group. The different modes are:
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</p>
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<table class="dl">
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<tr><th>Timecode</th><td>Time is shown as <dfn><abbr title="Society of Motion Picture and Television
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Engineers">SMPTE</abbr> timecode</dfn> in Hours:Minutes:Seconds:Frames,
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measured from the timecode zero point on the timeline (which may not
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correspond to the session start and/or absolute zero on the timeline,
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depending on configurable timecode offsets).
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The frames value is dictated by either the session <abbr title="Frames Per
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Second">FPS</abbr> setting, or, if slaved to an external timecode master,
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the master's setting. In the transport clocks, the FPS value is shown below
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the time display, along with an indication of the current timecode source
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(<samp>INT</samp> means that Ardour is its own timecode source).</td></tr>
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<tr><th>BBT</th><td>Time is shown as Bars:Beats:Ticks, indicating <dfn>musical time</dfn> measured
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from the start of the session. The transport clocks show the current tempo
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in <abbr title="Beats Per Minute">bpm</abbr> and meter below the time
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display.</td></tr>
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<tr><th>Minutes:Seconds</th><td>Time is shown as Hours:Minutes:Seconds.Milliseconds, measured from the
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absolute start of the timeline (ignoring the session start and any timecode
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offsets).</td></tr>
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<tr><th>Samples</th><td>Time is shown as a <dfn>sample count</dfn> from the absolute start of the timeline
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(ignoring the session start and any timecode offsets). The number of
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samples per second is given by the current sample rate, and in the transport
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clocks, this rate is shown below the time display along with any
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pullup/pulldown adjustment.</td></tr>
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</table>
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<h2>Changing clock values with the keyboard</h2>
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<p>
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New values for the clock can be typed in after clicking on the relevant clock.
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Clicking on the clock will show a thin vertical cursor bar just to the right
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of the next character to be overwritten. Time should be typed in the same
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order as the current clock mode—if the clock is in Timecode mode, it
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should be hours, minutes, seconds, frames. So, to change to a time of
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12:15:20:15 one would type
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<kbd>1</kbd><kbd>2</kbd><kbd>1</kbd><kbd>5</kbd><kbd>2</kbd><kbd>0</kbd><kbd>1</kbd><kbd>5</kbd>.
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Each number typed will appear in a different color, from right to left,
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overwriting the existing value. Mid-edit, after typing <kbd>3</kbd><kbd>2</kbd><kbd>2</kbd><kbd>2</kbd> the clock might look like this:
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</p>
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<figure>
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<img src="/images/clockedit.png" alt="A clock being edited in Ardour">
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<figcaption>
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A clock being edited in Ardour
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</figcaption>
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</figure>
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<p>
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Finishing the edit is done by pressing <kbd>↵</kbd> or <kbd>Tab</kbd>.
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The <kbd>ESC</kbd> key allows to exit an edit without changing the clock. If an
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entry is mis-typed so that the new value would be illegal (for example,
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resulting in more than 30 frames when Timecode is set to 30 frames per second),
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the clock will reset at the end of the edit, and move the cursor back to the
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start to allow for another try.
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</p>
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<h2>Avoiding the mouse entirely</h2>
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<p>
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There is a shortcut available to edit the transport
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clocks entirely without the mouse. It can be found in
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<kbd class="menu">Window > Key Bindings > Transport > Focus On
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Clock</kbd>. If bound to a key (<kbd>÷</kbd> on the numerical
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keypad is the
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default), then pressing that key is equivalent to clicking on the primary (left)
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transport clock, and editing can begin immediately.
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</p>
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<h2>Entering Partial Times</h2>
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<p>
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One detail of the editing design that is not immediately obvious is that it is
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possible to enter part of a full time value.
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</p>
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<p>
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As an exemple, supposing that the clock is in BBT mode, displaying
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<samp>024|03|0029</samp>, altering the value to the first beat of the current
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bar can be done by clicking on the clock and typing
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<kbd>0</kbd><kbd>1</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd>.
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Similarly, if it is in Minutes:Seconds mode, displaying
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<samp>02:03:04.456</samp>, getting to exactly 2 hours can be achieved by
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clicking on the clock and typing
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<kbd>0</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd>
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to reset the minutes, seconds and milliseconds fields.
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</p>
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<h2>Entering Delta Times</h2>
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<p>
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Values can also be typed into the clock that are intended as a relative change,
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rather than a new absolute value, by ending the edit by pressing
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<kbd>+</kbd> or <kbd>-</kbd> (the ones on any keypad will also work). The plus
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key will add the entered value to the current value of the clock, minus will
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subtract it. For example, if the clock is in Samples mode and displays
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<samp>2917839</samp>, moving it back 2000 samples is done by typing
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<kbd>2</kbd><kbd>0</kbd><kbd>0</kbd><kbd>0</kbd> and <kbd>-</kbd>, rather than
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ending with <kbd>Enter</kbd> or <kbd>Tab</kbd>.
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</p>
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<h2>Changing clock values with the mouse</h2>
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<h3>Using a scroll wheel</h3>
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<p>
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With the mouse pointer over the clock, moving the scroll wheel changes the
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clock values. Moving the scroll wheel up (<kbd class="mouse">⇑</kbd>)
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increases the value shown on the clock, moving it down (<kbd
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class="mouse">⇓</kbd>) decreases it. The step size is equal to the unit
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of the field hovered over (seconds, hours, etc.).
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</p>
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<h3>Dragging the mouse</h3>
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<p>
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With the mouse pointer over the clock, pressing the left mouse button and
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dragging also affects the clocks : dragging upwards increases the value shown
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on the clock, dragging downwards decreases it, again with a step size equal to
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the unit of the field where the drag began on.
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</p>
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