120 lines
5.5 KiB
HTML
120 lines
5.5 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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You can change the clock mode 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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<dl>
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<dt>Timecode</dt><dd>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).</dd>
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<dt>BBT</dt><dd>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.</dd>
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<dt>Minutes:Seconds</dt><dd>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).</dd>
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<dt>Samples</dt><dd>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.</dd>
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</dl>
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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. Enter time in the same order as the
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current clock mode—if the clock is in Timecode mode, you need to enter
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hours, minutes, seconds, frames. So, to change to a time of 12:15:20:15 you
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would type <kbd class="input">1 2 1 5 2 0 1 5</kbd>. Each number you type will
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appear in a different color, from right to left, overwriting the existing value.
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Mid-edit, after typing <kbd class="input">3 2 2 2</kbd> the clock might look like this:
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</p>
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<img src="/images/clockedit.png" alt="An image of a clock being edited in Ardour">
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<p>
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To finish the edit, press <kbd>↵</kbd> or <kbd>Tab</kbd>. To exit an
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edit without changing the clock press <kbd>ESC</kbd>. If you mis-type an entry
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so that the new value would be illegal (for example, resulting in more than 30
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frames when Timecode is set to 30 frames per second), the clock will reset at
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the end of the edit, and move the cursor back to the start so that you can
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start over.
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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 for those who wish to be able 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. Suppose that the clock is in BBT
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mode, displaying <samp>024|03|0029</samp>, and you want to alter the value to
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the first beat of the current bar. Click on the clock and type
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<kbd class="input">0 1 0 0 0 0</kbd>. Similarly, if it is in Minutes:Seconds
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mode, displaying <samp>02:03:04.456</samp>, and you want to get to exactly 2
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hours, click on the clock and type <kbd class="input">0 0 0 0 0 0 0</kbd> to
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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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You can also type values into the clock that are intended as a relative change,
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rather than a new absolute value. Simply end 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>, you move it back 2000 samples by typing
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<kbd class="input">2 0 0 0</kbd> and <kbd>-</kbd>, rather than ending with
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Enter or Tab.
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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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Position the mouse pointer over the clock, and move the scroll wheel. Moving
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the scroll wheel up (<kbd class="mouse">⇑</kbd>) increases the value
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shown on the clock, moving it down (<kbd class="mouse">⇑</kbd>)
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decreases it. The step size is equal to the unit of the field
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you are hovering 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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Position the mouse pointer over the clock, press the left mouse button and drag.
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Dragging upwards increases the value shown on the clock, dragging downwards
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decreases it, again with a step size equal to the unit of the field you
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began the drag on.
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</p>
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