Meter > Time Signature

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Alexandre Prokoudine 2022-09-24 02:37:28 +03:00 committed by Paul Davis
parent 1073a8de9a
commit 9b274008fa
6 changed files with 171 additions and 114 deletions

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@ -35,9 +35,9 @@
The <em>Grid</em> helps visually placing items in time. It will draw
lines at selected intervals as chosen in the drop-down selector.
Musical grid settings (<em>Bar</em> to <em>Sextuplets</em>) obviously
depend on the <a href="@@tempo-and-meter">tempo and meter</a>, so
changing the tempo or meter will rescale the grid, while absolute grid
settings (<em>Timecode</em>, etc&hellip;) won't be affected.
depend on the <a href="@@tempo-and-meter">tempo and time signature</a>, so
changing the tempo or time signature will rescale the grid, while absolute
grid settings (<em>Timecode</em>, etc&hellip;) won't be affected.
</p>
<p class="note">

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@ -23,23 +23,69 @@
</p>
<table class="dl">
<tr><th><dfn>Mins:Secs</dfn></th><td>scaling the session with the Mins:Secs:mSec notation</td></tr>
<tr><th><dfn>Timecode</dfn></th><td>scaling the session with the Hours:Mins:Secs:Frames notation</td></tr>
<tr><th><dfn>Samples</dfn></th><td>scaling the session with the sample number notation</td></tr>
<tr><th><dfn>Bars:Beats</dfn></th><td>slicing the time according to the time signature of the Meter</td></tr>
<tr><th><dfn>Meter</dfb></th><td>shows the time signature. It can be changed along the timeline, by <kbd class="mouse">Right click</kbd> &gt; <kbd class="menu">New Meter</kbd>. The Bars:Beats ruler will reflect the change.</td></tr>
<tr><th><dfn>Tempo</dfn></th><td>shows the BPM. It can be changed along the timeline, by <kbd class="mouse">Right click</kbd> &gt; <kbd class="menu">New Tempo</kbd>. The Bars:Beats ruler will reflect the change.</td></tr>
<tr><th><dfn>Range Markers</dfn></th><td>allow to create and modify ranges directly on the Ruler.</td></tr>
<tr><th><dfn>Loop/Punch Ranges</dfn></th><td>are special kind of ranges designed to be played as a loop and to do punch recording, i.e. recording on a precise section of time, respectively.</td></tr>
<tr><th><dfn>CD Markers</dfn></th><td>are markers designed to be used while creating a recording that has to be split in time, as an audio CD</td></tr>
<tr><th><dfn>Location Markers</dfn></th><td>is meant to receive any kind of marker, user generated or from Ardour itself.</td></tr>
<tr><th><dfn>Video Timeline</dfn></th><td>shows thumbnails of the <a href="@@video-timeline-and-monitoring">video</a> in the timeline</td></tr>
<tr>
<th><dfn>Mins:Secs</dfn></th>
<td>scaling the session with the Mins:Secs:mSec notation</td>
</tr>
<tr>
<th><dfn>Timecode</dfn></th>
<td>scaling the session with the Hours:Mins:Secs:Frames notation</td>
</tr>
<tr>
<th><dfn>Samples</dfn></th>
<td>scaling the session with the sample number notation</td>
</tr>
<tr>
<th><dfn>Bars:Beats</dfn></th>
<td>slicing the time according to the time signature</td>
</tr>
<tr>
<th><dfn>Time Signature</dfb></th>
<td>shows the time signature. It can be changed along the timeline, by
<kbd class="mouse">Right-click</kbd> &gt;
<kbd class="menu">New Time Signature</kbd>. The Bars:Beats ruler will
reflect the change.</td>
</tr>
<tr>
<th><dfn>Tempo</dfn></th>
<td>shows the BPM. It can be changed along the timeline, by
<kbd class="mouse">Right-click</kbd> &gt; <kbd class="menu">New Tempo</kbd>.
The Bars:Beats ruler will reflect the change.</td>
</tr>
<tr>
<th><dfn>Range Markers</dfn></th>
<td>allow to create and modify ranges directly on the Ruler.</td>
</tr>
<tr>
<th><dfn>Loop/Punch Ranges</dfn></th>
<td>are special kind of ranges designed to be played as a loop and to do
punch recording, i.e. recording on a precise section of time, respectively.</td>
</tr>
<tr>
<th><dfn>CD Markers</dfn></th>
<td>are markers designed to be used while creating a recording that has
to be split in time, as an audio CD</td>
</tr>
<tr>
<th><dfn>Location Markers</dfn></th>
<td>is meant to receive any kind of marker, user generated or from Ardour
itself.</td>
</tr>
<tr>
<th><dfn>Cue markers</dfn></th>
<td>allows triggering entire cues from the grid in the <em>Cue</em>window</td>
</tr>
<tr>
<th><dfn>Video Timeline</dfn></th>
<td>shows thumbnails of the <a href="@@video-timeline-and-monitoring">video</a>
in the timeline</td>
</tr>
</table>
<p>
Most of the operations on the markers are described in <a
href="@@working-with-markers">Working with Markers</a>, while the Meter,
href="@@working-with-markers">Working with Markers</a>, while the Time Signature,
Tempo, Bars:Beats and Timecode use are described in <a
href="@@tempo-and-meter">Tempo and Meter</a>.
href="@@tempo-and-meter">Tempo and Time Signature</a>.
</p>

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@ -12,20 +12,21 @@ pairs.
</p>
<p>
One typical use of tempo ramps is to match the click to a drum performance recorded in
'free time', like in the (admittedly bad) 4/4 example on the left.
One typical use of tempo ramps is to match the click to a drum performance
recorded in 'free time', like in the (admittedly bad) 4/4 example on the left.
</p>
<h3 class="clear">Step 1 : First meter</h3>
<h3 class="clear">Step 1: First time signature</h3>
<figure class="left">
<img class="mini" src="/images/tempo-ramp_2.png" alt="Step 1/5">
<figcaption>Placing the first meter</figcaption>
<figcaption>Placing the first time signature</figcaption>
</figure>
<p>
The first thing needed is determining where the first beat is in the recording
and <kbd class="mouse">left</kbd> dragging the first meter to that position.
and <kbd class="mouse">left</kbd> dragging the first time signature to that
position.
</p>
<h3 class="clear">Step 2: Locating the <em>n</em>th bar</h3>
@ -36,9 +37,9 @@ and <kbd class="mouse">left</kbd> dragging the first meter to that position.
</figure>
<p>
Now the first click will be in time with the first beat. By listening to the recorded
drums, the position of bar <em>n</em> (here, 9th beat, 3rd bar) is visually located (the
playhead may be moved to this location to "pin" it).
Now the first click will be in time with the first beat. By listening to the
recorded drums, the position of bar <em>n</em> (here, 9th beat, 3rd bar) is
visually located (the playhead may be moved to this location to "pin" it).
</p>
<h3 class="clear">Step 3: Aligning the ruler with the tempo</h3>
@ -49,17 +50,18 @@ playhead may be moved to this location to "pin" it).
</figure>
<p>
Holding the constraint modifier (<kbd class="mod3n"></kbd> by default,
may be changed in Preferences->Editor->Modifiers), the third
bar marker in the BBT ruler is dragged at the position of the third bar in the
recording (where the playhead is located). This drag can be done either in the Meter
or in the Tempo rulers. The tempo (on the first and only tempo marker) reflects
the new value based on this change.
Holding the constraint modifier (<kbd class="mod3n"></kbd> by default, may be
changed in <kbd class="menu">Preferences &gt; Editor &gt; Modifiers</kbd>),
the third bar marker in the BBT ruler is dragged at the position of the third
bar in the recording (where the playhead is located). This drag can be done
either in the Time Signature or in the Tempo rulers. The tempo (on the first
and only tempo marker) reflects the new value based on this change.
</p>
<p>
The click now matches the first 8 beats, but after that it can wander off, which
will be reflected in the tempo lines thet won't quite match the drum hits.
The click now matches the first 8 beats, but after that it can wander off,
which will be reflected in the tempo lines thet won't quite match the drum
hits.
</p>
<h3 class="clear">Step 4: Placing a new tempo marker</h3>
@ -71,8 +73,8 @@ will be reflected in the tempo lines thet won't quite match the drum hits.
<p>
A new tempo marker is placed on the last position where the click matches the
recorded audio, by <kbd class="mod1n"></kbd>-clicking the Tempo ruler. This will
"anchor" the value of the tempo at that position.
recorded audio, by <kbd class="mod1n"></kbd>-clicking the Tempo ruler. This
will "anchor" the value of the tempo at that position.
</p>
<h3 class="clear">Step 5: Placing another tempo marker at the <em>n</em>th beat</h3>
@ -83,8 +85,8 @@ recorded audio, by <kbd class="mod1n"></kbd>-clicking the Tempo ruler. This will
</figure>
<p>
Another tempo marker is placed <em>n</em> beats after the previous marker (here,
4 beats, 1 bar).
Another tempo marker is placed <em>n</em> beats after the previous marker
(here, 4 beats, 1 bar).
</p>
@ -96,8 +98,9 @@ Another tempo marker is placed <em>n</em> beats after the previous marker (here,
</figure>
<p>
Now, <kbd class="mod3n"></kbd>-dragging any beat <strong>after</strong> the second
new tempo marker will allow to align the drum audio and tempo after the second marker.
Now, <kbd class="mod3n"></kbd>-dragging any beat <strong>after</strong> the
second new tempo marker will allow to align the drum audio and tempo after the
second marker.
</p>
<h3 class="clear">Step 7: Ramping the tempo change</h3>
@ -108,41 +111,42 @@ new tempo marker will allow to align the drum audio and tempo after the second m
</figure>
<p>
Although it may be unnecessary in some cases where the tempo changes abruptly, most
of the time, the tempo change is progressive in time, like an instrumentist drifting in tempo.
In those cases, the tempo change should be progressive too, and Ardour allows that
by ramping the tempo change.
Although it may be unnecessary in some cases where the tempo changes abruptly,
most of the time, the tempo change is progressive in time, like an
instrumentist drifting in tempo. In those cases, the tempo change should be
progressive too, and Ardour allows that by ramping the tempo change.
</p>
<p>
<kbd class="mouse">right</kbd> clicking the first tempo marker, a menu appears,
<kbd class="mouse">Right</kbd>-clicking the first tempo marker, a menu appears,
allowing to <kbd class="menu">Ramp to Next</kbd>. This will make the tempo
between the two markers linearly change from the first marker's value to the
second's.
</p>
<p>
Again, some time later the click will probably drift again, so the same technique
has to be repeated: adding two new tempos and dragging the BBT ruler
Again, some time later the click will probably drift again, so the same
technique has to be repeated: adding two new tempos and dragging the BBT ruler
<strong>after</strong> the newest tempo so that the beats align with the audio
again.
</p>
<p>
In a general sense, adding tempo markers in pairs allows to 'pin' the tempo at the
marker's location while moving further to the right.
In a general sense, adding tempo markers in pairs allows to 'pin' the tempo at
the marker's location while moving further to the right.
</p>
<h2>Other use cases</h2>
<p>
Audio locked meters can be useful when composing, as they allow a continuous
piece of music to be worked on in isolated segments, preventing the listening
fatigue of a fixed form. Reassembly is left as an excercise for the reader.
Audio-locked time signatures can be useful when composing, as they allow a
continuous piece of music to be worked on in isolated segments, preventing the
listening fatigue of a fixed form. Reassembly is left as an excercise for the
reader.
</p>
<p>
Tempo ramps can also be used in a video context, e.g. for an accelerando,
by snapping to TC frames and dragging the ruler so that a bar ends up on a significant
video frame.
Tempo ramps can also be used in a video context, e.g. for an accelerando, by
snapping to TC frames and dragging the ruler so that a bar ends up on a
significant video frame.
</p>

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@ -1,24 +1,24 @@
<p>
Tempo and meter belong together. Without both, there is no way to know where
a beat lies in time.
Tempo and time signature belong together. Without both, there is no way to
know where a beat lies in time.
</p>
<p>
Tempo provides a musical pulse, which is divided into beats and bars by a
meter. When tempo is changed or an audio-locked meter is moved, all objects
on the timeline that are glued to bars and beats (locations, regions) will
move in sympathy.
time signature. When tempo is changed or an audio-locked time signature is
moved, all objects on the timeline that are glued to bars and beats
(locations, regions) will move in sympathy.
</p>
<p class="note">
When performing meter or tempo operations, it is advisable to use the BBT
ruler (available by right-clicking an existing marker or ruler name), and
ensure that the constraint modifier is set (<kbd class="mod3n"></kbd> by default,
may be changed in Preferences->Editor->Modifiers)
so that no other modifiers share its key combination. The constraint modifier
is the "Constrain drags using: " setting under the "When Beginning a Drag"
heading. One viable setting is
When performing time signature or tempo operations, it is advisable to use the
BBT ruler (available by right-clicking an existing marker or ruler name), and
ensure that the constraint modifier is set (<kbd class="mod3n"></kbd> by
default, may be changed in <kbd class="menu">Preferences &gt; Editor &gt;
Modifiers</kbd>) so that no other modifiers share its key combination. The
constraint modifier is the "Constrain drags using: " setting under the
"When Beginning a Drag" heading. One viable setting is
<kbd class="mod1n"></kbd><kbd class="mod3n"></kbd>.
</p>
@ -29,11 +29,11 @@
</p>
<ul>
<li>by double clicking on a tempo marker. This opens the tempo dialog which
<li>By double clicking on a tempo marker. This opens the tempo dialog which
allows entering the tempo directly into an entry box.</li>
<li>by using the constraint modifier (<kbd class="mod3n"></kbd> by default,
may be changed in Preferences->Editor->Modifiers)
to drag the beat/bars in the BBT ruler or the tempo/meter lines.
<li>By using the constraint modifier (<kbd class="mod3n"></kbd> by default,
may be changed in <kbd class="menu">Preferences &gt; Editor &gt; Modifiers</kbd>)
to drag the beat/bars in the BBT ruler or the tempo/time signature lines.
This is the preferred way to match the tempo to previously recorded
material.</li>
@ -42,7 +42,7 @@
that non-musical snap is in effect if enabled. Snapping to a minute while
dragging a beat may result in some very slow tempos. Snapping a beat to a
video frame however is an incredibly useful way to ensure a soundtrack is
punchy and synchronised to the sample.
punchy and synchronized to the sample.
</p>
<li>by holding down the constraint modifier while dragging a tempo vertically.
@ -55,15 +55,15 @@
A tempo may be locked to audio or musical time. This can be changed by <kbd
class="mouse">right</kbd>-clicking on a tempo. If a tempo is locked to music,
an entry will be available to lock it to audio. Similarly an audio-locked
tempo may be locked to music by <kdb class="mouse">right</kbd>-clicking it
tempo may be locked to music by <kbd class="mouse">right</kbd>-clicking it
and selecting the "Lock to Music" entry.
</p>
<p>
Audio locked tempo marks stay in their frame position as their neighbour's
Audio locked tempo marks stay in their frame position as their neighbor's
positions are altered. Their pulse (musical) position will change as their
neighbours move. Music locked tempo marks move their frame position as their
neighbours are moved, but keep their pulse position (they will move as the
neighbors move. Music locked tempo marks move their frame position as their
neighbors are moved, but keep their pulse position (they will move as the
music is moved).
</p>
@ -89,16 +89,21 @@
</ul>
<figure>
<img src="/images/constant-tempo.png" alt="A constant tempo displaying the tempo at the playhead in the audio clock">
<img src="/images/constant-tempo.png" alt="A constant tempo displaying the
tempo at the playhead in the audio clock">
<figcaption>
A series of constant tempo markers. The tempo at the playhead position is the same as the previous tempo.
A series of constant tempo markers. The tempo at the playhead position is
the same as the previous tempo.
</figcaption>
</figure>
<figure>
<img src="/images/ramped-tempo.png" alt="A ramped tempo displaying the tempo at the playhead in the audio clock">
<img src="/images/ramped-tempo.png" alt="A ramped tempo displaying the tempo
at the playhead in the audio clock">
<figcaption>
A ramped tempo marker. The tempo at the playhead position is approaching the second tempo. Because the playhead is equidistant (in beats) between the two markers, the tempo at the playhead is the average of the two.
A ramped tempo marker. The tempo at the playhead position is approaching
the second tempo. Because the playhead is equidistant (in beats) between
the two markers, the tempo at the playhead is the average of the two.
</figcaption>
</figure>
@ -113,40 +118,41 @@
copied.
</p>
<h3>Meter</h3>
<h3>Time signature</h3>
<p>
Meter positions beats using the musical pulse of a tempo, and groups them
into bars using its number of divisions per bar.
Time signature positions beats using the musical pulse of a tempo, and groups
them into bars using its number of divisions per bar.
</p>
<p>
The first meter in a new session may be moved freely. It has an associated
tempo which cannot be dragged by itself (although all others can). It can be
moved freely and is locked to audio.
The first time signature in a new session may be moved freely. It has an
associated tempo which cannot be dragged by itself (although all others can).
It can be moved freely and is locked to audio.
</p>
<p>
New meters are locked to music. They may only occur on a bar line if music
locked.
New time signatures are locked to music. They may only occur on a bar line if
music locked.
</p>
<p>
An audio locked meter provides a way to cope with musical passages which have
no meter (rubato, pause), or to allow a film composer to insert a break in
music which cannot be counted in beats.
An audio locked time signature provides a way to cope with musical passages
which have no time signature (rubato, pause), or to allow a film composer to
insert a break in music which cannot be counted in beats.
</p>
<p>
If a meter is audio-locked, its bar number is fixed from the point at which
it left the main score. That bar number cannot be changed, nor can tempo
If a time signature is audio-locked, its bar number is fixed from the point at
which it left the main score. That bar number cannot be changed, nor can tempo
motion allow the previous bar to overlap. If another bar is needed, lock the
meter to music again (right click-&gt;"Lock to Music"), drag the meter to the
desired bar and re-lock to audio. The new bar can be freely dragged again.
time signature to music again (<kbd class="mouse">right</kbd> &gt;
<kbd class="menu">Lock to Music</kbd>), drag the time signature to the desired
bar and re-lock to audio. The new bar can be freely dragged again.
</p>
<ul>
<li>To change a meter, double click it. A dialog will appear.</li>
<li>To copy a meter, hold down <kbd class="mod1n"></kbd> and drag it.</li>
<li>To change a time signature, double-click it. A dialog will appear.</li>
<li>To copy a time signature, hold down <kbd class="mod1n"></kbd> and drag it.</li>
</ul>

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@ -29,12 +29,13 @@
<tr><th class="sub1">&square; Timecode</th><td>Same as above, with the time formatted as Hours:Minutes:Seconds:Frames</td></tr>
<tr><th class="sub1">&square; Samples</th><td>Same as the above, with the time displayed in samples from the absolute start</td></tr>
<tr><th class="sub1">&square; Bars &amp; Beats</th><td>Same as the above, with the time formatted as Bars:Beats:Ticks</td></tr>
<tr><th class="sub1">&square; Meter</th><td>Shows / hides the Meter line in the ruler, where the signature can be adjusted along the playline</td></tr>
<tr><th class="sub1">&square; Time Signature</th><td>Shows / hides the time signature line in the ruler, where the signature can be adjusted along the playline</td></tr>
<tr><th class="sub1">&square; Tempo</th><td>Shows / hides the Tempo line, where the BPM can be changed with markers</td></tr>
<tr><th class="sub1">&square; Ranges</th><td>Shows / hides the Range line, where ranges can be defined</td></tr>
<tr><th class="sub1">&square; Loop/Punch</th><td>Shows / hides the Loop/Punch line, where loops and Punches can be defined</td></tr>
<tr><th class="sub1">&square; CD Markers</th><td>Shows / hides the Range line, where CD Markers can be defined</td></tr>
<tr><th class="sub1">&square; Markers</th><td>Shows / hides the Markers line, where custom markers can be defined</td></tr>
<tr><th class="sub1">&square; Cue markers</th><td>Shows / hides the Cue line, where Cue markers can be set to trigger entire cues</td></tr>
<tr><th class="sub1">&square; Video</th><td>Shows / hides the Video timeline, where frames of the video are shown for syncing purposes</td></tr>
<tr><th colspan="2">Zoom</th></tr>
<tr><th class="sub1">Zoom In</th><td>Zooms in, focusing the <em>Zoom Focus</em> (see below)</td></tr>

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@ -1632,13 +1632,13 @@ part: part
---
---
title: Time, Tempo and Meter
title: Time, Tempo and Time Signature
link: time-tempo-and-meter
part: chapter
---
---
title: Tempo and Meter
title: Tempo and Time Signature
include: tempo-and-meter.html
link: tempo-and-meter
uri: working-with-tempo-and-meter
@ -1646,7 +1646,7 @@ part: subchapter
---
---
title: Techniques for Working with Tempo and Meter
title: Techniques for Working with Tempo and Time Signature
include: techniques-for-working-with-tempo-and-meter.html
link: techniques-for-working-with-tempo-and-meter
part: subchapter