<p>Tempo and meter 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 you change tempo or move an audio-locked meter, all objects on the timeline that are glued to bars and beats (locations, regions) will move in sympathy.</p>
+ When you change tempo or move an audio-locked meter, 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 advised that you show the BBT ruler (available by right-clicking an existing marker or ruler name),
+ and ensure that the constraint modifier is set (in Preferences->User Interaction) so that no other modifiers share its key combination.<br>
+ The constraint modifier is the "Constrain drags using : " setting under the "When Beginning a Drag" heading. One viable setting is control-shift.
+</p>
<h3>Tempo</h3>
<p>Tempo can be adjusted in several ways:
<br>
<p>A tempo may be remped or constant.
-<ul><li>A constant tempo will keep the sesion tempo constant until the next tempo section, at which time it will jump instantly to the next tempo.
-These are mostly useful abrupt changes, and is the way in which traditional DAWs deal with tempo changes (abrupt jumps in tempo).</li>
+ <ul>
+ <li>A constant tempo will keep the sesion tempo constant until the next tempo section, at which time it will jump instantly to the next tempo.
+ These are mostly useful abrupt changes, and is the way in which traditional DAWs deal with tempo changes (abrupt jumps in tempo).
+ <br>
+ </li>
-<li>A ramped tempo increases its tempo over time so that when the next tempo section has arrived, the sesion tempo is the same as the second one.
-This is useful for matching the session tempo to music which has been recorded without click tracks or electronic clocks.
+ <li>A ramped tempo increases its tempo over time so that when the next tempo section has arrived, the sesion tempo is the same as the second one.
+This is useful for matching the session tempo to music which has been recorded without a metronome.
Ramps may also be used as a compositional tool, but more on this later.
Note that a ramp requires two points - a start and an end tempo. The first tempo in a new session is ramped, but appears to be constant as it has no tempo to ramp to. It is only when you add a new tempo and adjust one of them that you will hear a ramp.
-The same applies to the last tempo in the session - it will always appear to be constant until a new last tempo is added and changed.
-</li>
-</ul>
+ The same applies to the last tempo in the session - it will always appear to be constant until a new last tempo is added and changed.
+ </li>
+ </ul>
+</p>
+<br>
+<p>
+ <img src="/images/constant-tempo.png" alt="A constant tempo displaying the tempo at the playhead in the audio clock">
+ <br>
+ A series of constant tempo markers. The tempo at the playhead position is the same as the previous tempo.
+</p>
+<br>
+<p>
+ <img src="/images/ramped-tempo.png" alt="A ramped tempo displaying the tempo at the playhead in the audio clock">
+ <br>
+ 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.
</p>
<br>
<p>To add a new tempo, use the primary modifier and click on the tempo line at the desired position.
<p>To copy a tempo, hold down the primary modifier and drag the tempo you wish to copy.</p>
<h3>Meter</h3>
-<br>
<p>Meter 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).
<br>
<li>To copy a meter, hold down control and drag it.</li>
-<br>
<h3>Techniques </h3>
-<br>
<p>As a general approach, the best way to control tempo ramps is to use them in pairs.
</p>
<p>Lets imagine we want to match the click to a drum performance recorded in 'free time'.<br>
<p>In a general sense, adding tempo markers in pairs allows you to 'pin' your previous work while you move further to the right.
</p>
-<br>
-Another use case : matching accelerando.
-<br>
+<h3>Another use case : matching accelerando</h3>
<p>Imagine you have some video and have located where your music cue begins. Move the first meter to that frame
(you may snap to TC frames, but not music with an audio locked meter).
</p>
</p>
<p>If your ramp doesn't feel correct, you may add more points within it and keep adjusting beat positions in a similar manner.
</p>
-<br>
<h3>General</h3>
<p>Audio locked meters can be useful when composing, as they allow a continuous piece of music to be worked on in
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