+ + A series of constant tempo markers. The tempo at the playhead position is the same as the previous tempo. +
Tempo and meter belong together. without both, there is no way to know where a beat lies in time.
+ +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. +
+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.
+ The constraint modifier is the "Constrain drags using : " setting under the "When Beginning a Drag" heading. One viable setting is .
+
Tempo can be adjusted in several ways: + +
+ NOTE - When dragging the BBT ruler, musical snap has no effect, however be warned that non-musical snap is in effect if enabled. + Snapping to a minute while dragging a beat may result in some verly slow tempos. + Snapping a beat to a video frame however is an incredibly useful way to ensure your soundtrack is punchy and synchronised to the sample. +
+A tempo may be locked to audio or musical time. You may change this by right-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 right clicking it an selecting the "Lock to Music" entry. +
+Audio locked tempo marks stay in their frame position as their neigbours 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 music is moved). +
+A tempo may be remped or constant. + +
+
+
+ A series of constant tempo markers. The tempo at the playhead position is the same as the previous tempo.
+
+ 
+
+ 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.
+
To add a new tempo, use the primary modifier and click on the tempo line at the desired position. +The new tempo will be the same as the tempo at the position of the mouse click (it will not change the shape of the ramp). +
+To copy a tempo, hold down the primary modifier and drag the tempo you wish to copy.
+ +Meter positions beats using the musical pulse of a tempo, and groups them into bars using its number of divisions per bar. +
+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. +
+New meters are locked to music. +They may only occur on a bar line if music locked. +
++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. +
+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 motion allow the previous bar to overlap. +If you need another bar, lock the meter to music again (right click->"Lock to Music"), drag the meter to the desired bar and re-lock to audio. + You may now drag your new bar freely again. +
+As a general approach, the best way to control tempo ramps is to use them in pairs. +
+Lets imagine we want to match the click to a drum performance recorded in 'free time'.
+The first thing we need to do is determine where the first beat is. Drag the first meter to that position.
+
Now the first click will be in time with the first beat. To get all the other beats to align, we listen to the drums +and visually locate the position of bar 4. You may wish to place the playhead here. +
+We then locate bar 4 in the bbt ruler and while holding the constraint modifier, drag it to bar 4 in the drum performance. +
+We notice that the click now matches the first 4 bars, but after that it wanders off. +You will see this reflected in the tempo lines.. they won't quite match the drum hits. +We now locate the earliest position where the click doesn't match, and place a new tempo just before this. +Two bars later, place another new tempo. +
+Now while dragging any beat after the second new tempo, watch the drum audio and tempo lines until they align. +
+Notice what is happeneing here: the tempo previous to your mouse pointer is being changed so that the beat you grabbed +aligns with the pointer. +Notice that the tempo lines previous to the changed one also move. This is because the previous tempo is ramping to the tempo you are changing. +Look further to the left. The tempo lines in the first four bars do not move. +
+Again, some time later the click will not align. I didn't say this was easy. +
+ +Repeat the same technique : add two new tempos and drag the BBT ruler after the newest tempo so that the beats align with the audio again. +
+ +In a general sense, adding tempo markers in pairs allows you to 'pin' your previous work while you move further to the right. +
+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). +
++ Find a starting tempo by listening to the click while you drag the meter's tempo vertically using teh constraint modifier. +
+ +You have the playhead at point where the dude slams the phone down, and your idea was that 4|1|0 +would be good for this, but you want an accelerando to that point. +
++ Add a tempo ar bar 4. +
+Holding down the constraint modifier, and with snap set to 'TC Frames', grab the BBT ruler just after 4|1|0. +Drag the ruler so that 4|1|0 snaps to the 'phone' frame. +
+Notice what happened : The second tempo was changed.
+You had set a musical position for the second tempo marker. It was not aligned with the frame you wanted, so
+you dragged the BBT ruler, making the second tempo provide enough pulses over the ramp for 4|1|0 to align with the desired frame.
+
If your ramp doesn't feel correct, you may add more points within it and keep adjusting beat positions in a similar manner. +
+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. +
+