Apple Logic Pro X - Manual (Page 595)

Chapter 19 Make global changes to a project 595
Create a tempo change in the Tempo Operations window
1 In the Tempo Operations window, choose Operation > Create Tempo Curve.
2 Use the Position or Time field to define the area that the tempo change should take place
across: the left field sets the curve start point and the right field, the curve end point.
3 Enter start and end tempos in the Tempo line.
4 Select a curve type.
Three kinds of tempo curves are available from the Curve Type pop-up menu. Each of these
offers a Curvature parameter (the field to the right of the Curve Type pop-up menu), which
determines if the tempo should speed up or slow down, depending on whether positive or
negative curvature values are entered.
5 Adjust the Curvature parameter.
6 Alter the concentration of graphical tempo change events with the Density parameter.
Values of 1/8 and finer should be used only if really necessary (with very slow or fast tempo
changes, for example). Don’t select a resolution higher than 1/8 or finer, just to make the curve
look smoother. This results in an unnecessary amount of processing, and the creation of more
tempo change events than are needed.
As you change the values, the displayed tempo curve (which is calculated from the tempo
settings you’ve made) is shown in red.
Note: The “Continue with new Tempo” checkbox determines whether the original tempo
resumes after the tempo curve ends (unselected), or the new tempo (the last tempo change
event in the curve) is maintained (selected).
7 Click Apply when you're done.
Create a constant tempo curve
m In the Tempo Operations window, choose Operation > Create Tempo Curve, then do one of the
following:
•
To remove all tempo variations between two points without changing the SMPTE time for the
rightmost position: Click the Apply button.
•
To retain the new tempo or return to the initial tempo: Select the “Continue with new Tempo”
checkbox.
Scale tempo changes
1 In the Tempo Operations window, choose Operation > Scale Existing Tempo Changes.
2 Adjust the scaling percentage using the Scale value slider.
Positive percentage values speed up sections, and negative ones slow them down.
Stretch tempo curves
1 In the Tempo Operations window, choose Operation > Stretch Existing Tempo Changes.
2 Define the start point for tempo changes using the Position or Time parameter.
3 Do one of the following:
•
Enter the new end point of the tempo curve as a bar position or SMPTE value.
•
Set a Stretch value for the tempo curve (as a percentage).