Automate mixes with keyframes

To create dynamic, automated mixes, use keyframes. Keyframes change audio volume and score parameters over time. To gradually increase volume, for example, add a –3 dB keyframe at the beginning of a clip and a +3 dB keyframe at the end. Soundbooth automatically calculates, or interpolates, all the intermediate values using one of two transition methods:

  • Hold  transitions create an abrupt change in value at each new keyframe.

  • Linear  transitions create a smooth, gradual change between keyframes.

Transitions between keyframes

A.
Hold

B.
Linear

Add a keyframe

Do either of the following:

  • Position the pointer over a parameter line. When a plus sign  appears, click.

  • Position the current-time indicator where you’d like a score parameter to change. Then click the Add Keyframe icon  for the parameter, or change the parameter value.

Navigate between score keyframes

 In the Editor panel, click the Previous Keyframe  or Next Keyframe  icon for a score parameter.

Display different score parameters

 Select options from the Parameters menu at the top of a score clip.

To quickly adjust score parameters, see Shortcuts for score keyframes.

Select all keyframes for a property

 Right-click any keyframe for the property, and choose Select All Keyframes.

Adjust keyframe values

 Drag a keyframe up or down.

Adjust keyframe time position

 Drag a keyframe right or left.

Change the transition between two keyframes

 Right-click the first keyframe, and choose either Linear to gradually transition from one value to the next, or Hold to abruptly change values.

Delete keyframes

 Right-click a keyframe, and choose Delete Selected Keyframes.