Apple Soundtrack Pro 3 - Manual (Page 236)

You hear the first of the two actions. The checkbox of the second action appears deselected
in the Actions list.
3 Do one of the following:
• Choose Process > A/B Last Two Actions again.
• Choose A/B from the Actions pop-up menu (or press Command-F1) again.
You hear the second of the two actions. The checkbox of the first action appears deselected
in the Actions list.
Deleting Actions
You can delete an action if you decide you no longer want it in the project.
To delete an action
µ
Select the action in the Actions list, then press Delete.
Limitations of Actions That Change the File’s Length
Some actions change the overall length of the audio file by inserting or deleting audio.
These include inserting silence, noise, or a waveform, time stretching, and deleting part
of a file. Recording audio, pasting, and adding an effect with a “tail” can also change the
file’s length. In the Actions list, the selection checkbox for each action that changes the
file’s length appears red, making it easy to visually distinguish those actions.
Each selection you make in the File Editor applies to a specific range of time, and each
action applies to a range of time defined by the selection at the time the action is applied.
Because selections and actions apply to a range of time, changing the file’s length can
change the audio to which a selection or action applies. In the File Editor, you see the
selection remain in the same place (the same range of time as shown in the Time ruler)
and see the waveform under the selection change.
When you apply an action that changes the file’s length, any existing selections apply to
the same range of time, but the audio occupying that range of time may be different
than when you applied the action. For example, if you select a range of time beginning
five seconds after the start of an audio file, then insert one second of silence at the
beginning of the file, the selection still begins five seconds after the start of the file, but
the audio at the beginning of the selection corresponds to what was previously four
seconds after the start of the file.
236 Chapter 8 Working in the File Editor