Apple Logic Express 9 - Manual (Page 559)

This detects transients across the audio file, overwriting (after you confirm the action)
any manually added or edited transients.
Note: You can also detect transients in factory audio Apple Loops. This saves a copy of
the audio Apple Loop to the project’s Audio Files folder.
Using the Pencil Tool to Edit in the Sample Editor
You can use the Pencil tool to correct clicks and pops in your audio, by drawing in the
waveform display.
You may find it useful to change the viewing mode of the waveform so that it shows the
data structure. For details, see
Customizing Waveform Display in the Sample Editor .
To correct pops and clicks with the Pencil
1 Navigate to the desired section of the waveform.
Tip: Pops and clicks are often the loudest part of an audio file, so you may find the
Functions > Search Peak command useful when looking for them.
2 Use the zoom controls to magnify the section of the waveform that you want to correct.
3 Use the Pointer tool to scrub the audio around the pop or click.
This will help you to identify exactly where you need to draw.
4 Select the Pencil tool and drag from left to right (including up or down movements) to
draw in a new shape for the waveform spike.
The edges of drawn sections are automatically smoothed.
Press Option to affect both sides of stereo waveforms.
559 Chapter 17 Editing Audio in the Sample Editor