Apple Logic Pro 9 - Manual (Page 564)

You can set the desired maximum level in the Function Settings window, which you can
open by choosing Functions > Settings (or by clicking the Settings button in the Normalize
dialog).
Set the desired maximum level (as a percentage or in decibels) in one of the “Peak at”
fields.
Tip: You should not choose 100% (0 dB) in these fields, as this may result in clipping
should you wish to increase the gain of the overall signal afterward, say with an EQ. A
good rule of thumb is to leave yourself at least 3-to-6 dB of headroom, to allow for further
audio processing tasks, such as mixing and effects processing.
These settings are automatically stored in Logic Pro preferences when Logic Pro is closed,
and they apply to all projects.
Fading Audio Files in the Sample Editor
You can destructively fade in or out on an entire audio file, or a selected area.
• Fade In: Volume is set to 0 at the start point of the selected area, and the fade-in occurs
over the length of the selection.
• Fade Out: Volume is set to 0 at the end point of the selected area, and the fade-out
occurs over the length of the selection.
The fade-in or fade-out time is determined by the selected area within the audio file.
To create a fade-in or fade-out
1 Use any of the selection techniques outlined earlier in the chapter to determine the length
of the fade-in or fade-out area.
2 Do one of the following:
• Choose Functions > Fade In (or use the corresponding key command, default
assignment: Control-I) to create a fade-in.
• Choose Functions > Fade Out (or use the corresponding key command, default
assignment: Control-O) to fade passages out automatically.
564 Chapter 17 Editing Audio in the Sample Editor