10.6

Table Of Contents
508Logic Pro User Guide
Normalize audio files in Logic Pro
Normalization is a process that raises the maximum level of a digital signal to a specified
amount—typically to its highest possible level without introducing distortion.
In the Audio File Editor, you can set the maximum level (as a percentage or in decibels) in
one of the “Peak at” fields in the Function Settings window (choose Functions > Function
Settings or click the Settings button in the Normalize dialog).
These settings are automatically stored in Logic Pro preferences when the app is closed,
and they apply to all projects.
Tip: You should not choose 100% (0dB) in these fields, as this may result in clipping
if you need to increase the gain (with an EQ, for example) of the overall signal later in the
production process. A good rule of thumb is to reserve 3 to 6dB of headroom or more, to
allow for further audio processing tasks, such as mixing and effects processing.
Normalize the selected area of an audio file
Choose Functions > Normalize from the Audio File Editor menu bar (or pressControl-N).
Logic Pro locates the point with the highest volume in the selected area, and determines
how far it is from the maximum possible level. The level of the selected area is then
raised by this amount. The dynamic relationships of sample levels within the audio
passage remain unaltered.
Tip: The start and end points for the section being normalized should generally
not fall within a continuous section of audio because this results in abrupt increases
in volume after normalization. The start and end points should therefore be located in
sections that occur just after, or before, musical gaps.
Add fades to audio files in Logic Pro
You can destructively fade in or out on an entire audio file, or a selected area in the Audio
File Editor. Your changes are written to the file.
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.