Apple Logic Pro 9 - Manual (Page 636)

Quantizing MIDI Events
Event-based quantization can be applied to any individual MIDI event (not just note
events) within a MIDI region. Individual event quantization is performed in the MIDI
editors.
The menu bars of the Piano Roll Editor and the Event List include a Quantize pop-up
menu and a Quantize button. This is a separate quantization function, which can be
applied to selected events rather than entire regions.
Quantize pop-up menu Quantize button
The Piano Roll Editor also includes a Quantize tool.
Further quantize operations are also available in the Transform window. These can be
applied to events in one or more selected regions that match very specific criteria. For
details, see
Editing MIDI Events in the Transform Window .
Note: Event-level quantization irreversibly alters the positions of all event types, with the
exception of notes. Note events can be returned to their original record positions.
A Special Note About Quantization in the Score Editor
The primary purpose of the Score Editor is to produce readable—and
printable—notation. Although you can certainly edit MIDI note data in the Score Editor,
and quantize it with the Quantize tool (or the Functions > Quantization commands), it
is best to perform individual note quantize operations in the Piano Roll Editor or the
Event List.
The Quantize pop-up menu shown in the Inspector of the Score Editor serves a purely
graphical function. It alters the way notes are displayed, but it does not affect note
playback in any way.
To quantize events in a region using the Piano Roll Editor or the Event List
1 Open the Quantize pop-up menu in the Inspector’s Region Parameter box, and choose
a quantization value.
636 Chapter 21 Quantizing Audio and MIDI