Apple Logic Express 8 - Manual (Page 478)

478 Chapter 19 Quantizing MIDI Events
Important: Event-based quantization destructively alters the position of all MIDI event
types, except note events.
Quantizing Regions
You can quantize selected MIDI regions by changing the value of the Quantize
parameter in the Region Parameter box of the Inspector. Region-based quantization
only works on notes, not on other MIDI data event types, such as MIDI controllers.
The Quantize parameter determines the division of the quantization grid. The extended
region parameters contain advanced quantization parameters, allowing you fine-tune
the quantization grid.
Important: The (region) Quantize parameter is non-destructive. It adjusts the playback
positions of notes in the region on-the-fly when Logic Express is in play (or record)
mode. It does not actually move the notes permanently.
To change the quantization grid division:
m Set the Quantize parameter in the Inspector’s Region Parameter box to the desired
value.
You can also step through the available Quantize values, one at a time, with the Set
Quantize Parameter to Next Value and Set Quantize Parameter to Previous Value key
commands.
This can be done at any time, including when Logic Express is in play (or record) mode.
The new value is immediately used to alter note playback positions.
The Quantize grid options are:
 Quantization Off: The Off setting plays the notes at the finest possible timing
resolution: 1/3840 note, which is unquantized playback, in practical terms.
 Normal Quantization: The 1/1, 1/2, 1/4, 1/8, 1/16, 1/32, and 1/64 note settings
quantize the MIDI region to the equivalent note value.