Apple Logic Pro 9 - Manual (Page 633)

Important: Unlike other region playback parameters (Delay, Transposition, and so on),
the value chosen from the Quantize pop-up menu affects the way notes are displayed
in the MIDI editors. Thus you can see the effect of the chosen Quantize value by looking
at the note positions in the Piano Roll Editor, for example.
Quantized MIDI events Unquantized MIDI events
Region quantization affects the whole audio or MIDI region. An alternate method for MIDI
regions is to perform event-level quantization in the MIDI editing windows (see
Quantizing
MIDI Events ).
Quantizing Phase-Locked Audio Tracks
You can apply phase-locked quantization to audio regions on grouped tracks while
maintaining phase accuracy among the tracks. All transients in audio regions of grouped
tracks are taken into account and a quantize marker is added for the first transient in each
transient cluster. These quantize markers are then used to apply the chosen quantization
scheme to all regions.
Important: For phase-locked audio quantization to be possible, all audio regions on
grouped audio tracks must have the same start and end positions.
You first need to group the required audio tracks and enable them for phase-locked
editing. It’s advisable to do this before you record the tracks, but you can do this afterward
if necessary. However, you need to create the group before you start editing the tracks.
To create a group of audio tracks and enable that group for phase-locked editing
1 Select multiple audio channel strips in the Mixer.
2 Click the Group slot of one of the selected channel strips, and choose an unused group
from the pop-up menu.
This opens the Group Settings window.
633 Chapter 21 Quantizing Audio and MIDI