Apple Logic Express 8 - Manual (Page 511)

Chapter 20 Editing MIDI Events in the Transform Window 511
To randomly change the pitch of MIDI note events:
1 Choose the following settings in the Transform window:
 Mode menu: Apply operations to selected events,
 Selection Conditions area: Set Status to Note.
 Operations area: Set Pitch to +–Random, and set the max deviation from the root
note in the field below. If you set a value of 12, you’ll achieve a deviation of one
octave up and one down (two octaves, around the root note, in other words).
2 Click Select and Operate.
∏
Tip: To restrict the randomness to one direction—up or down, as opposed to both—
use the other Random Option, which limits the range that notes fall into.
To make note selections for edit operations:
1 Choose the following settings in the Transform window:
 Selection Conditions area:
 Set Status to Note.
 Set Position to Inside, and choose the desired range.
2 Click the Select Only button.
All notes in the defined range will be selected for you to cut, move, or whatever …