Apple Logic Pro X - Manual (Page 362)

Chapter 12 Edit MIDI regions in the Piano Roll Editor 362
Split chords in the Piano Roll Editor
The following functions let you divide chords by pitch and assign notes to different MIDI channel
by pitch.
Select the top or bottom note of selected chords
Do one of the following:
m Choose Edit > Select > Highest Notes from the Piano Roll Editor menu bar to select the highest
notes in the chords.
m Choose Edit > Select > Lowest Notes to select the lowest notes in the chords.
These commands can be useful for separating a melody from its accompanying chords, or
separating a bass line, for example. Once separated, the lowest notes can be cut and pasted into
a region on a different track.
Note: Highest Notes and Lowest Notes only select the notes, so they can be used in conjunction
with any of the editing commands, such as Cut, to move a voice into another MIDI region.
Assign notes to different MIDI channels by pitch
1 Select the notes you want to reassign by clicking keys on the keyboard along the left edge of the
Piano Roll Editor.
•
Shift-click to select multiple keys.
•
Drag across the keyboard to select a range of contiguous pitches.
2 Choose Functions > Set MIDI Channel to Voice Number from the Piano Roll Editor menu bar.
Logic Pro assigns MIDI channel numbers (in ascending order) to individual note pitches in the
selected MIDI region. The highest note pitch in each chord is assigned as MIDI channel 1, the
next note down in each chord channel 2, and so on.
Note: The use of these commands results in changes to the MIDI region, which will contain
information spread across multiple MIDI channels, following the operation.
After using the Set MIDI Channel to Voice Number function, you can create a new MIDI region for
each note by using the Edit > Separate MIDI Events > By Event Channel menu command in the
Tracks area. Each region created from this process can then be assigned to a different track (and
channel), allowing different instruments to be assigned for each voice.