Apple Logic Pro 9 - Manual (Page 975)

In addition, you can also use Score Editor functions designed to speed up the process of
changing the MIDI channel settings of notes, in order to assign them to the specific voices.
These include the Auto Split preference and the Voice Separation tool.
Splitting MIDI Channels Automatically
If you record polyphonic voices as separate passes in real time, you can set your keyboard
or MIDI controller to the appropriate MIDI channel for each voice. This saves you from
editing the channels after the fact. The same applies to step input.
Alternately, you can automatically split MIDI notes using the “Auto split notes in multi
staff chord styles” Score preference.
If this preference is turned on, and the default staff style in the selected Track Parameter
box is a polyphonic style, all played notes are automatically assigned MIDI channels that
match the staff style’s voice assignments. Notes at, and above, the split point are assigned
the channel of the first voice. Notes below are assigned the second voice’s channel. (This
feature only works for two voices at a time.) This creates a rough, but usable, voice
assignment, which can be edited later.
To split regions that have already been recorded
1 Select the region.
2 Choose Functions > Note Events > Assign Channels based on Score Split (or use the
corresponding key command).
The region’s notes are assigned to voices in the staff style, according to the Auto Split
pitch in the Score preferences.
Using the Voice Separation Tool
The Voice Separation tool allows you to draw a separation line between notes on a staff,
thereby assigning them to the MIDI channels of the voices. MIDI channels have to be
predefined for each of the voices that you want to separate. This is because Logic Pro
needs to know which MIDI channels are assigned to each note.
To use the Voice Separation tool to change the MIDI channel of notes
1 Select the Voice Separation tool.
975 Chapter 31 Working with Notation