Apple Logic Pro 9 - Manual (Page 1246)

Pitch
Logic Pro assigns each note to the string on which it is playable, at the lowest possible
position. In order to influence the string assignment, there is a rule (in Pitch mode only)
that a note’s fret position cannot be lower than its MIDI channel.
This method is generally used when notes are recorded from a MIDI keyboard:
• An A3 (on MIDI channel 1) is displayed on the second fret of the G string. If you want
the note to be displayed at a higher position (to correctly display the proper fingering
of a passage), you need to set its channel to 3 or higher. This means that the fret position
cannot be lower than 3, so the note will be displayed at the D string’s seventh fret.
• If the channel is between 8 and 12, the A3 is assigned to the A string on the 12th fret,
and to the low E string (17th fret) for channels 13 to 16.
If you want to force even higher positions, you need to use one of the other assignment
modes.
Channel
In this mode, the number of the string (1 to 6, counted from the lowest string) corresponds
to the MIDI channel. Channels 7 to 16 are assigned to the highest string.
Inv. Channel
Like Channel, but counted from the highest string (1) to the lowest (6 and above). This
way of numbering the strings is generally used in traditional guitar literature.
Note: As most Guitar-to-MIDI Converters send notes (played on different strings) on
different MIDI channels, the Channel and Inv. Channel modes are suitable if you’re using
a MIDI guitar to record MIDI regions. The tablature notation is displayed exactly as the
music was played during recording.
Inv. Ch–1 and Inv. Ch–2
These modes should be used when recording and notating electric bass parts with
Guitar-to-MIDI Converters.
• “−1” is designed for five-string bass (with an additional high B string).
• “−2” is designed for four-string bass.
The principle is the same as Inv. Channel mode, but the number of the MIDI channel is
reduced by 1 or 2, in order to properly convert the channels for bass string assignment.
The string assignment for a four-string bass will be 3 to 6, and 2 to 6 (counted from highest
to lowest string in both cases) for a five-string bass, just as with guitar strings that sound
one octave higher. Notes on channel 1 will be assigned to the highest string.
Further Information on Tablature Notation
In all of these Assign modes, notes below the lowest string are not displayed at all.
1246 Chapter 43 Project Settings in Logic Pro