Apple Logic Pro X - Manual (Page 901)

Chapter 25 Preferences, project settings, and key commands 901
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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 tablature.
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.
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Inv. Ch–1 and Inv. Ch–2
These modes should be used when recording and notating electric bass parts with Guitar-to-
MIDI Converters.
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“−1” is designed for five-string bass (with an additional high B string).
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“−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.