Apple Logic Pro 9 - Manual (Page 717)

Note Events
Note events are used to trigger (play) software instruments and external MIDI sound
modules or keyboards.
• Num(ber): MIDI note number (or pitch). The range is from C −2 (note #0) to G8 (note
#127). Middle C is note #60. It’s known as C3 in MIDI terminology. On some keyboards
and synthesizer modules (notably those made by Korg and Roland), the note range is
from C −1 (note #0) to G9 (#127). Middle C is called C4 on such devices. The Display
Middle C As pop-up menu in the Logic Pro > Preferences > Display pane allows you to
alter the display to match your device.
• Val(ue): Velocity of a note from 1 to 127. The zero value (0) acts as a note off message,
and cannot be used.
• Length/Info: Length of the note. Although MIDI can only transfer note on or note off
messages, Logic Pro actually stores the position and length of all notes, which makes
them easier to access musically. The note off message is generated automatically during
playback.
717 Chapter 25 Editing MIDI Events in the Event List