Edit velocity in the Piano Roll Editor in Logic Pro for Mac
Each note in the Piano Roll Editor displays a horizontal line. The length of the line relative to the overall length of the note shows the note’s velocity. Velocity indicates how hard the key was struck when the note was played, which usually corresponds to the note’s loudness (the MIDI velocity range is from 0–127, with 127 being the loudest). Velocity can also control other synthesizer parameters, such as filter resonance or cutoff, alone or in conjunction with volume level.
Note: The format of displayed velocity values can be changed in the Display MIDI Data As pop-up menu. See General View settings.
You can also display velocity using different colors, by choosing View > Set Note Color > By Velocity from the Piano Roll Editor menu bar. When this command is chosen, higher velocity notes appear in warmer colors, and lower velocity notes appear in cooler colors.
Color coding makes it easy to see the velocity of individual notes, and to see the overall range of velocities in a MIDI region. As you change the velocity of the notes, their color changes in real time.
To learn more about color assignments in the Piano Roll Editor, see Change colors in the Piano Roll Editor in Logic Pro.
Note: You can also edit note velocity in the Automation/MIDI area under the note display grid. See The Automation/MIDI area in the Piano Roll Editor in Logic Pro.