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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.

Figure. Different vote velocities indicated by colors in Piano Roll Editor.

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.

Edit the velocity of notes using the pointer

In the Logic Pro Piano Roll Editor, do one of the following:

  • Select one or more notes, then drag the Velocity slider in the Piano Roll Editor header left or right.

    Figure. Changing the value of three note events with the Velocity slider in the Piano Roll Editor header.

    If the MIDI data format is set to display as 0.0–127.9 or Percent, press and hold Shift while dragging the Velocity slider to adjust the value in finer increments. See General View settings.

  • Drag over a note vertically with the Velocity tool. You can select the Velocity tool from the Tool menu, or you can press Control-Command to temporarily change the Pointer to the Velocity tool.

    A help tag showing the note velocity updates as you drag. The line inside the note also updates to show the velocity change.

    Figure. Piano Roll Editor showing Velocity tool over note event.

If the MIDI Out button in the Piano Roll Editor menu bar is active, the note sounds as you drag.

When you edit the velocity of multiple notes, the relative differences in their velocity values are retained. If the velocity value of any of the selected notes reaches the minimum or maximum value (0 or 127), none of the notes can be adjusted further.

You can override this behavior by pressing and holding Option while dragging. This allows you to continue altering the velocity values until the selected note reaches the minimum or maximum value. By overriding, the velocity relationship of this note to the other notes is altered.

Edit the velocity of notes using Musical Typing or a music keyboard

  1. In the Logic Pro Piano Roll Editor, double-click the MIDI In button if it is not engaged, or Option-click the MIDI In button if it is already active.

    The MIDI In button changes to a white outline against a red background to indicate you can use it to edit notes.

  2. Select one or more notes.

  3. Play a note on your Musical Typing or music keyboard.

    The velocity of the selected notes changes to that of the played note.

Assign the same velocity value to selected notes

  • In the Logic Pro Piano Roll Editor, press and hold Option-Shift while dragging one of the notes with the Velocity tool.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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