Logic Pro X keyboard command of the day. #LogicProX @StudioIntern1

  Delete Duplicated MIDI Events    ⌥D

The definition of “Duplicated” is important to know. It is in the documentation. Essentially a duplicate MIDI event as defined by position, channel, and number, the value of the event is ignored. Works on the selected region.

Always good to know what will really happen when you invoke the command.

Delete notes in the Piano Roll Editor — Logic Pro X

Any events occurring twice or more at the same position (and pitch) are deleted, allowing one to remain. This is true regardless of whether the duplicates have different velocity, aftertouch, or controller values. Events on different MIDI channels are not considered duplicates.

⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND