Select Same Channels    ⇧H

Selects all events that have the same MIDI channel.

Select events in the Logic Pro Event List — Apple Support

Same MIDI Channel (or press Shift-H): Selects events on the same MIDI channel.

  Select Lowest Notes    ⇧↓

Select the lowest notes in each chord. From here the notes can be assigned to a different MIDI channel, instrument, etc.

Split chords in the Piano Roll Editor — Logic Pro X

Choose Edit > Select > Lowest Notes to select the lowest notes in the chords.

Split chords in the Piano Roll Editor in Logic Pro — Apple Support

These commands can be used with regions containing chords to separate the top note of each chord (often the melody), or to separate the bottom note of each chord for a bass line. Once selected, the notes can be cut or copied, and pasted into a region on a different track.

Note: Highest Notes and Lowest Notes only select the notes. They can be used in conjunction with other editing commands, such as Cut, to move a voice into another MIDI region.

  Region Automation: Control Change 30

Open/Set Region Automation to Control Change 30 (CC30). It is possible to write “programs” for MIDI devices that aren’t notes being played.

The MIDI specification lists CC30 as “undefined”. Device (software) manufacturers are free to use CC30 for their own purposes.

You can find the standard definitions of continuous controllers (CC) in the latest version of the MIDI Implementation Chart v2.

  Apply Buffer Template to Cable(s)

Set the attributes of selected cables to those contained in the buffer template.

Highly unlikely that I will be building a virtual mixing desk or instrument.

Object groups in the Logic Pro Environment — Apple Support

When building a virtual mixing desk or synthesizer layout in the Environment, you often need to work with large groups of fader objects that have the same size, regular spacing, or a similar definition.

To save time on the definition and alignment of these groups, you can choose (one or more) objects as prototypes (templates) by copying them into the Clipboard. (Choose Edit > Copy.) You can then apply certain characteristics of these template objects to selected objects.