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Lock position in the Piano Roll Editor in Logic Pro

There may be times you want to protect some events in MIDI regions from being moved; for example, when they are synchronized to visual events in a movie. You may have already created the music for the scene but then are asked to increase the tempo to match several cuts of different camera angles in the corridor. Changing the tempo moves the events, resulting in events being out of sync. Instead, you can lock the events to an absolute (SMPTE) time position to protect their position and keep them in sync with the tempo.

To lock the time position of events, Enable Complete Features must first be selected in Logic Pro > Preferences > Advanced.

Lock the position of one or more selected events

  • In Logic Pro, choose Functions > Lock SMPTE Position in the Piano Roll Editor menu bar (or use the corresponding key command).

    This command ensures that events that fall at a particular absolute time position—1 hour, 3 minutes, 15 seconds, 12 frames, for example—remain at this exact position regardless of tempo changes.

Unprotect protected events

  • In Logic Pro, choose Functions > Unlock SMPTE Position in the Piano Roll Editor menu bar (or use the corresponding key command).

Logic Pro User Guide: Apple Books | PDF

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