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Quantize pitch in the Piano Roll Editor in Logic Pro for Mac
In Logic Pro for Mac, you can quantize the pitch of notes in MIDI regions to a particular scale or key. This is especially useful when you want to reuse a repeating pattern of notes, but transpose them to a different key.
Quantize the pitch of notes in a MIDI region
In the Logic Pro Piano Roll Editor, select the notes you want to quantize.
Choose the scale and key from the Scale Quantize pop-up menus.