Akai APC mini mk2 User Manual page 16

Use the eighth row of Clip Buttons to set the base octave for the pads. Press and
hold one of these buttons to display the current octave setting in the matrix. For
instance, if -1 Octave is selected, the pad matrix would appear like the following:
To exit Note Mode editing, release both Shift and the seventh Scene Launch
Button (Note), and the Clip Buttons will change color to reflect the updated
selections.
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