KORG PA4X 76 - Manual (Page 788)

784| Global settings and preferences
▪ In the lower scale diagram, turn on (black dot shown) the scale degree you
want to be detuned, and turn off (black dot hidden) the scale degree that will
use the standard tuning.
When no preset is selected, a default scale is automatically recalled. This
scale assigns a -50 cent value (equivalent to a quarter tone down) to all
notes, and turns all scale degrees off.
Memorize the new Quarter Tone sub-scale into an SC Preset
1 Choose the Write Quarter Tone SC Preset command from the page menu to
open the Write Quarter Tone Scale Preset dialog.
2 Choose one of the SC Preset locations to save the new scale, then confirm
by touching the OK button.