If your keyboard is triggering notes that seem too low or high in pitch, your Grandmother’s Keyboard Octave Range has likely been transposed. To lower the octave range by a single octave at a time, press and hold the blue [ SHIFT ] button and then press the green [ < KB ] button. To raise the octave range by a single octave at atime, press and hold the blue [ SHIFT ] button and then press the green [ KB > ] button.