Dividing the Octave
Now, take the 1 octave keyboard you printed out and carefully cut the keyboard out staying just outside of the lines while you cut. When finished, make certain the paper octave measures exactly 6 ½” [165.1mm] wide. Tape the paper between the left edge of the keyboard blank and the first vertical line. You should have 6 ½” [165.1mm] of space and the fit should be perfect. Leave about ¼” [6.3mm] of space between the bottom of the printed octave and the front edge of the keyblank. Now, take a sharp pencil and make a mark below each key head denoting its position. Then, at the top of your paper octave, mark the position of each key tail up to line LM. You should end up with six marks at the front of the blank, and 11 marks at line LM. These marks will divide the first octave into 7 natural keys at the front, and 12 tails (7 natural keys plus 5 sharp keys) at the rear. The marks you need to make are shown in red.
