Repeating the Division
Remove the paper octave and re-tape it between the two vertical lines outlining the space for the 2nd octave. Repeat the identical marking procedure. Then, repeat the procedure two more times for octaves 3 and 4. When finished, you should have all four octaves marked out and be left with a space of about 3” [76.2mm] to the right of octave 4. Tape the paper octave with its left edge on the line where octave 5 would begin, and mark out for the remaining two natural keys and one sharp key (C, C#, and the final D). Your key blank should now look like this.
