The dimensions or adjusted dimensions of the inner bore create or decide most of the sound of a shakuhachi. For example, if a maker crafts a shakuhachi in one-piece and leaves the inside mostly or all-natural (jinashi) then nature determines most of the sound, though it’s up to the maker to bring that sound out and balance it. Alternatively, if the length is adjusted by cutting and jointing and or if the inner bore is shaped by applying paste, then the character of the original bamboo can be slightly augmented or completely changed. Finger-hole placement and size determine the pitch, what techniques will work or not work, how well techniques will work, the volume, and a good portion of the sound. The dimensions of the blowing-edge or “utaguchi” also plays a large role in the overall sound and play-ability with mere millimeters of change to this area having a profound effect.