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Tuning method of the "尺八"
Preface
The tuning of the "尺八" is an extremely technical and empirical thing, but it is necessary to understand a principle.
It is important "indeed" I understand, and to tune.
1 resonance theory
 1.1 Theory of Helmholtz
  ①A "尺八" has to know how the pitch and the resonance of the sound are
    established.Can understand it by a flask to show in the chart below
     by a theory of Helmholtz; do.
   ②The resonance frequency is inversely proportional to a volume and
     length to show it in the chart below. In other words, a volume is
     big; of the pipe.If length becomes long, a resonance frequency
     lowers and thinks that I can understand that the resonance frequency
     becomes higher if a volume is small, the length of the pipe is short
     again and the area of the pipe grows big.
 Resonator of Helmholtz
ω = resonance frequency
1.2 Principle tuning of the "尺八"
  (1)Resonance theory
    ①In the case of a "尺八" the pipes from manner of composing"歌口"
      to a hole volume V, the length to a hole L,I can think with area
      of the internal hole S of the pipe
      In addition, the volume of hole itself will be included in the
      volume, too
    ②When the pitch of the applicable hole is high, lengthen length from
      manner of composing "歌口" from the principle mentioned above; or
      is the small in a hole
      It turns out that you should deal in doing that it bloom
      I adjust both balance and actually tune it
    ③When the pitch of the applicable hole is low, shorten length from
      "歌口", or do make a hole big; a pair I deal
      I adjust both balance and actually tune it
    ④Hole itself functions as a resonance melody
      Therefore, the tuning each hole in each pitch
      I delicately influence it 
    

    


Comparison of a flask of Helmholtz and the "尺八"
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