32.Vibration of cello (intensity): Bout C(66Hz) Pizzicato

Cello has some major resonant places: top and back plate, endpin and scroll


When high tones or middle tones are played on the cello, the vibration is generally maximized around the center of the cello body. However, in the case of lower tones, they seem to swing through the whole length of the body and the endpin (see Fig. 28).

When the tip of the endpin is placed on the floor and the vibration is restricted, the counteraction might cause the cello's lower bouts to amplify their swings, and at the same time it might subdue the vibration of the upper part of cello body (on the opposite side).
In any case, the endpin seems to cause the cello's resonance to be greater or less distorted.


低音(C音)の場合、胴体+エンドピンの全長で振動しているように見えます。エンドピンの先端を床に固定した瞬間、その反作用として底板の振動が増幅させられ、逆に胴体の上部の振動は抑制しているように見える。  ( 参照: Fig.28 )
多かれ少なかれ、チェロの響きはエンドピンによって歪められているようだ。

[ 9/19/2016 ]      Labels:  32..Intensity-Bout

31.Vibration of cello (intensity): Top plate C(66Hz) Pizzicato

Cello has some major resonant places: top and back plate, endpin and scroll


Excluding strings or the bridge, the maximum vibration spot of the cello was unexpectedly found to be the tip of the endpin when the cello was lifted up in the air and a lower C note played (See Fig. 24).
 
空中で低音(C音のピチカート)を弾いた時、エンドピンの先端で胴体のそれを上回る最大強度の振動が観測された。 ( 参照: Fig.24 )

[ 9/19/2016 ]      Labels:  32..Intensity-TopPlate

A0.Advanced Endpin Holder for cello


 
The AEH holds a cello in place while letting the endpin float slightly in the air. Its design allows the vibration both horizontally and vertically.

Please discover the hidden potential ability of your own instrument and enjoy many happy hours by trying this new invention.


(Video: AEH-011 ASH-white, 8 times slower)
(Video: AEH-012 WALNUT-black, 8 times slower)


[ 9/19/2016 ]      Labels:  A0.Advertisement

80.The mechanisms and roles -AEH-

[ 9/19/2016 ]      Labels:  81.Solution & Study1

80.The mechanisms and roles -AEH-

The Advanced Endpin Holder holds a cello while letting the tip of endpin allow the vibration

[ 9/19/2016 ]      Labels:  81.Solution & Study1

A0. FAQ 1


Q. How much improvement in sound is there going to be if I use the Advanced Endpin Holder?


A. Try playing an open string or performing tremolo on the C string or the G string with the tip of the endpin slightly off the floor floating in the air. Then try comparing the sound to the one with the endpin placed normally on the floor.
- Can you hear any difference in resonance or reverberation time?
- Can you feel the difference in articulation or resistance in your bowing hand?
- Can you see any change in the tone?

If you answer yes, you can expect to get a similar sound with the AEH-001and AEH-002 as when you hold your cello off the floor roughly 50% (Half floating state). With the AEH-011 and the AEH-012 you can expect to get the same sound as when you hold your cello off the floor by 60%.

If you answer no, sorry, but you can expect almost no effect of improvement at all. However you can use it as a cool looking endpin stopper.


エンドピンを少し空中に浮かせて、通常奏法時と比較してみてください。(少しかもしれませんが)響き・残響時間・発音・右手の負荷・音色に違いがありますか?
イメージとして、AEH-001・AEH-002では50%、AEH-011・AEH-012では60%浮かせた状態を実現します。

[ 9/19/2016 ]      Labels:  A0.Advertisement

32.Vibration of cello (intensity): Bout G(98Hz) Pizzicato

[ 9/18/2016 ]      Labels:  32..Intensity-Bout

31.Vibration of cello (intensity): Top plate G(98Hz) Pizzicato



[ 9/18/2016 ]      Labels:  31..Intensity-TopPlate


10.1 Theme


[ 9/18/2016 ]     Labels: 10.Theme & Topics

Why is the resonance of a modern cello slightly different from a baroque cello?

Why do modern cello players meet some resistance from strings?





63.Wolf tone (slow-motion video)


Wolf tones are created on the cello mainly at E tone or at F tone.
Let's compare the E tone on the D string (first position) and on the G string (fourth position) by a 32-times slower video. (E = 166 Hz, up-bowing)

All other tones seemed to be a complex waveform. Each component waveform, some come from a reflection inside the cello body, others can be newly created by friction between bow and string, merges together and is then replaced by new-born waveforms. It is really natural and ever-changing.

Meanwhile, the E tone, like a sine wave, is special. It seems like an obstinate unified waveform that does not allow any other elements.
When the input from a player goes beyond the limit, a new exact opposite phase waveform will be created in no time, then waveforms suddenly disappear or are nullified.
It is like a symptom of 'arrhythmia' (:abnormal rhythm or disappearance of pulse).

 
チェロのE(またはF)音はサインカーブのような1ビート波形です。その波形に取り込めないインプットが行われると逆位相の波形を生成して、突然消える。ウルフトーンは「不整脈」に似ている。

[ 9/18/2016 ]      Labels:  63.Wolf tone

A1. ADVANCED ENDPIN HOLDER

[ 9/18/2016 ]      Labels:  A1..AEH

チェロを床に寝かせて置いて、例えばC線弦をはじいてみてください。
チェロの胴体が振動します。底板も振動しています。 底板に固定されているエンドピンも振動します。


目では識別できませんが、エンドピンの先端に触れると意外と大きく振動しているのがわかります。次に、振動している    エンドピンの先端を握ってその振動を抑止すると、逆に楽器の響きが僅かに変化するのに気づきます。
チェロがモダンチェロへと改良されて以来、約200年が経つと言われ、エンドピンはチェロの演奏性に大いに貢献しています。しかし、エンドピンをそのまま床に突き刺して先端を1点に固定してしまうと、楽器の一部の自然な響きが損なわれ(抑制され)てしまう可能性があることを意味します。

エンドピンをつけたまま響きを損なわないでチェロを保持することは可能でしょうか。
ADVANCED ENDPIN HOLDER は、エンドピンを含めてチェロをわずかに空中に浮かせて保持します。


楽器胴体からエンドピン先端に伝わってくる振動を、垂直方向及び水平方向ともに可能な限り生かし、エンドピンの先端に自由度を保たせながら、柔らかく保持する構造となっています。   

その結果、エンドピンを床に突き刺して演奏する時(ゴムキャップをつけた場合もほぼ同様)と比べて、次の改善効果が期待できます。    


    (1) 楽器本来の自然な共鳴振動に近づけることができ、柔らかで心地よい倍音に富んだ響きが生み出されます。


    (2) 特に中・低音域で、弦からの抵抗が減り、音の分離と発音が良くなり、奏者はよりスムーズで細かな表現が可能になります。
   
デリケートな音の世界の話ではありますが、バロックチェロの響きの良さ・発音の良さのを想像させるような心地よい新たな響きと発音の世界を体験することができます。

A1. Advanced Endpin Holder

 [ 9/18/2016 ]      Labels:  A1..AEH

Try placing your cello on the floor, pluck the C string and watch the body vibrate. The bottom plate (lower bout ribs) and the endpin fixed to it both vibrate as well. Although you cannot see the vibration, you can feel if you touch the tip of the endpin. The vibration is stronger than you may think. If you stop the vibration by holding the tip of the endpin, you will notice a subtle change of sound. 

The first modern cello is said to have been created about two hundred years ago with the introduction of the endpin, which helped to greatly enhance the instruments performance. However, with the endpin fixed in one place on the floor there is a possibility of spoiling the cello's natural resonance.
Is it possible to hold a cello in place with the endpin without losing its perfect sound? 


The Advanced Endpin Holder holds a cello in place while letting the endpin float slightly in the air. Its design allows the vibration from the cello's body through the point of the endpin, both horizontally and vertically, to sustain as well as possible. At the same time it gently holds the cello in place, leaving room for the tip of the endpin to vibrate. 


Consequently, you can expect the improved effects listed below in comparison to the sound achieved  when either resting an endpin directly onto the floor or with a rubber cap attached. 


1. The Advanced Endpin Holder enables the cello's sound to be close to an original natural resonant vibration and provides gentle and comfortable sounds with full harmonic overtones.  


2. It enables the player to perform with more sensitive expression as it improves the articulation and separation of the sounds by reducing the resistance from the strings, especially in the middle and lower range of sound.  


You can experience an unknown field of improved sound and an articulation which is reminiscent of the Baroque cello's splendid sound and clear articulation.

A1. Advanced Endpin Holder

Advanced Endpin Holder

Advanced Endpin Holder


Advanced Endpin Holder enables a cello player to perform with more sensitive expression and articulation

Advanced Endpin Holder
improves resonance and response on your cello.

[ 9/18/2016,,, ]      Labels:  A1..AEH

A1. Advanced Endpin Holder

Advanced Endpin Holder enables a cello player to perform with more sensitive expression and articulation


Advanced Endpin Holder
improves resonance and articulations on your cello.
- Currently o
fficial sales suspended -

[ 9/18/2016,,, ]      Labels:  A1..AEH 

30.Vibration of cello (intensity): Advanced Endpin Holder G(98Hz) Pizzicato


The Advanced Endpin Holder allows the tip of the endpin to vibrate. 

[ 9/16/2016 ]      Labels:  30.Vibration-Intensity

30.Vibration of cello (intensity): Advanced Endpin Holder C(66Hz) Pizzicato


The Advanced Endpin Holder allows the tip of the endpin to vibrate.

[ 9/16/2016 ]      Labels:  30.Vibration-Intensity

32.Vibration of cello (intensity): Bout A(221Hz) Pizzicato

[ 9/16/2016 ]      Labels:  32..Intensity-Bout

31.Vibration of cello (intensity): Top plate A(221Hz) Pizzicato

[ 9/16/2016 ]      Labels:  31..Intensity-TopPlate

30.Vibration of cello (intensity): Measuring equipment



Let's try to measure the real vibration intensity of a cello.

Device: Vibration meter VB-8205SD
Cello: Made in Germany around 1905.
Endpin: Steel pipe

The intensity of vibration:
The most sensible indication of vibration, is known as 'velocity' (the changing rate of displacement to time, mm/sec etc.) within the frequency range of 10 to 1000 Hz.

Originally planned measuring points are dotted on the cello and the endpin as seen in the photo.
Ten measurements were taken by playing mezzoforte pizzicato and averaged at each point.


バイブレーションメーターを使って実際のチェロの振動を測定してみました。
ピチカート音を10回測定して平均しました。この周波数領域では「速度(mm/s)」が近似の指標となります。

[ 9/16/2016 ]      Labels:  30.Vibration-Intensity

20.Vibration of cello (slow-motion video) : Scroll




The cello has 3 major resonant places: The body center, the endpin and the scroll.

 C (66 Hz) pizzicato, 32 times slower,  2 measurements
Scroll swings in 1 beat.
 
チェロの"スクロール・ペグ"の共振動。
チェロの3大共振場所は、①胴体の中心付近、②エンドピン、③スクロール(渦巻き・ペグ)のようです。

[ 9/16/2016 ]      Labels:  20.Vibration-Video

20.Vibration of cello (slow-motion video) : C-G-D-A string




C (66 Hz), G(98Hz), D(147Hz), A(221Hz)   -pizzicato-
40 times slower, 960 fps.

In order to minimize any interference, the endpin was removed.
C string swings in 1 beat.
 
エンドピン無しで、チェロの弦振動をスローモーションで撮ってみました。
オシロスコープの表示は、マイクで集音し変換しているために少々時間に遅れがあります。

[ 9/16/2016 ]      Labels:  20.Vibration-Video

10.0 Theme cover photos



A hovering kite at Takobana, JAPAN (島根半島多古鼻、海上を滑空する一羽のとんび)

A hovering kite at Takobana, JAPAN

島根半島多古鼻、海上を滑空する一羽のとんび。

[ 9/16/2016 ]      Labels:  10.Theme & Topics