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JP2011035851

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DESCRIPTION JP2011035851
[Problem] When playing an ensemble sound source with another type of musical instrument by
automatic violin, the volume and tone of the accompaniment instrument can not be reproduced
sufficiently. SOLUTION: An audio signal of the same sound source is branched, an automatic
performance of a violin is performed by one audio signal, a dynamic speaker is sounded by the
other audio signal, and further automatic adjustment is performed by adjusting the volume of
both to a preferable balance. Accompanied by the voice of the actual performance from the high
frequency band created by the violin to the ultrasonic band, and the tone and sound unique to
the performer and used instrument in the audible tone band reproduced by the dynamic speaker
and the volume and tone of the accompaniment instrument A sound source reproduction effect
with a high degree of actual play reality is exhibited by superimposing the faithful voice in a wellbalanced manner and adding the advantages of both. [Selected figure] Figure 1
Superimposed playback device with violin and speakers
[0001]
In the present invention, a violin and a speaker automatically play the same sound source at the
same time as a violin automatically performs using a sound source, and a listener and a listener
can adjust the volume of both to enjoy a mixing sound effect. The present invention relates to a
superimposed reproduction apparatus according to the present invention.
[0002]
As one of the problems of stereo systems, performance limitations of dynamic speakers in high
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frequency bands have been pointed out for a long time.
As a countermeasure, tweeter for treble and many other ideas have been made, but the effect of
satisfying level is not always obtained, and there has been great dissatisfaction, especially in
playing string music.
[0003]
Furthermore, in recent years, it has been a long time since stereo system lovers have fallen
sharply. One of the major causes is the conversion of recording media from LP records to music
CDs. When comparing the frequency analysis and comparison between the audio signal of the LP
record and the audio signal of the music CD produced from the same source, the difference is
particularly pronounced in the high frequency band. The music CD not only completely lacks
ultrasonic band sound of 22.05 KHz or higher at a sampling frequency of 44.1 KHz, but is
considerably more than LP records in a frequency band of 10 KHz or higher in the frequency
band of 22.05 KHz or lower Voice energy is diminishing. These differences are particularly
noticeable in the reproduction of overtones ranging from the audible range of a stringed
instrument to the ultrasonic range, and in the reproduction of square waves such as attack
sounds, and music CDs have the brilliance of sound that LP records had. There is no doubt that it
has lost its full appeal and has caused a sharp decline in sales.
[0004]
On the other hand, the inventor proposed an automatic violin that automatically plays an
instrument by connecting a piezoelectric vibrator that vibrates with an audio signal to a violin
piece as an automatic musical performance method that is largely different from the speaker
system (Patent Document 1). In this automatic violin, a player excites a piece with an audio signal
instead of playing a whistle with a bow, and the whole musical instrument is vibrated and played
like rubbing. Since the vibration mode of the musical instrument is similar to the performance by
the performer, in particular, in the automatic performance by the stringed instrument source, a
real sound is created due to the vibration of the musical instrument itself beyond the concept of
mere "reproduction" (see Non-Patent Document 1) ). The sound includes not only human audible
sound but also ultrasonic waves. Therefore, there is a big feature that the brilliant reality feeling
of the real performance which can not be obtained with the conventional normal reproduction
system is fostered.
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[0005]
However, this automatic violin has the following two problems. First, since many available
stringed musical instrument sound sources are accompanied by piano and orchestra
accompaniment, it is difficult for one violin to reproduce the volume and tone of the
accompaniment. The second was the reproduction of the timbre and sound included in the sound
source. The violin, in particular, has the distinctive timbre and sound of classic instruments such
as Stradivarius and Guarnerius. Even better performers have unique playing styles and tones. On
the other hand, automatic performances usually use instruments that are very different from the
famous instruments, so the excellent timbre and sound included in the sound source can be
reproduced to some extent, but more are used It was to be obscured by the characteristics of the
instrument. As a solution to the second problem, the inventor has proposed a method of
separately recording a solo sound and an accompaniment sound of a stringed instrument, and
reproducing the same synchronously to play together (Patent Document 2). However, this
method is limited in widespread use in that it requires special production of dedicated software
therefor.
[0006]
Patent Document 1: Japanese Patent Application Publication No. 2008-034998 Patent
Application No. 2009-049656
[0007]
C.M.
Hutchins "Sounds of Violin", Science, 1981
[0008]
The problem to be solved is that, when the violin automatically performs the ensemble sound
source with other types of instruments, the volume and tone of the sound source violin and the
accompaniment instrument can not be sufficiently reproduced.
[0009]
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The present invention splits voice signals of the same sound source, automatically plays a violin
with one voice signal, causes a dynamic speaker to be pronounced with the other voice signal,
and further adjusts the volume of both to a preferable balance. Voice of real performance
ranging from high frequency band created by automatic performance to ultrasonic band, and
tone color and sound of performer and used instrument in the audible sound band reproduced by
dynamic speaker and volume and tone of accompaniment instrument The most important feature
is to exert a sound source reproduction effect with a degree of reality close to that of a real
performance by superimposing in a balanced manner the sound accompanied by and adding the
merits of both.
[0010]
The superposition reproduction apparatus by the violin and the speaker according to the present
invention branches the audio signals of the same sound source and amplifies them by
independent amplifiers to obtain the volume of the violin by one audio signal and the dynamic
speaker by the other audio signal. In order to adjust the volume independently, the volume of
wide band voice ranging from the high frequency band created by the violin to the ultrasonic
band, and the audible tone band with the tone and sound unique to the performer and the used
instrument generated by the dynamic speaker Since the volume can be balanced between the
voice and the volume of the accompaniment instrument voice, it is highly appreciated that the
lack of broadband voice ranging from the high frequency band to the ultrasonic band in music
CDs and dynamic speakers is satisfied There is an advantage that you can enjoy the concert
sound.
[0011]
FIG. 1 is an explanatory view showing the configuration of the device of the present invention.
(Common to Each Embodiment) FIG. 2 is an explanatory view showing a cross section of a violin
attached with a piezoelectric vibration / transmission unit.
(Common to Each Embodiment) FIG. 3 is an explanatory view showing a configuration example of
the piezoelectric vibration / transmission unit.
(Common to Each Embodiment) FIG. 4 is an explanatory view showing the structure of the
vibration transmission body. Example 1 FIG. 5 is an explanatory view showing the structure of a
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vibration transfer body. (Embodiment 2) FIG. 6 is an explanatory view showing the structure of a
vibration transmitter. (Embodiment 3) FIG. 7 is an explanatory view showing the structure of a
vibration transmitter. (Example 4)
[0012]
The goal is to realize a highly realistic music source reproduction close to the actual
performance, using the same sound source, the volume of wide-band sound ranging from the
high frequency band to the ultrasonic band by the automatic performance violin, and audible by
the dynamic speaker This was realized by adjusting the volume of the band sound independently
to obtain an optimum superimposed sound.
[0013]
FIG. 1 is a diagram showing the configuration of a first embodiment in which the device of the
present invention is realized, in which 1 is a player of an audio medium, and 2 is an audio signal
splitter branching into an automatic violin line and a speaker line.
3 is an automatic violin amplifier connected to an automatic violin line, and 4 is a speaker
amplifier connected to a speaker line. Reference numeral 5 is an automatic violin in which a
piezoelectric vibration / transmission unit is attached to a piece, 5-1 is a violin, 5-2 is a
piezoelectric vibration / transmission unit, and 6 is a dynamic speaker. L and R respectively
indicate a stereo left audio signal line and a right audio signal line, each of which is branched by
the audio signal splitter 2 and connected to the automatic violin amplifier 3 and the speaker
amplifier 4 respectively. Input to violin 5 and dynamic speaker 6
[0014]
Here, the audio medium to be applied to the player 1 can be applied to any one of magnetic tape,
LP record, music CD, and the like.
[0015]
The audio signal splitter 2 splits the stereo signal lines L and R from the player 1 into a stereo
automatic violin line and a stereo speaker line, respectively.
[0016]
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The automatic violin amplifier 3 is an amplifier having a frequency characteristic adapted to the
tone generation frequency band of the violin.
That is, an amplifier having high frequency characteristics is applied to cope with high frequency
harmonics up to ultrasonic waves.
By changing the amplification factor of the automatic violin amplifier 3, the volume of the
automatic violin 5 is adjusted.
[0017]
The automatic violin 5 comprises a violin 5-1 and a piezoelectric vibration / transmission unit 52. In the description of this embodiment, although 5 is an automatic violin to simplify the
explanation, it goes without saying that 5 can be applied to any violin musical instrument other
than violin. However, in this case, for example, in the case of a cello, the violin amplifier 3 is used
as a cello amplifier, and an amplifier having a wide frequency band characteristic ranging from
the low range to the high range is applied. In addition, since the violin applied in the present
invention plays a role of only the musical instrument actual playing effect, it has a great feature
that it does not require an expensive name instrument.
[0018]
FIG. 2 is a view showing a cross section of the violin 4 in which a piezoelectric vibration /
transmission unit including the piezoelectric vibrator 1 and the vibration transmitter 2 is coupled
to the piece 3. The piezoelectric vibrator 1 vibrates by the audio signal of the voice medium, and
this vibration excites the piece 3 via the vibration transmitter 2, and the vibration of the piece 3
vibrates the top plate of the musical instrument. The vibration of the top plate is transmitted to
the back plate through the soul column in the trunk and vibrates the back plate. Thus, the
vibration of the piezoelectric vibrator 1 causes the entire musical instrument 4 to sound, and the
musical instrument 4 emits the same sound as rubbing by the player.
[0019]
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FIG. 3 is a view for explaining a piezoelectric vibration / transmission unit comprising the
piezoelectric vibrator 1 and the vibration transmitter 4, and 5 is a sectional view of a piece. In
this embodiment, as shown in FIG. 3A, two piezoelectric vibrators are attached, one of which
vibrates by the stereo left audio signal 2 and the other vibrates by the right audio signal 3. The
use of two piezoelectric vibrators is for stereo reproduction effect and volume effect, but the
number of piezoelectric vibrators may of course be one as shown in FIG. 3B. When there is only
one piezoelectric vibrator, the stereo left audio signal L or the right audio signal R from the audio
signal splitter 2 is amplified by the automatic violin amplifier 3 in FIG. At this time, a monophonic
amplifier can be applied to the automatic violin amplifier 3. The piezoelectric vibrator 1
penetrates the center of a circular bimorph-type piezoelectric ceramic piezoelectric vibration
plate and is fixed to a fixing jig, and the fixing jig is coupled to the vibration transmitter 4. The
vibration transmitter 4 is a very important element for transmitting the vibration of the
piezoelectric vibrator 1 to the block 5.
[0020]
There are four important factors listed below that should be associated with the vibration
transmitter. (1) The material should have good sound and vibration transmission characteristics.
(2) The structure should have good sound and vibration transfer characteristics. (3) The shape
should be such as to firmly hold a piece having a pattern-like opening. (4) Provide an element for
preventing cleavage.
[0021]
With regard to materials with good sound and vibration transfer characteristics, it has been
found that the best results can be obtained by wood, related to the violin being wood. Materials
for musical instruments and bows Various materials, such as hardness and visco-elastic
properties, as well as vibration wave transmission characteristics over a wide frequency band
were examined for various materials, and a plurality of suitable materials were found.
[0022]
FIG. 4 is an explanatory view showing the structure of the vibration transfer body in Example 1,
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FIG. 4A is a side view, FIG. 4B is a plan view, and FIG. 4C is a cross-sectional view in the vibration
transfer body branch part. The vibration transfer body fixes one end to a fixing jig 1 penetrating
the piezoelectric vibrator. The vibration transmission body is fixed to the piece 8 such that the
other end is bifurcated and the tips of the branches 2 and 3 grip the piece 8 from the front and
rear.
[0023]
The vibration transmitter is provided with an opening 4 at the base of both branches in order to
prevent the cleavage of the bases of the branches 2 and 3. The shape of the opening 4 is
cylindrical in FIG. 4A, but may be any shape other than cylindrical as long as the direction of the
cleavage vector due to the stress from the piece 8 is turned and offset.
[0024]
The tips of the branches 2 and 3 are provided with a transverse inner circumference 5 (FIG. 4A)
and a longitudinal inner circumference 7 (FIG. 4C). These structures are effective form elements
for stabilizing the attachment to the piece 8 having a unique shape individually.
[0025]
Further, the outer surfaces 6 of the branches 2 and 3 are concaved in thickness along the
longitudinal direction. This shape is a basic shape required to give the branches 2 and 3 the
bendability necessary for each tip to hold the piece 8 firmly.
[0026]
Since the whole structure of Example 2 of this invention is the same as that of the structure of
Example 1, the description is abbreviate ¦ omitted. The second embodiment differs from the first
embodiment in the piezoelectric vibration / transmission unit shown in FIG. FIG. 5 is an
explanatory view showing a structure of a vibration transfer body of Example 2, FIG. 5A is a side
view, and FIG. 5B is a plan view. The vibration transfer body fixes one end to a fixing jig 1
penetrating the piezoelectric vibrator. The vibration transmission body is fixed to the piece 8
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such that the other end is bifurcated and the tips of the branches 2 and 3 grip the piece 8 from
the front and rear.
[0027]
The vibration transmitter is provided with an opening 4 at the base of both branches in order to
prevent cleavage of the branches 2 and 3. The shape of the opening 4 is cylindrical in FIG. 4A,
but may be any shape other than cylindrical as long as the direction of the cleavage vector due to
the stress from the piece 8 is turned and offset.
[0028]
The tips of the branches 2, 3 are provided with a transverse inner circumference 5 (FIG. 5A) and
a longitudinal inner circumference (not shown). These structures are effective form elements for
stabilizing the attachment to the piece 8 having a unique shape individually.
[0029]
Further, the outer surfaces 6 of the branches 2 and 3 are concaved in thickness along the
longitudinal direction. This shape is a basic shape required to give the branches 2 and 3 the
bendability necessary for each tip to hold the piece 8 firmly.
[0030]
The second embodiment includes the fastener 7. The fastener 7 has a function to prevent
cleavage at the base of the branches 2 and 3 as well as a function to adjust the distance between
the tips of the branches 2 and 3 to an optimum distance for gripping the piece. There is. The
fastener 7 is shown in the shape of a bolt and a nut in FIG. 5, but any other shape can be applied
as long as these two functions can be obtained.
[0031]
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Since the whole structure of Example 3 of this invention is the same as that of the structure of
Example 1, the description is abbreviate ¦ omitted. The third embodiment is different from the
first embodiment in the piezoelectric vibration / transmission unit shown in FIG. FIG. 6 is an
explanatory view showing a structure of a vibration transfer body of Example 3, FIG. 6A is a side
view, and FIG. 6B is a plan view. The vibration transfer body comprises a main shaft 2 and a sub
shaft 3. The main shaft 2 is fixed at one end to a fixing jig 1 penetrating the piezoelectric
vibrator. The countershaft 3 is connected to the main shaft 2 by a spring 5.
[0032]
The main spindle 2 and the countershaft 3 respectively have an inner circumference (not shown)
along the longitudinal direction and an inner circumference 4 along the lateral direction. These
structures are effective form elements to stabilize the attachment to the piece 6 having a unique
shape individually.
[0033]
In the third embodiment, the spring property of the spring 5 is used to keep the normally closed
state (normally closed), and the spindle and the auxiliary shaft are opened when attached to the
piece 6, and the piece is gripped by the force returning to the closed state.
[0034]
Since the whole structure of Example 4 of this invention is the same as that of the structure of
Example 1, the description is abbreviate ¦ omitted.
The fourth embodiment is different from the first embodiment in the piezoelectric vibration /
transmission unit shown in FIG. FIG. 7 is an explanatory view showing a structure of a vibration
transfer body of Example 4, FIG. 7A is a side view, and FIG. 7B is a plan view. The vibration
transfer body comprises a main shaft 2 and a sub shaft 3. The main shaft 2 is fixed at one end to
a fixing jig 1 penetrating the piezoelectric vibrator. The countershaft 3 is connected to the main
shaft 2 by a hinge 4.
[0035]
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The main shaft 2 and the countershaft 3 each have an inner circumference (not shown) along the
longitudinal direction and an inner circumference 7 along the lateral direction. These structures
are effective form elements for stabilizing the attachment to the piece 8 having a unique shape
individually.
[0036]
In the fourth embodiment, the paramagnetic members 5 and 6 are attached to the tip end
portions of the main shaft and the sub shaft with the N pole and the S pole facing each other to
be normally closed (normally closed). The main shaft and the countershaft grip the piece 8 by the
magnetic force that opens the countershaft and returns to the closed state.
[0037]
As mentioned above, although the material of a vibration transmission body was explained as
wood based on the explanation of the present invention example, this is because the emphasis
was placed on the voice vibration transmission characteristics, and it is of course possible to use
the vibration transmission body as a synthetic resin molded article. .
[0038]
Returning to the description of FIG. 1, a stereo amplifier that is generally used can be applied to
the speaker amplifier 4 of FIG.
By changing the amplification factor of the speaker amplifier 4, the volume of the dynamic
speaker 6 is adjusted.
[0039]
According to the invention, it is possible to adjust the volume of the automatic violin 5 by
changing the amplification factor of the automatic violin amplifier 3 of FIG. 1 and adjust the
volume of the dynamic speaker 6 by changing the amplification factor of the speaker amplifier 4.
Now, the listener superimposes a wide-range actual performance voice from the high frequency
band emitted by the automatic violin 5 to the ultrasonic band on the voice of the audible tone
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band reproduced by the dynamic speaker 6, and It became possible to select a preferred
superposition ratio.
As a result, for example, the characteristic defect of the music CD in the high frequency band or
more is significantly improved.
[0040]
By using the same sound source, it is possible to independently adjust the volume of wide-band
sound from the high frequency band to the ultrasonic band by the violin and the volume of the
audible band sound by the dynamic speaker, respectively, to obtain an optimum superimposed
sound. The present invention can be applied to use to realize the reproduction of a highly
realistic music source close to the actual performance.
[0041]
1 Player of audio medium 2 Audio signal branching device 3 Amplifier for automatic violin 4
Amplifier for speaker 5 Automatic violin with piezoelectric vibration / transmission unit mounted
on a piece 6 Dynamic speaker
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