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JP2007049578

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DESCRIPTION JP2007049578
An acoustic piano recording device capable of recording an emitted acoustic sound with excellent
sound quality. A sound recording apparatus 1 of an acoustic piano 2 for recording an acoustic
sound emitted from a sound board 9 of a piano main body 3 when a key 10 is depressed,
wherein an attachment mechanism 11 provided on the piano main body 3 And, while facing the
soundboard 9, it is attached to mutually different predetermined positions of the piano main
body 3 via the attachment mechanism 11, and picks up acoustic sound emitted from the
soundboard 9, and a plurality of musical tone signals A plurality of microphones 31L and 31R for
converting into SL and SR, and a recording device 33 for recording a plurality of musical tone
signals SL and SR are provided. [Selected figure] Figure 2
Acoustic piano recording device
[0001]
The present invention relates to an acoustic piano recording device for recording an acoustic
sound emitted from a grand or upright acoustic piano.
[0002]
As a conventional piano recording device, for example, one disclosed in Patent Document 1 is
known.
The recording device comprises a microphone unit and a microphone having a light source. The
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microphone is disposed in front of the piano at a certain distance from the piano. The
microphone unit has directivity and picks up musical tones in front of it. The light source is
provided below the microphone unit and has a light beam emitting unit. The light beam emitting
unit emits a light beam on the directivity front axis of the microphone unit. According to the
above configuration, the light beam is emitted from the light beam emitting unit to determine the
sound collecting direction that matches the directivity of the microphone while confirming the
front direction of the microphone unit. Thereby, the musical tone emitted from the piano is
picked up in front of the microphone.
[0003]
Although a method of recording musical tones picked up by a microphone is not described in
Patent Document 1, generally, the following method is used. That is, after the musical tone
picked up by the microphone is converted into a musical tone signal, the musical tone signal is
recorded by the recording device, thereby recording the musical tone.
[0004]
As described above, in the above-described conventional recording device, sound collection by
the microphone is performed at a position away from the piano. Therefore, not only the musical
sound directly emitted from the piano (hereinafter referred to as "direct sound") but also the
musical sound reflected from the wall or floor (hereinafter referred to as "reflected sound") is
collected in the microphone. For this reason, when recording musical tones of a piano, the
recording device records not only direct sounds but also reflected sounds, so that musical tones
having a tone quality different from the tones actually emitted from the piano are recorded. Since
the reflected sound is also recorded in this manner, a musical tone is recorded, for example, in a
state where booming occurs. In addition, since the microphone is disposed at a position distant
from the piano body, sounds other than musical tones emitted from the piano are easily
collected, and as a result, noise is easily mixed.
[0005]
The present invention has been made to solve such problems, and it is an object of the present
invention to provide an acoustic piano recording device capable of recording emitted acoustic
sound with excellent sound quality.
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[0006]
Japanese Patent Application Laid-Open No. 11-331977
[0007]
In order to achieve this object, the invention according to claim 1 is an acoustic piano recording
device for recording an acoustic sound emitted from a sound board of a piano body in response
to a key depression of a key. While attached to the provided attachment mechanism and the
soundboard, it is attached to different predetermined positions of the piano body via the
attachment mechanism, and acoustic sounds emitted from the soundboard are collected to obtain
a plurality of musical tones. A plurality of microphones which respectively convert into signals
and a recording device which records a plurality of tone signals are characterized.
[0008]
According to this acoustic piano recording device, a plurality of microphones are attached at
predetermined positions different from one another of the piano main body so as to face the
soundboard via the attachment mechanism.
When an acoustic sound is emitted from the soundboard as the key is depressed, the emitted
acoustic sound is collected by the plurality of microphones and converted into musical tone
signals.
Also, the plurality of tone signals are recorded in a recording device, whereby acoustic sound is
recorded.
As described above, since the microphone is provided to face the soundboard, acoustic sound is
collected so that it includes almost no direct sound emitted directly from the soundboard, but
contains almost no reflected sound from the floor or the like. It can sound. As a result, acoustic
sound can be recorded with excellent sound quality. Further, since the distance between the
microphone and the soundboard is short, it is possible to suppress noise mixing by making it
difficult to pick up sounds other than musical tones.
[0009]
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Furthermore, since a plurality of microphones are arranged at mutually different predetermined
positions, for example, by arranging the microphones at positions corresponding to the bass
range and the treble range, a plurality of acoustic sounds including many bass or treble range
components can be obtained. The microphones can pick up sound respectively. As a result,
acoustic sound can be recorded acoustically in a well-balanced manner as a whole.
[0010]
According to a second aspect of the present invention, in the recording device for an acoustic
piano according to the first aspect, the acoustic piano is a grand piano having a soundboard
arranged horizontally, and a plurality of microphones face the lower surface of the soundboard.
It is characterized in that it is attached.
[0011]
According to this configuration, the plurality of microphones are attached to face the lower
surface of the sound board of the grand piano.
For this reason, for example, even if noise is generated due to the action of the action
accompanied by the key depression of the key, it is possible to suppress the mixing of the noise
due to it into the musical tone signal. Further, since the microphone is disposed on the lower
surface side of the soundboard, the microphone can be attached to the piano main body easily
and inconspicuously from the outside.
[0012]
The invention according to claim 3 is the acoustic piano recording apparatus according to claim
2, further comprising a speaker which is disposed above the soundboard and emits a plurality of
musical tone signals converted by the plurality of microphones as musical tones. It is
characterized by
[0013]
According to this configuration, the acoustic sound picked up by the microphone is emitted from
the speaker disposed above the soundboard.
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For this reason, it is possible to suppress that the musical sound emitted from the speaker wraps
around to the lower side of the soundboard and is collected by the microphone, thereby
suppressing the howling.
[0014]
According to a fourth aspect of the present invention, in the recording device for an acoustic
piano according to the first aspect, the acoustic piano is an upright piano arranged with the
soundboard upright, and a plurality of microphones are provided on the back of the soundboard.
It is characterized by being attached so as to face.
[0015]
According to this configuration, the plurality of microphones are attached to face the back of the
soundboard of the upright piano.
For this reason, as in the invention according to claim 2, for example, it is possible to suppress
that noise caused by the action of the action accompanied by the key depression of the key is
mixed in the musical tone signal. In addition, since the microphone is disposed on the back side
of the soundboard, it can be easily attached to the piano body from the outside.
[0016]
The invention according to claim 5 is the acoustic piano recording apparatus according to claim
4, further comprising a speaker which is disposed in front of the plurality of microphones and
emits a plurality of musical tone signals converted by the plurality of microphones as musical
tones. It is characterized by having.
[0017]
According to this configuration, the acoustic sound collected by the microphone is emitted from
the speaker disposed on the front side of the microphone.
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For this reason, as in the invention according to claim 3, it is possible to suppress that the
musical sound emitted from the speaker is collected by the microphone, and it is possible to
suppress the howling.
[0018]
According to a sixth aspect of the present invention, in the acoustic piano recording device of any
one of the second to fifth aspects, the recording device is disposed outside the piano body, and a
hole is formed in the soundboard, It is characterized in that it further comprises a plurality of
transmission means disposed in the piano body and connected to the plurality of microphones
and the recording device through the hole and transmitting the plurality of musical tone signals
from the plurality of microphones to the recording device.
[0019]
According to this configuration, the musical tone signals converted by the plurality of
microphones are transmitted to the recording device by the plurality of transmission means.
Since the plurality of transmission means are connected to the plurality of microphones and the
recording apparatus through the holes formed in the soundboard, and most of the connection
parts are accommodated in the piano body, the appearance of the acoustic piano can be
improved. It can be kept good.
[0020]
The invention according to claim 7 is characterized in that, in the recording apparatus for an
acoustic piano according to any one of claims 1 to 5, the plurality of microphones are wireless
microphones.
[0021]
According to this configuration, since the plurality of microphones are configured by wireless
microphones, the transmission means according to claim 6 can be omitted.
Therefore, the wireless microphone can be easily disposed not only on the lower surface side or
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the rear surface side of the soundboard but also in the piano body. As a result, the appearance of
the acoustic piano can be kept better.
[0022]
The invention according to claim 8 is characterized in that, in the recording apparatus for an
acoustic piano according to any one of claims 1 to 7, the attaching mechanism is detachably
attached to the piano body.
[0023]
According to this configuration, since the attachment mechanism is detachably attached to the
piano body, at the time of recording, the microphone can be attached to the existing piano by the
attachment mechanism.
Also, when not recording, it is possible to remove the mounting mechanism and the microphone,
thereby keeping the appearance of the acoustic piano better.
[0024]
The invention according to claim 9 is characterized in that, in the recording apparatus for an
acoustic piano according to claim 8, the attachment mechanism is attached to a support of the
piano body.
[0025]
According to this configuration, since the microphone is attached to the support of the piano
body by the attachment mechanism, the microphone faces the bottom of the soundboard in the
case of the grand piano and the back of the soundboard in the case of the upright piano. So easy
to place.
As a result, it is possible to easily obtain the above-described effects of the invention according to
the second or fourth aspect, such as acoustic sound from the soundboard can be picked up with
good sound quality while suppressing the mixing of noise.
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[0026]
According to a tenth aspect of the present invention, in the sound recording apparatus for an
acoustic piano according to the ninth aspect, the attachment mechanism has flexibility, is
provided in an attachment portion formed in a band shape, and the attachment portion, and
supports the microphone. And the mounting portion has a pair of surface fasteners which can be
engaged with each other in a state in which the mounting portion is wound around the support
at predetermined positions different from each other in the length direction. .
[0027]
According to this configuration, the attachment portion can be detachably attached to the post by
winding the attachment portion around the post and engaging the pair of surface fasteners
provided in the attachment portion with each other.
Therefore, the microphone can be easily attached or removed by the attachment mechanism
without damaging the support column. Furthermore, the mounting position of the microphone
can be easily adjusted along the support just by changing the winding position of the mounting
portion.
[0028]
The invention as set forth in claim 11 is characterized in that, in the sound recording apparatus
for an acoustic piano according to claim 10, a pair of surface fasteners which can be engaged
with each other are provided at a predetermined position of the attachment portion and the
support portion. Do.
[0029]
According to this configuration, the support portion and the microphone supported thereby are
detachably attached to the attachment portion by engaging the other surface fastener provided
in the support portion with one of the surface fasteners provided in the attachment portion. Can.
Therefore, the microphone can be easily attached to the support.
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[0030]
According to a twelfth aspect of the present invention, in the recording device for an acoustic
piano as set forth in the tenth or eleventh aspect, the mounting portion is provided with a
vibration-proof material at a portion that contacts the support in a state where the mounting is
wound around the support. It is characterized by
[0031]
When the piano is playing, the vibration of the soundboard is transmitted to a post or the like.
According to this configuration, the vibration damping material is provided at a portion of the
mounting portion in contact with the support column, so that vibration of the soundboard is
transmitted to the microphone via the support column, the mounting portion, and the like by the
vibration damping material. It can be suppressed. Therefore, it is possible to suppress the mixing
of noise resulting from it into the tone signal.
[0032]
According to a thirteenth aspect of the present invention, in the sound piano recording apparatus
of any one of the first to twelfth aspects, the plurality of microphones are disposed for the bass
and treble ranges respectively disposed on the bass side and the treble side of the acoustic piano.
Microphones for the low- and high-frequency ranges are provided with low- and high-range
acoustic members for adjusting the sound quality of the acoustic sound to be collected. It
features.
[0033]
According to this configuration, an acoustic sound including a large amount of bass components
is collected by the low-range microphones disposed on the low-pitch side, and a high-pitch range
is generated by the high-range microphones disposed on the high tone side. Acoustic sound
containing more components is collected.
Since the directivity of the musical tone is higher in the high tone range, the high tone range
component is more likely to be emphasized in the collected acoustic sound. According to the
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present invention, the sound quality of the acoustic sound collected is adjusted for each
microphone by the low-range and high-range acoustic members respectively provided to the lowrange and high-range microphones. Acoustic sound with good sound quality.
[0034]
The invention as set forth in claim 14 is the audio piano recording device according to claim 13,
wherein the low frequency range acoustic member has sound insulation and / or reflectivity and
faces the soundboard with a microphone interposed therebetween. It is characterized in that it is
provided.
[0035]
In low frequency range microphones, the directivity of the acoustic sound to be collected is low,
so when the reflected sound is collected, stagnation or the like is likely to occur.
According to this configuration, when the acoustic sound emitted from the sounding board is
reflected by, for example, a floor, the reflected sound is hard to reach the microphone by sound
insulation and / or reflection by the acoustic member. As a result, the sound collection of the
reflection sound by the microphone can be suppressed, and the sound quality of the acoustic
sound collected by the low range microphone can be improved.
[0036]
The invention according to claim 15 is the recording apparatus for an acoustic piano according
to claim 13, wherein the high-range acoustic member has sound insulation and / or reflection
and faces the soundboard with a microphone interposed therebetween. It is characterized in that
it has a first acoustic member provided as described above, and a second acoustic member
having sound insulation and / or reflectivity and disposed between a high range microphone and
a sound board.
[0037]
The acoustic sound picked up by the high-range microphone has high directivity, so the highrange component is likely to be emphasized.
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According to this configuration, the acoustic sound can be prevented from being directly picked
up by the microphone by sound insulation and / or reflection by the second acoustic member of
the acoustic sound emitted from the sound board, and as a result, The high frequency range
component is not overemphasized in the collected acoustic sound. In addition, since the acoustic
sound collected by the high-range microphone has high directivity, it is possible to obtain a good
sound quality and a flat volume by collecting the acoustic sound after being reflected by the first
acoustic member as described above. You can get balance.
[0038]
The invention according to claim 16 is the audio piano recording apparatus according to any one
of claims 1 to 15, characterized in that the mounting mechanism has adjusting means for
adjusting the distances of the plurality of microphones from the soundboard. Do.
[0039]
In general, the sound quality of the picked up tone depends on the distance of the microphone
from the sound source. For example, the farther away from the sound source, the less the tone or
clearness of the tone, and the closer to the sound source, the higher the high frequency range
component of the tone .
According to this configuration, it is possible to adjust the distances of the plurality of
microphones from the soundboard by the adjusting means. By appropriately adjusting this
distance, acoustic sounds having appropriate intension and clearness are collected by the
respective microphones. can do.
[0040]
According to the invention as set forth in claim 17, in the recording apparatus for an acoustic
piano according to claim 16, the distances of the plurality of microphones from the soundboard
are set to be larger as those arranged on the treble side. It is characterized by
[0041]
The characteristic that the further away from the sound source mentioned above, the less
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noticeable the tone of the musical tone becomes remarkable in the case of the musical tone
containing many low-pitched bass components, and the characteristic that the treble-pitch
component is emphasized the closer to the sound source is It becomes remarkable in the case of
the musical tone which contains many high frequency range components.
According to this configuration, since the distance to the soundboard is set to be larger as the
high-pitched microphones, it is possible to pick up acoustic sound with good sound quality in
each of the microphones.
[0042]
Hereinafter, preferred embodiments of the present invention will be described in detail with
reference to the drawings. 1 and 2 show a grand piano 2 to which a recording device 1 according
to a first embodiment of the present invention is applied. In the following description, when the
grand piano 2 is viewed from the player, the front side is "front", the back side is "rear", and the
left side and the right side are "left" and "right". I will do it.
[0043]
As shown in these figures, the piano body 3 of the grand piano 2 is a post assembly 8 and the
side plate 4 attached to the outer peripheral surface thereof to form the outer shape of the grand
piano 2 and the lower portion of the front of the side plate 4 A shelf board 5 fixed horizontally
between the two, and a sound board 9 attached to the upper surface of the column assembly 8
and the like. The column assembly 8 is constructed by assembling four columns 6 having a
rectangular cross section extending in the front-rear direction, a stack 7 surrounding them, and
the like, and supports a stretched string (not shown). In the front part of the soundboard 9, a hole
9a is formed in the vicinity of the lowest sound side support 6, a hole 9c is formed in the front
side thereof, and a hole 9b is formed in the vicinity of the highest sound side.
[0044]
A plurality of (for example, 88) keys 10 are placed on the shelf board 5. An action (not shown) is
placed at the rear end of the key 10, and a hammer (not shown) is provided for each key 10 on
the upper side of the action.
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[0045]
According to the above configuration, an action is operated along with the depression of the key
10, whereby the hammer vibrates by striking the string, and the vibration of the string is
transmitted to the soundboard 9 and the soundboard 9 The acoustic sound is emitted by
vibrating.
[0046]
On the lowest sound side and the highest sound side posts 6 and 6, a microphone 31L for the
low frequency range and a microphone 31R for the high frequency range are attached via the
attachment mechanisms 11 and 11, respectively.
Further, the microphones 31L and 31R are respectively provided with an acoustic reflection
plate 19L for low frequency range and first and second acoustic reflection plates 20R1 and 20R2
for high frequency range.
[0047]
As shown in FIG. 3, each attachment mechanism 11 includes an attachment portion 13 wound
around the support 6 and a support portion 14 attached to the attachment portion 13. The
mounting portion 13 is a flexible belt-like one made of a synthetic resin, and is constituted by a
pair of first surface fasteners 13a and 13b joined together. The same side surfaces of the first
surface fasteners 13a and 13b are fastener surfaces that can be engaged with each other.
Further, a buckle 16 is attached to an end of the first surface fastener 13 b opposite to the first
surface fastener 13 a via the connecting portion 15. The buckle 16 is made of, for example, a
synthetic resin, and is formed in a rectangular shape having an opening 16a. Moreover, the
vibration-proof material 17 is attached to the surface on the opposite side to the fastener surface
of the 1st surface fastener 13b. The vibration-proof material 17 is made of, for example, an
elastic material such as rubber, has a rectangular shape, and has a length substantially the same
as the length of the support 6 in the vertical direction.
[0048]
With the above configuration, the mounting portion 13 winds around the support 6 while the
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vibration-proof material 17 is pressed against one side of the support 6, passes the first surface
fastener 13a through the opening 16a of the buckle 16, and then turns it back. , And by being
engaged with the first surface fastener 13b, the post 6 is detachably attached.
[0049]
In addition, a second surface fastener 18 a is attached to the fastener surface of the first surface
fastener 13 b at a position corresponding to the vibration-proof material 17.
The length of the second surface fastener 18 a is slightly larger than the length of the vibrationproof material 17.
[0050]
The support portion 14 is formed of a metal plate and, as shown in FIG. 3, is formed in an Lshape from a main body portion 14a and a rising portion 14b which rises perpendicularly from
the main body portion 14a upward. As shown in FIG. 5, a second surface fastener 18 b is
attached to the rising portion 14 b on the surface opposite to the main body portion 14 a
substantially over the front surface. With the above configuration, by engaging the second
surface fastener 18b with the second surface fastener 18a of the attachment portion 13, the
support portion 14 is detachably attached to the attachment portion 13 via the pair of surface
fasteners 18a and 18b. Be
[0051]
As shown in FIGS. 5 and 6, in the main body portion 14a of the attachment mechanism 11 on the
low sound side, the acoustic reflection plate 19L for the low sound range is provided, and in the
main body portion 14a on the high sound side, the first for the high sound range is provided. The
acoustic reflection plate 20R1 and the second acoustic reflection plate 20R2 are respectively
attached.
[0052]
The acoustic reflection plate 19L for the low frequency range is made of a material having a
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sound reflectivity, such as synthetic rubber.
As shown in FIGS. 5 (a) and 6 (a), the acoustic reflection plate 19L is formed in a circular shape,
and is attached to the main body portion 14a of the support portion 14 with one end portion
thereof mounted on the acoustic reflection plate 19L. And the remaining part projects
horizontally from the main body 14a. A hole 19a is formed at the center of the acoustic reflection
plate 19L, and a microphone 31L for the low frequency band is inserted from below and
attached to the hole 19a. Thus, the microphone 31 L is disposed to face the lower surface of the
soundboard 9.
[0053]
As shown in FIGS. 5 (b) and 6 (b), the first acoustic reflector plate 20R1 for the high frequency
range is configured in the same manner as the acoustic reflection plate 19L for the low
frequency range, and similarly to the support portion 14. It is attached. A high frequency range
microphone 31R is inserted from below and attached to the hole 19a of the first acoustic
reflection plate 20R1. Thus, the microphone 31 R is also disposed to face the lower surface of the
soundboard 9.
[0054]
The second acoustic reflection plate 20R2, like the two acoustic reflection plates 19L and 20R1
described above, is reflective, for example, made of synthetic rubber and formed in a circular
shape, and the size thereof is the first acoustic reflection. It is smaller than plate 20R1. Further,
the second acoustic reflection plate 20R2 is attached to the main body portion 14a via the
attachment fitting 21 and the clip 22.
[0055]
The mounting bracket 21 is made of, for example, a bent metal plate. As shown in FIG. 5B, the
mounting bracket 21 extends horizontally from the lower end of the main body 21a extending
obliquely in the vertical direction, the connecting part 21b extending diagonally downward from
the upper end of the main body 21a, and the lower end of the connecting part 21b. It is
comprised by the attaching part 21c. When the second acoustic reflection plate 20R2 is placed
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on the upper surface of the attachment portion 21c, almost half of the second acoustic reflection
plate 20R2 is attached to the second acoustic reflection plate 20R2, and the other half
horizontally protrudes from the attachment portion 21c. A spring-loaded clip 22 made of
synthetic rubber is attached to the lower end of the main body 21a, and the second acoustic
reflection plate 20R2 is attached to the main body 14a by clamping the clip 22 to the main body
14a. It is done. Further, the second acoustic reflection plate 20R2 is disposed concentrically with
the first acoustic reflection plate 20R1, thereby covering the microphone 31R from directly
above.
[0056]
The microphones 31L and 31R are for collecting the acoustic sound emitted from the grand
piano 2 and converting it into analog musical tone signals SL and SR. The microphones 31L and
31R are, for example, wired dynamic microphones, and include an electromagnetic coil and a
diaphragm (both not shown) connected to the electromagnetic coil. Each diaphragm is vibrated
by the acoustic sound emitted from the sound board 9, and an electromotive force proportional
to this vibration is generated in the electromagnetic coil. With the above-described configuration,
the cables 32L and 32R respectively include the musical tone signal SL including a large number
of low range components from the microphone 31L for a low range and the musical tone signal
SR including a large number of high range components from the microphone 31R for a high
range. While being output to the recording device 33 via the (see FIG. 2), it is also output to the
speakers 37L and 37R (see FIG. 7).
[0057]
The cables 32L and 32R connect the microphones 31L and 31R and the recording device 33 to
each other, and transmit musical tone signals SL and SR from the microphones 31L and 31R to
the recording device 33. Most of the cables 32L and 32R are disposed in the piano body 3, and
are connected to the recording device 33 through the holes 9c of the soundboard 9, as shown in
FIG. The cable 32R is connected to the lower end of the low-range microphone 31L through the
hole 9a of the plate 9, and the lower end of the high-range microphone 31R through the hole 9b.
[0058]
The recording device 33 is for recording or reproducing the musical tone signals SL and SR, and
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is attached to the high-tone side of the lower surface of the shelf board 5 as shown in FIG. As
shown in FIG. 7, the recording device 33 is composed of A / D converters 34L and 34R, a CD-R
drive 35 and D / A converters 36L and 36R, and further an operation panel (not shown). Have.
The A / D converters 34L, 34R convert the analog musical tone signals SL, SR from the
microphones 31L, 31R into digital musical tone signals SLD, SRD and output the same to the CDR drive 35. In the recording mode, the CD-R drive 35 records the musical tone signals SLD and
SRD on the CD-R 35a. Thereby, the acoustic sound emitted from the grand piano 2 is recorded.
Further, in the reproduction mode, the tone signals SLD and SRD are read out from the CD-R 35a
and output to the D / A converters 36L and 36R.
[0059]
The D / A converters 36L, 36R convert the digital musical tone signals SLD, SRD from the CD-R
drive 35 into analog musical tone signals SLA, SRA and output the same to the speakers 37L,
37R.
[0060]
The speakers 37L and 37R amplify the musical tone signals SL and SR from the microphones
31L and 31R or the musical tone signals SLA and SRA from the D / A converters 36L and 36R
with a predetermined gain, and then reproduce the musical tone signals. And emit it as a musical
tone.
The speakers 37L and 37R are disposed, for example, on the left and right holding left and right
plates 23L and 23R of the music stand assembly 23 (see FIG. 1).
[0061]
Next, the operation of the recording device 1 configured as described above will be described.
The operation mode of the recording device 1 is roughly divided into a performance mode in
which the musical tones are emitted from the speakers 37L and 37R simultaneously with the
acoustic sound when playing the grand piano 2, and a reproduction mode in which the recorded
acoustic sound is reproduced. Is further divided into a recording mode in which recording is
performed simultaneously with performance and a non-recording mode in which recording is not
performed. The switching of these operation modes is performed by operating the operation
panel.
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[0062]
In the performance mode, an acoustic sound is emitted from the soundboard 9 or the like along
with the performance of the grand piano 2. Of the acoustic sound emitted downward from the
sound board 9, the acoustic sound including many bass components is directly collected by the
low-range microphone 31L, and the reflected sound reflected on the floor is acoustically
reflected. Sound is isolated by the plate 19L to block the sound collection. In addition, as for the
acoustic sound containing a large amount of high frequency range component, a part toward the
first acoustic reflection plate 20R1 is reflected there and then collected by the high frequency
range microphone 31R and traveled to the microphone 31R The other part is shielded by the
second acoustic reflection plate 20R2 and prevented from being directly picked up by the
microphone 31R. Also in the high frequency range microphone 31R, as in the low frequency
range microphone 31L, the reflected sound reflected on the floor or the like is isolated by the
first acoustic reflection plate 20R1.
[0063]
The acoustic sounds picked up by the microphones 31L and 31R are converted into musical tone
signals SL and SR, and then reproduced by the speakers 37L and 37R and emitted as musical
tones. As a result, in addition to the acoustic sound directly emitted from the grand piano 2, it is
possible to play while simultaneously listening to the musical tones emitted from the speakers
37L and 37R.
[0064]
In addition to the above, in the recording mode, the musical tone signals SL and SR from the
microphones 31L and 31R are converted into digital musical tone signals SLD and SRD by the A /
D converters 34L and 34R, and then the CD-R drive is performed. Record the CD-R 35a by 35.
Thereby, an acoustic sound is recorded.
[0065]
Further, in the reproduction mode, the musical tone signals SLD and SRD recorded in the CD-R
35a are read by the CD-R drive 35, converted to analog musical tone signals SLA and SRA by the
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D / A converters 36L and 36R, and then the speaker 37L. , 37R only as a tone.
[0066]
As described above, according to the present embodiment, since the microphones 31L and 31R
are provided to face the lower surface of the soundboard 9, the acoustic sound from the
soundboard 9 hardly contains any reflected sound from the floor or the like. Acoustic sound can
be picked up so that it contains almost only.
As a result, acoustic sound can be recorded with excellent sound quality. Further, since the
distance between the microphones 31L and 31R and the soundboard 9 is short, it is possible to
suppress noise mixing by making it difficult to pick up sounds other than musical tones. Also, just
by adding the recording device 1 to the existing acoustic piano, it is possible to record with
excellent sound quality.
[0067]
Furthermore, since the microphones 31L and 31R are disposed on the lowest sound side and the
highest sound side of the grand piano 2, acoustic sounds including a large amount of low
frequency components or high frequency components can be collected by the microphones 31L
and 31R, respectively. As a result, acoustic sound can be recorded acoustically in a well-balanced
manner as a whole.
[0068]
In addition, since the microphones 31L and 31R are attached to face the lower surface of the
soundboard 2, for example, noise caused by the action of the action accompanied by the key
depression of the key 10 is prevented from being mixed into the musical tone signals SL and SR.
be able to.
Further, since the microphones 31L and 31R are disposed on the lower surface side of the
soundboard 9, the microphones 31L and 31R can be attached to the piano main body 3 easily
and unnoticeably from the outside.
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[0069]
Furthermore, since the microphones 31L and 31R are disposed below the soundboard 9 and the
speakers 37L and 37R are disposed on the left and right holding plates 23L and 23R, the tones
emitted from the speakers 37L and 37R are echoed. It is possible to prevent the sound from
being picked up by the microphones 31L and 31R by turning around below the plate 9, thereby
suppressing howling.
[0070]
Most of the cables 32L and 32R are accommodated in the piano body 3, and connection portions
connected to the microphones 31L and 31R and the recording device 33 through the holes 9a to
9c are the parts of the piano body 3 As it only appears on the outside, the appearance of the
grand piano 2 can be kept good.
[0071]
Furthermore, since the attachment portion 13 of the attachment mechanism 11 is detachably
attached to the support 6, the microphones 31L and 31R can be easily disposed on the lower
surface of the sound board 9 of the existing piano.
As a result, the acoustic sound from the soundboard 9 can be picked up with good sound quality
while suppressing the mixing of noise.
In addition, when not playing, the attachment mechanism 11 and the microphones 31L and 31R
can be removed, whereby the appearance of the grand piano 2 can be kept better.
[0072]
Further, since the mounting portion 13 of the mounting mechanism 11 is configured by the pair
of first surface fasteners 13a and 13b, the microphones 31L and 31R can be easily attached or
removed without damaging the support 6 . Furthermore, the mounting positions of the
microphones 31L and 31R can be easily adjusted along the support 6 simply by changing the
winding positions of the first surface fasteners 13a and 13b.
10-05-2019
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[0073]
Furthermore, the support 14 and the microphones 31L and 31R can be easily attached to the
support 6 simply by engaging the second surface fastener 18b attached to the support 14 with
the second surface fastener 18a attached to the first surface fastener 13a. be able to. Further,
since the second surface fasteners 18a extend in the vertical direction, the distance between the
microphones 31L and 31R from the soundboard 9 can be easily adjusted simply by shifting the
engagement position with the second surface fasteners 18a. As a result, by appropriately
adjusting this distance, acoustic sounds having appropriate intension and clearness can be picked
up by the microphones 31L and 31R.
[0074]
Further, in the mounting portion 13, the vibration-proof material 17 is provided at a portion in
contact with the support 6, so that the vibration of the soundboard 9 is made by the vibrationproof material 17 via the support 6 and the mounting portion 13. Transmission to the
microphones 31L and 31R can be suppressed. Therefore, it is possible to suppress the mixing of
the noise resulting from it into the tone signals SL and SR.
[0075]
Furthermore, since the low frequency sound microphone 31L is provided with the acoustic
reflection plate 19L at its lower end, when the acoustic sound emitted from the soundboard 9 is
reflected on the floor, this reflected sound is an acoustic reflection. The reflection by the plate
19L makes it difficult to reach the microphone 31L. As a result, the sound collection of the
reflection sound by the microphone 31L can be suppressed, and the sound quality of the acoustic
sound collected by the low-range microphone 31L can be improved.
[0076]
In addition, since the first acoustic reflection plate 20R1 is provided at the lower end of the high
sound range microphone 31R and the second acoustic reflection plate 20R2 is provided above,
the acoustic sound emitted from the soundboard 9 is The reflection by the second acoustic
reflection plate 20R2 can prevent acoustic sound from being directly picked up by the
10-05-2019
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microphone 31R. As a result, the high frequency range component is not overemphasized in the
collected acoustic sound. Further, the emitted acoustic sound is reflected by the first acoustic
reflection plate 20R1, and then picked up by the microphone 31R, so that a good sound quality
and a flat volume balance can be obtained.
[0077]
FIG. 8 and FIG. 9 show an upright piano 41 to which the recording device 1 according to the
second embodiment of the present invention is applied. In the following description, the same
components as those in the first embodiment described above are denoted by the same reference
numerals, and detailed description thereof will be omitted. As shown in these figures, the piano
body 42 of the upright piano 41 has left and right parent plates 43, 43, an upper front plate 44
covering a front upper portion between the parent plates 43, 43, and the parent plates 43, 43. A
lower front plate 45 covering the lower half of the front face, a shelf plate 5 horizontally fixed
between the parent plates 43 and 43, a horizontal roof 46 covering the upper surface between
the parent plates 43 and 43, etc. It comprises six pillars 47 extending, a pillar assembly 48
constructed by assembling a hammer (not shown) and the like, a sound board 49 attached to the
front of the pillar assembly 48 and the like.
[0078]
Microphones 31 L and 31 R for low-pitched and high-pitched areas face the back of the
soundboard 49 via the attachment mechanisms 11 and 11 on the second support columns 47
and 47 from the lowest sound side and the highest sound side, respectively. Is attached to Holes
49a and 49b are formed in the vicinity of the microphones 31L and 31R of the sound board 49,
and the cable 32L passes through the hole 49a to the microphone 31L on the low frequency
range side, and the cable 32R passes through the hole 49b to high range The microphones 31R
on the side are connected to each other. Further, a hole (not shown) is formed in the upper end
portion on the high sound side of the lower front plate 45, and the cables 32L and 32R are
connected to the recording device 33 through the hole. Furthermore, on the roof 46, speakers
37L and 37R are disposed at the left and right front portions.
[0079]
Also in the above configuration, during the performance of the upright piano 41, among the
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acoustic sound emitted from the back of the sound board 49, the acoustic sound including many
bass components is directly collected by the microphone 31L for the bass region. The acoustic
sound including many high frequency range components is prevented from being directly picked
up by the high frequency range microphone 31R by the second acoustic reflection plate 20R2
and reflected forward by the first acoustic reflection plate 20R1, Sound is collected by the
microphone 31R. In addition, the reflected sound reflected by the wall or the like is isolated by
the acoustic reflection plate 19L and the first acoustic reflection plate 20R1.
[0080]
As described above, also in this embodiment, since the microphones 31L and 31R are attached to
the support column 47, the microphones 31L and 31R are disposed to face the back of the sound
board 49, and are acoustically contained substantially only acoustic sound from the sound board
49. I can pick up the sound. Further, the tone quality can be adjusted for each of the tones
collected by the microphones 31L and 31R by the low frequency region acoustic reflection plate
19L and the high frequency range first and second acoustic reflection plates 20R1 and 20R2. As
a result, it is possible to obtain the same effect as that of the grand piano 2 of the first
embodiment, such as acoustic sound can be recorded with excellent sound quality. Also, by
disposing the speakers 37L, 37R at the front of the roof 46, that is, in front of the microphones
31L, 31R, it is possible to suppress that the tones emitted from the speakers 37L, 37R are
collected by the microphones 31L, 31R. , Howling can be suppressed.
[0081]
In addition, this invention can be implemented in various aspects, without being limited to the
described embodiment. For example, in the embodiment, the microphones 31L and 31R are
attached to the columns 6 and 47. However, the microphones 31L and 31R may be attached to
other appropriate parts of the piano body 3, for example, the shelf 5 or the side plate 4 or the
like. In that case, the attachment portion 13 of the attachment mechanism 11 may be omitted,
and the second surface fastener 18a may be attached directly to the piano body 3. Further, in the
embodiment, the microphones 31L and 31R use a wired type in which the cables 32L and 32R
are connected, but wireless microphones not requiring the cables 32L and 32R may be used. In
that case, the microphones 31L and 31R can be easily disposed not only on the lower surface
side or the back side of the soundboards 9 and 49 but also in the piano bodies 3 and 42. As a
result, the appearance of the acoustic piano is kept better. be able to.
10-05-2019
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[0082]
Furthermore, in the embodiment, the second acoustic reflection plate 20R2 is provided between
the high-range microphone 31R and the soundboards 9 and 49, but this may be omitted. In that
case, it is sufficient to set the distance of the high frequency range microphones 31R from the
soundboards 9 and 49 to a larger value, thereby collecting acoustic sound with good sound
quality in the respective microphones 31L and 31R. Can.
[0083]
In the embodiment, the recording device 33 records the musical tone signal corresponding to the
acoustic sound as it is, but an acoustic effect may be added to the musical tone signal. Thereby,
the acoustic effect according to preference can be obtained. Furthermore, in the embodiment, at
the time of recording, the CD-R 35a is used as a recording medium, and the digital musical tone
signals SLD and SRD are recorded. However, for example, a magnetic tape may be used as a
recording medium and analog musical tone signals may be recorded. . In addition, it is possible to
change suitably the details within the scope of the meaning of the present invention.
[0084]
FIG. 1 is a perspective view of a recording device according to a first embodiment of the present
invention and a grand piano to which the recording device is applied. It is the bottom view which
abbreviate | omitted a part of grand piano of FIG. FIG. 6 is a side view of a high frequency range
side support, a mounting mechanism, a microphone, and first and second acoustic reflectors. It is
a side view of the attaching part of FIG. It is each side view of the support part for (a) low-pitch
range and (b) high-pitch range of FIG. 1, and an acoustic reflection board. It is each perspective
view of the support part for (a) low-pitch range and (b) high-pitch range of FIG. 5, and an
acoustic reflection board. It is a block diagram which shows a part of recording device of FIG. It is
a perspective view of the sound recording apparatus by 2nd Embodiment of this invention, and
the upright piano to which this is applied. It is a rear view of the upright piano of FIG.
Explanation of sign
[0085]
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DESCRIPTION OF SYMBOLS 1 sound recording apparatus 2 grand piano (acoustic piano) 3 piano
main body 5 key 6 post | mailbox 9 sound board 9a hole 9b hole 9c hole 11 attachment
mechanism 13 attachment part 14 support part 13a 1st surface fastener 13b 1st surface
fastener 17 anti-vibration material 18a Second surface fastener (adjustment means) 18b Second
surface fastener (adjustment means) 19L first acoustic reflection plate (acoustic member) 20R1
first acoustic reflection plate (first acoustic member) 20R2 second acoustic reflection plate
(second acoustic member) ) Microphone for 31 L low frequency range Microphone for 31 R high
frequency range 32 L cable (transmission means) 32 R cable (transmission means) 33 Recording
device 37 L Speaker 37 R Speaker 41 Upright piano (Acoustic piano) 42 Piano body 47 Support
49 Sound board 49a hole 49b hole SL tone signal SR tone signal
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