JP4733463B2 - Acoustic piano recording device - Google Patents

Description

  The present invention relates to a recording apparatus for an acoustic piano that records an acoustic sound emitted from a ground type or upright type acoustic piano.

  As a conventional piano recording apparatus, for example, one disclosed in Patent Document 1 is known. This recording apparatus includes a microphone unit and a microphone having a light source. The microphone is arranged in front of the piano at a certain distance from the piano. The microphone unit has directivity and picks up a musical sound in front of it. The light source is provided below the microphone unit and has a light beam light emitting unit. The light beam emitter emits a light beam on the directional front axis of the microphone unit. With the above configuration, the sound collection direction that matches the directivity of the microphone is determined by confirming the front direction of the microphone unit by emitting the light beam from the light beam emitting unit. Thereby, the musical sound emitted from the piano is collected in front of the microphone.

  Moreover, although the recording method of the musical sound collected by the microphone is not described in Patent Document 1, the following method is generally used. That is, after the musical sound collected by the microphone is converted into a musical sound signal, the musical sound signal is recorded by the recording device, thereby recording the musical sound.

  As described above, in the conventional recording apparatus described above, sound collection by the microphone is performed at a position away from the piano. For this reason, not only the musical sound emitted directly from the piano (hereinafter referred to as “direct sound”) but also the musical sound reflected on the wall or floor (hereinafter referred to as “reflected sound”) is collected by the microphone. For this reason, when recording the musical sound of the piano, the recording device records not only the direct sound but also the reflected sound, and therefore records the musical sound having a sound quality different from the musical sound actually emitted from the piano. By recording the reflected sound in this way, a musical sound is recorded in a state where, for example, there is a cloudiness. Further, since the microphone is arranged at a position away from the piano body, it is easy to pick up sounds other than the musical sound emitted from the piano, and as a result, noise is likely to be mixed.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an acoustic piano recording apparatus capable of recording the emitted acoustic sound with excellent sound quality.

Japanese Patent Laid-Open No. 11-331977

In order to achieve this object, the invention according to claim 1 is an acoustic piano recording apparatus for recording an acoustic sound emitted from a soundboard of a piano main body when a key is pressed. With the mounting mechanism provided and the soundboard facing the soundboard, it is attached to different positions on the piano body via the mounting mechanism, and it collects the acoustic sound emitted from the soundboard and collects multiple musical sounds. The acoustic piano is a grand piano with a horizontally arranged soundboard, and the plurality of microphones are arranged on the lower surface of the soundboard. It is attached so that it may face .

  According to this recording apparatus for an acoustic piano, a plurality of microphones are attached to predetermined positions different from each other on the piano body so as to face the soundboard via an attachment mechanism. When an acoustic sound is emitted from the soundboard as the key is depressed, the emitted acoustic sound is collected by a plurality of microphones and converted into a musical sound signal. The plurality of musical tone signals are recorded in a recording device, thereby recording an acoustic sound. As described above, since the microphone is provided so as to face the soundboard, the acoustic sound is collected so that it hardly includes the reflected sound from the floor and includes almost only the direct sound emitted directly from the soundboard. Can sound. As a result, acoustic sound can be recorded with excellent sound quality. In addition, since the distance between the microphone and the soundboard is short, it is difficult for sounds other than musical sounds to be collected, so that mixing of noise can be suppressed.

  Furthermore, since the plurality of microphones are arranged at different predetermined positions, for example, by arranging the microphones at positions corresponding to the low frequency range and the high frequency range, an acoustic sound containing a lot of low frequency components or high frequency components can be Each microphone can pick up sound. As a result, the acoustic sound can be recorded in an acoustically well-balanced manner as a whole.

A plurality of microphones are attached so as to face the lower surface of the soundboard of the grand piano. For this reason, for example, even if noise occurs due to the action of the action associated with pressing the key, it is possible to suppress the resulting noise from being mixed into the musical tone signal. Further, since the microphone is disposed on the lower surface side of the soundboard, the microphone can be easily attached to the piano body from the outside so as not to be noticeable.

According to a second aspect of the present invention, in the acoustic piano recording apparatus according to the first aspect of the present invention, the acoustic piano recording apparatus further includes a speaker that is disposed above the soundboard and emits a plurality of musical sound signals converted by a plurality of microphones as musical sounds. It is characterized by that.

  According to this configuration, the acoustic sound picked up by the microphone is emitted from the speaker disposed above the soundboard. For this reason, it can suppress that the musical sound emitted from the speaker wraps around to the lower side of a sound board, and is picked up with a microphone, and, thereby, howling can be suppressed.

According to a third aspect of the present invention , there is provided an acoustic piano recording apparatus for recording an acoustic sound emitted from a soundboard of a piano body when a key is depressed, and an attachment mechanism provided in the piano body, A plurality of microphones that are attached to different predetermined positions of the piano body via an attachment mechanism while facing the board, and that collects acoustic sounds emitted from the soundboard and converts them into a plurality of musical sound signals, respectively. And a recording device for recording a plurality of musical sound signals, and the acoustic piano is an upright piano arranged with the soundboard upright, and the plurality of microphones are attached so as to face the back of the soundboard. It is characterized by.

According to this configuration, the plurality of microphones are attached so as to face the back surface of the soundboard of the upright piano. For this reason, it can suppress that the noise resulting from the action | operation action | action accompanying key depression, for example is mixed with a musical tone signal similarly to the invention which concerns on Claim 1 . Moreover, since the microphone is disposed on the back side of the soundboard, it can be easily attached to the piano body from the outside.

According to a fourth aspect of the present invention, in the acoustic piano recording apparatus according to the third aspect of the present invention, there is further provided a speaker that is arranged in front of the plurality of microphones and emits a plurality of musical sound signals converted by the plurality of microphones as musical sounds. It is characterized by providing.

According to this configuration, the acoustic sound collected by the microphone is emitted from the speaker arranged on the front side of the microphone. For this reason, like the invention concerning Claim 2, it can suppress that the musical sound emitted from the speaker is picked up with a microphone, and can suppress howling.

The invention according to claim 5 is the acoustic piano recording apparatus according to any one of claims 1 to 4 , wherein the recording apparatus is disposed outside the piano body, and the soundboard has a hole formed therein. The apparatus further includes a plurality of transmission means arranged in the piano main body, connected to a plurality of microphones and a recording device through a hole, and transmitting a plurality of musical sound signals from the plurality of microphones to the recording device.

  According to this configuration, the musical sound signals converted by the plurality of microphones are transmitted to the recording apparatus by the plurality of transmission means. The plurality of transmission means are connected to a plurality of microphones and a recording device through holes formed in the soundboard, and most of them except for the connection portion are accommodated in the piano body, so that the appearance of the acoustic piano is improved. Can keep good.

The invention according to claim 6 is the acoustic piano recording apparatus according to any one of claims 1 to 4 , wherein the plurality of microphones are wireless microphones.

According to this configuration, since the plurality of microphones are constituted by wireless microphones, the transmission means according to claim 5 can be omitted. For this reason, the wireless microphone can be easily arranged not only on the lower surface side or 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.

The invention according to claim 7 is the acoustic piano recording apparatus according to any one of claims 1 to 6 , wherein the attachment mechanism is detachably attached to the piano body.

  According to this configuration, since the attachment mechanism is detachably attached to the piano body, the microphone can be attached to the existing piano by the attachment mechanism during recording. Further, when recording is not performed, it is possible to remove the attachment mechanism and the microphone, so that the appearance of the acoustic piano can be further improved.

The invention according to claim 8 is the acoustic piano recording apparatus according to claim 7 , wherein the attachment mechanism is attached to a column of the piano body.

According to this configuration, since the microphone is attached to the column of the piano body by the attachment mechanism, the microphone faces the lower surface of the soundboard in the case of a grand piano and faces the rear surface of the soundboard in the case of an upright piano. Can be easily arranged. As a result, it is possible to easily obtain the above-described effects of the invention according to claim 1 or 3 such that the acoustic sound from the soundboard can be picked up with good sound quality while suppressing the mixing of noise.

The invention according to claim 9 is the acoustic piano recording apparatus according to claim 8 , wherein the attachment mechanism has flexibility, is provided in a belt-like attachment portion, and is provided in the attachment portion to support the microphone. And a mounting portion having a pair of hook-and-loop fasteners that can be engaged with each other in a state where the mounting portion is wound around the support column at predetermined positions different from each other in the length direction. .

  According to this configuration, the attachment portion can be detachably attached to the support column by winding the attachment portion around the support column and engaging the pair of hook-and-loop fasteners provided on the attachment unit with each other. For this reason, the attachment or removal of the microphone by the attachment mechanism can be easily performed without damaging the support column. Furthermore, the microphone mounting position can be easily adjusted along the column only by changing the winding position of the mounting portion.

According to a tenth aspect of the present invention, in the acoustic piano recording apparatus according to the ninth aspect, a pair of hook-and-loop fasteners that can be engaged with each other are provided at a predetermined position of the mounting portion and the support portion. To do.

  According to this configuration, by engaging the other surface fastener provided in the support portion with one of the surface fasteners provided in the attachment portion, the support portion and the microphone supported by the surface fastener are detachably attached to the attachment portion. Can do. For this reason, a microphone can be easily attached to a support | pillar.

According to an eleventh aspect of the present invention, in the acoustic piano recording apparatus according to the ninth or tenth aspect of the present invention, the attachment portion is provided with a vibration-proof material at a portion that contacts the support column in a state where the attachment portion is wound around the support column. It is characterized by being.

  When the piano is played, the vibration of the soundboard is transmitted to the column. According to this configuration, since the vibration isolating material is provided at the portion of the attachment portion that contacts the support column, the vibration isolation material transmits the vibration of the soundboard to the microphone through the support column and the attachment portion. Can be suppressed. Therefore, it is possible to suppress the mixing of noise into the musical tone signal due to it.

The invention according to claim 12 is the recording apparatus for an acoustic piano according to any one of claims 1 to 11 , wherein the plurality of microphones are arranged for the low frequency range and the high frequency range respectively disposed on the low frequency side and the high frequency side of the acoustic piano. The microphone for the low range and the microphone for the high range are provided with acoustic members for the low range and the high range, respectively, for adjusting the sound quality of the collected acoustic sound. Features.

  According to this configuration, the low frequency range microphone arranged on the low frequency side collects an acoustic sound containing more low frequency components, and the high frequency range microphone arranged on the high frequency side has a high frequency range. An acoustic sound containing more components is collected. Since the directivity of the musical sound is higher in the high sound region, the high sound region component is more emphasized in the collected acoustic sound. According to the present invention, the sound quality of the acoustic sound collected is adjusted for each microphone by the low-frequency and high-frequency acoustic members provided in the low-frequency and high-frequency microphones, respectively. Can collect acoustic sound with good sound quality.

According to a thirteenth aspect of the present invention, in the acoustic piano recording apparatus according to the twelfth aspect , the acoustic member for the low frequency range has a sound insulating property and / or a reflective property, and faces the soundboard with a microphone in between. It is provided as follows.

  In the microphone for low sound range, the directivity of the acoustic sound to be picked up is low. Therefore, when the reflected sound is picked up, it is easy to generate a hump. According to this configuration, when the acoustic sound emitted from the soundboard is reflected by, for example, the floor, the reflected sound is sound-insulated and / or reflected by the acoustic member, so that it is difficult to reach the microphone. As a result, the collection of the reflected sound by the microphone can be suppressed, and the sound quality of the acoustic sound collected by the low-frequency microphone can be improved.

According to a fourteenth aspect of the present invention, in the acoustic piano recording apparatus according to the twelfth aspect , the high frequency range acoustic member has sound insulation and / or reflection, and faces the soundboard with a microphone in between. And a second acoustic member that has sound insulation and / or reflectivity and is disposed between a high-frequency microphone and a soundboard.

  Since the acoustic sound picked up by the microphone for the high frequency range has high directivity, the high frequency range component is easily emphasized. According to this configuration, it is possible to prevent the acoustic sound from being directly picked up by the microphone by insulating and / or reflecting the acoustic sound emitted from the soundboard by the second acoustic member. The high frequency range component is not excessively emphasized in the collected acoustic sound. In addition, since the acoustic sound collected by the microphone for high sound range has high directivity, by collecting the acoustic sound after being reflected by the first acoustic member in this way, good sound quality and flat sound volume are obtained. You can get a balance.

The invention according to claim 15 is the acoustic piano recording apparatus according to any one of claims 1 to 14 , wherein the mounting mechanism has an adjusting means for adjusting the distances of the plurality of microphones from the soundboard. To do.

  In general, the quality of the tone that is collected depends on the distance of the microphone from the sound source.For example, the farther away from the sound source, the less the sharpness and clearness of the tone, and the closer to the sound source, the higher the high frequency components of the tone. . According to this configuration, since the distances of the plurality of microphones from the soundboard can be adjusted by the adjusting means, by appropriately adjusting this distance, an acoustic sound having an appropriate sharpening and clearness can be collected by each microphone. can do.

According to a sixteenth aspect of the present invention, in the acoustic piano recording apparatus according to the fifteenth aspect , the distance between the plurality of microphones from the soundboard is set to be greater as the distance from the soundboard is higher. It is characterized by that.

  The above-mentioned characteristic that the farther away from the sound source, the less the tone of the musical tone becomes, becomes more prominent in the case of a musical sound that contains a lot of low-frequency components with low directivity, and the characteristic that the high-frequency component is emphasized the closer to the sound source, This is especially noticeable for musical tones that contain many high-frequency components. According to this configuration, the higher the sound side microphone, the larger the distance from the soundboard, so that it is possible to collect an acoustic sound with good sound quality in each microphone.

  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 apparatus 1 according to a first embodiment of the present invention is applied. In the following description, the front side when the grand piano 2 is viewed from the performer will be described as “front”, the back side as “rear”, and the left and right sides as “left” and “right”. Do the original.

As shown in these drawings, the piano body 3 of the grand piano 2 includes a column assembly 8, a side plate 4 that is attached to the outer peripheral surface thereof and forms the outer shape of the grand piano 2, and a lower portion of the front portion of the side plate 4. A shelf board 5 that is horizontally fixed in between and a sound board 9 attached to the upper surface of the column assembly 8 are provided. The strut assembly 8 is configured by assembling four struts 6 having a square cross section extending in the front-rear direction and a pile 7 surrounding them, and supports a string (not shown) that is stretched. The front portion of the sound board 9, the highest sound side of the column 6 near the hole 9a is a hole 9c at its front side, the hole 9b in the vicinity of the column 6 of the top bass side is formed.

  A plurality of (for example, 88) keys 10 are placed on the shelf board 5. An action (not shown) is placed on 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.

  According to the above configuration, the action is actuated when the key 10 is pressed, whereby the hammer vibrates by striking the string, and the vibration of the string is transmitted to the soundboard 9. The acoustic sound is emitted by vibrating.

  A microphone 31L for a low sound range and a microphone 31R for a high sound range are attached to the lowest and highest sound struts 6 and 6 via attachment mechanisms 11 and 11, respectively. The microphones 31L and 31R are respectively provided with an acoustic reflector 19L for low sound range and first and second acoustic reflectors 20R1 and 20R2 for high sound range.

  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 attachment portion 13 is a flexible belt-shaped member made of synthetic resin, and is composed of a pair of first surface fasteners 13a and 13b joined together. The surfaces on the same side 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 the end of the first surface fastener 13b opposite to the first surface fastener 13a via a connecting portion 15. The buckle 16 is made of, for example, a synthetic resin and is formed in a square shape having an opening 16a. A vibration isolator 17 is attached to the surface of the first surface fastener 13b opposite to the fastener surface. The vibration isolator 17 is made of an elastic material such as rubber, is formed in a rectangular shape, and has substantially the same length as the vertical length of the column 6.

  With the above configuration, the attachment portion 13 is wound around the support 6 with the vibration isolator 17 pressed against one side of the support 6, passes the first surface fastener 13 a through the opening 16 a of the buckle 16, and then turns it back. By attaching to the 1st surface fastener 13b, it attaches to the support | pillar 6 removably.

  A second surface fastener 18a is attached to the fastener surface of the first surface fastener 13b at a position corresponding to the vibration isolator 17. The length of the second surface fastener 18 a is slightly larger than the length of the vibration isolator 17.

  The support part 14 is comprised with the metal plate, and as shown in FIG. 3, it is formed in the L-shape from the main-body part 14a and the standing part 14b which stands | starts up at right angle from the main-body part 14a. As shown in FIG. 5, the second surface fastener 18 b is attached to the rising portion 14 b on the surface opposite to the main body portion 14 a over the almost front surface. With the above configuration, the support portion 14 is detachably attached to the attachment portion 13 via the pair of surface fasteners 18a and 18b by engaging the second surface fastener 18b with the second surface fastener 18a of the attachment portion 13. It is done.

  As shown in FIGS. 5 and 6, the low-frequency acoustic reflector 19 </ b> L is provided in the main body portion 14 a of the bass-side attachment mechanism 11, and the high-frequency bass first portion is provided in the high-frequency side main body portion 14 a. The acoustic reflector 20R1 and the second acoustic reflector 20R2 are respectively attached.

  The acoustic reflection plate 19L for the low sound range is made of a material having sound reflectivity, such as synthetic rubber. As shown in FIGS. 5 (a) and 6 (a), the acoustic reflector 19L is formed in a circular shape, and one end of the acoustic reflector 19L is mounted on the main body 14a of the support portion 14 so as to be attached thereto. The remaining portion protrudes horizontally from the main body portion 14a. A hole 19a is formed at the center of the acoustic reflector 19L, and a microphone 31L for low sound range is inserted into the hole 19a from below and attached. Thereby, the microphone 31 </ b> L is disposed so as to face the lower surface of the soundboard 9.

  As shown in FIG. 5B and FIG. 6B, the first sound reflector 20R1 for the high sound range is configured in the same manner as the sound reflector 19L for the low sound range, and similarly to the support portion 14. It is attached. A microphone 31R for high sound range is inserted and attached to the hole 19a of the first acoustic reflector 20R1 from below. Thereby, the microphone 31 </ b> R is also arranged so as to face the lower surface of the soundboard 9.

  Similar to the two acoustic reflectors 19L and 20R1 described above, the second acoustic reflector 20R2 is made of, for example, synthetic rubber having a reflectivity and is formed in a circular shape, and the size thereof is the first acoustic reflector. It is smaller than the plate 20R1. Further, the second acoustic reflector 20R2 is attached to the main body portion 14a via the attachment fitting 21 and the clip 22.

  The mounting bracket 21 is made of, for example, a bent metal plate. As shown in FIG. 5 (b), the mounting bracket 21 extends horizontally from a main body portion 21a extending obliquely in the vertical direction, a connecting portion 21b extending obliquely downward from the upper end of the main body portion 21a, and a lower end of the connecting portion 21b. It is comprised by the attaching part 21c. The second acoustic reflector 20R2 is mounted on the upper surface of the mounting portion 21c, and almost half of the second acoustic reflecting plate 20R2 projects horizontally from the mounting portion 21c. A clip 22 with a spring made of synthetic rubber is attached to the lower end portion of the main body portion 21a, and the second acoustic reflector 20R2 is attached to the main body portion 14a by sandwiching the clip 22 with the main body portion 14a. It has been. The second acoustic reflector 20R2 is arranged concentrically with the first acoustic reflector 20R1, and thereby covers the microphone 31R from directly above.

  The microphones 31L and 31R collect the acoustic sound emitted from the grand piano 2 and convert it into analog musical sound signals SL and SR. The microphones 31L and 31R are composed of, for example, wired dynamic microphones, and include an electromagnetic coil and a diaphragm (both not shown) connected to the electromagnetic coil. Each diaphragm vibrates due to the acoustic sound emitted from the soundboard 9, and an electromotive force proportional to the vibration is generated in the electromagnetic coil. With the above-described configuration, the musical sound signal SL including a lot of low-frequency components is output from the low-frequency microphone 31L, and the musical sound signal SR including a high-frequency component is respectively transmitted from the high-frequency microphone 31R to the cables 32L and 32R. (See FIG. 2), and is also outputted to the speakers 37L and 37R (see FIG. 7).

The cables 32L and 32R are for connecting the microphones 31L and 31R and the recording device 33 to each other and transmitting the musical sound signals SL and SR from the microphones 31L and 31R to the recording device 33. Most of the cables 32L and 32R are arranged in the piano body 3, and as shown in FIG. 2, the cables 32L and 32R are connected to the recording device 33 through the holes 9c of the soundboard 9, and the cables 32L are through the holes 9 b of the plate 9 to the lower end of the microphone 31L for low range, cable 32R passes through the hole 9 a to the lower end of the microphone 31R for high range, are connected.

  The recording device 33 is for recording or reproducing the musical sound signals SL and SR, and is attached to the high sound side of the lower surface of the shelf board 5 as shown in FIG. As shown in FIG. 7, the recording device 33 includes A / D converters 34L and 34R, a CD-R drive 35, and D / A converters 36L and 36R, and an operation panel (not shown). I have. The A / D converters 34L and 34R convert the analog tone signals SL and SR from the microphones 31L and 31R into digital tone signals SLD and SRD and output them to the CD-R drive 35. In the recording mode, the CD-R drive 35 records the musical sound signals SLD and SRD on the CD-R 35a. Thereby, the acoustic sound emitted from the grand piano 2 is recorded. In the reproduction mode, the musical sound signals SLD and SRD are read from the CD-R 35a and output to the D / A converters 36L and 36R.

  The D / A converters 36L and 36R convert the digital tone signals SLD and SRD from the CD-R drive 35 into analog tone signals SLA and SRA, and output them to the speakers 37L and 37R.

  The speakers 37L and 37R amplify the music signals SL and SR from the microphones 31L and 31R or the music signals SLA and SRA from the D / A converters 36L and 36R with a predetermined gain, and then reproduce the music signals. And release it as a musical sound. The speakers 37L and 37R are disposed on the left and right holding left and right plates 23L and 23R of the music stand assembly 23, for example (see FIG. 1).

  Next, the operation of the recording apparatus 1 having the above configuration will be described. The operation mode of the recording device 1 is roughly divided into a performance mode in which a musical sound is emitted from the speakers 37L and 37R simultaneously with the acoustic sound when the grand piano 2 is played, and a playback 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. These operation modes are switched by operating the operation panel.

  In the performance mode, an acoustic sound is emitted from the soundboard 9 or the like as the grand piano 2 is played. Among acoustic sounds emitted downward from the soundboard 9, an acoustic sound containing a lot of low-frequency components is directly picked up by the low-frequency microphone 31 </ b> L, and the reflected sound reflected from the floor or the like is reflected acoustically. Sound is blocked by the plate 19L and the sound collection is blocked. In addition, the acoustic sound including a lot of high-frequency components is partly directed toward the first acoustic reflector 20R1, reflected there, and then picked up by the high-frequency microphone 31R, toward the microphone 31R. The other part is sound-insulated by the second acoustic reflector 20R2 and is prevented from being directly picked up by the microphone 31R. Also in the high-frequency microphone 31R, the reflected sound reflected from the floor or the like is blocked by the first acoustic reflector 20R1, as in the low-frequency microphone 31L.

  The acoustic sounds collected by the microphones 31L and 31R are converted into musical sound signals SL and SR, then reproduced by the speakers 37L and 37R, and emitted as musical sounds. Thereby, in addition to the acoustic sound emitted directly from the grand piano 2, it is possible to perform while simultaneously listening to the musical sounds emitted from the speakers 37L and 37R.

  In addition to the above, in the recording mode, the tone signals SL and SR from the microphones 31L and 31R are converted into digital tone signals SLD and SRD by the A / D converters 34L and 34R, and then the CD-R drive. 35 to the CD-R 35a. Thereby, an acoustic sound is recorded.

  In the reproduction mode, the musical sound signals SLD and SRD recorded on the CD-R 35a are read by the CD-R drive 35, converted into analog musical sound signals SLA and SRA by the D / A converters 36L and 36R, and then the speaker 37L. , 37R is emitted as a musical tone only.

  As described above, according to the present embodiment, since the microphones 31L and 31R are provided so as to face the lower surface of the soundboard 9, the acoustic sound from the soundboard 9 is hardly included and hardly includes the reflected sound from the floor or the like. The acoustic sound can be collected so as to include almost only. As a result, acoustic sound can be recorded with excellent sound quality. In addition, since the distance between the microphones 31L and 31R and the soundboard 9 is short, it is difficult to collect sounds other than musical sounds, so that mixing of noise can be suppressed. Moreover, it is possible to record with excellent sound quality simply by adding the recording device 1 to an existing acoustic piano.

  Furthermore, since the microphones 31L and 31R are arranged on the lowest sound side and the highest sound side of the grand piano 2, it is possible to collect acoustic sounds including a lot of low-frequency components or high-frequency components with the microphones 31L and 31R, respectively. As a result, the acoustic sound can be recorded in an acoustically well-balanced manner as a whole.

  Further, since the microphones 31L and 31R are attached so as to face the lower surface of the soundboard 2, for example, noise caused by action action accompanying the key depression of the key 10 is prevented from being mixed into the musical sound signals SL and SR. be able to. Moreover, since the microphones 31L and 31R are arranged on the lower surface side of the soundboard 9, the microphones 31L and 31R can be easily attached to the piano body 3 from the outside so as not to be noticeable.

  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 plates 23L and 23R, the musical sounds emitted from the speakers 37L and 37R are echoed. It is possible to suppress the sound from being picked up by the microphones 31L and 31R by going around to the lower side of the plate 9, thereby suppressing howling.

  Further, most of the cables 32L and 32R are accommodated in the piano body 3, and the connecting portions connected to the microphones 31L and 31R and the recording device 33 through the holes 9a to 9c are connected to the piano body 3. Since it only appears outside, the appearance of the grand piano 2 can be kept good.

  Furthermore, since the attachment portion 13 of the attachment mechanism 11 is detachably attached to the column 6, the microphones 31L and 31R can be easily disposed on the lower surface of the soundboard 9 of an existing piano. As a result, it is possible to collect the acoustic sound from the soundboard 9 with good sound quality while suppressing the mixing of noise. Further, when the performance is not performed, the attachment mechanism 11 and the microphones 31L and 31R can be removed, whereby the appearance of the grand piano 2 can be further improved.

  Moreover, since the attachment part 13 of the attachment mechanism 11 is comprised by a pair of 1st surface fastener 13a, 13b, attachment or removal of the microphones 31L and 31R can be performed easily, without scratching the support | pillar 6. . Furthermore, the attachment positions of the microphones 31L and 31R can be easily adjusted along the support column 6 only by changing the winding positions of the first surface fasteners 13a and 13b.

  Furthermore, the support part 14 and the microphones 31L and 31R can be easily attached to the column 6 simply by engaging the second surface fastener 18b attached to the support part 14 with the second surface fastener 18a attached to the first surface fastener 13a. be able to. Moreover, since the 2nd surface fastener 18a is extended in the up-down direction, the distance of the microphones 31L and 31R from the sound board 9 can be easily adjusted only by shifting an engagement position with it. As a result, by appropriately adjusting this distance, it is possible to pick up the acoustic sound having an appropriate depth and clearness with the microphones 31L and 31R.

  Moreover, since the vibration isolator 17 is provided in the site | part which contacts the support | pillar 6 in the attachment part 13, the vibration of the soundboard 9 is vibrated through the support | pillar 6, the attachment part 13, etc. by this anti-vibration material 17. Transmission to the microphones 31L and 31R can be suppressed. Therefore, it is possible to suppress the noise resulting from the mixing into the musical tone signals SL and SR.

  Further, since the acoustic reflector 19L is provided at the lower end of the low frequency range microphone 31L, when the acoustic sound emitted from the soundboard 9 is reflected by the floor, the reflected sound is reflected by the acoustic reflection. Reflecting on the plate 19L makes it difficult to reach the microphone 31L. As a result, the collection of the reflected sound by the microphone 31L can be suppressed, and the sound quality of the acoustic sound collected by the low-frequency microphone 31L can be improved.

  In addition, since the first acoustic reflector 20R1 is provided at the lower end of the microphone 31R for the high frequency range and the second acoustic reflector 20R2 is provided above the microphone 31R, the acoustic sound emitted from the soundboard 9 can be obtained. By reflecting with the second acoustic reflector 20R2, it is possible to prevent the acoustic sound from being directly picked up by the microphone 31R. As a result, the high frequency range component is not excessively emphasized in the collected acoustic sound. Moreover, after the emitted acoustic sound is reflected by the first acoustic reflector 20R1, and then picked up by the microphone 31R, a good sound quality and a flat sound volume balance can be obtained.

  8 and 9 show an upright piano 41 to which the recording apparatus 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 is omitted. As shown in these drawings, the piano main body 42 of the upright piano 41 includes left and right parent plates 43, 43, an upper front plate 44 that covers the upper front surface between the parent plates 43, 43, and between the parent plates 43, 43. A lower front plate 45 covering the lower half of the front surface, a shelf plate 5 fixed horizontally between the parent plates 43, 43, a horizontal roof 46 covering the upper surface such as between the parent plates 43, 43, and the vertical direction It has six struts 47 that extend, a strut assembly 48 that is constructed by assembling a strut (not shown), and a soundboard 49 that is attached to the front surface of the strut assembly 48.

  Microphones 31L and 31R for the low and high sound ranges face the back surface of the soundboard 49 through the attachment mechanisms 11 and 11 on the second support columns 47 and 47 respectively from the lowest sound side and the highest sound side. Is attached. Holes 49a and 49b are formed in the vicinity of the microphones 31L and 31R of the sound board 49. 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 and enters the high sound range. Is connected to the microphone 31R on the side. Further, a hole (not shown) is formed in the upper end portion of the lower front plate 45 on the high sound side, and the cables 32L and 32R are connected to the recording device 33 through the hole. Furthermore, speakers 37 </ b> L and 37 </ b> R are disposed on the left and right front portions of the roof 46.

  Even in the above configuration, during the performance of the upright piano 41, the acoustic sound including many low frequency components out of the acoustic sound emitted from the back of the soundboard 49 is directly collected by the low frequency range microphone 31L. The acoustic sound containing a lot of high-frequency components is prevented from being directly collected by the high-frequency microphone 31R by the second acoustic reflector 20R2 and reflected forward by the first acoustic reflector 20R1. Sound is picked up by the microphone 31R. Further, the reflected sound reflected by the wall or the like is blocked by the acoustic reflector 19L and the first acoustic reflector 20R1.

  As described above, also in the present embodiment, since the microphones 31L and 31R are attached to the support column 47, the microphones 31L and 31R are arranged so as to face the back of the soundboard 49, and the acoustic sound is almost included only in the acoustic sound from the soundboard 49. Sound can be picked up. Further, the sound quality can be adjusted for each musical sound collected by the microphones 31L and 31R by the acoustic reflector 19L for the low sound region and the first and second acoustic reflectors 20R1 and 20R2 for the high sound region. As a result, it is possible to obtain the same effects as in the case of the grand piano 2 of the first embodiment, such as recording an acoustic sound with excellent sound quality. Further, by arranging the speakers 37L and 37R in front of the roof 46, that is, in front of the microphones 31L and 31R, it is possible to suppress the musical sounds emitted from the speakers 37L and 37R from being collected by the microphones 31L and 31R. , Howling can be suppressed.

  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 support columns 6 and 47, but may be attached to other appropriate parts of the piano body 3, such as the shelf board 5 and the side board 4. 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. In the embodiment, as the microphones 31L and 31R, wired types connected to the cables 32L and 32R are used, but wireless microphones that do not require the cables 32L and 32R may be used. In that case, the microphones 31L and 31R can be easily arranged not only on the lower surface side or the rear surface side of the soundboards 9 and 49 but also in the piano main bodies 3 and 42, and as a result, the appearance of the acoustic piano can be further improved. be able to.

  Furthermore, in the embodiment, the second acoustic reflector 20R2 is provided between the high-frequency microphone 31R and the soundboards 9 and 49, but this may be omitted. In that case, the distance of the microphone 31R for the high sound range from the soundboards 9 and 49 may be set to be larger, so that the acoustic sounds having good sound quality are collected by the respective microphones 31L and 31R. Can do.

  In the embodiment, the recording device 33 records the musical sound signal corresponding to the acoustic sound as it is, but an acoustic effect may be added to the musical sound signal. Thereby, the acoustic effect according to liking can be acquired. Furthermore, in the embodiment, at the time of recording, the CD-R 35a is used as a recording medium and digital musical tone signals SLD and SRD are recorded. However, for example, a magnetic tape or the like may be used as a recording medium to record analog musical tone signals. . In addition, it is possible to appropriately change details within the scope of the present invention.

1 is a perspective view of a recording apparatus according to a first embodiment of the present invention and a grand piano to which the recording apparatus is applied. It is the bottom view which abbreviate | omitted a part of grand piano of FIG. It is a side view of the support, mounting mechanism, microphone, and first and second acoustic reflectors on the high sound range side. It is a side view of the attaching part of FIG. It is each side view of the support part and acoustic reflection board for (a) low sound range of FIG. 1, and (b) high sound range. It is each perspective view of the support part and acoustic reflection board for (a) low-frequency range of FIG. 5, and (b) high-frequency range. It is a block diagram which shows a part of recording apparatus of FIG. It is a perspective view of the recording device 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 symbols

1 Recording device 2 Grand piano (acoustic piano)
DESCRIPTION OF SYMBOLS 3 Piano main body 5 Key 6 Prop 9 Sound board 9a Hole 9b Hole 9c Hole 11 Attachment mechanism 13 Attachment part 14 Support part 13a First surface fastener 13b First surface fastener 17 Vibration isolator 18a Second surface fastener (adjustment means)
18b Second surface fastener (adjustment means)
19L first acoustic reflector (acoustic member)
20R1 first acoustic reflector (first acoustic member)
20R2 second acoustic reflector (second acoustic member)
31L Microphone for low range 31R Microphone for high range 32L Cable (Transmission means)
32R cable (transmission means)
33 Recording Device 37L Speaker 37R Speaker 41 Upright Piano (Acoustic Piano)
42 Piano body 47 Prop 49 Sound board 49a Hole 49b Hole SL Music signal SR Music signal

Claims (16)

An acoustic piano recording device that records an acoustic sound emitted from a soundboard of a piano body when a key is pressed,
An attachment mechanism provided in the piano body;
While facing the soundboard, it is attached to different predetermined positions of the piano body through the attachment mechanism, and the acoustic sound emitted from the soundboard is picked up, and a plurality of musical sound signals are respectively collected. With multiple microphones to convert,
A recording device for recording the plurality of musical sound signals;
Equipped with a,
The acoustic piano is a grand piano in which the soundboard is arranged horizontally,
The acoustic piano recording apparatus , wherein the plurality of microphones are attached so as to face a lower surface of the soundboard . The acoustic piano recording apparatus according to claim 1, further comprising a speaker that is disposed above the soundboard and emits a plurality of musical sound signals converted by the plurality of microphones as musical sounds . An acoustic piano recording device that records an acoustic sound emitted from a soundboard of a piano body when a key is pressed,
An attachment mechanism provided in the piano body;
While facing the soundboard, it is attached to different predetermined positions of the piano body through the attachment mechanism, and the acoustic sound emitted from the soundboard is picked up, and a plurality of musical sound signals are respectively collected. With multiple microphones to convert,
A recording device for recording the plurality of musical sound signals;
With
The acoustic piano is an upright piano arranged with the soundboard in an upright state,
Wherein the plurality of microphones, recording device characteristics and to luer caustics piano that is mounted so as to face the back of the soundboard. 4. The acoustic piano recording apparatus according to claim 3 , further comprising a speaker that is arranged in front of the plurality of microphones and emits a plurality of musical sound signals converted by the plurality of microphones as musical sounds . The recording device is disposed outside the piano body,
A hole is formed in the soundboard,
A plurality of transmission means arranged in the piano body, connected to the plurality of microphones and the recording device through the hole, and transmitting a plurality of musical sound signals from the plurality of microphones to the recording device; The acoustic piano recording apparatus according to claim 1 , wherein the recording apparatus is an acoustic piano recording apparatus. Wherein the plurality of microphones, characterized in that it is a wireless microphone, the acoustic piano recording apparatus according to any one of claims 1 to 4. The acoustic piano recording apparatus according to any one of claims 1 to 6 , wherein the attachment mechanism is detachably attached to the piano body . The acoustic piano recording apparatus according to claim 7 , wherein the attachment mechanism is attached to a column of the piano body. The attachment mechanism is flexible and has an attachment portion formed in a band shape, and a support portion provided in the attachment portion for supporting the microphone,
The said attachment part has a pair of surface fastener which can mutually be engaged in the state which wound the said attachment part to the said support | pillar in the predetermined position mutually different in a length direction, It is characterized by the above-mentioned. Acoustic piano recording device. The acoustic piano recording apparatus according to claim 9, wherein a pair of hook-and-loop fasteners that can be engaged with each other are provided at a predetermined position of the attachment portion and the support portion . It said mounting portion, a portion in contact with the post in a state wrapped with the mounting portion to said post, characterized in that the vibration-proof material is provided, recording acoustic piano according to claim 9 or 10 apparatus. The plurality of microphones have low-frequency and high-frequency microphones respectively disposed on the low and high sound sides of the acoustic piano,
The low-frequency range and high-frequency range microphones are respectively provided with low-frequency and high-frequency range acoustic members for adjusting the sound quality of the acoustic sound collected. The recording apparatus of the acoustic piano in any one of 1 thru | or 11 . The acoustic member for bass has a sound insulation and / or reflective, characterized in that in between said microphone is provided so as to face the soundboard, according to claim 12 Acoustic piano recording device. The acoustic member for high sound range has sound insulation and / or reflection, and the first acoustic member provided to face the soundboard with the microphone interposed therebetween, and sound insulation and / or reflection. The acoustic piano recording apparatus according to claim 12 , further comprising: a second acoustic member disposed between the microphone for the high sound range and the soundboard . The acoustic piano recording apparatus according to claim 1 , wherein the attachment mechanism includes an adjusting unit that adjusts distances of the plurality of microphones from the soundboard . The acoustic piano recording apparatus according to claim 15 , wherein distances of the plurality of microphones from the soundboard are set so as to be larger as they are arranged on a higher sound side .

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