JP2007096690A - Apparatus for producing musical sound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily produce musical sounds with good quality. <P>SOLUTION: An acoustic diaphragm 21 is provided above a keyboard 8, and speakers 16a, 16b are provided below the keyboard 8. With this configuration, at a position close to the ears of a player, musical sounds approximate to vibration sounds produced by a sound board of an acoustic piano can be emitted by musical sounds emitted based on vibration of the acoustic diaphragm 21 and musical sounds emitted in such a way that the vibration propagates to a portion coupled to the acoustic diaphragm 21. Meanwhile, at a position close to the feet of the player, musical sounds approximate to reflection sounds obtained by reflecting the musical sounds emitted from the acoustic piano on the floor can be emitted from musical sounds emitted from the speaker 16 and musical sounds emitted in such a way that the vibration of the speaker 16 propagates to a portion coupled to the speaker 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a musical sound generating device, and is particularly suitable for use in sounding a musical sound by vibrating an acoustic diaphragm.

  Conventionally, in an electronic musical instrument, a musical sound is generated using a loudspeaker provided with a point sound source. However, when a musical sound is produced using this loudspeaker, the performer or audience will hear the musical sound produced from a limited position. Therefore, when a loudspeaker is used, it is difficult to generate a musical sound that imitates a musical sound generated from an acoustic piano. In view of this, an electronic musical instrument has been proposed in which an acoustic diaphragm is provided and a musical sound is generated by vibrating the acoustic diaphragm.

However, since an acoustic piano is large and has a complicated structure, it is difficult to generate a musical tone similar to that of an acoustic piano only by vibrating an acoustic diaphragm.
The present invention has been made in view of such problems, and an object of the present invention is to make it possible to generate a musical sound close to an acoustic instrument.

  The musical tone generator according to the present invention includes a performance operator operated by a performer to perform a performance, a surface sound source speaker provided above the performance operator and having a surface sound source, and the performance operator. And a point sound source speaker provided with a point sound source, and the surface sound source speaker is attached to the acoustic diaphragm and the acoustic diaphragm provided above the performance operator. And a vibration element for vibrating the acoustic diaphragm based on a musical sound signal.

  According to the present invention, since the surface sound source speaker is provided above the performance operator and the point sound source speaker is provided below the performance operator, the surface sound source is generated near the performer's ear by the surface sound source. The generated musical sound can produce a musical sound close to the vibration sound generated on the soundboard of an acoustic instrument. At a position close to the performer's feet, the musical sound generated by the point sound source can produce a musical sound close to the reflected sound from the musical sound generated from the acoustic musical sound. Therefore, it is possible to generate a musical tone close to an acoustic instrument.

(First embodiment)
Next, a first embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case where the musical tone generator is an electronic musical instrument will be described as an example.
FIG. 1 is a block diagram showing an example of a schematic configuration of an electronic musical instrument.
In FIG. 1, an electronic musical instrument 100 includes a central processing unit (hereinafter referred to as CPU) 1, a flash memory 2, a random access memory (hereinafter referred to as RAM) 3, an external storage medium mounting unit 4, and an external input. Output interface unit 5, signal bus 6, key scan circuit 7, keyboard 8, panel scan circuit 9, operation panel 10, musical tone generator 11, waveform flash memory 12, signal processor 13, A digital / analog converter (hereinafter referred to as a D / A converter) 14, a power amplifier 15, a speaker 16, and a vibration element 17.

  As shown in FIG. 1, the CPU 1, flash memory 2, RAM 3, key scan circuit 7, panel scan circuit 9, musical tone generator 11, external storage medium mounting unit 4, and external input / output interface unit 5 are each connected to a signal bus. 6 and can communicate with each other.

(keyboard)
The keyboard 8 has a plurality of keys and a plurality of key switches provided corresponding to each of the plurality of keys. The user of the electronic musical instrument performs a desired performance by pressing and releasing the keys.
(Key scan circuit)
The key scan circuit 7 is for performing scan processing of each key switch of the keyboard 8.

(control panel)
The operation panel 10 has various operators and a display device. In the electronic musical instrument of the present embodiment, for example, an LCD (Liquid Crystal Display) is provided as a display device. This LCD displays the selection state and setting state of various controls.
For example, a power switch for supplying power to the electronic musical instrument, a reset switch for resetting the setting state of the electronic musical instrument to an initial value, a dial for setting the tempo and volume, and a tone A tone color selection switch or the like for selection is provided. However, it goes without saying that the operation element is not limited to these.

(Panel scan circuit)
The panel scan circuit 9 is for performing scanning processing of various operators provided on the operation panel 10.
(CPU)
The CPU 1 is for overall control of the electronic musical instrument of the present embodiment, and performs, for example, the following processing while using the RAM 3 as a work memory in accordance with a control program stored in the flash memory 2. .

The CPU 1 inputs the result of the scan process performed by the panel scan circuit 9 and identifies the operation content of the operation panel 10.
Further, the CPU 1 inputs the result of the scan process performed by the key scan circuit 7 and identifies the key operation content (key press and key release).
Then, performance data based on the operation contents of the key (key depression and release) and data based on the operation contents of the operation panel 10 are assigned to the musical sound generating unit 11.

The performance data includes a key on / off signal indicating whether the operation of each key is a key depression (key on) or a key release (key off), a pitch as pitch data, and a velocity as volume control data. It consists of data, tempo information indicating the absolute value of the performance tempo (hereinafter simply referred to as tempo information as necessary), key touch response signals regarding the operation speed of each key, and the like.
Needless to say, the CPU 1 performs various processes in addition to those described above.

(Flash memory)
The flash memory 2 is a readable memory, and stores various data in addition to the control program of the CPU 1.

(RAM)
The RAM 3 is a readable / writable memory, and has a storage area for temporarily storing various necessary data during the program execution process of the CPU 1 and for storing editable parameter data. Part or all of the RAM 3 is backed up by a battery so that necessary data can be retained even when the electronic musical instrument is turned off.

(External storage unit)
The external storage medium mounting unit 4 is, for example, a CD-RW drive. The CPU 1 reads out a control program and various data stored in a CD-ROM mounted on the CD-RW drive and performs necessary processing. Needless to say, the external storage medium mounting unit 4 is not limited to a CD-RW drive, and may be a flexible disk (FD) device, a magneto-optical disk (MO) device, or the like.

(Interface section for external input / output)
The external input / output interface unit 5 is for exchanging data such as performance information with an external device. Specifically, the external input / output interface unit 5 is, for example, MIDI (Musical Instrument Digital Interface).

(Waveform memory)
The waveform memory 12 stores various musical sound waveform data corresponding to the timbre and range. In the present embodiment, the waveform memory 12 stores musical sound waveform data based on sound collection data acquired (sound collection) above an acoustic grand piano.
(Musical sound generator)
The musical tone generator 11 reads the necessary musical tone waveform data from the waveform memory 12 based on the performance data assigned by the CPU 1 as described above and the data based on the operation content of the operation panel 10, and outputs a digital musical tone signal. generate. In the electronic musical instrument 100 of this embodiment, a stereo signal is generated. Therefore, the tone generator 11 generates a digital music signal for the right channel and a digital music signal for the left channel.

(Signal processing part)
The signal processing unit 13 has a function of performing processing including delay processing, volume correction processing, frequency correction processing, phase correction processing, and sound image processing on the digital musical sound signal generated by the musical sound generation unit 11. These processes are performed based on the distance from the speaker 16 or the acoustic diaphragm 21 to the performer. In addition to this, the signal processing unit 13 has a function of performing filter processing (noise removal processing), sound quality adjustment, signal level (gain) adjustment, and the like.

(D / A converter)
The D / A conversion unit 14 has a function of converting the digital musical tone signal processed by the signal processing unit 13 into an analog musical tone signal.

(Power Amplifier)
The power amplifier 15 amplifies the analog tone signal D / A converted by the D / A converter 14 to an appropriate level.
(Speaker)
The speaker 16 is for generating an analog musical sound signal amplified by the power amplifier 15 as an audible signal. The speaker 16 has a point sound source, and is specifically a cone speaker, for example. Further, in the present embodiment, as shown in FIG. 2, there are two speakers, a right channel speaker 16 a and a left channel speaker 16 b, which are lower than the keyboard 8. It is provided at a position that faces the performer.

(Vibration element)
As shown in FIG. 2, the vibration element 17 converts an acoustic diaphragm 21 provided at a position substantially facing the performer above the keyboard 8 into an analog musical tone signal that has been amplified by the power amplifier 15. It is for making it vibrate based. Specifically, the vibration element 17 includes a so-called moving coil, has inductive impedance, and vibrates the acoustic diaphragm 21 by the action of electromagnetic force. As described above, in the present embodiment, a surface sound source speaker that produces a musical tone by the vibration of the acoustic diaphragm 21 by the vibration element 17 is formed.

  As described above, the electronic musical instrument 100 of the present embodiment generates a stereo signal. Therefore, the vibration element 17a for vibrating the acoustic diaphragm 21 based on the right channel music signal and the vibration element for vibrating the acoustic diaphragm 21 based on the left channel musical signal. 17b is connected to the electronic musical instrument 100 in parallel. These two vibration elements 17a and 17b have the same configuration, and are attached to the acoustic diaphragm 21 using, for example, an adhesive. The acoustic diaphragm 21 is formed using, for example, a spruce (wood) plate.

FIG. 3 shows an example of the distribution of the sound pressure gradient generated by the musical sound generated from the speakers 16a and 16b. FIG. 4 shows an example of the distribution of the sound pressure gradient generated by the musical sound generated from the acoustic diaphragm 21. FIG. 5 shows an example of the distribution of the sound pressure gradient generated by the musical sound generated from the acoustic grand piano. The sound pressure gradient distributions shown in FIGS. 3 to 5 are all created based on data measured at the same place. 3 to 5, the thicker the line, the greater the sound pressure, and the solid line indicates that the sound pressure is greater than the broken line.
As shown in FIGS. 3 and 4, the distribution of the sound pressure gradient generated by the musical sound generated from the electronic musical instrument 100 of the present embodiment has two large sound pressure gradients and is generated from the grand piano shown in FIG. It can be seen that it approximates the distribution of the sound pressure gradient caused by the musical tone.

  As described above, in this embodiment, the acoustic diaphragm 21 is provided above the keyboard 8, and the speakers 16a and 16b are provided below the keyboard 8, so that the position close to the performer's ear (musical tone). At a position where the sound is transmitted to the player's ear without being reflected), the musical sound produced by the vibration of the acoustic diaphragm 21 and the vibration transmitted to the portion connected to the acoustic diaphragm 21 By using the generated musical sound (by the musical sound generated by the surface sound source), it is possible to generate a musical sound close to the vibration sound generated on the acoustic piano soundboard. On the other hand, at a position close to the performer's feet (a position where the musical sound is reflected somewhere after being transmitted to the performer's ear), the musical sound generated from the speaker 16 and the vibration of the speaker 16 are coupled to the speaker 16. Musical sounds generated by propagating to a portion (by musical sounds generated by a point sound source) can generate musical sounds that are close to the sound reflected from the floor of the musical sound generated from an acoustic piano.

  In the present embodiment, a digital musical tone signal is generated based on musical tone waveform data based on data collected above an acoustic grand piano, and a delay process, volume (sound pressure) is applied to the digital musical tone signal. Since processing including correction processing, frequency correction processing, phase correction processing, and sound image processing is performed, it is possible to obtain the data without acquiring the data of the reflected sound from the musical sound floor that is sounded from the acoustic grand piano. It can be generated based on the sound collection data acquired above the acoustic grand piano. As a result, it is possible to reduce the number of tone generators (musical sound generators), musical sound waveform data, and processing circuits.

  In the present embodiment, the case where the vibration elements 17a and 17b have the same configuration has been described as an example. However, the total mass of the vibration elements 17a and 17b is substantially the same as the mass of the acoustic diaphragm 21. If so, the vibration elements 17a and 17b may not have the same configuration. For example, the vibration elements 17a and 17b may be different in size and shape.

  Further, although the case where the number of the vibration elements 17 attached to the acoustic diaphragm 21 is two has been described as an example, the number of the vibration elements 17 attached to the acoustic diaphragm 21 is any number. Good.

  Furthermore, if the acoustic diaphragm 21 is formed using a spruce (wood) plate made of the same material as the acoustic piano soundboard as in the present embodiment, a tone closer to that of an acoustic piano is reproduced. However, the acoustic diaphragm 21 is not limited to a spruce (wood) board. For example, the acoustic diaphragm 21 may be made of metal or casting.

  In the present embodiment, the acoustic diaphragm 21 is vibrated based on the musical sound signal generated by the musical sound generating unit 11 of the electronic musical instrument 100. However, various musical sounds such as a musical sound signal generated by a CD player are used. The acoustic diaphragm can be vibrated based on the signal.

  Further, in the present embodiment, a musical tone close to the reflected sound from the floor of the musical tone generated from the acoustic grand piano by performing processing including delay processing, volume correction processing, frequency correction processing, phase correction processing, and sound image processing. However, instead of or in addition to these processes, the sound emission surface (ie, the front surface) of the speakers 16a and 16b is directed toward the floor so that the sound is generated from an acoustic grand piano. The musical sound close to the reflected sound from the generated musical sound floor may be generated.

  Moreover, it is preferable that the mass of the acoustic diaphragm 21 and the total mass of the vibration elements 17a and 17b are substantially equal. Loss when propagating vibration from the two vibration elements 17a and 17b to the acoustic diaphragm 21 can be reduced, a good acoustic output can be obtained in a wide frequency band, and an acoustic grand piano can be obtained. Similarly, a high sound pressure gradient can be provided in a wide range.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
In the first embodiment described above, D / A conversion is performed after processing including delay processing, volume correction processing, frequency correction processing, phase correction processing, and sound image processing is performed on the digital musical sound signal. . On the other hand, in the present embodiment, the digital music signal is subjected to D / A conversion and then subjected to processing including delay processing, volume correction processing, frequency correction processing, phase correction processing, and sound image processing. . As described above, the present embodiment and the first embodiment described above differ only in part of the signal processing. Therefore, in the following description, the same parts as those of the first embodiment described above will be described with reference to FIG. Detailed description is omitted by attaching the same reference numerals as those in FIG.

FIG. 6 is a block diagram showing an example of a schematic configuration of the electronic musical instrument.
In FIG. 6, an electronic musical instrument 200 includes a CPU 1, a flash memory 2, a RAM 3, an external storage medium mounting unit 4, an external input / output interface unit 5, a signal bus 6, a key scan circuit 7, and a keyboard 8. A panel scan circuit 9, an operation panel 10, a musical sound generator 11, a waveform flash memory 12, a D / A converter 61, an analog signal processor 62, a power amplifier 15, a speaker 16, and a vibration. And an element 17.

(D / A converter)
The D / A converter 61 has a function of converting the digital musical sound signal generated by the musical sound generator 11 into an analog musical signal.
(Analog signal processor)
The analog signal processing unit 62 performs a process including a delay process, a volume correction process, a frequency correction process, a phase correction process, and a sound image process on the analog tone signal D / A converted by the D / A converter 13. Have These processes are performed based on the distance from the speaker 16 or the acoustic diaphragm 21 to the performer. In addition, the analog signal processing unit 62 also has a function of performing filter processing (noise removal processing), sound quality adjustment, signal level (gain) adjustment, and the like.

  As described above, even after performing D / A conversion and performing processing including delay processing, volume correction processing, frequency correction processing, phase correction processing, and sound image processing, the first embodiment described above. Although the configuration is complicated, a musical tone close to an acoustic piano can be generated as in the first embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
In the first and second embodiments described above, the speakers 16a and 16b are provided in the speaker box in which only the portions to which the speakers 16a and 16b are attached are opened. On the other hand, in this embodiment, the speakers 16a and 16b are provided on the back load horn. As described above, the first and second embodiments described above are mainly different from the first and second embodiments described above only in the configuration of the speaker box that houses the speakers 16a and 16b. The same parts as those in FIG. 1 are denoted by the same reference numerals as those in FIGS.

  As shown in FIG. 7, in the electronic musical instrument 300 of the present embodiment, the musical sound emitted from the back surfaces of the speakers 16a and 16b is generated from the front surface of the electronic musical instrument 300 (eg, below the sound emission surface of the speakers 16a and 16b). The back load horn 71 is provided. Thereby, the high tone and the middle tone can be generated from the sound emitting surfaces of the speakers 16a and 16b, and the low tone can be generated from the back load horn 71. Therefore, in this embodiment, in addition to the effects described in the first and second embodiments, the signal processing unit 13 shown in FIG. 1 and the analog signal processing unit 62 shown in FIG. Even without performing processing, frequency correction processing, phase correction processing, and sound image processing, it is possible to obtain an effect that a musical sound close to a reflected sound from a musical sound floor generated from an acoustic piano can be generated.

  However, if the signal processing unit 13 or the analog signal processing unit 62 shown in FIG. 6 performs a delay process, a volume correction process, a frequency correction process, a phase correction process, and a sound image process, a musical sound generated from an acoustic piano is generated. It goes without saying that a musical sound closer to the sound reflected from the floor can be generated.

  Note that the number, position, and configuration of the backload horn are not limited to those shown in FIG. For example, as shown in FIG. 8, two back load horns 81a and 81b are provided at the corners (corner portions) of the electronic musical instrument below the keyboard 8, and the front surfaces of these two back load horns 81a and 81b are The electronic musical instrument 400 may be configured to face the diagonal direction. In such back load horns 81a and 81b, the musical sound coming out from the back of the speakers 16a and 16b is generated from the side of the sound emitting surface of the speakers 16a and 16b.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described.
In the third embodiment described above, back load horns 71 and 81 are provided for generating musical sounds emitted from the back of the speakers 16 a and 16 b from the front of the electronic musical instrument 300. On the other hand, in the present embodiment, a musical sound is generated downward from the speaker 16 in the speaker box, and the generated musical sound is diffused by a diffuser to be emitted to the side of the electronic musical instrument. As described above, this embodiment and the third embodiment described above are mainly different from each other only in a part of the configuration when sound is generated from the speakers 16a and 16b. Therefore, the first to third embodiments described above are used. About the same part as a form, the same code | symbol as the code | symbol attached | subjected to FIGS. 1-8 is attached | subjected, and detailed description is abbreviate | omitted.

As shown in FIG. 9, an electronic musical instrument 500 according to this embodiment includes speakers 16a and 16b mounted in a speaker box 91 with a sound emitting surface (that is, the front surface) facing downward, and sound emission from these speakers 16a and 16b. Diffusers 92a and 92b attached at positions facing the surface. The diffusers 92a and 92b are formed of, for example, triangular pyramid iron, wood, plastic, or the like.
The musical sounds generated from the speakers 16a and 16b are diffused by the diffusers 92a and 92b. The musical sounds diffused by the diffusers 92a and 92b propagate to the opening portions formed on the front surface and the rear surface of the speaker box 91, and are sounded outward from the opening portions.

  As described above, in the present embodiment, the musical sound is generated downward from the speaker 16 in the speaker box, and the generated musical sound is diffused by the diffuser 92 to be generated to the side of the electronic musical instrument 500. In addition to the effects described in the first to third embodiments, a musical sound close to the reflected sound from the musical sound generated from the acoustic piano is transmitted to an audience other than the performer (for example, on the back side of the electronic musical instrument 500). The effect that you can tell to someone who is).

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described.
In the first to fourth embodiments described above, the musical sound is generated so that the vibration of the sound emitting surface of the speaker 16 is directly transmitted to the air. On the other hand, in this embodiment, the vibration of the sound emitting surface of the speaker 16 is propagated to the plate material, and the musical sound is generated by transmitting the vibration of the plate material to the air. As described above, the present embodiment and the first to fourth embodiments described above are mainly different from each other only in a part of the configuration for generating a musical sound from the speaker 16, and thus the first to fourth embodiments described above. About the same part as embodiment, detailed description is abbreviate | omitted by attaching | subjecting the code | symbol same as the code | symbol attached | subjected to FIGS.

  As shown in FIG. 10, the electronic musical instrument 600 according to the present embodiment is attached to the speaker 16 attached so that the sound emitting surface faces the front of the speaker box 103 and the opening on the front of the speaker box 103. The lower front plate 102, the sound emitting surface of the speaker 16, and the vibration propagation portions 101 a to 101 j attached between the lower front plate 102.

The lower front plate 102 is for generating a musical sound by the vibration propagated from the speaker 16 through the vibration propagation portions 101a to 101j. The lower front plate 102 is made of a wooden plate such as synthetic wood or spruce. As described above, in the present embodiment, a surface sound source speaker that generates a musical sound by the vibration of the lower front plate 102 is formed.
The vibration propagation portions 101 a to 101 j are for propagating vibration generated on the sound emitting surface of the speaker 16 in the surface direction of the lower front plate 102. The vibration propagation unit 101a is made of, for example, hollow cylindrical iron. The size of the hollow cylindrical iron constituting the vibration propagation unit 101a is appropriately determined according to the size of the sound emitting surface of the speaker 16. On the other hand, the vibration propagation parts 101b-101j are comprised with rectangular parallelepiped iron. The lengths of the rectangular parallelepiped irons constituting the vibration propagation portions 101b to 101j are appropriately determined according to the size of the lower front plate 102.

  As described above, since the iron vibration propagation portions 101a to 101j are provided between the sound emitting surface of the speaker 16 and the lower front plate 102, the vibration generated on the sound emitting surface of the speaker 16 is minimized. It is possible to quickly propagate the sound to the entire surface of the lower front plate 102, and to generate a musical sound based on a metal vibration similar to a musical sound based on the vibration of an acoustic piano frame. Therefore, it is possible to easily generate a musical sound that is close to the reflected sound from the musical floor generated from the acoustic piano.

In the present embodiment, the case where the number of speakers 16 is one has been described as an example. However, the number of speakers 16 is not limited to one and may be any number. Further, the number of vibration propagation units 101 is not limited to ten, and may be any number.
Furthermore, if the vibration propagation part 101 is made of iron, vibration generated on the sound emitting surface of the speaker 16 can be propagated as quickly as possible to the entire surface of the lower front plate 102, and musical sounds based on metal vibrations can be transmitted. However, the vibration propagation unit 101 may not be made of iron. For example, the vibration propagation unit 101 may be made of spruce. Further, the lower front plate 102 is not limited to wooden. In the present embodiment, since vibration generated on the sound emitting surface of the speaker 16 can be sufficiently propagated to the lower front plate 102 by the vibration propagation unit 101, without using expensive wood such as spruce, Even if inexpensive wood such as lauan material is used, it is possible to generate a musical sound without greatly deteriorating the sound quality.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

It is the block diagram which showed the 1st Embodiment of this invention and showed an example of schematic structure of an electronic musical instrument. It is the figure which showed the 1st Embodiment of this invention and showed an example of schematic structure of an electronic musical instrument, Fig.2 (a) is a front view, FIG.2 (b) is AA 'of Fig.2 (a). It is sectional drawing seen from. It is the figure which showed the 1st Embodiment of this invention and showed an example of distribution of the sound pressure gradient produced by the musical tone sounded from the speaker. It is the figure which showed the 1st Embodiment of this invention and showed an example of distribution of the sound pressure gradient produced by the musical tone sounded from the diaphragm for sound. It is the figure which showed the 1st Embodiment of this invention and showed an example of distribution of the sound pressure gradient produced by the musical tone sounded from the acoustic grand piano. It is the block diagram which showed the 2nd Embodiment of this invention and showed an example of schematic structure of an electronic musical instrument. FIGS. 7A and 7B are diagrams illustrating an example of a schematic structure of an electronic musical instrument according to a third embodiment of the present invention, in which FIG. 7A is a front view, and FIG. 7B is BB ′ in FIG. It is sectional drawing seen from. It is the figure which showed the 3rd Embodiment of this invention and showed the other example of schematic structure of an electronic musical instrument, Fig.8 (a) is a front view, FIG.8 (b) is C- of FIG.8 (a). It is sectional drawing seen from C '. It is the figure which showed the 4th Embodiment of this invention and showed the other example of the schematic structure of an electronic musical instrument, Fig.9 (a) is a front view, FIG.9 (b) is D- of FIG.9 (a). It is sectional drawing seen from D '. FIGS. 10A and 10B show another example of the schematic structure of the electronic musical instrument according to the fifth embodiment of the present invention, FIG. 10A is a front view, and FIG. It is sectional drawing seen from E '.

Explanation of symbols

1 CPU
2 Flash memory 3 RAM
4 External storage medium mounting section 5 External input / output interface section 6 Signal bus 7 Key scan circuit 8 Keyboard 9 Panel scan circuit 10 Operation panel 11 Music sound generation section 12 Waveform memory 13 Signal processing section 14, 61 D / A conversion section 15 Power Amplifier 16 Speaker 17 Vibration element 21 Acoustic diaphragm 62 Analog signal processing unit 71, 81 Backload horn 92 Diffuser 101 Vibration propagation unit 102 Lower front plate

Claims (8)

A performance operator operated by the performer to perform,
A surface sound source speaker provided with a surface sound source provided above the performance operator;
A point sound source speaker provided with a point sound source, provided below the performance operator;
The surface sound source speaker is an acoustic diaphragm provided above the performance operator;
A musical sound generating apparatus comprising: a vibration element attached to the acoustic diaphragm and configured to vibrate the acoustic diaphragm based on a musical sound signal.   2. The musical sound generator according to claim 1, further comprising a reflector that reflects at least a part of the musical sound generated from the point sound source speaker. A back load horn for guiding the musical sound generated from the back side of the point sound source speaker to the front side and generating the sound outside,
The musical sound generating device according to claim 2, wherein the reflector is formed on the back load horn. The point sound source speaker has a sound emitting surface facing downward,
The reflector is provided at a position facing a sound emitting surface of the point sound source speaker,
The musical sound generating device according to claim 2, wherein the musical sound generated from the point sound source speaker is sounded in a lateral direction after being reflected by the reflector. A second acoustic diaphragm provided at a position facing the sound emitting surface of the point sound source speaker and having a larger area than the sound emitting surface of the point sound source speaker;
Provided between the sound emitting surface of the point sound source speaker and the second acoustic diaphragm, and to propagate the vibration generated by the point sound source speaker in the surface direction of the second acoustic diaphragm. The musical tone generator according to claim 2, further comprising: a vibration propagation unit.   6. The vibration generated by the acoustic diaphragm is propagated to a portion connected to the acoustic diaphragm to which the vibration element is attached. The musical tone generator according to the item. A musical tone signal generating means for outputting a digital musical tone signal based on the operation of the performance operator;
Signal processing means for performing processing including processing for correcting at least one of delay, phase, frequency, volume, and sound image of a musical sound signal to be generated on the digital musical sound signal output by the musical sound signal generating means When,
Conversion means for converting the digital musical sound signal processed by the signal processing means into an analog musical sound signal;
Amplifying means for amplifying the analog tone signal converted by the converting means,
The musical tone generator according to any one of claims 1 to 6, wherein the vibration element vibrates the acoustic diaphragm based on the analog musical tone signal amplified by the amplification means. A musical tone signal generating means for outputting a digital musical tone signal based on the operation of the performance operator;
Conversion means for converting the digital musical sound signal output by the musical sound signal generating means into an analog musical sound signal;
Signal processing means for performing processing including processing for correcting at least one of delay, phase, frequency, volume, and sound image of a musical sound signal to be generated with respect to the analog musical sound signal converted by the converting means;
Amplifying means for amplifying the analog musical sound signal processed by the signal processing means,
The musical tone generator according to any one of claims 1 to 6, wherein the vibration element vibrates the acoustic diaphragm based on the analog musical tone signal amplified by the amplification means.

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