JPH09127933A - Musical sound generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify and miniaturize the structure of a musical instrument by providing a phonetic section generating a sound via an air current and an air feeding means introducing air from the outside of a pipe and feeding it to the phonetic section on the pipe. SOLUTION: An organ pipe main body 10 is a pipe having a nearly circular cross section, and it is constituted of a resonance section 11 having a uniform cross section and an air guide section 12 formed into a taper shape. An opening 13 is formed on the outer periphery of the air guide section 12, and a tongue section 14 is fixed in the air guide section 12 while one side is faced to the opening 13. Portions on both sides of the opening 13 are bent inward, and an upper lip section 15 and a lower lip section 16 are formed to constitute a phonetic section 17. When air is fed to the inside from a guide port 12a formed on the air guide section 12, the air flows out from the gap between the tongue section 14 and the lower lip section 16 as a fine current. When this air current collides with the upper lip section 15, a musical sound is generated, and it is resonated and enlarged by the resonance section 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical tone generating device for supplying air to a sound tube to generate a sound, and more particularly to a musical tone generating device capable of making an air supplying mechanism compact.

[0002]

2. Description of the Related Art FIG. 5 is a schematic diagram showing a sounding system of a pipe organ. As shown in this figure, in the pipe organ, the wind generated by the blower 1 is sent to the rectifying device 2 to maintain a constant wind pressure, and this wind is sent to the plurality of wind boxes 3 (Fig. Then only one is shown). The wind box 3 is for selecting a tone color and pitch, and has sound tubes 7 having different materials and shapes for each wind box 3. A slider 5 interlocked with the operation of the stop 4 is arranged in the wind box 3, and the wind from the blower 1 is sent only to the wind box 3 selected by the operation of the stop 4. Further, a valve 8 for opening and closing a flow path of air to the sound tubes 7 is arranged at a connection portion between each sound tube 7 and the wind box 3. These valves 8 are opened by depressing a key of the keyboard 6, so that the one of the sound tubes 7 of the wind box 3 whose flow path is opened by the slider 5 corresponds to the depressed key. Is supplied and a musical sound is generated.

[0003]

By the way, in the above-mentioned pipe organ, since air is supplied from one blower 1 to each sound tube 7, ..., It is necessary to increase the capacity of the blower 1. At the same time, since the air consumption amount changes sequentially, the rectifying device 2 as described above is required. For this reason, the pipe organ was a fairly large instrument. Further, the structure of the slider 5 and the valve 8 for opening and closing the air flow path is also complicated. Therefore, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a musical tone generating apparatus capable of simplifying the configuration of a musical instrument such as a pipe organ and reducing the size thereof.

[0004]

According to a first aspect of the present invention, there is provided a musical tone generating apparatus, wherein a sound producing section for producing a sound by an air flow is provided in a pipe.
Air supply means for introducing air from the outside of the pipe and supplying the air to the sounding section is provided. A musical sound generating apparatus according to a second aspect is characterized in that a chamber for accumulating air is provided between the air supply means and the sounding section.

In the musical sound generating device according to the first aspect, the air supplying means introduces air into the pipe and supplies the air to the sound producing portion, and the sound producing portion produces sound by the air flow generated thereby. . Further, in the musical sound generating apparatus according to the second aspect, the pressure in the chamber is increased by supplying air into the chamber from the air supply means. Then, the pressure-increased air is supplied to the sounding unit, so that a sufficient wind pressure for sounding can be obtained.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

A. Description of Musical Sound Generator Hereinafter, an embodiment of the present invention will be described. First,
Prior to the description of the embodiment, the sound emitting principle of a sound tube will be described with reference to FIG. Figure 1
There are a fluid pipe shown in FIG. 1A and a lead pipe shown in FIG. In FIG. 1A, reference numeral 10 is a sound tube body. The sound tube body 10 is composed of a pipe having a substantially circular cross section, and includes a resonance part 11 having a uniform cross section and an air introduction part 12 formed in a tapered shape. Air introduction part 12
An opening 13 is formed on the outer periphery of the tongue portion 14, and a tongue portion 14 is fixed inside the air introduction portion 12 with one side thereof facing the opening 13. Further, both side portions of the opening 13 are bent toward the inside, and the upper lip portion 15 and the lower lip portion 16 are formed therein, thereby forming the sound producing portion 17.

In the above-mentioned full pipe, when air is supplied to the inside from the introduction port 12a formed at the end of the air introduction portion 12, the air is finely divided from the gap between the tongue portion 14 and the lower lip portion 16. It flows out as a simple flow. This air is divided into an inner side and an outer side by the upper lip portion 15 to form a continuous whirlpool or spiral. Then, such an air flow is generated in the upper lip portion 1.
By colliding with No. 5, a musical tone called “edge tone” is generated, and this musical tone resonates in the resonance unit 11 and becomes loud.

Next, in FIG. 1B, reference numeral 20 is an air introducing portion. The air introduction part 20 has a bottomed cylindrical shape, and has an inlet 20a at the bottom and an exhaust port 20b at the side.
Are formed. At the upper end opening of the air introduction part 20,
A block 22 in which the resonance tube 21 is inserted is inserted. The resonance tube 21 is configured by a pipe that expands in a tapered shape from the portion attached to the block 22 toward both ends. Further, a flange 23 is welded to the resonance tube 21 so that the resonance tube 21 does not easily move with respect to the block 22.

A flat lead receiver 2 is provided at the lower end of the resonance tube 21.
1a is formed, and a lead 24 is attached by a wedge 25 between the lead receiver 21a and the block 22. Further, a tuning pin 26 having a longitudinal direction oriented in the vertical direction is inserted through the block 22 and the flange 23 so as to be movable in the vertical direction. The lower end of the tuning pin 26 is in contact with the lead 24, and the free length of the lead 24, that is, the frequency can be adjusted by changing the vertical position of the tuning pin 26.

In the lead pipe as described above, air is supplied to the inside through the inlet port 20a, and the internal air is discharged through the exhaust port 20b. The air flow as described above vibrates the lead 24, and a musical tone having a pitch corresponding to the free length of the lead 24 is generated. Although this musical sound resonates in the resonance tube 21 and becomes louder, the musical sound generated by the lead pipe is excellent in consonance when it is made into a chord because the pitch can be clearly heard.

Now, the tone generating device of this embodiment is
The sound tube as described above is provided with an air supply mechanism,
FIG. 2 shows an example in which the present invention is applied to a flue pipe. In the following description, the same components as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 2, the lower end portion of the air introduction portion 12 has a cylindrical shape with a uniform cross section, and an axial fan (air supply means) 30 is attached to the inside thereof via a cushion material 31.
Reference numeral 32 in the figure denotes a casing of the axial fan 30, and a rotor 34 having a propeller 33 fixed to an upper end thereof is rotatably supported by a bearing 35 in the casing 32. A magnet 34a is fixed to the rotor 34, and the magnet 34a
A stator 36 attached to the casing 32 is arranged on the outer peripheral side of the. Further, the propeller 33 includes a front wing 33a and a side wing 33b, and the side wing 33b is arranged in a flow path 37 formed by the outer circumference of the stator 36 and the inner peripheral surface of the casing 31.

In the tone generator having the above structure, the rotor 3 is supplied by supplying the electric current to the winding of the stator 36.
4, the propeller 33 rotates, and as shown by an arrow in the figure, air is sucked into the air introducing portion 12 and is discharged from the gap between the tongue portion 14 and the lower lip portion 16. As a result, a musical sound is generated according to the same sounding principle as described above. As described above, in the musical tone generating device having the above-described configuration, the fan 30 is arranged in the air introducing portion 12 of the sound tube body 10, so that a blower such as a conventional pipe organ, a slider, a wind box, and a valve are not required. Therefore, when used in a pipe organ or the like, the structure can be downsized and simplified.

In particular, in the above embodiment, the axial flow fan 3
Since 0 is attached to the air introduction part 12 via the cushion material 31, it is difficult for the vibration generated when the axial fan 30 rotates to be transmitted to the sound tube body 10, and therefore it is possible to prevent the generation of abnormal noise. . Further, since the side wings 33b of the propeller 33 are arranged in the flow passage 37 on the outer peripheral side of the stator 36, the responsiveness when the axial fan 30 is started is good, and the structure can be downsized.
Furthermore, since the axial fan 30 is housed in the pipe-shaped sound tube main body 10, it can be externally configured with only a pipe, the appearance can be made smart, and space can be saved. .

B. Modified Example (1) The present invention can be applied to the lead pipe shown in FIG. 1 (B). In this case, the same axial fan 30 as that shown in FIG. 2 may be attached to the lower end of the air introduction part 20. (2) Plural axial fans 30 as described above are arranged in the axial direction to increase the wind pressure of the supplied air. (3) As shown in FIG. 3, the axial fan 3 of the sound tube main body 40
A chamber 41 having a large diameter can be provided in a portion between 0 and the sound producing section 17. In this tone generator,
The pressure in the chamber 41 is increased by rotating the axial fan 30 and supplying air into the chamber 41.
Then, the pressure-increased air is supplied to the sound producing unit 17, so that a sufficient wind pressure for sound production can be obtained.

C. Application Example Next, an application example of the present invention will be described. FIG. 4 is a block diagram showing an example in which the musical sound generating apparatus of the present invention is applied to an automatic performance organ. In FIG. 4, reference numeral 50 is a CPU that controls each part of the automatic performance organ. 51 is the CPU 50
This is a ROM that stores programs and performance data used in. A RAM 52 temporarily stores various data, and is used as a control data register used for control performed by the CPU 50. Reference numeral 53 denotes a panel switch section, which has a switch for selecting a music piece to be automatically played and for instructing start and stop of the performance. An electric switch control circuit 54 has an electric switch such as a relay built therein. Reference numeral 55 denotes a musical sound generating section composed of a sound tube such as a full pipe, and each sound tube has the same structure as that shown in FIG. The axial fan 3 provided in each sound tube
0 is connected to each of the above electric switches, and C
On / off control is performed by the PU 50.

Here, the musical sound generating section 55 has the same number of sound tubes as the conventional pipe organ. That is, in a pipe organ, since a plurality of wind boxes are provided for one keyboard, there are as many sound tubes as there are wind boxes for one key, and which wind box is used is selected by a stop. It is like this. Since the musical tone generator 55 of this automatic performance organ is equipped with all such sound tubes, it is possible to perform a peculiar performance of the pipe organ by selecting a stop to generate musical tones having different tones and pitches.

Next, the operation of the automatic performance organ having the above construction will be described. First, when a switch of the panel switch unit 53 is operated to instruct selection of a musical composition and start of automatic performance, the CPU 50 reads out selected performance data stored in the ROM 51 from the head address. Here, the performance data is composed of a plurality of event data such as event types (keyboard on / off, etc.), key codes, etc., and duration data indicating a reproduction time interval of each event data. , Each time the tempo clock is output, it is subtracted, and when it becomes 0, the next performance data is read. Then, after that, the next duration data is read and the same operation is performed thereafter.

When the performance data indicates that the keyboard is on,
Of the electric switches of the electric switch control circuit 54, the CPU 50 turns on the one corresponding to the key code of the performance data. As a result, current is supplied to the axial fan 30 to rotate it, and air is supplied to the sounding portion of the sound tube to generate sound. Then, when the keyboard is instructed to be turned off by the next performance data, the CPU 50 turns off the electric switch to stop the current supply to the axial fan 30. As a result, the rotation of the axial fan 30 is stopped and the sound output from the sound tube is stopped.

As described above, by using the musical tone generating device as shown in FIG. 2, sound can be emitted from the sound tube by a very simple control of turning on / off the electric switch of the electric switch control circuit 54. it can. Therefore,
The degree of freedom in designing the musical instrument is increased, and it becomes possible to perform the automatic performance of the pipe organ as described above.

D. Other Modifications (1) In the application example shown in FIG. 4, it is possible to detect a manual performance by the performer and supply the signal to the electric switch control circuit 54. For example, a keyboard sensor 60 for detecting the pressing and releasing of a key on the keyboard and a stop sensor for detecting the on / off of the stop are arranged, and the electric switch corresponding to the key related to the key pressing and the selected stop is turned on. Can be configured to be The stop in this case is not a drive for the slider of the wind box, but is configured as a switch for selecting a group of sound tubes.

(2) In the modification shown in FIG. 3, since it takes time for the pressure of the chamber 41 to rise after the axial fan 30 starts rotating, the start of sound generation is delayed by that time. Further, even if the rotation of the axial fan 30 is stopped, air is discharged from the chamber 41 for a while, so that the timing of the noise stop is delayed by that time. Thus, when the sound tube shown in FIG. 3 is used to construct the automatic performance organ shown in FIG. 4, the electric switch control circuit 54 can be controlled in consideration of the delay time between the sound generation start and the sound stop timing.
That is, the sound generation starts at time A and the stop timing at time B.
If there is a delay, the time (T-
After A), the electric switch is turned on, and the electric switch is turned off after a lapse of time (TB) from receiving the performance data.
As a result, sound generation is started after a time T after receiving the performance data, and the sound is stopped after a time T after receiving the next performance data. In this case, the times A and B are set for each sound tube.

(3) Even if the electric switch is turned off, the propeller of the axial fan may rotate due to inertia for a while, and the timing of stopping noise may be delayed. Therefore, a brake may be provided on the axial fan. The brake in this case may be one that mechanically brakes the propeller or one that obtains a regenerative current from the stator of the axial fan.

[0023]

As described above, according to the present invention,
No blower or valve like the conventional pipe organ is required, and therefore, when used for a pipe organ or the like, the configuration can be downsized and simplified (claim 1). Further, since the air pressure-increased in the chamber is supplied to the sounding section, it is possible to obtain a sufficient wind pressure for sounding (claim 2).

[Brief description of the drawings]

FIG. 1A is a vertical cross-sectional view showing a flue pipe,
(B) is a longitudinal sectional view showing a lead pipe.

FIG. 2 is a vertical cross-sectional view showing a musical sound generating device of an embodiment.

FIG. 3 is a vertical cross-sectional view showing a modified example of FIG.

FIG. 4 is a block diagram showing an example in which the present invention is applied to an automatic performance organ.

FIG. 5 is an air system diagram showing a conventional pipe organ.

[Explanation of symbols]

10 ... Sound tube main body (tube), 17 ... Sound generating section, 30 ... Axial fan (air supply means).

Claims (2)

[Claims] 1. A musical tone generating apparatus, characterized in that a pipe is provided with a sounding unit for generating a sound by an air flow, and an air supply unit for introducing air from the outside of the pipe to supply the sounding unit. . 2. The musical tone generating apparatus according to claim 1, wherein a chamber for accumulating air is provided between the air supply means and the sounding section.