JP2002049369A - Input device of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pitch information and sound volume information from the output of sensors by simplifying the sensors which detect the flow speed of expiration stream and the total quantity of expiration which are blown into a mouth piece. SOLUTION: This input device 1 is provided with one piece of expiration stream sensor 2 which detects the flow speed of the expiration stream blown out of a lip and an expiration stream detecting means which consists of a funnel shaped gas collecting part 31 which detects the change of the total quantity of expiration in accordance with an opening area of the lip and the expiration stream sensor 3. The expiration stream detecting means outputs the output of a level corresponding to the flow speed of the expiration stream detected by the expiration stream sensor 2 as tone pitch information and, at the same time, outputs the total quantity of expiration detected by the expiration sensor 3 as sound volume information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument input device for obtaining pitch information and volume information for forming a musical tone in an electronic musical instrument based on expiration.

[0002]

2. Description of the Related Art Conventionally, pitch information for forming a musical tone of an electronic musical instrument is performed by operating a finger or the like.
The mastery is difficult, and you can't play without training. As a countermeasure, the inventor has proposed a method of detecting expiratory flow and obtaining pitch information according to this level as disclosed in Japanese Patent No. 2088394 as a method that can be easily operated by whistling. However, as shown in the figure of the above patent, there is a problem that a large number of pressure sensors are required and the cost is increased. Further, the patent proposes a method of pressing a keyboard key-like lever or a touch key, but a specific method of controlling a musical tone is insufficient. Practical application is difficult due to the above problems, and improvement has been desired.

[0003]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is an input device for an electronic musical instrument which forms a musical tone based on pitch information and volume information. An expiratory flow sensor detects and outputs an output at a level corresponding to the flow velocity as pitch information, collects the total expiratory volume in a thin tube in a funnel-shaped air collecting section, and uses a single expiratory flow sensor mounted inside the thin tube. , The total expiratory volume is detected, an output at a level corresponding to the pressure is used as volume information, and a tone is generated based on the information.

According to a second aspect of the present invention, in the first aspect, the pitch information sets the correspondence between the flow velocity measurement value and each scale, while the volume information sets the total expiration volume measurement value for each scale. Corrected and calculated by the reference value based on the flow velocity value, correct the increase and decrease of the expiration pressure due to the pitch, and if the area where the expiration is blown is the same, the volume does not change even if the exhalation flow rate is changed and the pitch is changed. Instead, the volume is changed by changing the blowing area.

According to a third aspect of the present invention, the mouthpiece is divided by a partition plate in a blowing direction, and an expiratory flow sensor for detecting the flow velocity of the expiratory flow is provided in the center hole to generate pitch information, and the center hole and the side hole are provided. A funnel-type air collecting section is provided at the outlet of the tube, which communicates with the thin tube, and an expiration flow sensor is installed inside the thin tube to detect the total expiratory volume and produce volume information, and to generate a musical tone based on this information. It is characterized by having a part.

According to a fourth aspect of the present invention, the exhaled air blows into the side hole of the mouthpiece of the third aspect when the exhaled air is blown into the side hole, and the exhaled breath blown into the adjacent side hole flows from the side hole which does not blow the exhaled breath without the lips. It is characterized by attaching a check valve to prevent leakage.

According to a fifth aspect of the present invention, in the first aspect, an expiratory flow is detected, an output at a level corresponding to the flow rate is set as a pitch, and the total expiratory volume is collected by a funnel-type air collecting section and guided to a thin tube. The attached expiratory flow sensor detects the total expiratory volume and outputs and emits the first musical tone with the output of the level corresponding to the pressure as the volume. A touch key to be operated is provided, and when the switch is turned on by the touch key, a second or a plurality of tones corresponding to the pitch level of the first tone are emitted.

A sixth aspect of the present invention is characterized in that, in the fifth aspect, the first musical sound is emitted to the earphone as a navigator sound.

According to a seventh aspect of the present invention, there is provided an input device for an electronic musical instrument for forming a musical tone based on pitch information and pitch information, wherein the expiration flow is detected by one expiration flow sensor and the expiration flow is determined according to the flow rate. The level output is used as volume information, the total expiratory volume is collected in a funnel-shaped air collecting section, and a single expiratory flow sensor is mounted inside the narrow tube to detect the total expiratory volume, and this value is obtained as volume information. Dividing by the flow velocity value, a value proportional to the opening area of the lips is obtained, and this is used as pitch information. It is characterized in that a tone is generated based on such information.

According to an eighth aspect of the present invention, an output having a level corresponding to a value proportional to the area where the lips are opened is obtained by dividing the total expiratory volume value by the expiratory flow value obtained as volume information in the seventh aspect. A first musical tone is output as information, and a touch key operated by a finger after hearing the pitch information of the emitted navigator is provided. When the switch is turned on by the touch key, the pitch of the first musical tone is increased. A second or a plurality of musical tones according to the level are emitted.

A ninth aspect of the present invention is characterized in that, in the eighth aspect, the first musical sound is emitted to the earphone as a navigator sound.

[0012]

According to the first aspect of the present invention, a breath is blown by placing a mouth on the mouthpiece indicating the center position, and one breath flow sensor for pitch information and a breath flow sensor for volume information are blown. Pitch information and volume information can be obtained stably with only one expiratory flow sensor. Once the mouthpiece is applied to the mouthpiece, it is easy to continue playing at the same position, and the opening and closing of the lips and the intensity of the expiratory flow are fine-tuning operations that blow the required expiration to the correct position in search of the required pitch. You can do it unconsciously. As for the volume, the total expiratory volume can be adjusted by adjusting the opening surface of the lips to be blown, and the volume can be adjusted.

According to the second aspect of the present invention, when the total expiratory pressure measurement value is divided by the expiratory flow rate and the blowing area is the same, the volume does not change even when the exhalation flow rate is changed to change the pitch, and the volume is not changed. When changing, the blowing area is changed. As a result, the performance can be performed without changing the blowing area every time the scale changes.

According to the third aspect of the present invention, the partition plate is finely divided, the center hole and the plurality of side holes form independent airways, and the expiration flow sensor and the total expiration sensor can be used without reducing the energy of expiration to be blown. Since it can be transmitted to the flow rate sensor for measuring the expiration pressure, a stable pitch can be maintained.

According to the fourth aspect of the present invention, by attaching a check valve to the partition plate, when exhalation is blown, the exhaled breath blown out from the surrounding side hole to which the lips are not applied does not leak. The exhaled air volume is collected in the funnel-type air collecting section without leakage, and the exhaled air flow sensor is operated to accurately measure the total exhaled air volume and obtain desired volume information.

According to the fifth aspect of the present invention, it is possible to emit a stringed instrument, a percussion instrument or the like by using the first musical tone as a navigator tone and pressing a touch key with a finger while confirming the pitch. The navigator sound as a wind instrument and the sound of string instruments and percussion instruments can be played together to enhance entertainment. Further, by confirming the pitch with the navigator sound and pressing the touch key, accurate sound emission becomes possible. The navigator sound can also be adjusted to the minimum volume towards the performer.

According to the sixth aspect of the present invention, the first musical sound is used as a navigator sound, and the touch key is pressed by a person while confirming with the earphone. Is done, and a strong impression can be produced as a fresh expression. In this method, since the pitch is confirmed and the touch key is operated, accurate pitch setting can be performed, and the second musical tone can be used as a wind instrument to enhance the expression. A variety of musical expressions can produce effects such as a nursing home concert.

The invention according to claim 7, 8, or 9 is a method for adjusting the pitch by adjusting the degree of opening of the lips, that is, by adjusting the opening area, and adjusting the volume by adjusting the expiratory flow rate. The expression can be expressed differently from the method in which the pitch is adjusted by the expiration flow rate. A similar method of claim 7 is a grass flute. The grass flute blows and vibrates the ends of the leaves, and the pitch of the leaves is adjusted by narrowing or widening the leaves. The volume is adjusted according to the flow rate of the expiration that blows the leaves. The grass flute can play about 2 octave scales, and there are national circles such as the national grass flute network and circles in each district, and they are active. It takes about 10 days of practice to be able to make elementary sounds. Compared with this grass flute, the invention according to claim 7 is capable of producing a sound immediately and has a wide variety of timbres.

Although the method of the present invention blows like a whistle, it is not necessary to make a whistling sound, but only exhalation.
Only musical tones can be emitted. Compared to a method of inputting in a trumpet-like form by shaking the voice or lips, unnecessary sound is not generated and the perfection as a musical instrument is high.

Since this method can be played by the elderly who are not trained in the operation of musical instruments, the range of application can be expanded in the age of aging. You can enjoy playing musical instruments by organizing orchestras in nursing homes. In recent years, music has been said to help maintain health and prevent dementia. It has the same function as the method of inflating balloons and dieting, and the spread of this method is useful, and this method has a function as a care product.

[0021]

FIG. 1, FIG. 2, and FIG. 3 show an embodiment of an input device 1 of an electronic musical instrument 100 according to the present invention. The expiratory flow sensor 2 and the expiratory flow sensor 3 are a thermal type flow rate sensor, a pit-pipe press sensor, and a condenser type sensor which measures the air flow rate by detecting the air pressure in the air flow and converts this to an electric signal. It is a flow rate sensor such as a carbon microphone type sensor and a pressure semiconductor. The inside of the mouthpiece 4 is partitioned in the blowing direction by a partition plate 5, and a side hole 7 is provided symmetrically with the center hole 6. The expiratory flow sensor 2 is provided in the airway of the central hole 6.

As shown in FIG. 3, a check valve 31 is attached to the outlet of the side hole. The check valve 31 opens when blowing,
Close if backflow. The check valve 51 is configured by attaching a thin plate made of elastic plastic, phosphor bronze, or the like.

At the outlets of the central hole 6 and the side holes 7, a funnel-shaped air collecting portion 31 for collecting the whole amount of expiration is attached, and a total expiration pressure sensor 3 is mounted inside the narrow tube at the tip thereof to measure the expiration flow rate. To measure the total expiratory pressure.

The mouthpiece 4 is detachable, the air collecting portion 31 is washable, and an antibacterial material is used to prevent bacterial infection.

The information obtained by the above-mentioned detecting means is output to the tone generator 200.

FIG. 4 is a block diagram of the electronic musical instrument 100. According to the figure, the electronic musical instrument transmits pitch information and volume information necessary for forming a musical tone to the electronic musical instrument 10.
0 input device. The flow velocity value detected by the expiratory flow sensor 2 is encoded and supplied to an AD conversion circuit 10 that converts the flow velocity value into pitch information. The above total expiration pressure sensor 3
A that encodes the flow velocity value detected in step 1 and converts it into volume information
It is supplied to the D conversion circuit 11. These AD conversion circuits 10
And the resolution of the detection by the AD conversion circuits 11 and 12
Is determined by the sampling frequency and the number of bits converted. The converted value of the AD conversion circuit 11 is supplied to a coefficient circuit 17.

The central control processing unit CPU 12 performs sequential control according to a predetermined program. That is, the CPU 12 selectively controls the digital pitch information data and the pitch reference sound from the A / D conversion circuit 10 to shift the octave of the musical tone to be formed, thereby controlling the output of the pitch reference setting unit 13. A signal and an output control signal of the tone color setting unit 14 for selectively designating a tone color are supplied. The central control unit CPU transmits musical tone selection data such as an address signal based on each of the above control signals to the musical tone generating unit 15.
To supply.

The tone generator 15 has a ROM (not shown) storing various digital waveform data necessary for generating a tone.
(Read only memory) for outputting digital waveform data corresponding to the address signal specified by the tone formation selection data in parallel. The digital waveform data corresponds to waveform data for a melody or musical scale for generating a musical tone, and is supplied to the multiplication circuit 16. The multiplication coefficient data supplied to the multiplication circuit 16 is formed by the coefficient circuit 17,
This is coefficient data for obtaining a predetermined volume according to the digital pitch data processed by the conversion circuit 11.

The multiplying circuit 16 first performs a correction calculation on the measured value of the total expiratory pressure sensor 3 with a reference value set in advance for each scale, and then multiplies coefficient data and a digital waveform supplied from the tone generator 15. The data is multiplied, and a multiplication result in which a predetermined volume is superimposed on a melody or a scale is output. By correcting in this way, when the blowing area is the same, the sound volume becomes constant even if the total expiration pressure changes due to the operation of the pitch. The multiplication result data by the multiplication circuit 16 is converted by a DA (Digital to Analog) conversion circuit 18 into a tone signal as an analog signal. The tone signal is removed by a filter circuit 19 from a predetermined frequency component which is noise, then amplified by an amplifier circuit 21 and emitted from a speaker 21 as a predetermined tone.

Next, the operation of the above embodiment will be described. When exhalation is not blown toward the exhalation flow sensor 2 of the input device 1 in a state where the pitch setting section 13 and the tone color setting section 14 have been initialized (initial state), the AD conversion circuit 11 sends the volume to zero via the coefficient circuit 17. Is supplied to the multiplication circuit 16, and the AD conversion circuit 10 supplies data for initializing the pitch to the multiplication circuit 16 via the CPU 12 and the tone generation unit 15. As a result, no noise is generated from the speaker 21 in the initial state.

When exhalation is blown into the mouthpiece 4, the output voltage level of the total exhalation pressure sensor 3 increases in accordance with the exhalation flow, and is supplied to the AD conversion circuit 11 as volume information, converted into digital volume data, and converted into a coefficient circuit. 17 is output. The coefficient circuit 17 outputs multiplication coefficient data for obtaining a volume corresponding to the volume information to the multiplication circuit 16 based on the digital volume data. At the same time, the A / D conversion circuit 1 uses the flow velocity value of the expiration flow detected by the expiration flow sensor 1 as pitch information.
0, and digital waveform data for obtaining a scale corresponding to the pitch information at that time is supplied to the multiplication circuit 16 via the CPU 12 and the tone generator 15.

The multiplication circuit 16 multiplies digital waveform data by multiplication coefficient data corresponding to the output values of the expiration air flow sensor 2 and the total expiration pressure sensor 3 sampled at the same time, and converts the multiplication result data into a DA signal. Output to the circuit 18. The analog signal converted by the DA conversion circuit 18 has a volume corresponding to the total expiratory pressure at the predetermined time and a musical tone of a scale corresponding to the expiratory flow rate.
Sound is emitted from. Furthermore, with the configuration in which the volume data is divided by the pitch data, when the blowing area is the same, the volume does not change even if the total expiration changes due to the pitch operation. The volume can be changed by changing the blowing area. As a result, the operation of the pitch and the volume becomes easy. It is possible to instantaneously determine whether the tone emitted in this way is a desired tone, and adjust the pitch and volume.

FIG. 5 is a flowchart showing a touch key operation by a navigator sound. Here, the navigator sound is a sound generated by reducing the loudspeaker sound generated by the musical sound forming section 200 so as to be heard only by the player, or a sound heard from the earphone 25 (see FIG. 1). The expiration is blown into the tone generator, and the pitch corresponding to the flow rate of the expiration is emitted as a navigator sound.The performer listens to this with the ear and operates the touch key, inputs it to the tone generator, and from the tone generator, Releases string and percussion instruments. The navigator sound can be suppressed by lowering the volume toward the performer. In addition to the touch keys, a string of a stringed instrument or a string may be played with a bow. The volume information emits a volume corresponding to the total expiration pressure blown.

FIG. 6 shows a case where the navigator sound is emitted to the earphone, and the player listens to the ear and confirms the musical sound by pressing the touch key, inputs the sound to the musical sound generating unit, and emits the stringed instrument and the percussion instrument from the musical sound generating unit. Is a flowchart of a method for performing the following.

A seventh aspect of the present invention is the apparatus configuration shown in FIGS. 1, 2, 3 and 4. What differs from the first aspect is the block configuration in FIG. That is, the data of the total expiratory pressure sensor 3 and the data of the expiratory flow sensor 2 are respectively converted into coded digital data in an AD conversion circuit, and these two data are input to a division circuit, and the data of the total expiratory pressure sensor 3 are converted. The data is divided by the data of the expiratory flow sensor 2, and the result is input to the CPU and input to the tone generator. Next, the digital data of the expiratory flow sensor 2 is input to a coefficient circuit, and then to a multiplication circuit, where the tone input from the tone generator is multiplied by volume data. Claim 8,
The ninth aspect of the present invention is configured as shown in the flowcharts of FIGS.

[0036]

According to the present invention, one exhalation flow sensor for measuring the exhalation flow rate and one exhalation flow meter for measuring the flow rate by collecting the total exhalation volume in the funnel air collecting section by blowing the exhalation into the mouthpiece. Pitch information and volume information can be obtained stably only with the expiratory flow sensor.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an electronic musical instrument according to the present invention.

FIG. 2 is a sectional view of a mouthpiece.

FIG. 3 is a perspective view showing a check valve.

FIG. 4 is a perspective view of a mouthpiece.

FIG. 5 is a block diagram of an electronic musical instrument according to the present invention.

FIG. 6 is a diagram showing a flowchart of a method of emitting a navigator sound to a speaker.

FIG. 7 is a diagram showing a flowchart of a method of emitting a navigator sound to an earphone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input device 2 Expiration flow sensor 3 Expiration flow sensor 31 Funnel type air collecting part 4 Mouthpiece 5 Partition plate 51 Check valve 6 Center hole 61 Center hole mark 7 Side hole 8 Center hole 9 Touch key 10 AD conversion circuit 11 AD conversion Circuit 12 CPU 13 Voice reference setting unit 14 Tone setting unit 15 Music tone generation unit 16 Multiplication circuit 17 Coefficient circuit 18 DA conversion circuit 19 Filter circuit 20 Amplification circuit 21 Speaker 25 Earphone 100 Electronic musical instrument 200 Music tone formation unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D378 AD02 AD47 AD52 BB04 BB25 FF24 FF27 HA04 HB37 HB40 KK14 MM29 MM64 MM68 SB04 SD04 SD18 SE23 WW05 XX02 XX24 XX25 YY06

Claims (9)

[Claims] An input device for an electronic musical instrument that forms a musical tone based on pitch information and volume information, wherein the expiration flow rate is detected by a single expiration flow sensor that detects a flow rate of an expiration flow blowing from a lip. The output of the level corresponding to the flow velocity is set as pitch information, the total expiratory volume blown out from the lips is collected in a thin tube by a funnel type air collecting section, and one expiratory flow sensor for detecting the flow rate is installed inside the thin tube, An input device for an electronic musical instrument, comprising: an expiration flow detecting means for measuring a total expiration volume based on a flow rate of expiration and outputting it as volume information. 2. The method according to claim 1, wherein the pitch information sets the correspondence between the flow velocity measurement value and each scale, while the volume information sets the total expiration volume measurement value based on the flow velocity value set for each scale. Corrected and calculated by the reference value, and corrected the increase and decrease of the expiratory flow rate value due to the pitch, if the area for blowing the expiration is the same, the volume does not change even if the pitch is changed by changing the expiratory flow rate, the blowing area Input device for an electronic musical instrument characterized by changing the volume according to the change of the sound 3. The mouthpiece according to claim 1, wherein the mouthpiece is partitioned by a partition plate in the blowing direction, side holes are provided in the center hole and left and right objects, and one expiration flow sensor is provided in the center hole. The expiratory flow rate is measured, and this is used as pitch information. Exhaled air blown out from the entire outlet of the center hole and the side hole is collected in a thin tube by a funnel-type air collecting portion, and one expiratory flow sensor is provided inside the thin tube. An input device for an electronic musical instrument, comprising: an expiration flow detecting means for measuring an expiration flow rate to measure a total expiration volume and outputting the same as volume information. 4. The exhaust device according to claim 3, wherein when the air is blown into the side hole formed by the partition plate of the mouthpiece, the air blown from the adjacent side hole flows backward from the side hole which is not blown and the lip is not applied. Electronic musical instrument input device characterized by having a check valve to prevent leakage 5. The navigator according to claim 1, wherein a first musical tone having an output at a level corresponding to the expiratory flow as a pitch and an output at a level according to the total expiratory volume as a volume is output. A touch key operated by a finger upon hearing the pitch information of the first tone, and providing the touch key. When the switch is turned on by the touch key, a second or a plurality of tones corresponding to the pitch level of the first tone are emitted. Electronic musical instrument characterized by sound 6. The electronic musical instrument according to claim 5, wherein the first musical sound is emitted to the earphone as a navigator sound. 7. An input device for an electronic musical instrument that forms a musical tone based on pitch information and volume information, wherein the flow rate of the expiration flow blown out of the lips is detected by a single expiration flow sensor to detect the expiration flow rate. Using the output of the level corresponding to the flow rate as volume information, collect the total expiratory volume blown out from the lips into a thin tube by a funnel-type air collecting section, attach an expiratory flow sensor inside the narrow tube, and measure the total expiratory volume by the flow rate of expiration Then, the total expiratory volume value is divided by the expiratory flow rate value obtained as the volume information, and the expiratory flow detecting means is provided as an output at a level corresponding to a value proportional to the area where the lips are opened, as pitch information. Electronic musical instrument input device 8. An output of a level corresponding to a value proportional to an area where a lip is opened by dividing the total exhalation value in claim 7 by an expiration flow rate value obtained as volume information, as first pitch information. A tone key is output to emit a tone, and a touch key operated by a finger while listening to the pitch information of the emitted navigator is provided, and when the switch is turned on by the touch key, a second key corresponding to the pitch level of the first tone is provided. An electronic musical instrument that emits two or more musical tones 9. The electronic musical instrument according to claim 8, wherein the first musical sound is emitted to the earphone as a navigator sound.