JPS63285594A - Input device for electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an input device for an electronic musical instrument that obtains pitch information for forming musical tones based on the opening area of a loop or the narrow pressure of a finger. It is.

(Prior Art) A pitch master type synthesizer has been proposed in order to facilitate the pitch manipulation of a Seiko musical instrument.

(Problem to be Solved by the Invention) However, synthesizers with voice input format have problems such as difficulty in real-time response and large scale of two circuits, as well as the need for vocalization, making it impossible to perform instrumental music using only the synthesizer. There was a fundamental problem that there was no such thing.

(Means for Solving the Problems) The present invention focuses on the fact that the human body field pack system subtly works on the pitch of the sound and the constriction pressure of the nine layers of the opening area of the room and the constriction pressure of the fingers are controlled and converged, It is configured to detect these movements of the human body and supply pitch information corresponding thereto to the pitch information encoding/conversion means.

(Function) According to the above means, for example, when a pitch corresponding to the size of the constriction pressure of the tail is emitted, the performer listens to this with his ears, confirms the pitch, and feeds it back to the constriction pressure of the bubble. You can instantly converge to the correct pitch. In other words, a system similar to the feedback system of vocalization → ear → brain → vocalization is configured when a person controls the pitch by voice.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention. The input device 1 of the electronic musical instrument shown in FIG. 1 basically obtains pitch information based on the movement of the human body due to the constrictive pressure of the heart or the constrictive pressure of the fingers, and the pitch information is obtained from the sensor S1.
Get better. Also, volume information is obtained by sensor S2 based on exhalation. Although the semiconductor pressure sensor 81 and B2 are not particularly limited, it is possible to form a semiconductor region such as a diffusion layer on a silicon single crystal and detect the pressure on the semiconductor region as an analog voltage level based on a corresponding change in resistance value. It is something. The semiconductor pressure sensor S1 is used as pressure detection means by using a detection output corresponding to pressure as pitch information, and the output of the semiconductor pressure sensor 81 is converted into a digital (analog-to-digital) converter using the pitch information as an encoding conversion means. It is designed to be supplied to circuit 3. The resolution of pressure detection is determined by the sampling period and the number of conversion pits in the AD conversion circuits 3 and 4.

In the method of this embodiment, when pressure is applied by the movement of the human body, a corresponding pitch is emitted, and the user can hear whether it is the desired pitch or not and react instantly to adjust the pitch to the desired pitch by the movement of the human body. It is possible to converge.

This is exactly the same as a system in which when the human body produces vocalizations using two vocal cords, the pitch of the vocalizations is controlled while listening to the ears, and control 711 is possible in real time.

The configuration shown in FIGS. 2 and 3 makes it possible to perform the above-described pressure control with delicate finger control. In other words, the sensor array 2 shown in FIG.
is adapted to apply a pressure cuff to the lever 6. The lever 6 is connected to a pressure sensor 81 via a spring 9 using a lever with a fulcrum portion 8 as a fulcrum. Breath sensor S2
is located in the center, and controls the volume by holding the lever 6 between the eyebrows and blowing exhaled air onto the sensor s2. The lever 6 can also be pulled by squeezing it with a finger and blowing exhaled air onto the sensor S2.

The sensor array 2 shown in FIG. 3 shows only the pitch control section. In this method, the rubber bag 10 is pressed by the narrow pressure 11 of the fingers, and air pressure is transmitted from there to the center 81 to control the pitch. The inside of the rubber bag 10 is sealed by the sensor s1, and the load of the air pressure inside the rubber bag is applied to the sensor S2.

The i amount control sensor S2 can be arranged separately.

Furthermore, as an example of an applied modification, although not shown in the drawings, a method may be adopted in which the size of the opening area of the store is inputted as pitch information. In this case, there are two methods for determining the size of the opening area: one method uses an ultrasonic image measuring device, and the other method uses a television camera. In either case, the aperture area is integrally measured, and this signal is input to the CPU circuit 12 to select a pitch corresponding to the aperture area. The volume can be controlled in conjunction with an expiratory flow detection device.

Similarly, the movement of the vocal cords is detected using ultrasonic waves and the CPU circuit 12
You can also hammptu. In FIG. 1, numeral 12 is a CPU (Central Processing Unit) that controls the entire electronic musical instrument, and although its configuration is not specifically shown, it has an arithmetic control system and an instruction control system, and performs sequential processing according to a predetermined program. perform control operations. C! The PU12 has the above AD conversion circuit 3.
selectively specifies the digital pitch information output from the pitch standard setting section 13 and the tone color and the output control signal of the pitch standard setting section 13 that enables shifting of the octave of the musical tone to be generated by selectively specifying the pitch reference tone. The 00PU 12, which is supplied with the output control signal of the tone specifying section 14, supplies musical tone selection data such as an address signal to the musical tone generating section 15 based on each of the control signals described above.

The musical tone generating section 15 includes a POM (read only memory) (not shown) that stores various digital waveform data necessary for musical tone generation 7, and the digital waveform data corresponding to the address specified by the musical tone selection data. Output waveform data in parallel. The digital waveform data selectively outputted from the musical tone generation section 15 corresponds to waveform data for a melody or scale for generating musical tones, and is supplied to a multiplication circuit 16. Multiplication coefficient data is supplied to the multiplication circuit 16 via a coefficient circuit 17, and this multiplication coefficient data is supplied from the AD conversion circuit 3 to the coefficient circuit 17.
This is coefficient data for obtaining a predetermined volume according to the digital pitch information supplied to the. The multiplication circuit 16 multiplies the multiplication coefficient data by the digital waveform data supplied from the musical tone generating section 15 to output data in a format in which a predetermined volume is superimposed on a melody or scale.

The multiplication result data output from the multiplication circuit 16 is I)A
(Digital-to-analog) conversion circuit 18 converts the analog signal into a musical tone signal, and the musical tone signal is filtered in a filter circuit 19 to remove predetermined frequency components such as noise components, and then sent to an amplifier circuit 20. The amplified sound is emitted from the speaker 21 as a predetermined musical tone.

Next, the operation of the above embodiment will be explained.

An AD conversion circuit that receives the voltage of the semiconductor pressure sensor s2 as volume information when no pressure is applied to the sensor array 2 of the input device 1 with the pitch reference setting section 13 and the tone color setting section 14 initially set. 4 supplies the ninth multiplication coefficient data of zero volume to the multiplication circuit 16 via the coefficient circuit 17, and the AD conversion circuit 3 receives the output voltage of the semiconductor pressure sensor S1 as pitch information, and includes the 0PU 12 and the musical tone generator 15. Initial waveform data is supplied to the multiplication circuit 16 via. As a result, in the initial state, the output of musical tones from the speaker 21 is suppressed. When pressure is applied to sensor 1 of sensor array 2 of input device ff, the output voltage level of the pressure semiconductor sensor increases in accordance with the pressure and is supplied to the AD conversion circuit 3 as pitch information, which corresponds to the pitch information at that time. Digital waveform data for obtaining a scale corresponding to the scale information is supplied to the multiplication circuit 16 via the OP'12 and the tone generator 15. When exhaled air is blown into the sensor 2, the output voltage level of the semiconductor pressure sensor that receives the pressure of the exhaled air flow is increased in accordance with the pressure, and multiplication coefficient data for obtaining volume information is sent to the multiplication circuit 16 via the coefficient circuit 17.
is supplied to The multiplication circuit 16 multiplies the multiplication coefficient data corresponding to the output voltage values of the semiconductor pressure sensors S1 and S2 sampled at the same time by the digital waveform data on the Japanese tiles, and the multiplication result data is transmitted to the DA conversion circuit 18.
The speaker 21 emits musical tones at a volume corresponding to the total expiratory pressure at the predetermined time and at a scale corresponding to the movement of the human body, such as the constriction pressure.

As is clear from the above description, this implementation provides the following effects.

(1) Obtaining the pitch information necessary for musical tone formation based on the movement of the human body, such as the constriction pressure of the &. What's more, it is possible to play a musical instrument by emitting sound only from the instrument.

(2) The process from detecting the movement of the human body to emitting sound does not require complex data processing like that of a voice input synthesizer, and the circuit size can be reduced to a small scale, and musical sounds can be generated in real time without causing any audible discomfort. I can do it.

Although the embodiments have been described above, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist thereof. The semiconductor pressure sensor S1 is not limited to the selective diffusion mlA element described in the above embodiment, but may also be a single crystal bulk type element such as one using a silicon single crystal, or a vapor-deposited element formed by vapor-depositing germanium or the like on a film and molding it by photo-etching technology or the like. It may be changed to a type element or the like. The cm S2 for the volume sensor is not limited to semiconductor pressure sensors, and P
Pressure-sensitive diodes using n-junctions and sheet-key barriers,
It is possible to change to other pressure sensitive means such as a capacitor type expiratory flow detection 6 such as an electret condenser microphone. As a means for obtaining volume information, it is possible to employ a lever that is uniform on the keyboard keys, a sensor that detects the pressing force when a touch key is pressed, or the like. Breath detection can also be changed to a hot wire resistance change detection type flowmeter or a hydrodynamic flowmeter.

(Effects of the Invention) The input device for an electronic musical instrument of the present invention is equipped with a pressure detection means that outputs as pitch information an output at a level corresponding to the movement of the human body, such as the narrow pressure of the finger or the opening area of the finger. To enable a person who is not proficient in playing a musical instrument to easily emit sound at a desired pitch. Unlike voice input synthesizers, it does not require vocalization and can only emit sounds from musical instruments, so it can form a field of full-fledged musical instruments. Moreover, by obtaining the pressure-detected analog signal as pitch information, it is possible to obtain a scale simply by converting it into a data format that can be processed by an electronic musical instrument, so it can be used over a wide range of sampling data such as voice input synthesizers. It does not require particularly complex data processing such as correlation calculations, and it is possible to form musical tones with natural real-time performance while keeping the circuit scale relatively small.

[Brief explanation of drawings]

Figure 1 is a block diagram of an embodiment of the present invention, Figure 2 is a sectional view of a sensor array operated by a lever, and Figure 3 is a sectional view of a sensor array operated by a rubber bag. 1: Input device 11: Narrow pressure 2: Sensor array 12:0PITS1: Sensor 13
: Pitch reference setting section S2: Sensor 14: Tone setting section 5: AD conversion circuit 15: Musical tone generation section 4: Addition circuit 16: Multiplying circuit 5: Fixed section 17; Coefficient circuit 6: 18: DA Conversion circuit 7: Narrow pressure 19: Filter circuit 8: Support part 20
: Amplifier circuit 9 Spring part 21: Speaker 10: Rubber
bag

Claims (8)

[Claims] (1) An input device for an electronic musical instrument that forms musical tones based on encoded data of pitch information, which detects the narrowing pressure of the lips or fingers and outputs an output at a level corresponding to that pressure as pitch information. What is claimed is: 1. An input device for an electronic musical instrument, comprising a constriction pressure detection means for outputting constriction pressure as pitch information. (2) The input device for an electronic musical instrument according to claim 1, wherein the confinement pressure detection means is a semiconductor pressure sensor. (3) The input device for an electronic musical instrument according to claim 2, wherein the method of transmitting pressure to the semiconductor pressure sensor is a lever type. (4) The input device for an electronic musical instrument according to claim 2, wherein the method for transmitting pressure to the semiconductor sensor is an elastic air bag. (5) The scope of claim 1 is characterized by comprising a detection means for detecting the opening area of the lips with an ultrasonic image measuring device and outputting an output at a level corresponding to the area as pitch information. input device for electronic musical instruments. (6) The electronic musical instrument according to claim 1, further comprising a detection means for measuring the opening area of the lips with a television camera and outputting an output at a level corresponding to the area as pitch information. input device. (7) The movement of the human vocal cords is detected by an ultrasonic image detector, the movement of the vocal cords according to the pitch is identified as a pattern, and the area-integrated input is used as pitch information to output the corresponding pitch. An input device for an electronic musical instrument according to claim 1, characterized in that: (8) Claims 1, 2, 3, 4, 5, 6, or The input device for an electronic musical instrument according to item 7.