CN111613196A

CN111613196A - Electronic musical instrument for controlling tremolo and bend sound through somatosensory

Info

Publication number: CN111613196A
Application number: CN202010453812.7A
Authority: CN
Inventors: 刘洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-09-01
Anticipated expiration: 2040-05-26
Also published as: CN111613196B

Abstract

The invention discloses an electronic musical instrument for controlling tremolo and bend sound through body feeling, which comprises a shell; the control circuit board and the power supply device thereof are fixedly arranged in the shell; the air pressure sensor and the audio sounding circuit are electrically connected with the control circuit board; the front end of the shell is provided with a blowing nozzle; the air inlet of the air pressure sensor is connected with the blowing nozzle; the shell is provided with a bending sound switch key electrically connected with the control circuit board; the three-dimensional space position detection module is arranged in the shell and electrically connected with the control circuit board and used for detecting the current position and the changed position of the musical instrument and determining the elevation/depression angle change of the musical instrument, so that the vibrato opening and the amplitude/tone control of the vibrato/bend sound are realized. The invention realizes the function of controlling the tremolo amplitude or the pitch of the upper and lower bending tones of the electronic musical instrument; the tremolo or bend sound effect required by a player can be achieved without practice, and certain rhythm sense is achieved, so that the player is more tightly attached to the musical instrument and the music, and the player can enjoy the playing.

Description

Electronic musical instrument for controlling tremolo and bend sound through somatosensory

Technical Field

The invention relates to the technical field of electronic musical instruments, in particular to an electronic musical instrument for controlling vibrato and bending sound through body feeling.

Background

The electronic musical instrument refers to a musical instrument which triggers an electronic signal through a specific means by a player to make sound through an electroacoustic device by using an electronic synthesis technology or a sampling technology.

The electronic musical instrument is different from the traditional musical instrument, has a special electronic sounding body and has obvious characteristics. The sounding body of the traditional musical instrument is basically a string, a membrane, a spring, a plate or a metal body and the like. The sounding body of electronic musical instrument is an oscillator composed of several electronic elements, and through voltage amplification and different frequency changes, different audio signals are produced, then power amplification is carried out, and the specific sound is transmitted by loudspeaker.

The existing vibrato and bend sound are basic exercises which need to be exercised for a long time to achieve perfect effects, so that the vibrato and bend sound can not be used by people, are important decorative sounds in music, and can enrich and perfect the music only with the vibrato and bend sound.

However, in the existing electronic wind instruments, the vibrato method is generated in a mode of breath or occlusion of a mouthpiece, and has certain difficulty, if the control is not good, the vibrato is not smooth, and a method for fixing the vibrato cannot control the amplitude of the vibrato is provided; the bending tone is generated by a keyboard.

In view of the above, it is desirable to provide an electronic musical instrument that can automatically control the amplitude of the vibrato and the bending sound while realizing the vibrato and the bending sound without professional practice.

Disclosure of Invention

In order to solve the above technical problems, an electronic musical instrument for controlling vibrato and bending sound through body feeling according to an embodiment of the present invention includes: a housing; the control circuit board and the power supply device thereof are fixedly arranged in the shell; the air pressure sensor and the audio sounding circuit are electrically connected with the control circuit board; the front end of the shell is provided with a blowing nozzle; the air inlet of the air pressure sensor is connected with the blowing nozzle;

the audio sounding circuit comprises a multi-channel audio sounding chip and an audio filter circuit;

the shell is provided with a bending sound switch key electrically connected with the control circuit board;

the three-dimensional space position detection module is arranged in the shell and is electrically connected with the control circuit board to detect the current position and the changed position of the musical instrument and determine the elevation/depression angle change of the musical instrument, so that the vibrato opening and the amplitude/tone control of the vibrato/bend sound are realized;

if the three-dimensional space position detection module detects that the change angle is an elevation angle and determines the angle of the elevation angle, the control circuit board controls the tremolo tone to change a preset amplitude value and controls the upwarp tone to increase a preset tone;

and if the three-dimensional space position detection module detects that the change angle is a depression angle and determines the depression angle, the control circuit board controls the trill tone to change a preset amplitude value and controls the downward bending tone to reduce a preset tone.

In the scheme, the initial position of the instrument playing initial time is set as the starting position, and the three-dimensional space position detection module automatically detects and identifies the position change of the instrument based on the starting position, namely, the elevation angle is formed when the playing position of the instrument is higher than the starting position; when the blowing position is lower than the starting position, a depression angle is formed.

In the above solution, the initial position of the vibrato may be determined as the initial position of the musical instrument when the control circuit board detects that the instrument plays a long sound;

the starting position of the up/down bending sound may be the position of the instrument at the moment when the bending switch key is turned on.

In the above-described aspect, a limit value of the elevation/depression angle variation is set;

if the change of the position of the musical instrument exceeds the limit value of the set elevation angle/depression angle, the amplitude of the tremolo is the highest value/the lowest value, and the amplitude of the tone is not changed any more;

the pitch of the up/down bend tone is highest/lowest and the pitch does not change any more.

In the scheme, if the control circuit board detects that a long sound is played, the control circuit board determines to start a vibrato mode and determines that the current sound is regarded as original sound;

and if the player receives that the bending tone switch key is pressed down in the playing process, the control circuit board determines that the current tone is regarded as the original tone.

In the above scheme, a start angle (A1, B1) generated by up-and-down shaking relative to the start position is set;

when the angle of the upward movement or the downward movement of the musical instrument is larger than the initial angle, the vibrato mode is started; and during the playing, if the instrument returns to the range of the starting angle (A1, B1), the vibrato mode is closed.

In the above-described arrangement, a start angle (a2, B2) is provided which is caused to shake up and down with respect to the start position, and the up/down bend tone is turned on when the instrument is moved up or down by an angle greater than the start angle.

In the above scheme, the housing is further provided with an OLED liquid crystal screen and a setting key electrically connected with the control circuit board;

the OLED liquid crystal screen can display the current system parameter states of the musical instrument, such as the on state of the tremolo and the bend, the limit values of the elevation angle/depression angle of the tremolo and the bend, the tone, the range, the current electric quantity, the charging state, the tone magnetic value and the like;

the setting key is used for setting the functions of elevation/depression control conditions, limit values of elevation/depression changes, on/off harmony, tone magnetic values, system parameters, playing fingering switching and special effect tone keys.

In the above scheme, the casing is further provided with a plurality of special effect sound keys connected with the control circuit board, and the bending sound switch key can be set as any one of the plurality of special effect sound keys.

According to the electronic musical instrument, the air pressure sensor, the bent sound switch and the three-dimensional space position detection module are arranged in a matched mode, when the condition that the instrument plays a long sound or the bent sound switch is turned on is detected, a trill/bent sound mode is turned on, the three-dimensional space detection module can detect the position change of the instrument in a three-dimensional space in real time during the playing process of a player, determine the pitch angle formed by the change of the instrument and realize the function of controlling the trill amplitude or the pitch of the upward and downward bent sound of the electronic musical instrument; the tremolo or bend sound effect required by a player can be achieved without practice, and certain rhythm sense is achieved, so that the player is more tightly attached to the musical instrument and the music, and the player can enjoy the playing.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic rear view of the present invention;

FIG. 5 is a schematic view of a trailing end face provided by the present invention;

FIG. 6 is a schematic diagram of a linear relationship between the output voltage and the tilt angle of the three-dimensional detection module according to the present invention;

FIG. 7 is a diagram illustrating the relationship between pitch/yaw angle and trill value according to the present invention;

FIG. 8 is a schematic view of the elevation and depression angles of the present invention in use;

FIG. 9 is a schematic diagram of an error angle in a trill mode according to the present invention;

FIG. 10 is a schematic diagram of an error angle in the bending mode according to the present invention;

FIG. 11 is a diagram illustrating the relationship between the variation of the up/down angle of the musical instrument and the variation of the pitch of the up/down bending tone according to the present invention;

FIG. 12 is a schematic view of a shortcut key provided in accordance with the present invention;

FIG. 13 is a functional keyboard illustration provided by the present invention;

FIG. 14 is a schematic diagram of the distribution of the specific note keys (i) - (v) — provided by the present invention;

FIG. 15 is a schematic diagram of touch key signal amplification provided by the present invention;

fig. 16 is a schematic diagram of a circuit connection structure of the bending switch key 34 and the CPU chip according to the present invention;

the drawings illustrate the following:

1: a housing; 2: a blowing nozzle; 3: an air hole conversion device; 4: a gas-water separation device; 5: an air pressure sensor; 6: a water outlet; 7: a control circuit board; 8: a note button; 9: pressing a public end key; 10: an electric drum switch button; 11: switching the keys quickly; 12: quickly raising and adjusting the keys; 13: overtone keys; 14: an OLED liquid crystal screen; 15: shortcut keys are pressed; 16: a functional keyboard; 17: a tone setting/changing setting key; 18: special effect sound keys; 19: a power switch key; 20: setting a key; 21: an earphone output interface; 22: a MIDI output interface; 23: a power charging and system upgrade interface; 24: an audio output interface; 25: an upper layer key detection circuit board; 26: a first lower layer circuit board; 27: a second lower layer circuit board; 28: a third lower layer circuit board; 29: a fourth lower layer circuit board; 30: a convex column; 31: a battery case; 32: hanging a ring; 33: a housing reinforcing member; 34: a bending sound on-off key; 35: and a three-dimensional space position detection module.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, for the convenience of understanding, one end of the mouthpiece is referred to as a front end of the instrument, the opposite end is a tail end of the instrument, an upper end surface of the instrument is a front surface, and a lower end surface is a back surface to illustrate the present invention, which should not be construed as limiting the present invention.

The invention provides an electronic musical instrument for controlling tremolo and bend sound through body feeling, comprising: a housing 1; a control circuit board 7 and a power supply device thereof are fixedly arranged in the shell 1; the air pressure sensor 5 and the audio sounding circuit are electrically connected with the control circuit board 7; the front end of the shell 1 is provided with a blowing nozzle 2; an air inlet of the air pressure sensor 5 is connected with the blowing nozzle 2.

The audio sounding circuit comprises a multi-channel audio sounding chip and an audio filter circuit, the multi-channel audio sounding chip is internally provided with a vibrato and bending function, and the audio special effect of the vibrato and the bending can be generated as long as the chip receives a correct parameter command. The invention discloses a method for realizing vibrato and bending sound through a somatosensory mode, which is not a working principle of a chip with the function of vibrato and bending sound, and is not repeated.

The control circuit board 7 is specifically a CPU chip and a peripheral circuit for ensuring the normal operation of the chip;

the air pressure sensor 5 determines the breath pressure of the currently blown-in air and feeds the breath pressure back to the control circuit board 7, the control circuit board 7 converts the received breath pressure value into an audio command and transmits the audio command to the multi-channel audio sounding chip, the multi-channel audio sounding chip can emit different volumes, timbres, tones and special tones after receiving the corresponding command, the volume is determined by the breath pressure blown in by a player, and the larger the blown-in breath pressure is, the larger the volume is, the smaller the blown-in breath pressure is and the smaller the volume is.

A bending sound switch key 34 electrically connected with the control circuit board 7 is arranged on the shell 1 and used for switching a bending sound mode; the instrument is characterized by further comprising a three-dimensional space position detection module 35 which is arranged in the shell 1 and electrically connected with the control circuit board 7 and used for detecting the current position and the changed position of the instrument to determine the elevation/depression angle change of the instrument and realize the opening of the tremolo and the control of the amplitude/tone of the tremolo/bend.

The three-dimensional space detection module used in this embodiment is a three-axis gyroscope chip for detecting a change in an inclination angle of a musical instrument in a playing process, that is, an included angle (inclination) between a Z axis and an X axis in a space may be an MPU-6050 chip. The module has the working voltage of 3-5V, low power consumption and small volume. The working principle of the method is that direct angle data are finally obtained through a gyroscope and an acceleration sensor through a data fusion algorithm. The three-dimensional space detection module can send out the measured angle data in the form of voltage analog quantity data for the CPU chip or other chips to collect and use. The module has high precision and high stability. The accurate angle can be obtained at any position, and the specific parameters of the module are shown in the following table.

TABLE 1 three-dimensional space detection Module technical parameters

Name (R)	Parameter(s)
		Measuring range	-180°～180°
Resolution ratio	0.1°
		Measurement accuracy	1°
Repeatability of precision	1°
		Response frequency	100HZ(115200bps)
Operating voltage	3～5V
		Operating current	15mA
Operating temperature	-20°～85°
		Storage temperature	-40°～125°
Size of	13.5mm×20.3mm

The effect of the varying relationship between elevation/depression angle and spatial position on the vibrato amplitude variation and bend tone variation is explained in detail below, as shown in fig. 6.

After the three-dimensional space detection module is powered on, the analog quantity OUT pin directly outputs voltage, and the voltage and the inclination angle are in linear corresponding relation.

It can be seen from fig. 6 that the three-dimensional space detection module has different voltage values output by the OUT pin when the three-dimensional space detection module is at different angles, and only four special spatial positions are listed in the figure, which are respectively (a), (b), (c) and (d), and the module can output different voltage values at any spatial position (i.e. any included angle between the Z axis and the X axis) of the OUT pin, and the figure (a), (b), (c) and (d) corresponds to the output voltage of OUT 1.5V, OUT 0.8V, OUT 0.1V, OUT V and outputs the voltage values in real time, and the module can be embedded in the instrument by using the characteristics of the module and the OUT pin is connected with the analog quantity voltage acquisition pin of the core CPU chip, so that the CPU chip can acquire the Z axis position of the module in three-dimensional space in real time, and the three-dimensional space detection module is fixed with the instrument body, the Z-axis position of the module in three-dimensional space is equivalent to the Z-axis position of the instrument body in three-dimensional space. The change of the Z-axis position of the three-dimensional space detection module in the three-dimensional space is equal to the change of the Z-axis position of the instrument main body in the three-dimensional space. We use this feature to trigger the tremolo and bend functions of the multi-channel audio sounding chip.

Assuming that (a) is a horizontal position (X axis), then (b) is a look-up view, and (d) is a look-down view, where the angle between the look-up view and the look-up view is an elevation angle (the angle between the X axis and the positive direction of the Z axis), and the angle between the look-down view and the look-up view is a depression angle (the angle between the X axis and the negative direction of the Z axis).

In this embodiment, if the three-dimensional spatial position detection module 35 detects that the variation angle is an elevation angle and determines the elevation angle, the control circuit board 7 controls the vibrato tone to vary a preset amplitude value, or controls the upbend tone to raise a preset tone;

in this embodiment, if the three-dimensional spatial position detection module 35 detects that the variation angle is a depression angle, and determines the depression angle, the control circuit board 7 controls the vibrato tone to vary a preset amplitude, or controls the down bend tone to reduce a preset tone.

In the embodiment, the initial position of the instrument at the initial playing time is set as the starting position, and then the three-dimensional space position detection module 35 automatically detects and identifies the position change of the instrument based on the starting position, namely, when the playing position of the instrument is higher than the starting position, the elevation angle is formed; when the blowing position is lower than the starting position, a depression angle is formed.

The initial position of the tremolo can be determined as the initial position of the instrument when the control circuit board 7 detects that the instrument is playing a long tone. At this time, the starting position is 0 DEG, the elevation angle is a positive angle, and the depression angle is a negative angle. In the actual calculation process, the negative angle of the depression angle is calculated by taking the absolute value.

The start position of the up/down bending tone may be the position of the instrument at the moment when the bending switch key 34 is turned on.

In the embodiment, the instrument realizes the start of a tremolo/bend mode when detecting that the instrument plays a long tone or the bend switch is turned on by matching the air pressure sensor, the bend switch and the three-dimensional space position detection module, and the three-dimensional space detection module 35 can detect the position change of the instrument in a three-dimensional space in real time during the playing process of a player, determine the pitch angle formed by the change of the instrument and realize the function of controlling the tremolo amplitude or the pitch of the up-down bend tone of the electronic instrument; the tremolo or bend sound effect required by a player can be achieved without practice, and certain rhythm sense is achieved, so that the player is more tightly attached to the musical instrument and the music, and the player can enjoy the playing.

In this embodiment, a limit value of pitch/dip angle variation is set, and if the variation of the instrument position exceeds the set limit value of pitch/dip angle, the amplitude of the tremolo is the highest value/lowest value, and the tone amplitude is not changed any more;

the pitch of the up/down bend tone is the highest value/lowest value, and the pitch does not change any more;

as shown in fig. 7, the pitch/pitch angle and vibrato amplitude correspondence are illustrated:

in this figure, the Y-axis angle is the pitch/pitch angle of the instrument, wherein the Y-axis value is a variable which can be customized by the user, and can range from 0 ° to 100 ° (the elevation angle is a positive angle, the pitch angle is a negative angle, and in the actual calculation process, the negative angle of the pitch angle is calculated in absolute value, so it is regarded as the change from 0 ° to 100 °), the X-axis tremor amplitude is set to be a constant value of 100, and assuming that the player sets the Y-axis angle to be 0 ° -90 °, the corresponding change of the X-axis pitch amplitude is 0-100 °, at this time, the slope of the K1 straight line can be calculated by the slope calculation formula, and the corresponding tremor amplitude of the electronic instrument can be calculated in the change process from 0 ° to 90 ° by this slope. If the elevation angle of the electronic musical instrument exceeds 90 deg., the vibrato amplitude is increased to a maximum of 100. Assuming that the player sets the angle change of the Y axis to be 0-45 degrees, and the X axis is also the pitch amplitude change of 0-100, the slope of K2 can be calculated by the slope calculation formula, so the player sets different pitch/pitch angle values to generate different straight line slopes, and the different straight line slopes have respective corresponding relations with the vibrato amplitude. The above is the corresponding relationship between the elevation angle and the vibrato amplitude, and the corresponding relationship between the depression angle and the vibrato amplitude is the same as that.

In the bend mode, the upper and lower limit values of the bend tone can be customized by the player, and the setting range is: the upper limit value is not higher than 2 degrees of the initial original sound, the lower limit value is not lower than 2 degrees of the initial original sound, when the position of the current musical instrument changes to form an elevation angle, the pitch of the bend sound gradually rises, and when the upper limit value is reached, even if the elevation angle formed by the position change of the musical instrument is larger, the pitch can not rise any more; the bent tone gradually decreases when the position of the front instrument changes to form a depression angle, and when the lower limit value is reached, the tone does not decrease any more even if the depression angle formed by the change in the position of the instrument is larger. In this bend mode, whether the angle formed by the change in the current instrument position is an elevation angle or a depression angle is determined with respect to the previous instrument position.

In the present embodiment, the determination of the instrument starting point position can be specifically described as follows.

If the control circuit board 7 detects that a long sound is played, the tremolo mode is determined to be started, the position of the current musical instrument is determined to be the initial position, and meanwhile, the current sound is regarded as the original sound;

if the control circuit board 7 detects that the bending switch key 34 is pressed during the playing of the player, the bending mode is entered, and the current position of the instrument is determined as the starting position, while the current sound is regarded as the original sound.

The following describes a specific control process of the vibrato or the bending sound, which does not represent the limitation of a specific position, does not represent that the amplitude of the vibrato or the bending sound can be controlled only by a player blowing long sound uninterruptedly, and can also set a control mode of the amplitude of the vibrato or the bending sound according to requirements.

Control for vibrato or bend:

as shown in fig. 8, specifically:

(1) if the player plays a long tone continuously, the vibrato mode is started, and if the long tone is disconnected, the vibrato mode is ended;

in the vibrato mode, when the air pressure sensor 5 detects a sound head and blows long sound, a command is sent to the control circuit board 7, the control circuit board 7 determines that the current played tone is original sound, meanwhile, the three-dimensional space position detection module 35 detects that the starting position 1 of the musical instrument is sent to the control circuit board 7, at the moment, a player needs to continuously blow long sound, the three-dimensional space position detection module 35 detects that the electronic musical instrument changes to the position 2 and sends the position 2 to the control circuit board 7, at the moment, the position 1 and the position 2 generate an angle difference to form an elevation angle, the control circuit board 7 determines the size of the elevation angle to determine the amplitude of the vibrato, the larger the angle of the elevation angle is, the larger the amplitude of the vibrato is until the set maximum elevation angle is reached; conversely, the smaller the angle of the elevation angle is, the smaller the amplitude of the vibrato is; if the player always blows long tones, the amplitude of the vibrato is larger and larger in the process that the musical instrument is changed from the position 1 to the position 2, the vibrato returns from the position 2 to the position 1, the amplitude of the vibrato is reduced and the vibrato returns to the tone at the position 1, and therefore the amplitude of the vibrato can be controlled by the player instead of a fixed amplitude; if the player is in long-tone break during the playing, the player exits the vibrato mode; until the control circuit board 7 detects a long tone again, the three-dimensional position detection module 35 will detect again and set a new starting point position, and execute the same process. Therefore, the position of the starting point is not a fixed spatial position, but changes according to the change of the position sensed by the player during the playing.

Similarly, the depression angle control principle is the same as the elevation angle control working principle, and the difference is that the amplitude of the vibrato is larger and smaller in the process of changing from the position 1 to the position 3, and the amplitude of the vibrato is smaller and smaller from the position 3 to the position 1.

When the instrument changes beyond position 2/position 3, the vibrato amplitude no longer changes, and the amplitude at position 2/position 3 is maintained.

In the embodiment, because a person can shake when holding the instrument to play during the playing process, in order to avoid the start of the vibrato mode caused by the small-range shake of the instrument, the embodiment is provided with a starting angle (A1, B1) which is generated by shaking up and down relative to the starting position, and when the angle of upward movement or downward movement of the instrument is larger than the starting angle (A1 or B1), the vibrato mode can be started; and during the playing, if the instrument returns to the range of the starting angle (A1, B1), the vibrato mode is closed.

As shown in fig. 9, the angle (angle a) between position 1 and position a1 and the angle (angle B) between position 1 and position B1 are starting angles, which can be set by the player himself, and the error angle is set in the range of 0 to 20 degrees in the present embodiment.

(2) The opening of the upper and lower bending sounds is the same as the principle of the trill mode, and specifically comprises the following steps:

if the player presses the bending switch key 34 at any time during the playing process, the bending mode is started at this time, and the control circuit board 7 confirms the initial positions of the original sound and the musical instrument at this time; if the finger leaves the bend switch key 34, the bend mode is turned off. Therefore, the original tone obtained in each bend mode is related to the current tone when the bend switch key 34 is pressed.

When the position of the musical instrument is changed, the control is changed to the pitch.

In this embodiment, as shown in fig. 10, during the performance, when the musical instrument is changed from position 1 to position 2, the control of the pitch rising of the kick note is implemented, when the musical instrument is changed from position 2 to position 1, the control of the pitch lowering of the kick note is implemented, when the musical instrument is changed from position 1 to position 3, the control of the pitch lowering of the kick note is implemented, when the musical instrument is changed from position 3 to position 1, the control of the pitch rising of the kick note is implemented, and the specific pitch change law is related to the above-mentioned setting parameters.

The function of the bending-up sound: when the bend switch key 34 is pressed, the control circuit board 7 detects the starting position 1 and the current blowing tone, and changes the position 1 of the electronic musical instrument to approach to the position 2, the tone is gradually raised at this time, and when the tone reaches the set maximum value, the tone is not raised any more even if the current musical instrument position approaches or exceeds the position 2 again to the position 2. When the tone gradually falls back from the position 2 to the position 1, the tone gradually falls back to the tone at the position 1.

The function of the down bend sound: when the bending switch key 34 is pressed, the control circuit board 7 detects the starting position 1 and the current played tone, if the long tone is continuously played at this time, and the position 1 of the electronic musical instrument is changed to be close to the position 3, the tone is gradually reduced at this time, and when the position 3 is reached or exceeded, the tone is reduced to the minimum value and is not changed any more. When gradually rising from position 3 back to position 1, the tone will also gradually rise back to the tone at position 1.

As shown in fig. 11, the correspondence between the variation of the up/down angle of the musical instrument and the variation of the pitch of the up/down bend tone is exemplified.

As shown in the figure, the positive half axis of the Y axis is a pitch adjustment region of the upward bending sound, the pitch variation range is from the original sound to the upward bending sound by 2 degrees, (the upward bending sound is 2 degrees higher than the original sound and is a limit value of the upward bending sound and can be customized by a player in the range), Deltay is the variation of the pitch increase/decrease of each adjustment, the variation can be customized by the player, the magnitude of the value of Deltay determines the pitch increase/decrease speed, the larger the value is, the larger the slope of the straight line is, the faster the pitch variation speed is, otherwise, the smaller the value is, the smaller the slope of the straight line is, and the slower the pitch variation speed is. The X axis is the frequency of the position change of the musical instrument, and every time the position change of the musical instrument is carried out, the three-dimensional space detection module detects whether an elevation angle or a depression angle is generated at the moment, if the elevation angle is adopted, the current tone is equal to the current tone plus delta y, and if the depression angle is adopted, the current tone is equal to the current tone minus delta y. The initial value of the current pitch is the original pitch.

Similarly, the negative half axis of the Y axis is a pitch adjustment region of the downward bending sound, the pitch variation range is from the original sound to the downward bending sound by 2 degrees (2 degrees more lower than the original sound is a limit value of the downward bending sound, and can be defined by a player within the range), Δ Y is the variation of pitch increase/decrease at each adjustment, and the variation can be defined by the player, and the magnitude of the Δ Y value determines the pitch increase/decrease speed, the larger the value is, the larger the slope of the straight line is, the faster the pitch variation speed is, otherwise, the smaller the slope of the straight line is, and the slower the pitch variation speed is. The X axis is the frequency of the position change of the musical instrument, and every time the position change of the musical instrument is carried out, the three-dimensional space detection module detects whether an elevation angle or a depression angle is generated at the moment, if the elevation angle is adopted, the current tone is equal to the current tone plus delta y, and if the depression angle is adopted, the current tone is equal to the current tone minus delta y. The initial value of the current pitch is the original pitch.

The embodiment needs to be explained as follows: the inflections and the downturns cannot be generated simultaneously, but smooth transition is possible, for example, in the whole blowing process, the inflections switch key 34 is pressed all the time, and then the tone falls back to the position 1 from the position 2 and then to the position 3, and then the tone falls from the highest tone at the time of falling back to the starting point to the lowest tone at the position 3, and similarly, when the electronic musical instrument goes from the position 3 to the position 1 to the position 2, the tone rises from the lowest tone at the time of rising to the starting point to the highest tone again.

In this embodiment, as shown in fig. 10, since the start angle (a2, B2) generated by shaking up and down with respect to the start position is also set in this embodiment in order to avoid the start of the bending mode and the determination of the original sound caused by the small-range shaking of the instrument during the playing process, the up/down bending sound is turned on when the instrument is moved up or down by an angle greater than the start angle (a2 or B2); however, during the playing, the up/down bending tone is not turned off as long as the bending tone on-off key 34 is always pressed.

In this embodiment, the angle of the initial angle of the bend tone can be customized by the player, and is defined to be in the range of 1 ° to 20 °.

In the present embodiment, the variation Δ y of each adjustment of pitch up/down is customizable by the player in the range of 1% to 50% of the pitch of the original tone.

In this embodiment, the start position of the tremolo mode is fixed, and as long as the other notes are not changed or the played breath is not constant, the start position will always be that position. The starting position of the bending mode can be changed continuously, and the bending starting position is redefined once after the position of the instrument is changed or when the bending switch key 34 is pressed again. The somatosensory trill is controlled by an angle during playing, and the somatosensory bending sound is more like a sine wave pattern during playing.

The embodiment also comprises an air hole conversion device 3 and a gas-water separation device 4 which are fixedly arranged in the shell 1; the blowing nozzle 2 is connected with an air inlet of the air hole conversion device 3, the outlet end of the air hole conversion device 3 is connected with an air inlet of the gas-water separation device 4, and the air outlet end of the gas-water separation device 4 is connected with an air pressure sensor 5; the water outlet end of the gas-water separation device 4 is connected with a water outlet 6 arranged on the shell 1; the air pressure sensor 5 is connected with the control circuit board 7; the outer surface of the casing near the mouthpiece 2 is provided with a casing reinforcing member 33 adapted to the shape of the casing in order to make the whole electronic musical instrument structure more rigid.

The gas-water separation device 4 carries out water-steam separation on gas blown by a player, the separated water steam is discharged to a water discharge port 6 through a water discharge port of the gas-water separation device 4 and flows out, the separated breath is transmitted to the air pressure sensor 5 through an air discharge port of the gas-water separation device 4, the air pressure sensor 5 determines the current breath pressure and feeds the current breath pressure back to the control circuit board 7, the control circuit board 7 converts the received breath pressure value into an audio command and transmits the audio command to the multi-channel audio sounding chip, the multi-channel audio sounding chip can emit different volumes, timbres, tones and special tones after receiving the corresponding command, the volume is determined by the breath pressure blown by the player, the larger the blown breath pressure is, the larger the volume is, the smaller the blown breath pressure is, and the smaller the volume.

In this embodiment, the gas-water separation device 4 is a "Y" type three-way hose, and includes an air inlet, an air outlet, and a water outlet; the blowing nozzle 2 is detachably connected with the air hole conversion device 3; the gas that will insufflate is convenient for carry out gas, water separation to the setting of this structure to discharge the inside drying of assurance electronic musical instrument with the steam of separation, prolong electronic musical instrument's life.

In this embodiment, the casing 1 is provided with a plurality of note keys 8, a key common end key 9 and a drum switch key 10 electrically connected to the control circuit board 7, and the key common end key 9 is connected to the positive electrode of the power supply device.

The note keys 8 are matched with the key common end key 9 for use, the note keys 8 are all signal input ends, a player needs to press the key common end key 9 for a long time with one hand, presses the note keys 8 with the other hand, takes a human body as a conductor, a current signal flows to the touched note keys 8 from the key common end key 9, and the state is low level when the note keys 8 are not touched; when the note button 8 is touched, the state is changed from low level to high level, at the moment, the control circuit board 7 can convert the detected high level into a corresponding audio command and send the audio command to the multi-channel audio sounding chip in the format of MIDI communication protocol, when the multi-channel audio sounding chip receives the command, the multi-channel audio sounding chip can send out different timbres, tones and special tones, and the MIDI communication protocol can simultaneously control a plurality of channels in the multi-channel audio sounding chip in a coding mode.

In the embodiment, the note keys are arranged into two groups, each group comprises 4 note keys 8, and the design of the structure is convenient for a player to better coordinate and use the other 4 fingers except the thumb to press the note keys 8 when playing, so that the use feeling of the musical instrument is enhanced.

The multi-channel audio sounding chip of the embodiment is a multi-channel audio sounding chip of 16 MIDI input channels, wherein the 9 th channel is a percussion channel, other channels are audio channels, and each channel of audio channel has 128 timbres, 72 tones, a sliding tone, a bending tone and a tremolo; the 9 th percussion channel comprises 47 percussion instruments, and each channel independently controls volume and reverberation.

The electric drum switch key 10 is configured such that long-pressing the electric drum switch key 10 switches to the electric drum playing mode, and long-pressing the electric drum switch key 10 again switches back to the audio playing mode. The player switches between the electric drum playing mode and the audio playing mode by switching the electric drum switch keys 10, and in the audio playing mode, the note keys 8 are ordinary note keys and are electronic wind instruments such as electronic instrument with clarinet timbre. In the electric drum playing mode, the note keys 8 are changed into percussion keys, a player pushes the note keys 8 with fingers to make the musical instrument generate corresponding sound, and the player controls the volume of the drum through breath, so that the drum effect in playing is more expressive.

The shell 1 is also provided with a plurality of overtone keys 13 electrically connected with the control circuit board 7, each overtone key 13 corresponds to one sound range, and a player can select and press the corresponding overtone key 13 according to the playing requirement; in the present embodiment, 5 consecutive overtone keys 13 are provided, which are respectively the upper bass, middle treble, and super treble in turn, and the range of each register is 8 degrees. The switching of 5 register heights can be realized in the audio performance.

In this embodiment, if the electric drum playing mode is switched, the following conditions are included:

when the drum is played, namely, a player can only play the sound by pressing the note key 8 and simultaneously pressing any one of the bass, the middle and the treble keys in the overtone key, if the enable key of the drum is turned on, a certain key of the special tone needs to be pressed simultaneously. The volume is determined by the set volume parameter in the parameters, the volume is a fixed value, and the drum sound volume is unchanged.

If the player plays, the player changes the volume of playing on the basis of the drum playing, and the volume is determined by the calculation result of volume + air volume; the breath value is a variable which is changed by the change of the breath size of the player; the air volume is an amplification factor and is set by a player; therefore, when blowing the drum, the sound volume of the drum sound is variable and also varies according to the change in the size of the breath of the player.

In the embodiment, no matter blowing or popping, the touch control enabling switch (electric drum switch key 10) of the electric drum must be turned on; the configuration parameters under the drum mode have the volume range of 10-127; gas quantity: 1-10; reverberation: 0-127. The arrangement of the structure solves the problem that the existing electronic wind instrument has no percussion music sense in the actual playing of the blowing drum, and the added percussion keyboard mode enables a player to find the pleasure of striking the drum.

In this embodiment, the percussion keys may be set in three groups at most, which are respectively combined by 3 keys of "treble", "middle pitch" and "bass" and 8 note keys 8 in the harmonic keys 13 on the back of the musical instrument, so that 24 percussion keys can be combined together. Each note key can be provided with a percussion music which is set by a player; when one of 3 keys of 'treble', 'middle-pitch' and 'bass' is pressed, the percussion key is flicked again to generate percussion sound, a plurality of percussion keys can be flicked simultaneously in the same group to generate a plurality of percussion sounds at the same time, and 8 percussion sounds can be generated at most simultaneously; in the present embodiment, there are 47 percussion options, and the player sets the percussion corresponding to each note button by himself, and the parameter is changed by the following function keyboard 16 as well as the audio mode.

The function of the drum switch key 10 is: the two modes of the electric drum and the audio playing are switched, after the electric drum mode is entered, any one special effect sound key 18 can be selected to serve as an enabling switch key, the enabling function can also be closed, and when a certain special effect sound key 18 is started and selected to serve as the enabling switch key, the enabling switch key is required to be pressed frequently to make a sound when the electric drum is played in the electric drum mode. If this enable function is turned off, the drum can sound without holding the special tone key 18 while playing.

In this embodiment, the fast switch button 11 and the fast lift-up button 12 are electrically connected to the control circuit board 7 and disposed on the housing 1; the quick switching key 11 can quickly switch the set quick parameters; the quick-up key 12 is used to quickly raise the pitch during a performance.

In this embodiment, the control circuit board 7 is further configured to connect with a vibration motor, when the control circuit board 7 detects that the fast switch key 11, the fast rising key 12, the electric drum switch key 10, the fixed/modified setting key 17, the shortcut key 15, and the power switch key 19 are touched/pressed, and when the setting key 20 is pressed in combination with the electric drum switch key 10, the shortcut key 15, or the power switch key 19, the vibration motor is controlled to vibrate, so that a player can know that the setting is successfully switched without stopping to see parameters on the liquid crystal display, thereby improving the performance operating efficiency.

The shell 1 is also provided with an OLED liquid crystal screen 14, a shortcut key 15, a function keyboard 16, a tone setting/changing setting key 17, a special effect tone key 18, a power switch key 19 and a setting key 20 which are electrically connected with the control circuit board 7; wherein the content of the first and second substances,

the OLED lcd screen 14 can display the current system parameter status such as tone, range, shortcut number (1-6), current power (5-grid display), charging status, harmony function, whether the electric drum function is enabled, tone magnetic value, and tone fixing/changing status.

As shown in fig. 12, the shortcut key 15 includes 6 keys with serial numbers 1-6, the player sets shortcut parameters of the 6 keys according to the requirement, and the system can store the parameters of the 6 shortcut keys and can quickly switch to the set shortcut parameters.

In this embodiment, the shortcut key 15 may set shortcut parameters such as timbre, tone, range, fixed/modified tone, harmony 1, and harmony 2 corresponding to the 8 note touch keys 8; the harmony parameter setting comprises harmony volume, harmony color and harmony tone, and the functions can be set as shortcut parameters.

In this embodiment, in addition to the number keys 1-6 (shortcut key 15) for switching shortcut parameters, the shortcut key 11 can also be used for switching, where the shortcut key 11 is switched in a sequential manner, such as 1 to 2, 2 to 3, or 3 to 2, 2 to 1, and switched in this order or in a reverse order, and the shortcut key 15 can be switched in a jump between 1-6.

When the shortcut is stored or switched, the internal vibrating motor sends out vibration as a confirmation prompt.

As shown in fig. 13, the function keyboard 16 includes 6 keys, i.e., "enter", "exit", "up", "down", "plus", "minus", if the current mode is audio performance mode, the current tone can be raised by pressing the "up" key alone, the current tone can be lowered by pressing the "down" key alone, the tone number can be increased by pressing the "plus" key alone, the tone number can be decreased by pressing the "minus" key alone, there are 128 tone numbers in total, and different tone numbers represent different tone names; the long press of the 'back' key can display the tone name corresponding to the current tone sequence number. The system parameter setting is entered by independently pressing the enter key, and the parameter setting can be adjusted by the enter, retreat, up, down, plus and minus keys in the system parameter setting process. And the user can quit the system parameter setting and return to the audio playing interface by independently pressing a quit key. Wherein, the system parameter setting comprises:

(1) pressing a key: the larger the key rate wave parameter value is, the slower the key response speed is, and the smaller the key signal jitter is, otherwise, the smaller the key rate wave parameter value is, the faster the key response speed is, and the larger the key jitter signal is. The adjustment range of the key filtering parameters is 1-10, and the corresponding filtering time is 5-50 milliseconds.

(2) Fingering: the current audio playing mode can be switched to saxophone fingering or flute fingering.

In this embodiment, the 8 note touch buttons can generate different notes of 12 tones through different combination forms, and the notes of each tone include: the electronic musical instrument is provided with two common fingerings, namely, 1, #1/b2, 2, #2/b3, 3, 4, #4/b5, 5, #5/b6, 6, #6/b7 and 7', wherein each common fingering comprises a plurality of replacing fingerings. Specifically, as shown in the following table, the notes corresponding to the note button 8, the fast switch button 11, the special effect button 18 and the harmonic overtone button 13 provided on the casing 1 in different playing modes are respectively, wherein ● indicates that the finger is pressed, a circle indicates that the finger is not pressed, and the number of the harmonic overtone buttons is 5, and only one of the harmonic overtone buttons is pressed at the same time.

TABLE 1 saxophone fingering 1

TABLE 2 saxophone fingering 2

TABLE 3 flute fingering chart III

Musical notes

1

#1

2

#2

3

Fast switching key

○

Special effect sound key

○

Note button

●

○

Note button

●

○

●

Note button

●

○

Note button

○

●

○

●

○

Fast switching key

○

Special effect sound key

○

Note button

○

●

○

●

○

Note button

○

●

○

●

○

●

Note button

○

Note button

○

Overtone key

●

TABLE 4 flute fingering chart IV

(3) Gas quantity: the range of the parameter is 0-20, when the air volume value is 0, the mode is a playing mode at the moment, blowing is not needed, only the note button can be played to produce sound, but the volume can not be controlled in the playing mode, when the air volume value is greater than 0, the blowing mode is a blowing mode, the air volume value represents the minimum breath sound production numerical value, the air volume value is 5, the mode is a blow molding mode at the moment, the breath must be greater than 5 to produce sound, and the breath is not produced sound when the air volume value is less than 5. The breath size can also control the volume size when blow molding.

(4) Volume: the breath magnification factor can be set, so that the volume during playing can be controlled. The range of the air pressure sensor used in this embodiment is 0 to 5kPa, and this range corresponds to 0% to 100% of the total volume, so that when the air pressure value is maximum, the total volume is maximum, when the air pressure value is 0, the state is silent, but because the breath power of each person is different, and it is possible that someone who wants to blow the air pressure value to the full range takes much effort to reach, so an amplification factor is cited here, and in the above correspondence, it can be seen that when the air pressure value is 0, the volume is 0%, when the air pressure value is 1, the volume is 20%, when the air pressure value is 2, the volume is 40%, assuming that when the amplification factor (i.e., the value of the volume parameter) is 2, that is when the air pressure value is 0, the volume is 0%, when the air pressure value is 1, the volume is 40%, when the air pressure value is 2, the volume is 80%, when the range of the air pressure sensor is 0 to 2.5kPa, the corresponding total volume is 0% -100%. So it can save half the effort to make the volume up to 100%.

(5) Reverberation: the space effect is set within the range of 0-127.

(6) Dormancy: when the musical instrument is not operated, the musical instrument enters a countdown sleeping state, and the countdown setting range is 10-90 minutes. The countdown time may be set by the user himself. When the no-operation state reaches the set time, the musical instrument will be automatically turned off.

(7) Screen protection: after the function keyboard is started, when the function keyboard is not operated, the system enters a screen saver countdown state, and the countdown setting range is 10-60 seconds. The countdown time may be set by the user himself. And when the non-operation state reaches the set time, the OLED liquid crystal display screen is turned off. At the moment, the OLED liquid crystal screen can be lightened by pressing any key on the functional keyboard again, the function can be closed, and the OLED liquid crystal screen is always lightened when the screen protection function is closed.

(8) MIDI: when the MIDI functions are turned on, 16 MIDI channels can be set for controlling the external hard sound source. The channel range is 1-16, and when the function is started, the OLED liquid crystal screen displays the MIDI starting state and the MIDI channel serial number. This function may be turned off.

(9) And harmony volume: the harmony volume may be set as a percentage of the master volume. The range is 1% to 100%, and if 100%, will be as large as the volume of the leading tone.

(10) And harmony sound color: 128 timbres can be set.

(11) Harmonic tones: it is possible to set whether the pitch of the harmony sound is the same as the pitch of the tonic or differs by a few degrees, and the setting range is-7 to + # 1.

(12) A vibrato switch: 0: closing; 1: tremor of the qi; 2: angular tremor; 3: air angle;

0: when the vibrato function is off, there is no vibrato.

1: when the breath tremolo function is started, tremolo can be generated through the size of the breath quantity, and the larger the breath is, the larger the amplitude of the tremolo is, and the smaller the breath is, the smaller the amplitude of the tremolo is.

2: when the angle trill function is started, the trill amplitude can be controlled through the body feeling.

3: when the air angle vibrato function is started, the vibrato amplitude can be controlled in a mode of overlapping breath and angle.

(13) Multiple: the range is 1-20, with a default of 3. The significance of this parameter is: and amplifying the amplitude of the vibrato parameter.

(14) A gas area: the range is 10-127 and the default is 30. The meaning of this parameter is: if the value is 30, the variation interval of the value representing the vibrato amplitude variation is 0-30.

(15) Starting angle: the range is 1-20, the default is 2, and the function is the initial angle of the somatosensory trill and the somatosensory bending sound.

(16) Angle: the range is 0-100, default is 30, and this function is to set the upper limit value of the somatosensory trill pitch/depression angle change.

(17) Rising and adjusting: the range is 2 degrees smaller to 2 degrees larger. The meaning of this parameter is: when the fast up key 12 is pressed, a small 2 degree or a large 2 degree tone may be quickly raised.

(18) And (3) fast cutting: there are two modes: the parameter ranges from 0 to 6, 0 being the first mode, 1 to 6 being the second mode. As shown in fig. 14, the first mode is a key combination mode, when the fast switch key 11 and the key No. 4 of the note key 8 are pressed simultaneously, the current fast number is increased, for example, 1 is currently set, the fast switch key is switched to 2, if 6 is currently set, the fast switch key is switched to 1, that is, a cycle of 1-6, when the fast switch key 11 and the key No. 2 of the note key 8 are pressed simultaneously, the current fast number is decreased, for example, 2 is currently set, the fast switch key is switched to 1, and if 1 is currently set, the fast switch key is switched to 6, that is, a cycle of 6-1. In the second mode: the circular increment switching mode can only be 1 to 2, 2 to 3 and only increment, the current shortcut number can be set, for example, the set shortcut number is 3, and a circular increment is performed from 1 to 3. This mode can be triggered by pressing the fast switch button 11 alone, without the need for a combination button.

Tone setting/tone changing setting key 17: if the shortcut parameters are fixed tones, pressing the set shortcut keys (comprising the shortcut key 15 and the quick switching key 11) to directly read the set parameters such as tone, timbre and range in the shortcut keys, and if the shortcut parameters are tone changes, pressing the set shortcut keys to only switch to the set parameters such as timbre and range without changing the current tone. The pitch/key change can be set by touching a key or a system parameter.

The shell 1 is also provided with a plurality of special effect sound keys 18 connected with the control circuit board 7, and the bending sound switch key 34 can be any one of the plurality of special effect sound keys 18; in the embodiment, 5 special effect sound keys are arranged and are touch keys, 5 special effect sound functions of tongue-and-tongue, upward bending sound, downward bending sound, sliding sound and body sensing bending sound can be realized, the 5 special effect sounds can automatically set corresponding operation keys according to the operation habits of users, and the bending sound on-off key 34 can be set to be any one of the 5 special effect sound keys; each special effect sound key is an independent switch control key; wherein the content of the first and second substances,

the function of the flower tongue is as follows: the method simulates the blowing skill of the flower tongue through software, and can set the sound breaking speed of the flower tongue through the software, wherein the sound breaking speed is 2-50 ms.

Up/down bend function: the bending sound function on the multi-channel audio sounding chip can be triggered through the touch keys corresponding to the up/down bending sound, and the sliding speed of the bending sound can be set through software. Bending tone sliding speed: 1-30.

The function of the sliding sound: the sliding sound function on the multi-channel audio sounding chip can be triggered through the touch keys corresponding to the sliding sound, and the sliding speed of the sliding sound can be set through software. Sliding speed of sliding: 1-127.

The body feeling bending sound function: the body sensing function can trigger the body sensing bending sound function on the multi-channel audio sounding chip, and the sliding speed of the body sensing bending sound can be set through software. Sliding speed of body sense bending sound: 1-50.

Upper limit value of somatosensory bending sound: the range is as follows: 0-100. Default to 100.

Lower limit value of somatosensory bending sound: the range is as follows: 0-100. Default to 100.

Power switch key 19: the power switch adopts a silent silica gel key, and can be turned on/off by long-time pressing of the power switch.

A setting key 20, wherein a player is used for setting pitch/depression angle control conditions, pitch/depression angle change limit values, on/off harmony, tone color magnetic values, system parameters, shortcut keys, performance fingering switching, special effect key functions and the like according to requirements;

the method specifically comprises the following steps:

the shortcut key 15 is set as follows: the set parameters (tone, pitch, range, pitch/pitch, harmony 1, and harmony 2) can be quickly saved into the corresponding keys by the combination of the set key 20 and the shortcut key 15 (keys 1-6).

And harmony shortcut key setting: the set button 20 is combined with an "add" button to enable or disable the harmony 1 function, and the set button 20 is combined with a "subtract" button to enable or disable the harmony 2 function.

Tone magnetic value setting: the key 20 is arranged to be combined with the enter key to increase the tone magnetism value, and the key 20 is arranged to be combined with the exit key to decrease the tone magnetism value. The magnetic setting is to make the sound softer and magnetic by software, and the setting range is 0-127.

When the setting button 20 is pressed in combination with the "electric drum" button, an electric drum parameter setting interface can be entered. The volume of the current drum, the percussion parameters corresponding to each key of the drum, and the like can be operated by the "go", "up", "down", "add" and "subtract" keys of the function key pad 16.

When the setting button 20 and the power switch button 19 are pressed simultaneously, after a 20-second delay, the system is restarted, and factory settings are restored, and at this time, all parameters are restored to default parameters when the system leaves the factory.

In the present embodiment, the function of the electric drum switch key 10 is: the two modes of the electric drum and the audio playing are switched, after the electric drum mode is entered, any one special effect sound key 18 can be selected to serve as an enabling key, the enabling function can also be closed, and when one special effect sound key 18 is started and selected to serve as the enabling key, when the electric drum is played in the electric drum mode, the enabling key needs to be pressed for a long time, and then sound can be produced. If this enable function is turned off, the drum can sound without holding the special effects button 18 while playing, and this enable button functions as: preventing false triggering.

The shell 1 is also provided with an earphone output interface 21, a MIDI output interface 22, a power charging and system upgrading interface 23, an audio output interface 24 and a power management circuit which are electrically connected with the control circuit board 7;

the headphone interface 21: the standard 3.5 earphone output interface is adopted, and the earphone or the active sound box can be directly connected.

MIDI interface 22: a standard 3.5 earphone output interface is adopted, the communication protocol supports a standard MIDI communication protocol, and the MIDI output interface internally comprises three lines, namely a ground line, a data line and a direct current 5V power supply. Asynchronous serial communication is adopted during transmission, and the standard communication baud rate is 31.25 x (1 +/-0.01) KBaud.

Power charging and system upgrade interface 23: the B-type USB interface is used as a charging and communication interface, and the interface can charge a 3.7V lithium battery in the electronic musical instrument and can also be used for subsequent system upgrading. The voltage of the interface is a direct current 5V interface.

The audio output interface 24 of the present embodiment: a 6.35 binaural interface is employed. The interface can be directly connected with an audio input interface of an external power amplifier and also can be directly connected with an input interface of a microphone. The embodiment adopts multi-channel audio output, and can simultaneously output multiple channels at the same time; different audio channels can generate different tones to generate harmony effect, thus solving the harmony problem, and the combination of different tones generated by different channels can create new tone. And the harmony effect is that for example, the channel 1 is C-tone 'duo', the channel 3 is C-tone 'miaow', when two channels sound simultaneously, the harmony effect can be generated, the timbres of the two channels can be different, and the heard effect is different. Self-innovation tone effect: channel 1 is "duo" in C, channel 3 is "duo" in C, when two channels sound at the same time, if the tone of two channels is different, a new tone will be generated.

In this embodiment, the electronic device includes an upper circuit board 25 and a plurality of lower circuit boards, which are respectively arranged in the housing 1 and electrically connected with the control circuit board 7, and control is realized through signal transmission, wherein the control circuit board 7 is an intermediate circuit board;

the upper-layer key detection circuit board 25 is respectively electrically connected with the note key 8, the fast switching key 11, the fast rising key 12 and the two special effect sound keys 18, detects the pressing action of the keys and sends corresponding signals to the control circuit board 7; the upper layer key detection circuit board 25 is fixed on the upper surface in the casing 1 through the note keys 8, the fast switching key 11 and the two special effect sound keys 18.

The lower circuit boards comprise a first lower circuit board 26, a second lower circuit board 27, a third lower circuit board 28 and a fourth lower circuit board 29 which are sequentially arranged from left to right on the inner lower bottom surface of the shell 1;

the first lower circuit board 26 is electrically connected with the functional keyboard 16, the overtone touch key 13 and the air pressure sensor 5;

the second lower layer circuit board 27 is electrically connected with a pitch setting/pitch changing setting key 17, a key common end key 9, a shortcut key 15, a special effect tone key 18, an electric drum switch key 10, a setting key 20 and a power switch key 19;

the third lower circuit board 28 is electrically connected to the earphone output interface and the MIDI output interface;

the fourth lower circuit board is electrically connected with the power charging interface and the audio output interface, and the circuit board is connected with the control circuit board 7 by adopting a flexible flat cable.

The OLED liquid crystal screen 14 is connected to the core CPU.

The upper layer key detection circuit board 25, the first lower layer circuit board 26, the second lower layer circuit board 27 and the control circuit board 7 are connected by pins, and when the note key 8, the fast rising key 12, the special effect sound key 18 and the fast switching key 11 are touched/pressed, the control circuit board 7 can detect signals of the touched/pressed corresponding keys.

When the function key 16 on the first lower layer circuit board 26 is pressed or the harmonic overtone key 13 is touched, the control circuit board 7 can detect a signal of pressing/touching the corresponding key.

The tone setting/changing key 17, the special effect tone key 18 and the bend tone key 34 electrically connected to the second lower circuit board 27 are touched, and the control circuit board 7 can detect the signal of the touched/pressed corresponding key only when the key common end key 9 must be touched by a finger or the electric drum switch key 10, the shortcut key 15 and the setting key 20 are pressed.

The baroceptor 5 on the first lower circuit board 26 can transmit the breath pressure to the control circuit board 7 in digital form, the control circuit board 7 combines the data transmitted from the baroceptor 5 with the detected key information, sends the combined command to the multi-channel audio sounding chip on the control circuit board 7 to generate different tones and tones, and simultaneously sends the combined command directly to the MIDI output interface on the third lower circuit board 28 to control the external hard sound source.

The control circuit board 7 of this embodiment is further provided with a power management circuit and a power supply lithium battery connected with the power management circuit, the power management circuit includes lithium battery power detection, lithium battery charging and protection, power boost and buck management, and power on/off management, because the lithium battery is supplied with power by 3.7V-4.2V, and the MIDI output interface is supplied with power by 5V, the battery voltage is boosted to 5V and then output, and the internal chips are all 3.3V working voltage, so the battery voltage needs to be reduced to 3.3V and then supplied to the internal chips for use.

In this embodiment, the control circuit board 7 adopts a 32-bit ARM processing chip, the chip has 64 pins, and the chip includes pin interfaces of three communication protocols of IIC, SPI, and UART, a plurality of general input/output IO ports, and a plurality of analog signal acquisition interfaces, and the voltage acquisition range of the plurality of analog signal acquisition interfaces is dc 0-3.3V. Wherein the content of the first and second substances,

IIC pin: the air pressure sensor is directly connected with the IIC pin of the air pressure sensor detection chip through the pin header, so that the air pressure value detected by the air pressure sensor can be fed back to the core control CPU in a digital mode for data processing.

SPI pin: the SPI pin of the core control CPU is directly connected with the SPI pin of the Chinese character library chip on the circuit board of the layer, so that data in the Chinese character library chip can be directly read into the CPU, and the data are sent to the OLED liquid crystal screen to be displayed after being processed.

A UART pin: the UART sending pin of the core control CPU sends the audio command to the multi-channel audio sounding chip in the audio sounding circuit in the MIDI communication protocol format, and the multi-channel audio sounding chip can send out different timbres, tones and special tones after receiving the command and can also control the volume. The UART pin is connected in parallel with the MIDI output interface, and the external hard sound source can be controlled by the pin.

In the embodiment, the note keys 8, the overtone key 13, the fixed tone/modified tone setting key 17 and the special tone keys 18 are all metal touch keys; as shown in fig. 15, each touch key is connected to an IO input pin provided on the control circuit board 7 through a signal amplification circuit; the internal vibration motor is connected with an output IO interface of the CPU, the power management circuit is connected with an analog quantity signal acquisition interface of the CPU, and the three-dimensional space position detection module 35 is connected with the analog quantity signal acquisition interface of the CPU and the UART interface; when the touch keys are touched, since signals passing through a human body are very weak, a signal amplifying circuit is connected to each touch key, and the signals can be detected by the control circuit board 7 after passing through the signal amplifying circuit.

The electric drum switch key 10, the quick switching key 11, the quick rising and adjusting key 12, the quick key 15, the function key 16 and the setting key 20 are silica gel type keys, and the key connecting end is directly connected with the CPU chip.

As shown in fig. 16, it is a schematic diagram of a circuit connection structure of the bending switch key 34 and the CPU chip;

when the position of the three-dimensional space detection module at the Y axis of the space changes, the OUT pin of the module can be sent OUT in a voltage mode, at the moment, the voltage of the pin is collected through the analog quantity input pin of the CPU chip, the voltage is converted into a digital signal and is calculated with internal parameters, the result is converted into a MIDI communication protocol and sent to the audio sounding circuit, and at the moment, the audio sounding circuit can generate a bending sound effect. The process is free of time delay, so that the user can experience that the bending sound is controlled by the user in real time.

In this embodiment, as shown in fig. 2 to 5, the setting of each key is specifically as follows:

the keys on the front side of the shell 1 are provided with 8 note keys 8 which are respectively arranged into two groups, each group comprises 4 note keys 8, the left side of the first group of note keys 8 is provided with a special tone key 18 and a quick switching key 11, and the left side of the second group of note keys 8 is provided with a special tone key 18 and a quick rising key 12; the contact area of the note key 8 is larger than that of the special effect key 18, so that a player can distinguish the note key 8 from the adjacent keys through the key contact surface during playing; similarly, the special tone buttons 18 may be provided in different sizes or shapes for the convenience of the player to distinguish when playing.

The arrangement of the symmetrical structure of the middle shaft solves the problems that the positions of the left hand and the right hand of a musical instrument are fixed, the left hand is arranged at the upper part and the right hand is arranged at the lower part, a plurality of musical instruments such as Chinese flute, cucurbit flute and other Chinese classical musical instruments are symmetrical in the middle shaft in China, and for a plurality of people who have habitually used to hold the musical instruments with reversed hands (the left-handed person is that the right hand is arranged above the musical instrument and the left hand is arranged below the musical instrument), no way can be adopted for the positions of the hands of the existing electronic musical instruments, so that the symmetrical structure of the middle shaft is convenient for the left hand and the right hand. The method is suitable for musical instrument enthusiasts and can meet the requirements of specific people, and is more humanized.

The setting of 1 back button of casing from left to right distributes in proper order and does: the device comprises an OLED liquid crystal screen 14, a

functional keyboard

16, 5 overtone keys 13, a tone setting/changing setting key 17, two symmetrically arranged special effect sound keys 18, a key common end key 9 arranged in the two special effect sound keys 18, a quick switching key 11, a setting key 20 arranged in a triangular mode, an electric drum switch key 10 and a power switch key 19, an earphone output interface 21 and an MIDI output interface 22; the upper and lower parts of the key public end key 9 are provided with an integrated special effect sound key 18 which is set as a bending sound switch key 34 in the embodiment; and the key is not higher than the key height of the key common end key 9.

Two convex columns 30 are symmetrically and downwards extended from two sides of two special effect sound keys 18 on the left side and the right side of the key public end key 9, and the arrangement of the two convex columns 30 is convenient for placing musical instruments and protecting keys on the back;

the front surface of the shell 1 opposite to the key public end key 9 is provided with a group of note keys 8, so that when a player presses the key public end key 9 with a thumb, the rest 4 fingers flexibly press the note keys 8, and the two convex columns 30 limit the fingers pressing the key public end key 9, so that the player can hold a stable musical instrument conveniently.

In this embodiment, the side surface of the convex pillar 30 is provided with a metal touch pad, which is also a special effect sound key, and the two special effect sound keys need to be touched by sliding the side surface of the thumb, because the thumb belly cannot leave the common end key 9 at this time, the two special effect sound keys can be touched only by the side surface of the thumb.

In this embodiment, the left casing 1 of the tone setting/changing setting button 17 is provided with a power supply device, which includes a battery box 31 for storing a lithium battery and a lithium battery.

The battery box cover 31 is fixedly provided with a hanging ring 32 for hanging the embodiment.

A power charging and system upgrading interface 23, an audio output interface 24 and a water outlet 6 are arranged on the tail end face of the shell 1; the water outlet end of the gas-water separation device 4 is communicated with the water outlet 6 through a hose arranged in the shell, and the air hole conversion device 3 is connected with the air inlet of the gas-water separation device 4 through the hose.

The invention has the beneficial effects that:

(1) according to the invention, through the cooperation of the arranged vibrato switch, the bend switch and the three-dimensional space position detection module, a player can generate vibrato or bend sound in a body feeling manner, the vibrato or bend sound effect required by the player can be achieved without practice, and a certain rhythm sense is provided, so that the player can be more tightly attached to the musical instrument and the music, and can feel the playing pleasure.

(2) The invention can play a plurality of tones at the same time, can realize harmony function, can also create new tone by combining two or more tones, and can combine with each other to generate new tone and different harmony effects by using 128 basic tones set by the invention.

(3) The invention can realize the switching between the electric drum playing mode and the audio playing mode through the arranged electric drum switch key, the electric drum playing mode is a mode of using fingers to eject the key, and the sound volume of the drum can be controlled by breath in the ejecting process, so that the drum effect in playing is more expressive. At the same time, the device can emit the tone of a plurality of percussion music to form the effect of the drum set, and a user can set each key to be different percussion music according to personal playing habits and playing requirements.

(4) The invention is designed in a central axis symmetry mode, the left hand and the right hand can be interchanged when a player presses keys, no influence is caused, and the keyboard is suitable for musical instrument enthusiasts and can meet the requirements of specific crowds, thereby being more humanized.

The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the protection scope of the present invention, which has the same or similar technical solutions as the present invention.

Claims

1. An electronic musical instrument for controlling vibrato and bending sound through body feeling, comprising: a housing (1); the control circuit board (7) and the power supply device thereof are fixedly arranged in the shell (1); the air pressure sensor (5) and the audio sounding circuit are electrically connected with the control circuit board (7); the front end of the shell (1) is provided with a blowing nozzle (2); the air inlet of the air pressure sensor (5) is connected with the blowing nozzle (2);

a bending sound switch key (34) electrically connected with the control circuit board (7) is arranged on the shell (1);

the three-dimensional space position detection module (35) is arranged in the shell (1) and electrically connected with the control circuit board (7) and is used for detecting the current position and the changed position of the musical instrument and determining the elevation/depression angle change of the musical instrument, so that the tremolo opening and the amplitude/tone control of the tremolo/bend sound are realized;

if the three-dimensional space position detection module (35) detects that the change angle is an elevation angle and determines the angle of the elevation angle, the control circuit board (7) controls the tremolo tone to change a preset amplitude value and controls the upbend tone to increase a preset tone;

if the three-dimensional space position detection module (35) detects that the change angle is a depression angle and determines the depression angle, the control circuit board (7) controls the tremolo tone to change a preset amplitude value and controls the downward bending tone to reduce a preset tone.

2. The electronic musical instrument for controlling tremolo and bend through somatosensory control according to claim 1, wherein an initial position at an initial moment of playing the musical instrument is set as a starting position, and then a position change of the musical instrument based on the starting position is automatically detected and identified by the three-dimensional spatial position detection module (35), that is, an elevation angle is formed when a playing position of the musical instrument is higher than the starting position; when the blowing position is lower than the starting position, a depression angle is formed.

3. An electronic musical instrument for somatosensory control of tremolo and bend sounds according to claim 2, wherein the initial position of the tremolo is determined as the initial position of the instrument when the control circuit board (7) detects the long sound played by the instrument;

the start position of the up/down bending sound may be the position of the instrument at the moment when the bending sound switch key (34) is turned on.

4. An electronic musical instrument for somatosensory control of tremolo and bend sounds according to any one of claims 1 to 3, wherein a limit value of elevation/depression angle variation is set;

5. An electronic musical instrument for somatosensory control of vibrato and bending sounds as claimed in any one of claims 1 to 3, wherein if the control circuit board (7) detects a long playing sound, the vibrato mode is asserted on and the current sound is determined to be the original sound;

if the player receives that the bend switch key (34) is pressed in the playing process, the control circuit board (7) determines that the current sound is regarded as the original sound.

6. An electronic musical instrument for somatosensory control of tremolo and bend sounds according to any one of claims 1 to 3, wherein a start angle (A1, B1) is provided which is dithered up and down relative to the start position;

7. An electronic musical instrument for somatosensory control of tremolo and bend sounds according to any one of claims 1 to 3, wherein a start angle (A2, B2) is provided which is dithered up and down relative to said start position, the up/down bend sounds being turned on when the instrument is moved up or down by an angle greater than the start angle.

8. The electronic musical instrument for controlling tremolo and bending by somatosensory according to claim 1, wherein the casing (1) is further provided with an OLED liquid crystal screen (14) and setting keys (20) electrically connected to the control circuit board (7);

the OLED liquid crystal screen (14) can display the current system parameter states of the musical instrument, such as the on state of vibrato and bend sound in use, the limit values of the elevation angle/depression angle of the vibrato/bend sound, the tone range, the current electric quantity, the charging state, the tone magnetic value and the like;

the setting key (20) is used for setting the functions of elevation/depression control conditions, limit values of elevation/depression changes, on/off harmony, tone magnetism values, system parameters, performance fingering switching and special effect tone keys.

9. An electronic musical instrument for somatosensory control of tremolo and bending sounds according to any one of claims 1 to 3, wherein the casing (1) is further provided with a plurality of special effect keys (18) connected to the control circuit board (7), and the bending switch key (34) is provided as any one of the plurality of special effect keys (18).