CN111613196B

CN111613196B - Electronic musical instrument for controlling tremolo and curvelet through somatosensory

Info

Publication number: CN111613196B
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: 2023-09-26
Anticipated expiration: 2040-05-26
Also published as: CN111613196A

Abstract

The invention discloses an electronic musical instrument for controlling tremolo and curvelet through somatosensory, which comprises a shell; the control circuit board is fixedly arranged in the shell and the power supply device thereof; 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; a bending voice switch key electrically connected with the control circuit board is arranged on the shell; the three-dimensional space position detection module is arranged in the shell and is electrically connected with the control circuit board for detecting the current position and the changed position of the musical instrument and determining the change of the elevation/depression angle of the musical instrument, and the tremolo opening and the amplitude/tone control of the tremolo/curved sound are realized. The invention realizes the function of controlling the tremolo amplitude or the upper and lower bending sound tone of the electronic musical instrument; the tremolo or curved sound effect required by the player can be achieved without practice, and a certain rhythm is achieved, so that the player can be more closely attached to the musical instrument and the music, and the playing fun is realized.

Description

Electronic musical instrument for controlling tremolo and curvelet through somatosensory

Technical Field

The invention relates to the technical field of electronic musical instruments, in particular to an electronic musical instrument capable of controlling tremolo and curvelet through somatosensory.

Background

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

Unlike traditional musical instrument, the electronic musical instrument has special electronic sounding body and obvious characteristic. The sounding body of the traditional musical instrument is basically a string, a membrane, a spring, a plate or a metal body, etc. The sound producing body of electronic musical instrument is an oscillator composed of several electronic components, through voltage amplification, different frequency changes produce different audio signals, then power amplification is carried out, and specific sound is transmitted from loudspeaker.

The existing tremolo and curved sound are all basic functions which need to be practiced for a long time to achieve a perfect effect, so that the tremolo and curved sound can not be used by people, and are also important decorative sounds in music, and the music can be richer and perfect only by the tremolo and the curved sound.

However, in the existing electronic wind instruments, the tremolo method is generated by means of breath or a biting mouthpiece, and has certain difficulty, if the control is not good, the tremolo is not smooth, and the method is also that the tremolo is fixed, and the amplitude of the tremolo cannot be controlled; bending sounds are generated by the keyboard.

In view of the foregoing, there is a need for an electronic musical instrument that can realize tremolo and curved sound without specialized practice and automatically control the amplitude of the tremolo and curved sound.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides an electronic musical instrument for controlling tremolo and curved sound through somatosensory, comprising: a housing; the control circuit board is fixedly arranged in the shell and the power supply device thereof; 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;

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

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

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

If the three-dimensional space position detection module detects that the change angle is the depression angle and determines the depression angle, the control circuit board controls the tremolo tone to change by a preset amplitude value and controls the downbend tone to reduce the preset tone.

In the scheme, the initial position of the instrument at the initial playing moment is set as the starting position, and then the position change of the instrument based on the starting position is automatically detected and identified through the three-dimensional space position detection module, namely, when the playing position of the instrument is higher than the starting position, an elevation angle is formed; when the play position is lower than the start position, a depression angle is formed.

In the above-mentioned scheme, the starting position of the tremolo may be the initial position of the instrument confirmed 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 sound switch key is turned on.

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

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

the pitch of the up/down warp is highest/lowest and the pitch is no longer changing.

In the above scheme, if the control circuit board detects that the long sound is played, the tremolo mode is determined to be started, and the current sound is determined to be the original sound;

If the player receives that the bending switch key is pressed in the playing process, the control circuit board determines that the current sound is regarded as the original sound.

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

the tremolo mode is turned on when the instrument moves up or down by an angle greater than the start angle; and during the blowing, if the instrument returns to the range of the start angles (A1, B1), the tremolo mode is turned off.

In the above scheme, a starting angle (A2, B2) generated by up-and-down shake relative to the starting position is set, and when the instrument moves upwards or downwards by an angle larger than the starting angle, the up/down bending sound is started.

In the above scheme, the shell is further provided with an OLED liquid crystal screen and a setting key, wherein the OLED liquid crystal screen and the setting key are 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 tremolo and curved sound on states which are in use, the limit value of elevation angle/depression angle of the tremolo and curved sound, tone, gamut, current electric quantity, charging state, tone magnetic value and the like;

the setting key is used for setting the control conditions of elevation angle/depression angle, the limit value of elevation angle/depression angle change, on/off harmony, tone magnetic value, system parameter, performance fingering switching and special effect key functions.

In the above scheme, a plurality of special effect sound keys connected with the control circuit board are further arranged on the shell, 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, through the air pressure sensor, the bending switch and the three-dimensional space position detection module which are matched, when the opening of the instrument playing long-pitch or bending switch is detected, the opening of the tremolo/bending mode is realized, the three-dimensional space detection module can detect the position change of the instrument in the three-dimensional space in real time during the playing process of a player, and the elevation/depression angle formed by the change of the instrument is determined, so that the function of controlling the tremolo amplitude or the up-down bending tone of the electronic musical instrument is realized; the tremolo or curved sound effect required by the player can be achieved without practice, and a certain rhythm is achieved, so that the player can be more closely attached to the musical instrument and the music, and the playing fun is realized.

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 view in section A-A of FIG. 2;

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

FIG. 5 is a schematic view of a tail end surface according to the present invention;

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

FIG. 7 is a graph illustrating the correspondence between elevation/depression angle and tremolo values 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 view of the error angle in the tremolo mode of the present invention;

FIG. 10 is a schematic view of the error angle in the bending mode of the present invention;

FIG. 11 is a diagram illustrating the correspondence between the change in the up/down angle and the change in the up/down pitch of a musical instrument according to the present invention;

FIG. 12 is a schematic illustration of a shortcut key provided by the present invention;

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

FIG. 14 is a schematic diagram showing the distribution of specific note keys (1) - (8) according to the present invention;

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

fig. 16 is a schematic diagram of a circuit connection structure between the bending voice switch key 34 and the CPU chip provided by the present invention;

the drawings are as follows:

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 key; 9: a common end key is pressed; 10: an electric drum switch key; 11: a quick switching key; 12: a rapid rising key; 13: an overtone key; 14: OLED liquid crystal screen; 15: a shortcut key; 16: a functional keyboard; 17: setting/changing setting keys; 18: specific sound keys; 19: a power switch key; 20: setting keys; 21: an earphone output interface; 22: a MIDI output interface; 23: a power supply charging and system upgrading 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 circuit board; 28: a third lower circuit board; 29: a fourth lower circuit board; 30: a convex column; 31: a battery case; 32: hanging rings; 33: a case reinforcement member; 34: a bending voice switch key; 35: and the three-dimensional space position detection module.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

For ease of understanding, the invention is illustrated with one end of the mouthpiece being the instrument front end, the opposite end being the instrument tail end, the instrument upper end face being the front face, and the lower end face being the back face, and should not be construed as limiting the invention, as shown in fig. 1-5.

The present invention provides an electronic musical instrument for controlling tremolo and cursory through somatosensory, comprising: a housing 1; a control circuit board 7 fixedly arranged in the shell 1 and a power supply device thereof; 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.

The audio sounding circuit comprises a multi-channel audio sounding chip and an audio filter circuit, wherein the multi-channel audio sounding chip is internally provided with tremolo and curved sound functions, and as long as the chip receives a correct parameter command, the audio special effects of the tremolo and the curved sound can be generated. The invention discloses a method for realizing tremolo and curved sound in a somatosensory mode, which does not explain the working principle of the tremolo and curved sound function in a chip, and therefore, the method 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 current air pressure of the air to be blown in and feeds the air pressure back to the control circuit board 7, the control circuit board 7 converts the received air pressure value into an audio command and transmits the audio command to the multi-channel audio sounding chip, when the multi-channel audio sounding chip receives the corresponding command, different sound volumes, timbres, tones and special effect sounds can be emitted, the sound volume is determined by the air pressure blown in by a player, and the larger the air pressure blown in is, the smaller the air pressure blown in is, and the smaller the air pressure blown in is.

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

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

Table 1, three-dimensional space detection module technical parameters

Name of the name	Parameters (parameters)
		Measuring range	-180°～180°
Resolution ratio	0.1°
		Measurement accuracy	1°
Repetition accuracy	1°
		Response frequency	100HZ(115200bps)
Operating voltage	3～5V
		Operating current	15mA
Operating temperature	-20°～85°
		Storage temperature	-40°～125°
Size of the device	13.5mm×20.3mm

As shown in fig. 6, the effect of the change relationship between the elevation/depression angle and the spatial position on the tremolo amplitude change and the bending tone change is described in detail below.

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

It can be seen from fig. 6 that when the three-dimensional space detection module is at different angles, the voltage values output by the OUT pin are different, only four special space positions are listed in the figure, namely, the figures (a) (b) (c) (d), and the OUT pin can output different voltage values at any space position (namely, any included angle between the Z axis and the X axis) of the module, the corresponding output voltages of the figures (a) (b) (c) (d) are out=1. V, OUT =0. V, OUT =0. V, OUT =2.2v, and the output voltages are output in real time, no delay exists, the module can be embedded into the instrument, and the OUT pin is connected with the analog 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. 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 body in the three-dimensional space. We use this feature to trigger the tremolo and bend functions of a multi-channel audio sounding chip.

Assuming that the view (a) is in a horizontal position (X-axis), the view (b) is a look-up view, the view-up and look-up angle is an elevation angle (the angle between the X-axis and the positive direction of the Z-axis), and the view-down and look-up angle 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 detecting module 35 detects that the change angle is an elevation angle, and determines the elevation angle, the control circuit board 7 controls the tremolo tone to change by a preset amplitude value, or controls the upturned tone to rise by a preset tone;

in this embodiment, if the three-dimensional position detection module 35 detects that the change angle is the depression angle, and determines the depression angle, the control circuit board 7 controls the tremolo tone to change by a preset amplitude value, or controls the downbend tone to decrease by a preset tone.

In this embodiment, the initial position at the initial moment of playing the musical instrument 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 musical instrument based on the starting position, that is, when the playing position of the musical instrument is higher than the starting position, an elevation angle is formed; when the play position is lower than the start position, a depression angle is formed.

The starting position of the tremolo may be determined as the initial position of the instrument when the control circuit board 7 detects that the instrument is blowing a long sound. At this time, the initial position is 0 °, 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 takes an absolute value for calculation.

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

According to the embodiment, the air pressure sensor, the bending switch and the three-dimensional space position detection module are matched, when the opening of the instrument playing long-pitch or bending switch is detected, the opening of the tremolo/bending mode is realized, the three-dimensional space detection module 35 can detect the position change of the instrument in the three-dimensional space in real time during the playing process of a player, and the elevation/depression angle formed by the change of the instrument is determined, so that the function of controlling the tremolo amplitude or the up-down bending tone of the electronic instrument is realized; the tremolo or curved sound effect required by the player can be achieved without practice, and a certain rhythm is achieved, so that the player can be more closely attached to the musical instrument and the music, and the playing fun is realized.

In this embodiment, a limit value of change of the pitch/depression angle is set, and if the change of the position of the instrument exceeds the limit value of the set pitch/depression 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 bending tone is the highest/lowest value, and the pitch is not changed any more;

as shown in fig. 7, the correspondence of the elevation/depression angle and the tremolo amplitude is illustrated:

in the present figure, the Y-axis angle is the pitch/depression 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 depression angle is a negative angle, and in the actual calculation process, the negative angle of the depression angle is calculated as an absolute value, and thus is regarded as a change of 0 ° to 100 °), the X-axis tremolo amplitude is set to 100 as a constant, assuming that the player sets the Y-axis angle change to 0 ° -90 °, the corresponding X-axis pitch amplitude change to 0-100, and at this time, the slope of the K1 straight line can be calculated by the slope calculation formula, and the tremolo amplitude corresponding to the present electronic musical instrument in the change from 0 ° -90 ° can be calculated by this slope. The tremolo amplitude increases to a maximum of 100 if the elevation angle of the electronic musical instrument exceeds 90 °. Assuming that the player sets the angle change of the Y axis to 0 degrees to 45 degrees and the change of the X axis to 0 to 100 degrees, the slope of K2 can be calculated by a slope calculation formula, so that the player sets different values of the pitch/depression angle, different linear slopes are generated, and the different linear slopes and the tremolo amplitude have respective corresponding relations. The above-mentioned is the corresponding relation between elevation angle and tremolo amplitude, and the corresponding relation between depression angle and tremolo amplitude is the same.

In the bending mode, the upper and lower limit values of the bending tone can be customized by the player, and the setting range is as follows: the upper limit value is not higher than one large 2 degrees of the original sound, the lower limit value is not lower than one large 2 degrees of the original sound, when the position of the current musical instrument changes to form an elevation angle, the bending tone is gradually increased, and when the upper limit value is reached, even if the elevation angle formed by the position of the musical instrument changes to be larger, the tone is not increased any more; when the current instrument position changes to form a depression angle, the pitch of the bending sound gradually decreases, and when the lower limit value is reached, even if the depression angle formed by the instrument position changes is further large, the pitch is not further decreased. In this bending mode, it is determined whether the angle formed by the current instrument position change is an elevation angle or a depression angle, which is determined with respect to the previous instrument position.

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

If the control circuit board 7 detects a long-sounding blow, the tremolo mode is determined to be started, the position of the current musical instrument is determined to be the starting position, and the current sound is regarded as the original sound;

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

The following describes a specific tremolo or curved-sound control process, and does not represent a specific position limitation, nor does it represent a control manner in which a player can realize a tremolo or curved-sound amplitude only by continuously blowing a long sound, or can set a tremolo or curved-sound amplitude as desired.

Control of tremolo or cursory:

as shown in fig. 8, specifically:

(1) If the player continuously plays a long sound, the tremolo mode is started at the moment, and if the long sound is disconnected, the tremolo mode is ended;

in the tremolo mode, when the air pressure sensor 5 detects a sound head and blows a long sound, a command is sent to the control circuit board 7, the control circuit board 7 determines that the current blowing tone is the 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 continue blowing the long sound, and the three-dimensional space position detection module 35 detects that the electronic musical instrument is changed to the position 2 and sent to the control circuit board 7, at the moment, the position 1 and the position 2 generate angle differences to form an elevation angle, the control circuit board 7 determines the magnitude of the elevation angle, the magnitude of the tremolo is determined, the larger the angle of the elevation angle is, the larger the magnitude of the tremolo is until the set maximum elevation angle is reached, and at the moment, the magnitude of the tremolo is also maximum; conversely, the smaller the angle of elevation, the smaller the amplitude of the tremolo; and the process is controlled in real time, if the player always blows the long-range sound, the amplitude of the tremolo is larger and larger in the process of changing the musical instrument from the position 1 to the position 2, and the tremolo amplitude is reduced from the position 2 to the position 1 and returns to the tone at the position 1, so that the amplitude of the tremolo can be controlled by the player rather than a fixed amplitude; if the player is interrupted in long-range during performance, exiting the tremolo mode; until the control circuit board 7 detects a long sound again, the three-dimensional space position detecting module 35 detects and sets a new starting position again, and performs the same procedure as described above. The position of the starting point is not a fixed spatial position but is changed according to the change of the somatosensory position of the player during the performance.

Similarly, the pitch control principle is the same as the elevation control operation principle described above, except that the tremolo amplitude is larger and smaller from position 3 to position 1 in the course of changing from position 1 to position 3.

When the instrument changes beyond position 2/position 3, the tremolo amplitude is no longer changed, while the amplitude at position 2/position 3 is maintained.

In this embodiment, since a certain amount of shake exists when a person holds the instrument during the playing process, in order to avoid starting the tremolo mode due to small-range shake of the instrument, the embodiment sets a starting angle (A1, B1) generated by up-and-down shake relative to the starting position, and the tremolo mode is started only when the instrument moves upwards or downwards by an angle greater than the starting angle (A1 or B1); and during the blowing, if the instrument returns to the range of the start angles (A1, B1), the tremolo mode is turned off.

As shown in fig. 9, the angle between the position 1 and the position A1 (angle a) and the angle between the position 1 and the position B1 (angle B) are initial angles, and the initial angles can be set by the player himself/herself, and the setting range of the error angle in the present embodiment is 0 to 20 degrees.

(2) The turn-on of the up and down bending tones is the same as the principle of the tremolo mode, and specifically includes:

If a player presses down 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 original sound and the starting position of the musical instrument at this time; if the finger leaves the bend switch key 34, the bend mode is turned off. Thus, the original sound obtained in each bending mode is related to the current tone when the bending switch key 34 is pressed.

In the bending mode, the bending mode is divided into an up bending mode and a down bending mode, and when the position of the musical instrument changes, the change is controlled to be tone.

In this embodiment, as shown in fig. 10, during the playing, the control of rising of the pitch of the kick tone is realized when the instrument is changed from position 1 to position 2, the control of lowering of the pitch of the kick tone is realized when the instrument is changed from position 2 to position 1, the control of lowering of the pitch of the kick tone is realized when the instrument is changed from position 1 to position 3, and the control of rising of the pitch of the kick tone is realized when the instrument is changed from position 3 to position 1, and the specific pitch change rule is related to the above setting parameters.

Upturning sound function: when the bending switch key 34 is pressed, the control circuit board 7 detects the start position 1 and the current playing tone, and changes the position 1 of the electronic musical instrument to approach the position 2, the tone gradually rises at this time, and when the tone reaches the set maximum value, the current musical instrument position does not rise any more even if it approaches the position 2 again or exceeds the position 2. When the tone gradually falls back from position 2 to position 1, the tone gradually falls back to position 1.

Downbending function: when the bending switch key 34 is pressed, the control circuit board 7 detects the starting point position 1 and the current playing tone, if the long tone continues to be played at this time, and changes the position 1 of the electronic musical instrument to approach the position 3, the tone gradually decreases at this time, and when the position 3 is reached or exceeded, the tone is reduced to the lowest value and does not change any more. The tone gradually rises from position 3 back to position 1, and the tone gradually rises back to position 1.

As shown in fig. 11, the correspondence between the change in the instrument up/down angle and the change in the up/down bending tone is illustrated.

As shown in the figure, the positive half axis of the Y-axis is the up-bending tone adjusting area, the tone changing range is from the original tone to 2 degrees higher than the original tone, (2 degrees higher than the original tone is the limit value of the up-bending tone, and can be defined by a player in the range), deltay is the changing amount of each tone increasing/decreasing adjustment, and the changing amount can be defined by the player, and the size of Deltay value determines the tone increasing/decreasing speed, the larger the value is, the larger the slope of the straight line is, the faster the tone changing speed is, and the smaller the value is, the smaller the slope of the straight line is, and the slower the tone changing speed is. The X-axis is the number of changes of the position of the musical instrument, and the three-dimensional space detection module detects the elevation angle or the depression angle generated at the moment once, if the elevation angle is the elevation angle, the current tone=the current tone + & delta y, and if the depression angle is the depression angle, the current tone=the current tone-delta y. The initial value of the current tone is the original tone.

Similarly, the negative half axis of the Y axis is the down-bending tone adjustment region, the tone change range is 2 degrees larger from the original tone to the lower original tone, (2 degrees larger than the lower original tone is the limit value of the down-bending tone, and can be defined by the player in this range), Δy is the change amount of each tone increase/decrease adjustment, and this change amount can be defined by the player, and the magnitude of Δy value determines the rate of tone increase/decrease, the larger the value is, the larger the slope of the straight line is, the faster the rate of tone change is, and conversely the smaller the value is, the smaller the slope of the straight line is, and the slower the rate of tone change is. The X-axis is the number of changes of the position of the musical instrument, and the three-dimensional space detection module detects the elevation angle or the depression angle generated at the moment once, if the elevation angle is the elevation angle, the current tone=the current tone + & delta y, and if the depression angle is the depression angle, the current tone=the current tone-delta y. The initial value of the current tone is the original tone.

The embodiment needs to be described as follows: the kick-up tone and the kick-down tone cannot be generated simultaneously, but can smoothly transit, for example, the kick-down switch key 34 is pressed all the time in the whole playing process, then the tone falls back to the position 1 from the position 2 and falls back to the position 3 again in the process, the tone falls back to the tone at the starting point from the highest, and the tone rises again to the highest tone when the electronic musical instrument rises from the lowest tone to the starting point from the position 3 to the position 1 and then to the position 2.

In this embodiment, as shown in fig. 10, since the starting angle (A2, B2) generated by the up-and-down shake relative to the starting position is also set in the present embodiment in order to avoid the start of the bending mode and the determination of the original sound due to the small-scale shake of the instrument during the playing process, the up/down bending is started only when the instrument moves up or down by an angle greater than the starting angle (A2 or B2); but during the blowing, the up/down bending tone is not turned off as long as the bending tone switch key 34 is pressed all the time.

In this embodiment, the angle of the initial angle of the bending sound can be customized by the player, and the range of the angle is 1-20 degrees.

In this embodiment, the variation Δy of the tone increase/decrease is adjusted each time, and can be customized by the player in the range of 1% to 50% of the original tone.

In this embodiment, the starting position of the tremolo mode is fixed, and the starting position will always be that position as long as other notes are not changed or the breath of the blow is constant. The starting position of the bending mode may be changed continuously, and the bending start position is redefined once each time the position of the instrument is changed or the bending switch key 34 is pressed again. The body-sensing tremolo is controlled by the angle during playing, and the body-sensing tremolo 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, an outlet end of the air hole conversion device 3 is connected with an air inlet of the air-water separation device 4, and an air outlet end of the air-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 case reinforcement member 33 is provided on the outer surface of the case near the mouthpiece 2 to fit the shape of the case in order to make the whole electronic musical instrument structure more firm.

The gas-water separation device 4 separates water and vapor of the gas blown by the player, the separated water and vapor flows out from the water outlet 6 through the water outlet end of the gas-water separation device 4, the separated gas is transmitted to the gas pressure sensor 5 through the air outlet of the gas-water separation device 4, the gas pressure sensor 5 determines the current gas pressure and feeds back to the control circuit board 7, the control circuit board 7 converts the received gas pressure value into an audio command and transmits the audio command to the multi-channel audio sounding chip, when the multi-channel audio sounding chip receives the corresponding command, different sound volumes, tone and special effect sounds can be emitted, the sound volume is determined by the gas pressure blown by the player, and the larger the blown gas pressure is, the smaller the blown gas pressure is, and the smaller the sound volume is.

In the embodiment, the gas-water separation device 4 is a Y-shaped three-way hose and comprises 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 arrangement of the structure is convenient for separating the gas from the water, and discharging the separated water vapor to ensure the drying of the inside of the electronic musical instrument, thereby prolonging the service life of the electronic musical instrument.

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

The note keys 8 are matched with the key public end keys 9, the note keys 8 are all signal input ends, one hand of a player needs to press the key public end keys 9 for a long time, the other finger presses the note keys 8 at will, a human body is used as a conductor, current signals flow from the key public end keys 9 to the touched note keys 8, and when the note keys 8 are not touched, the state is in a low level; when the note button 8 is touched, the state is changed from low level to high level, at this time, the control circuit board 7 can detect the corresponding high level and then convert the corresponding high level into a corresponding audio command to be sent to the multi-channel audio sounding chip in the format of MIDI communication protocol, when the multi-channel audio sounding chip receives the command, different tone, tone and special effect sound can be sent out, and the MIDI communication protocol can control a plurality of channels in the multi-channel audio sounding chip simultaneously in the coding mode.

In this embodiment, the note keys are arranged in two groups, and each group has 4 note keys 8, so that the design of this structure is convenient for players to better coordinate the use of the other 4 fingers to press the note keys 8 except the thumb during playing, and enhance the use feeling of the musical instrument.

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

The drum switch key 10 is set in such a way that long-time pressing of the drum switch key 10 can switch to the drum playing mode, and long-time pressing of the drum switch key 10 again can switch to the audio playing mode. The player switches the drum switch key 10 to switch between the drum playing mode and the audio playing mode, and in the audio playing mode, the note key 8 is a normal note key and is an electronic wind instrument, such as a clarinet tone electronic instrument. In the electric drum playing mode, the note keys 8 become keys of the percussion music, and the player plays the corresponding sound by pressing the note keys 8 with fingers, and simultaneously the player controls the volume of the drum through breath, so that the effect of the drum 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 range, and a player can select to press the corresponding overtone key 13 according to performance requirements; in this embodiment, 5 consecutive overtone keys 13 are provided, which are respectively upper bass, midrange, treble and superhigh, and the range of each range is 8 degrees. A 5 gamut height switch can be achieved in the audio performance.

In this embodiment, if switching to the electric drum performance mode, the following situations are included:

when the drum is flicked, that is, a player flicks the note key 8 and presses any one of the bass, midrange and treble keys of the overtone keys simultaneously, only a sound can be made, and if the enabling key of the drum is opened, a certain key of the special effect sound needs to be pressed simultaneously. The volume is determined by the set volume parameter in the parameters, and the volume is a fixed value and the drum volume is unchanged.

If the player plays at the moment, the player changes the playing volume at the moment on the basis of the playing of the drum, and the volume is determined by the calculation result of the set volume plus the air quantity; the breath value is a variable which is changed by the variation of the breath size of the player; the air quantity is an amplification factor and is set by a player; the volume of the drum sound is variable at the time of blowing the drum, and also varies with the size of the breath of the player.

In this embodiment, the touch enabling switch (the drum switch key 10) of the drum must be turned on whether the drum is a blowing drum or a flicking drum; configuration parameters in drum mode, volume range is 10-127; gas amount: 1-10; reverberation: 0-127. The arrangement of the structure solves the problem that the existing electronic wind instrument has no percussion feeling in actual playing, and the increased flick keyboard mode of the embodiment enables players to find the pleasant feeling of the percussion drum.

In this embodiment, at most three groups of percussion keys can be set, and each of the three groups of percussion keys is formed by combining 3 keys of "high-pitched", "medium-pitched", "low-pitched" and 8 note keys 8 in the back harmonic key 13 of the musical instrument, so that 24 percussion keys can be combined in total. Each note button can be provided with a percussion music, which is set by a player; when one of the 3 keys of the high-pitch, middle-pitch and low-pitch is pressed, the percussion keys can be flicked again to emit percussion sounds, a plurality of percussion keys can be flicked simultaneously in the same group, a plurality of percussion sounds can be emitted simultaneously, and at most 8 percussion sounds can be emitted simultaneously; in this embodiment, there are 47 kinds of choices of percussion music, in which a player sets a percussion music corresponding to each note key by himself, and the method for changing parameters is the same as the method for changing audio mode by setting the key by the function pad 16 described below.

The functions of the electric drum switch key 10 are: after the electric drum and the audio playing are switched to the electric drum mode, any special effect sound key 18 can be selected as an enabling switch key, the enabling function can also be closed, and when one special effect sound key 18 is started and selected as the enabling switch key, the enabling switch key is pressed normally to play in the electric drum mode, so that the sound can be emitted. If this enabling function is turned off, the drum can make a sound without pressing the effect key 18 at the time of performance.

In this embodiment, the fast switching key 11 and the fast up-regulating key 12 are electrically connected with the control circuit board 7 and arranged on the casing 1; the quick switching key 11 can quickly switch the already set shortcut parameters; the quick raising key 12 is used to quickly raise the tone during performance.

In this embodiment, the control circuit board 7 is further provided with a vibration motor, when the control circuit board 7 detects that any of the fast switching key 11, the fast rising key 12, the electric drum switch key 10, the fixed/variable setting key 17, the shortcut key 15, and the power switch key 19 is 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 has been successfully switched without stopping to see the parameters on the liquid crystal display, thereby improving the performance operation efficiency.

The shell 1 is also provided with an OLED liquid crystal screen 14, a shortcut key 15, a function keyboard 16, a fixed tone/variable tone 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 OLED lcd screen 14 may display current system parameter status such as tone, pitch, gamut, shortcut numbers (1-6) being used, current power (5 grid display), charge status, harmony function, whether the drum function is enabled, tone magnetic values, and key/key status.

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

In this embodiment, the shortcut key 15 may set shortcut parameters as tone, pitch, gamut, fixed/variable, harmony 1, harmony 2 corresponding to the 8 note touch keys 8; wherein the harmony parameter settings include harmony volume, harmony color and harmony sound, which can be set as shortcut parameters.

In this embodiment, in addition to the shortcut parameters being switched by the number keys 1-6 (shortcut key 15), the shortcut parameters can be switched by the shortcut key 11, the shortcut key 11 is switched sequentially, for example, 1 to 2,2 to 3, or 3 to 2,2 to 1, and the shortcut key 15 is switched in the order or reverse, and the shortcut keys 15 can be switched by jumping between 1-6.

When the shortcut is stored or switched, the internal vibration motor vibrates to be used as a confirmation prompt.

As shown in fig. 13, the functional keyboard 16 includes 6 keys of "enter", "exit", "up", "down", "add" and "subtract", if the current audio playing mode is currently in use, pressing the "up" key alone can raise the current tone, pressing the "down" key alone can lower the current tone, pressing the "add" key alone can increase the tone color number, pressing the "subtract" key alone can reduce the tone color number, the tone color number is 128 in total, and different tone color numbers represent different tone color names; long pressing of the "back" key may display the tone name corresponding to the current tone number. Pressing the enter button alone will enter into the system parameter setting, and in the system parameter setting process, the parameter setting can be adjusted by the enter, exit, up, down, add, subtract buttons. The 'back' button is pressed independently, the system parameter setting can be exited, and the audio playing interface is returned. Wherein, the system parameter setting includes:

(1) And (3) key pressing: 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 key filtering parameter adjusting range is 1-10, and the corresponding filtering time is 5-50 milliseconds.

(2) The finger method is as follows: the current audio playing mode can be switched to be saxophone fingering or flute fingering.

In this embodiment, the set 8 notes touch the key, and different notes of 12 tones can be generated through different combinations, and the notes of each tone include: "1, #1/b2, #2/b3, 4, #4/b5, #5/b6, #6/b7, 7", the electronic musical instrument is provided with two common fingering methods, and each common fingering method comprises a plurality of alternative fingering methods. Specifically, as shown in the following table, the note key 8, the fast switch key 11, the special effect key 18 and the overtone key 13 are set on the casing 1 in different playing modes, wherein ∈ is implemented to indicate that the finger is pressed, o indicates that the finger is not pressed, and the number of overtone keys is 5 in total, and only one key can be pressed at the same time.

TABLE 1 saxophone fingering one

TABLE 2 saxophone finger two

Watch 3, flute fingering plot three

Musical notes

1

#1

2

#2

3

Quick switching key

○

Specific sound key

○

Note key

●

○

Note key

●

○

●

Note key

●

○

Note key

○

●

○

●

○

Quick switching key

○

Specific sound key

○

Note key

○

●

○

●

○

Note key

○

●

○

●

○

●

Note key

○

Note key

○

Overtone key

●

Watch 4, flute fingering diagram four

(3) Gas amount: the range of the parameter is 0-20, when the air quantity value is 0, the air mode is adopted at the moment, blowing is not needed, only the note button can sound, but the volume cannot be controlled in the air mode, when the air quantity value is more than 0, the air quantity value represents the minimum air sound value, for example, when the air quantity value is 5, the air quantity value is in the air mode, the air quantity must be more than 5 to blow, and the air quantity is less than 5 to not sound. The volume can also be controlled by the air volume in the blowing mode.

(4) Volume size: the breath amplification can be set so as to control the volume during playing. The range of the air pressure sensor used in this embodiment is 0-5kPa, and this range corresponds to 0% -100% of the total volume, so that the total volume is maximum when the air pressure value is maximum, and the mute state is assumed when the air pressure value is 0, but because the air pressure value is different from each other, it is possible that a person who wants to blow the air pressure value to the full range can take a lot of air pressure, so that an amplification factor is cited here, and it can be seen in the above correspondence 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%, and when the air pressure value is 0, when the air pressure value is 1, the volume is 40%, and when the air pressure value is 2, the range of the air pressure sensor is 0-2.5kPa, the corresponding total volume is 0% -100%, assuming that the amplification factor (i.e., the value of the volume parameter) is 2. So that half of the effort can be saved to make the volume reach 100%.

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

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

(7) Screen protection: after the key is started, when the functional 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 no-operation state reaches the set time, the OLED liquid crystal display screen is turned off. At this time, any key on the functional keyboard can be re-pressed, the OLED liquid crystal screen can be lightened, the function can be closed, and when the screen protection function is closed, the OLED liquid crystal screen is always lightened.

(8) MIDI: when the MIDI function is turned on, 16 MIDI channels may be set for controlling external hard audio sources. When the function is started, the OLED liquid crystal display screen displays the MIDI starting state and the MIDI channel number in the channel range 1-16. This function may be turned off.

(9) Sound volume: the settable harmony volume is a percentage of the master volume. The range is 1% to 100%, if 100%, the volume will be as large as the volume of the main sound.

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

(11) Sound tone: it is possible to set whether the tone of the sum sound is the same as the main tone or different by a few degrees, and the setting range is-7 to + #1.

(12) Tremolo switch: 0: closing; 1: qi tremble; 2: angular trembling; 3: a gas angle;

0: when the tremolo function is off, there is no tremolo at this time.

1: when the breath tremolo function is turned on, tremolo can be generated by the magnitude of the breath, and the larger the breath is, the larger the amplitude of the tremolo is, the smaller the breath is, and the smaller the amplitude of the tremolo is.

2: when the angle tremolo function is on, the tremolo amplitude can be controlled by the somatosensory.

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

(13) Multiple of: the range is 1-20, defaulting to 3. The meaning of this parameter is: the amplification of the tremolo parameter amplitude is used.

(14) Gas zone: the range is 10-127, 30 by default. The meaning of this parameter is: if the value is 30, the variation interval representing the variation value of the tremolo amplitude is 0-30.

(15) And (3) starting the angle: ranging from 1 to 20, defaulting to 2, this function is the onset angle of the somatosensory tremolo and the somatosensory curvophone.

(16) Angle: the range is 0-100, defaulting to 30, and this function is to set the upper limit of the body-sensing tremolo elevation/depression angle change.

(17) Rising tone: the range is from a small 2 degrees to a large 2 degrees. The meaning of this parameter is: when the quick up key 12 is pressed, a small 2 degree or a large 2 degree tone can be quickly raised.

(18) And (3) fast cutting: there are two modes: the parameter ranges from 0 to 6,0 being the first mode and 1 to 6 being the second mode. As shown in fig. 14, the first mode is a key combination mode, when the quick switch key 11 is pressed simultaneously with the key (4) in the note key 8, the current shortcut number will be increased, such as 1, then switch to 2, if 6 will switch to 1, i.e. 1-6 cycles, when the quick switch key 11 is pressed simultaneously with the key (2) in the note key 8, the current shortcut number will be decreased, such as 2, then switch to 1, if 1 will switch to 6, i.e. 6-1 cycles. Second mode: the cycle increment switching mode can only be 1 to 2,2 to 3, and can only be incremented, and the current shortcut number can be set, for example, the set shortcut number is 3, and the cycle is incremented from 1 to 3. This mode can be triggered by pressing the fast switch button 11 alone, without the need for a combination button.

Fixed tone/variable tone setting key 17: if the shortcut parameter is a fixed tone, the set shortcut key (comprising the shortcut key 15 and the quick switching key 11) is pressed, parameters of the set tone, the tone area and the like in the shortcut key are directly read, and if the shortcut parameter is a variable tone, the set shortcut key is pressed, and only the parameters of the set tone, the tone area and the like are switched to, so that the current tone is not changed. The tuning/tuning 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 set as any one of the plurality of special effect sound keys 18; in this embodiment, 5 special effect sound keys are set, which are touch keys, and can be used for performing 5 special effect sound functions of tongue, upper bending sound, lower bending sound, sliding sound and body bending sound, wherein the 5 special effect sounds can be set to corresponding operation keys according to the operation habit of a user, and the bending sound switch key 34 can be set to any one of the 5 special effect sound keys; each special effect sound key is an independent switch control key; wherein,,

flower tongue function: the flower tongue playing skill is simulated by software, and the flower tongue sound breaking speed can be set by software, wherein the sound breaking speed is 2-50ms.

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

Sliding sound function: the sliding function on the multichannel 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 sound: 1-127.

Somatosensory bending function: the body sensing bending sound function on the multichannel audio sounding chip can be triggered through the body sensing function, and the sliding speed of the body sensing bending sound can be set through software. Sliding speed of somatosensory bending sounds: 1-50.

Somatosensory bending upper limit value: 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 button 19: the power switch adopts a silent silica gel button, and can be started or shut down by long-time pressing of the power switch.

A setting key 20 for setting a player's limit value of change of the elevation/depression angle, on/off harmony, sonic magnetic values, system parameters, shortcut keys, performance fingering switching, special effect key functions, etc., according to the requirement;

the method comprises the following steps:

Shortcut key 15 settings: by setting the key 20 in combination with the shortcut key 15 (keys 1-6) the set parameters (tone, pitch, gamut, pitch/transposition, harmony 1, and harmony 2) can be quickly saved to the corresponding keys.

And sound shortcut key settings: the set key 20 in combination with the "add" key may activate or deactivate the function of harmony 1 and the set key 20 in combination with the "subtract" key may activate or deactivate the function of harmony 2.

Tone magnetic value setting: the key 20 and the 'enter' key combination are arranged, the tone magnetic value can be increased, and the key 20 and the 'exit' key combination are arranged, so that the tone magnetic value can be reduced. The magnetic setting is to make the sound softer and more magnetic by software, and the setting range is 0-127.

When the set button 20 is pressed in combination with the "drum" button, the drum parameter setting interface may be entered. The volume of the current drum, the percussion parameters corresponding to each key of the drum, etc. can also be operated by the "enter", "exit", "up", "down" keys of the function key pad 16.

When the setting button 20 and the power switch button 19 are pressed simultaneously, after a delay of 20 seconds, the system is restarted, and the factory setting is restored, so that all parameters are restored to default parameters in factory.

In this embodiment, the functions of the drum switch key 10 are: after the electric drum and the audio playing are switched to the electric drum mode, any special effect sound key 18 can be selected as an enabling key, the enabling function can also be closed, and when one special effect sound key 18 is started and selected as the enabling key, the enabling key is pressed for a long time to play in the electric drum mode, so that a sound can be emitted. If the enabling function is turned off, the drum can make a sound without pressing the effect key 18 during performance, and the enabling key functions are: false triggering is prevented.

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 earphone interface 21: the standard 3.5 earphone output interface is adopted, so that 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 of the standard MIDI communication protocol is supported, and three wires, namely a ground wire, a data wire and a direct current 5V power supply, are contained in the MIDI output interface. Asynchronous serial communication is adopted during transmission, and the standard communication baud rate is 31.25× (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 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 this embodiment: a 6.35 binaural interface was used. The interface can be directly connected with an audio input interface of an external power amplifier or directly connected with a microphone input interface. The embodiment adopts multi-channel audio output, and can simultaneously output multiple channels at the same time; different audio channels can generate different tones, so that the harmony effect can be generated, the harmony problem is solved, and the combination of different tone colors generated by different channels can create new tone colors. And the sound effect is that for example, the channel 1 is C-tone "Duo", the channel 3 is C-tone "Mi", when two channels sound at the same time, the sound effect can be generated, the tone of the two channels can be different, and the hearing effect is different. Self-innovation tone color effect: channel 1 is "Duo" and channel 3 is "Duo" and when two channels are sounding at the same time, if the timbres of the two channels are different, a new timbre will be produced.

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

the upper layer key detection circuit board 25 is respectively and electrically connected with the note key 8, the quick switching key 11, the quick rising tone key 12 and the two special effect tone 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 top surface in the shell 1 through the note key 8, the quick switch key 11 and the two special effect sound keys 18.

The plurality of 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 on the lower inner bottom surface of the shell 1 from left to right;

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 circuit board 27 is electrically connected with the fixed tone/variable tone setting key 17, the key public end key 9, the shortcut key 15, the special effect tone key 18, the electric drum switch key 10, the setting key 20 and the 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 layer 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 through pins, and when the note key 8, the quick tune-up key 12, the special effect key 18 and the quick switch key 11 are touched/pressed, the control circuit board 7 can detect the signal of the touched/pressed corresponding key.

When the function key 16 on the first lower circuit board 26 is pressed or the overtone key 13 is touched, the control circuit board 7 may detect a signal to press/touch the corresponding key.

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

The air pressure sensor 5 on the first lower circuit board 26 can transmit the air pressure to the control circuit board 7 in a digital form, the control circuit board 7 combines the data transmitted by the air pressure sensor 5 with the detected key information, sends the combined command to the multi-channel audio sounding chip on the control circuit board 7 so as to generate different timbres and tones, and simultaneously directly sends the combined command to the MIDI output interface on the third lower circuit board 28 so as 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 point-connected to the power management circuit, the power management circuit includes lithium battery power detection, lithium battery charging and protection, power boosting and voltage reduction management, and power on/off management, and since the lithium battery is 3.7V-4.2V power supply and the MIDI output interface is 5V power supply, the battery voltage is boosted to 5V and then output, and the internal chip is 3.3V working voltage, the battery voltage needs to be reduced to 3.3V and then supplied to the internal chip.

In this embodiment, the control circuit board 7 adopts a 32-bit ARM processing chip, and the chip has 64 pins, including a pin interface for IIC, SPI, UART three communication protocols, a plurality of universal input/output (IO) ports, and a plurality of analog signal acquisition interfaces, where the voltage acquisition range of the analog signal acquisition interfaces is 0-3.3V. Wherein,,

IIC pin: the pin is directly connected with the IIC pin of the air pressure sensor detection chip, so that the air pressure value detected by the air pressure sensor can be fed back to the core control CPU in real time 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 the 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 for display after being processed.

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 format of MIDI communication protocol, when the multi-channel audio sounding chip receives the command, different tone, tone and special effect sound can be sent out, and the volume can be controlled. 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 this embodiment, the plurality of note keys 8, the overtone key 13, the fixed/variable setting key 17, and the plurality of special effect 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 amplifying 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 the signal passing through the human body is very weak, a signal amplifying circuit is connected to each touch key, and the signal can be detected by the control circuit board 7 after passing through the signal amplifying circuit.

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

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

when the Y-axis position of the three-dimensional space detection module changes, the OUT pin of the module can be sent OUT in a voltage form, at the moment, the voltage of the pin is collected through an analog input pin of a CPU chip and converted into a digital signal, the digital signal is calculated with internal parameters, and finally the result is converted into a MIDI communication protocol and sent to an audio sounding circuit, and at the moment, the audio sounding circuit can generate a bending sound effect. The process is not delayed, so the user can experience that the bending sound is controlled by the user in real time.

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

the front side of the shell 1 is provided with 8 note keys 8, two groups of 4 note keys 8 are respectively arranged, the left side of the first group of note keys 8 is respectively provided with a special effect sound key 18 and a quick switching key 11, and the left side of the second group of note keys 8 is respectively provided with a special effect sound key 18 and a quick rising key 12; the key 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 adjacent keys through the key contact surface during playing; similarly, the effect keys 18 may be provided in different sizes or shapes for convenience of the player in performing.

The arrangement of the center axis symmetry structure solves the problems that the left hand and the right hand of the 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 flute, cucurbit flute and the like are center axis symmetry in China, and for a plurality of people who have habitually used and anti-held the musical instrument (the left hand is used for holding the musical instrument with the right hand at the upper part and the left hand is used for holding the musical instrument with the lower part), no method is adopted for adapting the hand positions of the existing electronic musical instrument, so the center axis symmetry structure is convenient for the left hand and the right hand of a player to be interchanged without influence. The music instrument fan is suitable for music instrument fans, and meanwhile, the requirements of specific people can be met, so that the music instrument fan is more humanized.

The setting of casing 1 back button from left to right distributes in proper order and does: the device comprises an OLED liquid crystal screen 14, a function keyboard 16,5 overtone keys 13, a fixed tone/variable tone setting key 17, two symmetrically arranged special effect sound keys 18, a key public end key 9 arranged in the two special effect sound keys 18, a quick switching key 11, a setting key 20, a drum switch key 10 and a power switch key 19 which are arranged in a triangular manner, an earphone output interface 21 and a MIDI output interface 22; the key public end key 9 is provided with an integrated special effect sound key 18 up and down, and the key 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 downwardly extended on two sides of the 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 keys on the protection back of the musical instrument;

the key public end key 9 is opposite, and the shell 1 is provided with a group of note keys 8 on the front face, so that when a player thumb presses the key public end key 9, 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 the instrument stably.

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

In this embodiment, a power supply device is disposed on the left casing 1 of the tuning/pitch setting button 17, and includes a battery case 31 for storing lithium batteries and lithium batteries.

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

A power supply charging and system upgrading interface 23, an audio output interface 24 and a water outlet 6 are arranged on the tail end surface of the shell 1; the water outlet end of the gas-water separation device 4 is connected with the water outlet 6 in a conduction way 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 a hose.

The invention has the beneficial effects that:

(1) According to the invention, through the tremolo switch, the bending switch and the three-dimensional space position detection module which are matched, a player generates tremolo or bending sound in a body sense mode, exercise is not needed, tremolo or bending sound effects needed by the player can be achieved, a certain degree of rhythmicity is achieved, the player is more closely attached to musical instruments and music, and playing fun is realized.

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

(3) According to the invention, through the set electric drum switch keys, the switching between the electric drum playing mode and the audio playing mode can be realized, the electric drum playing mode is a mode of playing the keys with fingers, and the volume of the drum can be controlled by using breath in the playing process, so that the effect of the drum in playing is more expressive. At the same time, the tone colors of a plurality of percussion music can be emitted, the effect of the drum kit can be formed, and the user can set each key to be different percussion music according to personal playing habits and playing needs.

(4) The invention is designed in a mode of axisymmetric, and players can exchange left and right hands without influence when pressing keys, thereby being suitable for musical instrument lovers, meeting the requirements of specific crowds and being more humanized.

The present invention is not limited to the above-described preferred embodiments, and any person who is informed of structural changes made under the teaching of the present invention should fall within the scope of the present invention, regardless of whether the technical solution is the same as or similar to the present invention.

Claims

1. An electronic musical instrument for controlling tremolo and cursory through somatosensory, comprising: a housing (1); a control circuit board (7) fixedly arranged in the shell (1) and a power supply device thereof; 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 voice 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 is electrically connected with the control circuit board (7) for detecting the current position and the changed position of the musical instrument and determining the change of the elevation/depression angle of the musical instrument, so that the tremolo opening and the amplitude/tone control of the tremolo/curved sound are realized;

If the three-dimensional space position detection module (35) detects the change angle as an elevation angle and determines the elevation angle, the control circuit board (7) controls the tremolo tone to change by a preset amplitude value and controls the upturned tone to rise by 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 by a preset amplitude value and controls the downbend tone to reduce a preset tone;

if the control circuit board (7) detects that the long sound is played, the tremolo mode is determined to be started, and the current sound is determined to be the original sound;

if the player receives that the bending 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.

2. The electronic musical instrument for controlling tremolo and curvedly sound by somatosensory according to claim 1, wherein the initial position of the instrument at the initial moment of playing is set as the initial position, and the position change of the instrument based on the initial position is automatically detected and identified by the three-dimensional space position detection module (35), namely, when the playing position of the instrument is higher than the initial position, an elevation angle is formed; when the play position is lower than the start position, a depression angle is formed.

3. An electronic musical instrument for controlling tremolo and curvedly by somatosensory according to claim 2, characterized in that the starting position of the tremolo is the initial position confirmed as the instrument when the control circuit board (7) detects the instrument blowing a long sound;

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

4. An electronic musical instrument for controlling tremolo and curved sound by somatosensory according to any one of claims 1-3, characterized in that a limit value of elevation/depression angle variation is set;

5. An electronic musical instrument for controlling tremolo and curved sound by somatosensory according to any one of claims 2 or 3, characterized in that a start angle (A1, B1) is provided which is generated by dithering up and down with respect to said start position;

6. An electronic musical instrument for controlling tremolo and bending by somatosensory according to any of claims 2 or 3, characterized in that a starting angle (A2, B2) is provided which is created by up-and-down shaking relative to said starting position, the up/down bending being turned on when the instrument is moved up or down by an angle greater than the starting angle.

7. An electronic musical instrument for controlling tremolo and curved sound by somatosensory according to claim 1, characterized in that said casing (1) is also provided with an OLED liquid crystal screen (14) electrically connected to said control circuit board (7) and with a setting key (20);

the OLED liquid crystal screen (14) can display the current system parameter state of the musical instrument, wherein the current system parameter state is the tremolo and bending-on state which are in use, the limit value of the elevation angle/depression angle of the tremolo/bending, the tone, the gamut, the current electric quantity, the charging state and the tone magnetic value;

the setting key (20) is used for setting limit values including elevation angle/depression angle control conditions, elevation angle/depression angle change, on/off harmony, sonic magnetic values, system parameters, performance fingering switching and special effect sound key functions.

8. An electronic musical instrument for controlling tremolo and bending by somatosensory according to any one of claims 1-3, characterized in that a plurality of effect keys (18) connected to the control circuit board (7) are further provided on the casing (1), and the bending key (34) is provided as any one of the plurality of effect keys (18).