阅读说明：本技术 一种交互式电子扬琴及交互方法 (Interactive electronic dulcimer and interaction method ) 是由 张达林 于 2019-02-21 设计创作，主要内容包括：本发明公开了一种交互式电子扬琴及交互方法,该电子扬琴包括若干套交互模块,若干个信号处理器和输出模块,并以电信号为交互媒介的方式实现乐器之间的协调和通信；每套交互模块均由操作架和底座构成；在操作架的触摸区域上设置多个触摸传感器,在底座的上布置撞击压力传感器和敲击压力传感器；不同的交互模块对应不同的音高,相互影响的交互模块相互关联。信号处理器的输入端与上述传感器连接,输出端与输出模块连接。应用本发明提供的交互式电子扬琴及交互方法,在保留扬琴的多种传统演奏技法、技巧的基础上,比传统扬琴乐器具有更高的便携性和实用性。(The invention discloses an interactive electronic dulcimer and an interactive method, wherein the electronic dulcimer comprises a plurality of sets of interactive modules, a plurality of signal processors and an output module, and coordination and communication among musical instruments are realized in a mode of taking electric signals as interactive media; each set of interaction module consists of an operation frame and a base; arranging a plurality of touch sensors on a touch area of the operation frame, and arranging an impact pressure sensor and a knocking pressure sensor on the base; different interaction modules correspond to different pitches, and interaction modules which are mutually influenced are mutually related. The input end of the signal processor is connected with the sensor, and the output end of the signal processor is connected with the output module. The interactive electronic dulcimer and the interactive method provided by the invention have higher portability and practicability than the traditional dulcimer musical instrument on the basis of keeping various traditional playing techniques and skills of the dulcimer.)

1. An interactive electronic dulcimer is characterized in that coordination and communication among musical instruments are realized in a mode of taking electric signals as interactive media; the interactive electronic dulcimer consists of a plurality of sets of interactive modules, a plurality of signal processors and an output module; the input end of the signal processor is connected with the sensor in the interaction module; the output end of the signal processor is connected with the output module; different interaction modules correspond to different pitches, and interaction modules which are mutually influenced are mutually related;

each set of interaction module consists of an operation frame and a base; the operating frame comprises an operating part, and a knocking hammer and a vertical rod which are respectively fixed at the bottoms of two ends of the operating part; the operation part is divided into two areas, namely a knocking area and a touch area, and a plurality of touch sensors are arranged on the touch area;

the base comprises a bottom plate, and an impact plate and a supporting seat which are respectively fixed at the upper parts of two ends of the bottom plate; the two impact plates are respectively and correspondingly arranged and are perpendicular to the bottom plate; an impact pressure sensor is arranged on the inner wall of each impact plate, and a knocking pressure sensor is arranged on a bottom plate between the two impact plates;

the impact plate is located below the knocking area, and the supporting seat is located below the touch area.

2. The interactive electronic dulcimer of claim 1, wherein said support base comprises a ring, a cushioning cotton, and a plurality of identical support arms; one end of the supporting arm is fixed on the bottom plate, and the other end of the supporting arm is fixed on the circular ring; the buffer cotton is placed on the circular ring, and a knocking pressure sensor is placed between the bottom of the buffer cotton and the inside of the supporting arm;

when a player uses the piano bamboo to knock the knocking area, the knocking area moves along the motion direction of the piano bamboo, so that the vertical rod below the touch area presses the buffer cotton downwards to apply pressure to the knocking pressure sensor, a knocking pressure signal is generated, and the vertical rod of the knocking hammer below the knocking area is also contacted with the knocking pressure sensor to generate the knocking pressure signal.

3. The interactive electronic dulcimer of claim 1, wherein said striking hammer is a cross-shaped structure consisting of a cross-bar and a vertical bar; when a player uses the piano bamboo to play the knocking area, the knocking area moves along the motion direction of the piano bamboo, so that a cross rod of a knocking hammer below the knocking area is in contact with the knocking pressure sensor to generate a collision pressure signal.

4. The interactive electronic dulcimer of claim 1, wherein said operating portion is of a serpentine configuration.

5. The interactive electronic dulcimer of claim 1, wherein said signal processor is connected to one or more of said interaction modules;

the signal processor is used for receiving signals generated by the sensor on the interaction module, generating a music signal instruction by combining a built-in algorithm and transmitting the music signal instruction to the output module.

6. The interactive electronic dulcimer of claim 1, wherein said output module comprises a sound synthesizer and an audio output interface;

the sound synthesizer reads the music signal instruction output by the signal processor and transmits the output sound to the audio output interface by taking a sampling sound source or a soft synthesis sound source as a sound generation mode;

the audio output interface outputs analog audio signals, and is connected with a loudspeaker or an earphone.

7. The interactive electronic dulcimer of claim 6 wherein said interactive electronic dulcimer further comprises a pedal; the pedal is connected with the sound synthesizer and used for controlling the parameter change of the sound synthesizer.

8. A method for interaction with an interactive electronic dulcimer according to any of claims 1 to 7, comprising the steps of:

collecting playing data of a player through a sensor on the interactive module and transmitting the playing data to the information processor; the playing data comprises pressure data and touch data;

the signal processor generates a music signal instruction according to the collected playing data and transmits the music signal instruction to a sound synthesizer in the output module;

and the sound synthesizer synthesizes sound according to the received music signal instruction and plays the sound through a loudspeaker or an earphone which is connected with the audio output interface in the output module.

9. The method of claim 7, wherein said method of interacting with an interactive electronic dulcimer,

when a 'low-high-low' signal appears in pressure data received by the signal processor, the signal processor outputs a note playing instruction, marks an interaction module which outputs the 'low-high-low' signal as a note playing state, records the triggering time of the current event, sets a timer, and after the time is over, the signal processor outputs a note ending instruction; the low-high-low signals are three continuous pulse signals which are respectively a low pulse signal, a high pulse signal and a low pulse signal; the low pulse signal is a pulse signal lower than a set threshold value, and the high pulse signal is a pulse signal higher than the set threshold value; the pitch of the note's pitch is determined by the interactive module struck or impacted by the player; the strength of the music note playing is calculated by the pressure generated by one or more pressure sensors triggered by the knocking or the striking of a player; wherein, the position of the player knocking or impacting is sent to the sound synthesizer, and the sound synthesizer modifies the tone according to the position;

when pulse 0 is changed into pulse 1 in the touch data received by the signal processor, the signal processor outputs a note ending instruction; the pitch at which the note ends is determined by the interactive module touched by the player.

10. The method of claim 8, wherein the method comprises the steps of:

during the performance, when the signal processor receives different pressure data, the signal processor outputs different signal instructions; the method specifically comprises the following steps:

when the current pressure data received by the signal processor is a low-low signal, the signal processor does not output any signal instruction;

when the current pressure data received by the signal processor is a low-high signal, the signal processor outputs a signal instruction for acquiring data of the next period and judges again;

when the current pressure data received by the signal processor is a low-high-low signal, the signal processor outputs a knocking signal instruction;

when the current pressure data received by the signal processor is a low-high signal, the signal processor outputs a bending sound starting instruction;

when the current pressure data received by the signal processor is a high-low signal, the signal processor outputs a bending sound ending instruction;

when the current pressure data received by the signal processor is a high-low-high signal, the signal processor outputs a signal instruction for acquiring data of the next period and judges again;

when the current pressure data received by the signal processor is a high-high signal, the signal processor outputs a bending sound ending instruction;

and when the current pressure data received by the signal processor is a high-high signal, the signal processor outputs a bending sound continuing instruction.

Technical Field

The invention relates to the technical field of musical instrument digitization, in particular to an interactive electronic dulcimer and an interaction method.

Background

Dulcimer, also known as yangqin, dui, brass wire, fan-shaped, bat-shaped, butterfly-shaped, and struck string musical instrument. The dulcimer is an essential musical instrument in the band of Chinese nation. The dulcimer is a common string-striking musical instrument in China, has extremely rich expressive force, can be played alone, ensemble or accompany for a musical instrument book, a rap and a opera, is often used as a role of 'piano accompaniment' in folk instrumental ensemble and folk bands, and is an indispensable main musical instrument. The improvement of the dulcimer is never interrupted in the four hundred years of circulation and evolution, and a plurality of new varieties are also disclosed, such as high-bass dulcimers, modulation dulcimers, zither dulcimers, electro-acoustic dulcimers and the like, in particular to electro-acoustic dulcimers. Although the tone of the traditional dulcimer is changed, the traditional electroacoustic dulcimer is limited by innovative thinking and innovative modes, so that the defects and the defects of the dulcimer are not fundamentally changed.

In recent years, some electronic dulcimers are designed and practiced by referring to the design mode and thought of the electronic dulcimer, however, the design scheme based on the electronic dulcimer forming thought can only detect the knocking playing mode of a player and generate sound according to the knocking playing mode, the rich playing modes of the dulcimer cannot be reserved, and the music expressive force of the electronic dulcimer is limited.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an interactive electronic dulcimer and an interactive method.

In order to achieve the purpose, the invention provides the following scheme:

an interactive electronic dulcimer realizes coordination and communication among musical instruments in a mode of taking electric signals as interactive media; the interactive electronic dulcimer consists of a plurality of sets of interactive modules, a plurality of signal processors and an output module; the input end of the signal processor is connected with the sensor in the interaction module; the output end of the signal processor is connected with the output module; different interaction modules correspond to different pitches, and interaction modules which are mutually influenced are mutually related;

each set of interaction module consists of an operation frame and a base; the operating frame comprises an operating part, and a knocking hammer and a vertical rod which are respectively fixed at the bottoms of two ends of the operating part; the operation part is divided into two areas, namely a knocking area and a touch area, and a plurality of touch sensors are arranged on the touch area;

the base comprises a bottom plate, and a knocking plate and a supporting seat which are respectively fixed at the upper parts of two ends of the bottom plate; the two knocking plates are respectively and correspondingly arranged and are perpendicular to the bottom plate; a knocking pressure sensor is arranged on the inner wall of each knocking plate, and an impact pressure sensor is arranged on a bottom plate between the two knocking plates;

the knocking plate is located below the knocking area, and the supporting seat is located below the touch area.

Optionally, the supporting seat comprises a circular ring, buffer cotton and a plurality of same supporting arms; one end of the supporting arm is fixed on the bottom plate, and the other end of the supporting arm is fixed on the circular ring; the buffer cotton is placed on the circular ring, and an impact pressure sensor is placed between the bottom of the buffer cotton and the inside of the supporting arm;

when a player uses the piano bamboo to knock the knocking area, the knocking area moves along the motion direction of the piano bamboo, so that the vertical rod below the touch area presses the buffer cotton downwards to apply pressure to the impact pressure sensor, a knocking pressure signal is generated, and the vertical rod of the knocking hammer below the knocking area is in contact with the knocking pressure sensor to generate the knocking pressure signal.

Optionally, the knocking hammer is a cross structure formed by a cross rod and a vertical rod; when a player uses the piano bamboo to play the striking and striking area, the striking and striking area moves along the motion direction of the piano bamboo, so that a cross rod of a striking hammer below the striking and striking area is in contact with the striking pressure sensor to generate a striking pressure signal.

Optionally, the operating portion is of a clip structure.

Optionally, the signal processor is connected to one or more sets of the interaction modules;

the signal processor is used for receiving signals generated by the sensor on the interaction module, generating a music signal instruction by combining a built-in algorithm and transmitting the music signal instruction to the output module.

Optionally, the output module includes a sound synthesizer and an audio output interface;

the sound synthesizer reads the music signal instruction output by the signal processor and transmits the output sound to the audio output interface by taking a sampling sound source or a soft synthesis sound source as a sound generation mode;

the audio output interface outputs analog audio signals, and is connected with a loudspeaker or an earphone.

Optionally, the interactive electronic dulcimer further comprises a pedal; the pedal is connected with the sound synthesizer and used for controlling the parameter change of the sound synthesizer.

A method for interaction by adopting an interactive electronic dulcimer comprises the following steps:

collecting playing data of a player through a sensor on the interactive module and transmitting the playing data to the information processor; the playing data comprises pressure data and touch data;

the signal processor generates a music signal instruction according to the collected playing data and transmits the music signal instruction to a sound synthesizer in the output module;

and the sound synthesizer synthesizes sound according to the received music signal instruction and plays the sound through a loudspeaker or an earphone which is connected with the audio output interface in the output module.

Optionally, when a "low-high-low" signal appears in the pressure data received by the signal processor, the signal processor outputs a note playing instruction, marks the interaction module outputting the "low-high-low" signal as a note playing state, records the trigger time of the current event, sets a timer, and after the time is over, the signal processor outputs a note ending instruction; the low-high-low signals are three continuous pulse signals which are respectively a low pulse signal, a high pulse signal and a low pulse signal; the low pulse signal is a pulse signal lower than a set threshold value, and the high pulse signal is a pulse signal higher than the set threshold value; the pitch of the note's pitch is determined by the interactive module struck or impacted by the player; the strength of the music note playing is calculated by the pressure generated by one or more pressure sensors triggered by the knocking or the striking of a player; wherein, the position of the player knocking or impacting is sent to the sound synthesizer, and the sound synthesizer modifies the tone according to the position;

when pulse 0 is changed into pulse 1 in the touch data received by the signal processor, the signal processor outputs a note ending instruction; the pitch at which the note ends is determined by the interactive module touched by the player.

Optionally, during the performance, when the signal processor receives different pressure data, the signal processor outputs different signal instructions; the method specifically comprises the following steps:

when the current pressure data received by the signal processor is a low-low signal, the signal processor does not output any signal instruction;

when the current pressure data received by the signal processor is a low-high signal, the signal processor outputs a signal instruction for acquiring data of the next period and judges again;

when the current pressure data received by the signal processor is a low-high-low signal, the signal processor outputs a knocking signal instruction;

when the current pressure data received by the signal processor is a low-high signal, the signal processor outputs a bending sound starting instruction;

when the current pressure data received by the signal processor is a high-low signal, the signal processor outputs a bending sound ending instruction;

when the current pressure data received by the signal processor is a high-low-high signal, the signal processor outputs a signal instruction for acquiring data of the next period and judges again;

when the current pressure data received by the signal processor is a high-high signal, the signal processor outputs a bending sound ending instruction;

and when the current pressure data received by the signal processor is a high-high signal, the signal processor outputs a bending sound continuing instruction.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

the interactive electronic dulcimer and the interactive method provided by the invention output playing signals in a digital musical instrument playing instruction format widely accepted in the digital audio field on the basis of keeping various traditional playing techniques and playing skills of the dulcimer, so that a digital synthesizer is used to achieve a wider tone color selection range and enrich the music expressive force; compared with the analog audio signal collected by a microphone, the digital playing signal can be used for carrying out more detailed and accurate analysis and processing on the playing process; and, based on the modular design of the device, when the musical instrument is transported or used, the instrument can be disassembled and a suitable number of modules can be selected as required for assembly, so as to realize higher portability than the traditional dulcimer musical instrument.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

Fig. 1 is a block diagram of an interactive electronic dulcimer according to an embodiment of the present invention;

FIG. 2 is a first schematic structural diagram of an interaction module according to an embodiment of the present invention;

FIG. 3 is a second schematic structural diagram of an interaction module according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of an interactive method of an interactive electronic dulcimer according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Fig. 1 is a block diagram of an interactive electronic dulcimer according to an embodiment of the present invention, and as shown in fig. 1, the interactive electronic dulcimer according to an embodiment of the present invention uses an electrical signal as an interactive medium to implement coordination and communication between musical instruments, and includes a plurality of sets of interactive modules, a plurality of signal processors, and an output module. The input end of the signal processor is connected with the sensor in the interactive module; the output end of the signal processor is connected with the output module; different interaction modules correspond to different pitches, and interaction modules which are mutually influenced are mutually related.

FIG. 2 is a first schematic structural diagram of an interaction module according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of an interaction module according to an embodiment of the present invention.

Referring to fig. 2-3, each set of interaction module is composed of an operation frame and a base.

The operation frame comprises an operation part, and a knocking hammer 1 and a vertical rod 2 which are respectively fixed at the bottoms of two ends of the operation part; the operation part is divided into two areas, namely a knocking area 3 and a touch area 4, and a plurality of touch sensors are arranged on the touch area 4.

The base comprises a bottom plate 5, and a knocking plate 6 and a supporting seat 7 which are respectively fixed at the upper parts of two ends of the bottom plate 5; the two knocking plates 6 are respectively and correspondingly arranged and are perpendicular to the bottom plate 5. The inner wall of the knocking plate 6 is provided with a knocking pressure sensor, and the bottom plate 5 between the two knocking plates 6 is provided with an impact pressure sensor.

The strike plate 6 is located below the strike zone 3 and the support base 7 is located below the touch zone 4.

Preferably, the knocking hammer 1 is a cross-shaped structure formed by a cross rod and a vertical rod.

The supporting seat 7 comprises a circular ring, buffer cotton and a plurality of same supporting arms; one end of each supporting arm is fixed on the bottom plate 5, and the other end of each supporting arm is fixed on the circular ring; the buffering cotton is placed on the circular ring, and a collision pressure sensor is placed between the bottom of the buffering cotton and the inside of the supporting arm.

When a player uses the piano bamboo to strike the striking area 3, the striking area 3 moves along the motion direction of the piano bamboo, so that the cross rod of the striking hammer 1 below the striking area 3 is in contact with the striking pressure sensor to generate a striking pressure signal.

When a player uses the piano bamboo to knock the knocking area 3, the knocking area 3 moves along the motion direction of the piano bamboo, so that a vertical rod of the knocking hammer 1 below the knocking area 3 is in contact with the knocking pressure sensor to generate a knocking pressure signal, and a vertical rod 2 below the touch area 4 is made to press down the buffer cotton to apply pressure to the knocking pressure sensor, so that the knocking pressure signal is generated.

The knocking pressure sensor and the impact pressure sensor can be piezoelectric ceramics, piezoresistive sensors, resistance type strain gauges or other transmission devices capable of detecting pressure changes.

Preferably, the knocking area is used for knocking, and when a user knocks the area by hand or a piano bamboo, the pressure sensor can detect pressure change in real time, convert the pressure change into an electric signal and transmit the electric signal to the signal processor.

And when the user touches the touch area with a body, the touch sensor can monitor the change of the yes/no touch state in real time, convert the change into an electric signal and transmit the electric signal to the signal processor.

Preferably, the operation portion has a clip-shaped structure.

Preferably, one signal processor may be connected to one or more sets of interaction modules, depending on the processing power of the signal processor.

The signal processor is used for receiving signals generated by the sensor on the interaction module, generating a music signal instruction by combining a built-in algorithm and transmitting the music signal instruction to the output module.

The format of the music signal command may be one or more of midi (music information Digital interface) signal, osc (open Sound control).

The output mode of the music signal instruction can be one or more of MIDI port, serial port, parallel port, USB, Bluetooth, Wi-Fi, Ethernet and the like.

Preferably, the output module comprises a sound synthesizer and an audio output interface.

The sound synthesizer reads MIDI or OSC signals in the signal processor as input, and transmits output sound to an audio output interface by taking a sampling sound source or a soft synthesis sound source as a sound generation mode, the audio output interface outputs analog audio signals, and then the audio output interface is connected with a loudspeaker or an earphone, namely the audio signals are played through the loudspeaker or the earphone.

The sound synthesizer may be a soft wave table synthesizer or an FM synthesizer.

Preferably, the interactive electronic dulcimer further comprises a pedal; the pedal is connected with the sound synthesizer and is used for controlling the parameter change of the sound synthesizer. When the stroke state of the pedal is changed, the parameter for controlling the length of the delay sound in the sound synthesizer is changed, and the attenuation time of the emitted sound is changed.

Fig. 4 is a schematic flow chart of an interaction method of an interactive electronic dulcimer according to an embodiment of the present invention, and as shown in fig. 4, the interaction method includes the following steps:

step 101: collecting playing data of a player through a sensor on the interactive module and transmitting the playing data to the information processor; the playing data includes pressure data and touch data.

Step 102: and the signal processor generates a music signal instruction according to the collected playing data and transmits the music signal instruction to a sound synthesizer in the output module.

Step 103: and the sound synthesizer synthesizes sound according to the received music signal instruction and plays the sound through a loudspeaker or an earphone which is connected with the audio output interface in the output module.

When a 'low-high-low' signal appears in pressure data received by the signal processor, the signal processor outputs a note playing instruction, an interaction module which outputs the 'low-high-low' signal is marked to be in a note playing state, the triggering time of the current event is recorded, a timer is set, and after the time is over, the signal processor outputs a note ending instruction. The low-high-low signals are three continuous pulse signals which are respectively a low pulse signal, a high pulse signal and a low pulse signal; the low pulse signal is a pulse signal lower than a set threshold value, and the high pulse signal is a pulse signal higher than the set threshold value; the pitch of the note's pitch is determined by the interactive module struck or impacted by the player; the strength of the sound of the notes is calculated by the pressure generated by one or more pressure sensors triggered by the knocking or striking of the player; wherein the location of the player's strike or impact is transmitted to the sound synthesizer, which modifies the tone accordingly.

When pulse 0 is changed into pulse 1 in the touch data received by the signal processor, the signal processor outputs a note ending instruction; the pitch at which the note ends is determined by the interactive module touched by the player.

During the performance, when the signal processor receives different pressure data, the signal processor outputs different signal instructions; the method specifically comprises the following steps:

when the current pressure data received by the signal processor is a low-low signal, the signal processor does not output any signal instruction.

And when the current pressure data received by the signal processor is a low-high signal, the signal processor outputs a signal instruction for acquiring data of the next period and judges again.

When the current pressure data received by the signal processor is a low-high-low signal, the signal processor outputs a knocking signal instruction.

When the current pressure data received by the signal processor is a low-high signal, the signal processor outputs a bending sound starting instruction.

And when the current pressure data received by the signal processor is a high-low signal, the signal processor outputs a bending sound ending instruction.

And when the current pressure data received by the signal processor is a high-low-high signal, the signal processor outputs a signal instruction for acquiring data of the next period and judges again.

And when the current pressure data received by the signal processor is a high-high signal, the signal processor outputs a bending sound ending instruction.

And when the current pressure data received by the signal processor is a high-high signal, the signal processor outputs a bending sound continuing instruction.

The following describes the interaction process of the interactive electronic dulcimer.

And acquiring pressure data and touch data of each channel from a hardware device, calling an algorithm built in a signal processor after acquiring the data in each signal acquisition period, and calculating the acquired data so as to output a music signal instruction. Wherein, the touch signal is marked as T (touch), and the Pressure signals are marked as P1, P2, P3 … … (Pressure).

The pressure sensor is an analog signal component, and needs to acquire signals through an analog-to-digital converter (ADC) and convert the signals into digital signals. The acquisition of the digital signal has a fixed period (fixed sampling rate). For the converted digital signal, the smaller the pressure, the lower the corresponding value, and the larger the pressure, the higher the corresponding value. A pressure level threshold is set below which the signal is marked low, whereas the signal is high.

Detecting note onset:

the multiple knocking pressure sensors are used for detecting knocking operations in a knocking area and are marked as Pa-Pb (b > ═ a, the labels are from the a-th sensor to the b-th sensor, and one (a ═ b) or a plurality of (a < b)), when the sensors in the Pa-Pb detect pulse signal of 'low-high-low', the current player is considered to operate as 'knocking', and the signal processor outputs a 'Note sound' (Note On) instruction.

The position of a beating point of a player on a beating plane (X-Y axis) or the coordinates of a one-dimensional position of the X axis are calculated by the beating position according to the relative pressure values acquired by a plurality of sensors in Pa-Pb (when the number of the pressure sensors in the beating and impacting area in a group of interaction modules is more than 1, one sensor is respectively arranged at two ends of at least one coordinate axis, and the pressure sensor can be arranged in the middle according to the precision requirement).

The specific method for determining the knocking position comprises the following steps:

a plurality of knocking pressure sensors are arranged on the same coordinate axis, knocking is performed for multiple times from one end to the other end, the magnitude of pulse signals collected by each knocking pressure sensor is recorded, linear regression is performed, and the position of a knocking point on the coordinate axis is reversely obtained from the difference (proportion) of the pulse signals collected by the knocking pressure sensors. After the standard is determined, the subsequent knocking can be carried out by regression according to the pulse signal magnitude of each knocking pressure sensor to calculate the knocking position.

And arranging a plurality of knocking pressure sensors on an X-Y axis plane, recording the relative knocking pressure in two coordinate axes respectively, and calculating the positions of knocking points on the two coordinate axes according to linear regression.

The degree of the music note playing is obtained by calculation of one of equal ratio conversion, exponential function conversion and logarithmic function conversion according to the pressure of one or more knocking pressure sensors triggered by knocking (according to the amplitude of the pulse signal, the degree of the music note playing is obtained by conversion of one of equal ratio conversion, exponential function and logarithmic function).

The pitch of the note is derived according to which interactive module is struck (a plurality of sets of interactive modules are arranged in an electroacoustic musical instrument and are connected to a signal processor through wired transmission, and the signal processor distinguishes the labels of communication ports such as serial ports or USB ports according to connecting wires so as to know which set of interactive module the current signal comes from).

After the beginning of the note is detected, the state of knocking 'note playing' of the interactive module is marked as true, the triggering time of the current event is recorded, a timer is set, and after the time is over, the signal processor outputs a 'note ending' instruction (for example, a note ending signal is sent after 2 seconds is timed, the timer is timed over 2 seconds, and the triggering is carried out, and a 'note ending' signal is sent).

If the state (boolean variable) of the interactive module 'Note playing' is true, a corresponding 'Note ending' (Note Off) command is sent before the 'Note playing' command is sent. (one of the MIDI instructions, instructing the sound synthesizer to stop producing the sound of the specified note). The aim is to strike the sounding note before the program automatically stops and imitate the natural sound stopping effect of the dulcimer. Otherwise, each tone must be manually stopped.

Similarly, a plurality of impact pressure sensors are used for detecting impact operations in the impact area, and are marked as Pc-Pd (d > -c), when the sensors in the Pc-Pd detect pulse signal signals of low-high-low, the current player operation is considered as the impact operation (according to the difference of the marks of the sensors, the marks from the a to the b are impact pressure sensors, and the marks from the c to the d are impact pressure sensors), and the signal processor outputs a Note playing and sounding (Note On) instruction.

Wherein, the impact position calculates the position of the impact point of the player on the impact plane (X-Y axis) or the coordinate of the X-axis one-dimensional position according to the relative pressure collected by a plurality of sensors in Pc-Pd.

The degree of the music note playing is obtained by calculation of one of geometric transformation, exponential function transformation and logarithmic function transformation according to the pressure of one or more impact pressure sensors triggered by impact.

The pitch of the note is derived according to which interactive module is struck.

After the beginning of the note is detected, the state of impacting 'note playing' of the interaction module is marked as true, the triggering time of the current event is recorded, a timer is set, and after the time is over, a signal processor outputs a 'note ending' instruction.

If the impact 'Note playing' state of the interaction module is true, a corresponding 'Note ending' (Note Off) instruction is sent before the 'Note playing' instruction is sent.

Detecting note ending:

there are several touch sensors for detecting a touch operation of the touch area, and a change of the touch signal T from 0 (no touch) to 1 (touch) indicates the end of the detection note.

If the corresponding note mark of the current interactive module is in the state of 'note playing', a 'note ending' (notes) instruction is output, the corresponding timer is reset, and the state of 'note playing' is reset.

Detecting bend sound:

when the knocking pressure sensor detects a slowly and continuously changing signal (pressure signals of three cycles are collected continuously and are marked as high or low in sequence, wherein the low is low, the low is no operation, the low is high, the high is low, the high is one cycle is collected again, the judgment is carried out again, the low is high, the high is high, the bending is started, the high is low, the bending is finished, the high is high, the bending is continued (the bending pitch is updated)), the fact that a player presses a knocking area means that the player presses the knocking area, at the moment, the knocking area is converted into the bending degree (a mapping curve of one of an equal proportion conversion function, an exponential function and a logarithmic function) according to the pressure detected by the knocking pressure sensor, and a note bending (Pitchbend) instruction is output for changing the.

Bending sound: pitch change in MIDI, here designed to change the pitch size of a given tone according to the magnitude of the force a user presses.

The dulcimer playing technique which can be reproduced electronically according to this scheme includes: regular bamboo, reverse bamboo, tremble bamboo, bamboo plucking, finger belly plucking, string kneading, pause sound, bamboo smothering, shaking, disordered plucking, sound stopping, lingering sound, hand sound stopping, and two-position sound.

The principle of the support method of the dulcimer technique will be described in detail below.

The technique comprises the following steps: bamboo

Description of the technical methods: the string is struck by the protruding (rubber-bearing) side (namely the front side) of the dulcimer bamboo and is lifted quickly, so that the string can emit soft sound.

Recurring description: after the knocking pressure sensor on the knocking area detects that a pulse signal exists, the knocking force and the knocking position are calculated, and the signal processing device outputs a corresponding music signal instruction.

The technique comprises the following steps: bamboo block

Description of the technical methods: the string is struck by using the non-protruding (rubber-free) side (namely the back) of the dulcimer bamboo, and is quickly lifted, so that the dulcimer bamboo can emit bright sound.

Recurring description: a plane magnet is fixed on the back of the piano bamboo, and the direction of the magnetic induction line is consistent with the knocking direction. And a Hall sensor is arranged in the knocking area to detect the magnetic field intensity. After the knocking pressure sensor on the knocking area detects a pulse signal, the knocking force and the knocking position are calculated, the measured value of the Hall sensor is read to judge the front and back characteristics of knocking, and the signal processing device outputs a corresponding music signal instruction.

The technique comprises the following steps: bamboo made of bamboo

Description of the technical methods: the left hand and the right hand respectively hold a bamboo organ and simultaneously strike the dulcimer to play different pitches.

Recurring description: a performance apparatus includes a plurality of interactive modules. Different interactive modules correspond to different pitches. When a user (player) strikes a plurality of interactive modules at the same time, the signal processing apparatus independently processes signals of the plurality of interactive modules in parallel and gives a correct music signal instruction as an output.

The technique comprises the following steps: two-bit sound

Description of the technical methods: a technique of striking a dulcimer with a bamboo having two bamboo heads so that the two bamboo heads can simultaneously land on two different string positions of the dulcimer to simultaneously play two tones is called diphone.

Recurring description: (homo bamboo).

The technique comprises the following steps: wheel bamboo

Description of the technical methods: the left hand and the right hand can quickly and repeatedly use the piano bamboo to knock the same sound or two different sounds to generate continuous timbre.

Recurring description: after the knocking pressure sensor on the knocking area detects that a pulse signal exists, the knocking force and the knocking position are calculated, and the signal processor outputs a corresponding music signal instruction. The music signal command comprises a note ending command and a note starting command. After the sound synthesizer receives the music signal instruction, the knocking sound is synthesized in sequence to obtain a continuous tone.

The technique comprises the following steps: bamboo trembles

Description of the technical methods: the player uses the dulcimer bamboo to strike the strings of the dulcimer without lifting, so that the dulcimer bamboo vibrates for multiple times above the strings, and a series of dense tones are generated after the strings are struck.

Recurring description: (same wheel bamboo).

The technique comprises the following steps: rou string

Description of the technical methods: in the dulcimer, each string is divided into two parts on the panel by the bridge, and when pressure is applied to one side of the string, the other side of the string is played, the pitch is increased, and the larger the pressure is, the higher the pitch is. A playing technique of applying, changing the opposite side string pressure so that the pitch of a struck note is changed, before, at the beginning, during the striking of a note is called string twisting.

Recurring description: the two interactive modules which are mutually influenced are associated in software, when the 'note playing' state of one interactive module is true and the pressure sensor on the other interactive module detects a slowly and continuously changing signal, the signal processing device outputs a 'note bending' instruction of the playing sound, and the bending degree is calculated according to the pressure on the tapping pressure sensor.

The technique comprises the following steps: hand stop sound

Description of the technical methods: after a sound is played by a piano, the strings are pressed with fingers before they naturally stop, so that the strings stop vibrating and the sound disappears.

Recurring description: when the touch area detects that the touch state changes from "no touch" to "touch", if "note playing" is true, the signal processing device sends a "note stop" instruction.

The technique comprises the following steps: bamboo tube

Description of the technical methods: the tail ends of the dulcimer bamboos are inclined to pass through the dulcimer strings in sequence, so that the strings with the same pitch vibrate and produce sound in sequence.

Recurring description: when a player plays the bamboo plucking technique, the impact pressure sensor in the striking area detects the gradual increase of the pressure and the sudden decrease of the pressure when the tail of the bamboo strokes the string. When the impact pressure sensor detects a sudden pressure decrease, the signal processing device sends a 'note start' instruction. The command is different from music commands triggered by the striking area, such as front bamboo and reverse bamboo. When the sound synthesizer receives the music signal command, it generates a sound different from the sound triggered according to the striking area, which is similar to the sound of a string played alone.

The technique comprises the following steps: stopping/delaying sound

Description of the technical methods: the dulcimer is provided with a pedal, the half-stop sound can be realized by slightly pressing the pedal, the full-stop sound can be realized by pressing the pedal, and the lingering sound can be realized by not stepping the pedal.

Recurring description: a pedal is provided, coupled to the vocoder, for controlling variation of parameters of the vocoder. When the stroke state of the pedal is changed, the parameter for controlling the delay length in the sound synthesizer is changed, and the attenuation time of the emitted sound is changed.

Compared with the prior art, the electronic dulcimer provided by the invention has the following advantages:

first, as the electronic musical instrument based on the dulcimer, compared with the modern wooden dulcimer, the instrument has the advantages of light weight, convenient transportation and maintenance-free (tuning-free and loose preservation environment). The sound amplifying system can be directly connected in a rehearsal room or a stage playing, so that the sound pickup of the musical instrument is simpler and more convenient.

Second, most dulcimer playing techniques can be seamlessly migrated, including: regular bamboo, reverse bamboo, parquet bamboo, bamboo wheel, tremble bamboo, bamboo plucking, finger belly plucking, string kneading, pause sound, bamboo smothering, shaking, disordered plucking, stop sound, sustain sound, hand stop sound, two-tone sound, and the like. As the inheritance and innovation of national musical instruments, the musical instrument can be played by playing the dulcimer.

Thirdly, as the electronic musical instrument, it can automatically record the music with the help of the computer/mobile terminal, and it can play the electronic synthesizer with the playing method of dulcimer to generate the tone or the electroacoustic tone of various musical instruments, giving the player/creator a larger creation space and enriching the music expressive force.

Fourth, relative to MIDI controllers such as electronic organ, electric piano, electric drum, electric marlinba, launchpad, etc., this electronic dulcimer gives players more degrees of freedom of operation, and besides pressing, knocking, players can use playing techniques such as scratching on other geometric dimensions of the same set of interaction devices, thus produce more changeable timbre, express more exquisite musical emotion.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.