WO2016173002A1

WO2016173002A1 - String press detection device, string instrument, string instrument system and string detection method

Info

Publication number: WO2016173002A1
Application number: PCT/CN2015/078821
Authority: WO
Inventors: 王正盛; 韩启贤
Original assignee: 北京趣乐科技有限公司
Priority date: 2015-04-29
Filing date: 2015-05-13
Publication date: 2016-11-03
Also published as: CN104792341A

Abstract

A string press detection device, a string instrument, a string instrument system and a string detection method. The string press detection device (200) comprises: a switch array (21) composed of a plurality of strings and a plurality of frets, a signal processing module (22) electrically connected to a plurality of switches of the switch array (21) and a first data communication module (23) electrically connected to the signal processing module (22), wherein each intersection point of the plurality of strings and the plurality of frets corresponds to one corresponding switch of the plurality of switches of the switch array (21), the signal processing module (22) scans the states of the switches of the switch array (21) so as to acquire string press positions of the plurality of strings and generates string press signals corresponding to the string press positions, and the first data communication module (23) sends the string press signals. The string press device (200) can detect whether fingers of a player press on correct positions and whether the player plays correctly.

Description

String detection device, stringed instrument, stringed instrument system and string detection method

The present application claims priority to Chinese Patent Application No. 2015102119433, filed on Apr. 29, 2015, entitled "Single String Detection Device, String Instrument, String Instrument System, and String Detection Method", the entire contents of which are incorporated by reference. In this application.

Technical field

The invention belongs to the field of musical instruments, and in particular relates to a string detecting device, a stringed instrument, a stringed instrument system and a string detecting method.

Background technique

A stringed instrument is a musical instrument that emits sound by string vibration. Stringed instruments are an important branch of the instrument family. In classical music and even modern light music, almost all lyric melody is played by the string part. The tone of the stringed instrument is unified, and there are many levels of expressiveness: the ensemble is full of excitement, and the solo is gentle and graceful; it is also agile because of the rich and varied bowing method (shake, broken, dial, jump, etc.). Stringed instruments include cellos, violins, guitars, and more.

Stringed instruments include strings and fingerboards. While playing, one hand presses the string on the fingerboard, and the other hand plucks the string directly or with a bow. The essence of stringed instrument performance is the combination of string action and plucking action. Different chord positions produce different sounds.

Filaments are also placed on the fingerboard of some stringed instruments, such as guitars. A silk is a wire on the board that is approximately perpendicular to the string and is used to separate the different grades. Different grades of different sounds are synthesized by string action and plucking. As shown in Fig. 1, 101 marks the grade combination of the AM chord, and 102 marks the grade combination of the C major scale.

The correct chord position of a stringed instrument is very important and very difficult for beginners. The learner can only correct the mistakes in order to improve the performance level if he learns whether to play correctly and play the wrong part during the playing process.

Summary of the invention

It is an object of the present invention to provide a string detecting device, a stringed instrument, a stringed instrument system, and a string detecting method.

According to an aspect of the present invention, there is provided a string detecting device comprising: a switch array composed of a plurality of strings and a plurality of wires, wherein each of the plurality of strings and the plurality of wires cross each other a point corresponding to a respective one of the plurality of switches of the switch array; a signal processing module electrically coupled to the plurality of switches of the switch array And a first data communication module electrically coupled to the signal processing module, wherein the signal processing module scans a switch state of the switch array to obtain a pitch position of the plurality of strings and generates a position corresponding to the string position Corresponding to the string signal, the first data communication module sends a string signal.

Preferably, a closed state of each of the plurality of switches is at a corresponding intersection, a respective one of the plurality of strings and a corresponding one of the plurality of wires a state of contact, an off state of each of the plurality of switches being a corresponding intersection, a respective one of the plurality of strings and a corresponding one of the plurality of wires Separated state.

Preferably, in one scan period, the signal processing circuit is set to a low level by a string, and the signal level is detected by the wire during each low period of the string, if the signal level is low, It means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected.

Preferably, in one scan period, the signal processing circuit sets a low level one by one, and detects a signal level line by string during each low period of the product, if the signal level is low, It means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected.

Preferably, the chord signal generated by the signal processing circuit is serial data or parallel data representing a switching state of a plurality of switches of the switch array.

Preferably, the first data communication module comprises at least one of a signal line, a Bluetooth module, and a wireless network (Wi-Fi) module.

Preferably, the string detecting device further comprises a power module for supplying power to the signal processing module and the first data communication module.

According to a second aspect of the present invention, there is provided a stringed musical instrument comprising: a plurality of strings; a plurality of filaments; and the above-described string detecting means.

Preferably, the stringed instrument is one selected from the group consisting of a cello, a violin, a guitar, a zither, an erhu, and a ukulele.

Preferably, the plurality of strings and the plurality of wires are each composed of a metal or an alloy.

According to a third aspect of the present invention, a stringed instrument system comprising: the stringed musical instrument described above; and an intelligent terminal, the smart terminal comprising a second data communication module, a signal processing module, and a display screen, the second data communication module receiving The string data signal sent by the first data communication module of the stringed instrument, the signal processing module decodes the string signal to obtain the string position, and displays the string position on the display screen.

Preferably, the display screen displays a schematic view of the stringed instrument and a string icon, the string icon showing a position in the schematic corresponding to the stringed position of the stringed instrument. Preferably, the display screen displays a score and a string icon, the string icon showing a position in the score corresponding to the string position of the stringed instrument.

Preferably, the display screen displays a video and a string icon indicating the string position in the video.

Preferably, the stringed instrument system further comprises: a microphone for acquiring an audio signal of the plucked string, wherein the signal processing module of the intelligent terminal processes the audio signal to obtain a plucking signal, and displays the plucked string on the display screen signal.

Preferably, at least one of the pattern, size and color of the string icon indicates a plucking signal.

According to a fourth aspect of the present invention, there is provided a string detecting method comprising: forming a plurality of strings and a plurality of wires into a switch array, each of the plurality of strings and each of the plurality of wires corresponding to each intersection And a corresponding one of the plurality of switches of the switch array; scanning a switch state of the switch array to obtain a pitch position of the plurality of strings; generating a string signal corresponding to the string position; and transmitting a button String signal.

Preferably, the step of scanning the switch state of the switch array comprises: setting a low level one by one in a scan period; and detecting a signal level by the wire during each low period of the string, wherein if the signal When the level is low, it means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected.

Preferably, the step of scanning the switching state of the switch array comprises: setting a low level by one wire in one scanning cycle; and detecting a signal level by a string line during each low level of the wire, wherein if the signal When the level is low, it means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected.

Preferably, the step of generating a chord signal corresponding to the chord position comprises processing the switching states of the plurality of switches of the switch array into serial data or parallel data.

Preferably, the string detecting method further comprises: acquiring an audio signal of the plucked string; and processing the audio signal to obtain a plucking signal.

Preferably, the string detecting method further comprises: displaying a schematic diagram of the stringed instrument and a string pressing icon on the display screen, the string pressing icon displaying a position corresponding to the stringed position of the stringed instrument in the schematic diagram.

Preferably, the string detecting method further comprises: displaying a score and a string icon on the display screen, the string icon showing a position in the score corresponding to the string position of the stringed instrument.

Preferably, the string detecting method further comprises: displaying a video and a string icon on the display screen, the string diagram Indicates the position of the string in the video.

Preferably, the string detecting method further comprises: displaying a plucking signal on the display screen.

The string detecting device and the string instrument provided by the invention use the switch array scanning method to recognize the string position of the string instrument, and the string instrument system uses the high sound recognition method to recognize the string position of the string instrument, and the intelligent terminal of the string instrument system can also press the string according to the string. The position and the plucking position are converted into musical score data, and compared with the original musical score data in the smart terminal, to detect whether the player's finger is pressed at the correct position and whether it is played correctly.

DRAWINGS

Figure 1 shows a schematic diagram of a chord and scale of a stringed instrument;

2 is a block diagram showing the structure of a string detecting device according to an embodiment of the present invention;

3 shows a circuit diagram of a switch array of a string sensing device in accordance with an embodiment of the present invention;

4 shows a schematic diagram of switch array data in accordance with an embodiment of the present invention;

Figure 5 shows a perspective schematic view of a stringed instrument guitar in accordance with an embodiment of the present invention;

Figure 6 is a block diagram showing the structure of a stringed instrument guitar in accordance with an embodiment of the present invention;

7a-7b are schematic views respectively showing the front and rear of a stringed guitar according to an embodiment of the present invention;

Figure 8 is a block diagram showing the structure of a stringed instrument system in accordance with an embodiment of the present invention;

9a-9b are schematic views respectively showing a chord position and a plucking position displayed on a smart terminal according to an embodiment of the present invention;

FIG. 10 shows a flow chart of a string detecting method in accordance with an embodiment of the present invention.

detailed description

The following disclosure provides many different embodiments or examples for implementing different features of the present application. Specific embodiments of the components or arrangements are described below to simplify the invention. Of course, these are merely examples and are not intended to limit the invention.

In addition, in the specification and claims, the terms "first," "second," etc. are used to distinguish between the like elements, and do not necessarily describe the chronological order, the spatial order, the hierarchical order, or any other order. It is to be understood that the terms of the invention are to be construed as being in the context

It should be noted that the term "comprising", used in the claims, should not be construed as being limited to the Means, it does not exclude other components or steps. Thus, it should be understood that the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

References to "one embodiment" or "an embodiment" in this specification are intended to mean that the particular features, structures, or characteristics described in connection with the embodiments are included in at least one embodiment of the invention. Thus, the appearance of the phrases "in one embodiment" or "the" In addition, it will be apparent to those skilled in the art <RTI ID=0.0></RTI> that the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

2 shows a schematic structural view of a chord detecting device according to an embodiment of the present invention; the chord detecting device 200 includes a switch array 21, a signal processing module 22, and a first data communication module 23.

The switch array 21 includes a switch array composed of a plurality of strings and a plurality of wires, and the pitch positions of the plurality of strings are obtained by scanning the switch states of the switch array.

The signal processing module 22 includes a first processing chip 221 (not shown in FIG. 2) and a second processing chip 222 (not shown in FIG. 2). One end of the switch array located in the same row is electrically connected to the first processing chip 221, and one end of the switch array in the same row is electrically connected to the second processing chip 222; the first processing chip outputs a position signal corresponding to the row, and the second processing chip outputs The column corresponding position signal, the signal processing module 22 outputs the row and column position corresponding to the string position to the data communication module.

In the present embodiment, FIG. 3 shows a circuit diagram of a switch array of a string detecting device according to an embodiment of the present invention, the switch array including m strings and n pieces of switch arrays (S ₁₁ -S _mn ), The output terminal Pm0 of the switch array (S _m1 -S _mn ) of the same row is electrically connected to the first processing chip 221, and the output terminal P0n of the switch array (S _1n -S _mn ) of the same column is electrically connected to the second processing chip 222. The switch array further includes a plurality of resistors R1-Rn, wherein one end of Rn is connected to the output terminal P0n of the switch array (S _1n -S _mn ) of the same column, and the other end is connected to the power supply voltage Vcc.

The switch array 21 scans the switching signals corresponding to the chord positions of the plurality of strings by one of the methods of the switch array scanning. For example: first output 0 in the first line, check whether the column line is not full height; otherwise the second line outputs 0, check whether the column line is not full height; otherwise the third line outputs 0, check whether the column line is not full height; if a line outputs 0 , find that the column line is not full height, then the line has a string press; according to the first row line output 0 and the first few lines read in When it is 0, it can be judged at which position the pressed string is.

The first data communication module 23 transmits the received row and column position corresponding to the string position to the smart terminal.

In this embodiment, the signal processing module 22 sends the row and column positions corresponding to the string position to the smart terminal through the first data communication module 23, where we use a switch array data (as shown in FIG. 4) to represent the two strings. When the three products are pressed, 1 indicates that the circuit is connected, that is, the pressed state, and we send the data to the smart terminal. The smart terminal can know the current user's finger press.

Based on the above embodiment, the string detecting device further includes a power module 24 for supplying power to the signal processing module and the data communication module.

The string detecting device provided by the embodiment of the invention has a simple structure, and can scan the string position of the instrument through the switch array scanning mode.

The guitar is a kind of stringed instrument. The guitar is taken as an example to introduce the structure of the stringed instrument. The structure is also applicable to other types of stringed instruments, such as violin, cello and so on.

The fingerboard of the guitar is provided with silk to separate the different grades. In other stringed instruments, the conventional structure does not include the silk on the fingerboard. However, in order to apply the string detecting method of the present invention, the conventional structure can be modified to provide additional wires on the fingerboard. In any type of stringed instrument, the additional silk is easy for beginners to practice. Therefore, the embodiments described below in connection with the guitar can be applied to any type of stringed instrument.

Fig. 5 shows a perspective view of a stringed instrument guitar according to an embodiment of the invention, the guitar comprising a guitar body 1, which is composed of a body portion 2 and a neck 3. The guitar body 1 further includes a plurality of strings 4 extending across the body portion 2 and the neck 3 of the neck portion. The fingerboard 11 is disposed between the body portion 2 and the neck 3, which is a wooden or synthetic resin strip plate, along the tensioning and erecting direction of the plurality of strings 4, in other words, the neck 3 In the longitudinal direction, a plurality of filaments 12 are provided at predetermined intervals. Each of the plurality of filaments 12 is formed of a metal having a small electrical resistance such as copper or zinc white copper.

6 shows a schematic structural view of a stringed instrument guitar including a plurality of electrically conductive strings 4 and a plurality of filaments 12, in accordance with an embodiment of the present invention. The plurality of strings 4 and the plurality of filaments 12 are respectively composed of, for example, a metal or an alloy. The string detecting device 200 described in the above embodiment is electrically connected to the plurality of strings 4 and the plurality of wires 12.

The string detecting device 200 includes a switch array 21, a signal processing module 22, and a first data communication module 23.

Wherein, the switch array 21 comprises a switch array composed of a plurality of strings and a plurality of wires, which are scanned And switching states of the switch array obtain a pitch position of the plurality of strings;

The signal processing module 22 includes a first processing chip 221 (not shown in FIG. 2) and a second processing chip 222 (not shown in FIG. 2), wherein one end of the switch array located in the same direction and the first processing chip 221 Electrically connected, one end of the switch array in the same row is electrically connected to the second processing chip 222; the first processing chip outputs a position signal corresponding to the row, and the second processing chip outputs a position signal corresponding to the column, and the signal processing module 22 Outputting to the data communication module according to the position of the row and column corresponding to the position of the string;

The switch array 21 scans the switching signals corresponding to the chord positions of the plurality of strings by one of the methods of the switch array scanning. For example: first output 0 in the first line, check whether the column line is not full height; otherwise the second line outputs 0, check whether the column line is not full height; otherwise the third line outputs 0, check whether the column line is not full height; if a line outputs 0 If it is found that the column line is not full height, then the line has a string press; according to the first line line output 0 and the first column line read into 0, it can be determined at which position the pressed string. When the finger is pressed, the circuit is turned on after the string and the wire are in contact, as shown in the figure of the instrument before and after the string, as shown in Figures 7a-7b.

The signal processing module 22 sends the row and column position corresponding to the string position to the smart terminal through the first data communication module 23, where we use a switch array data (as shown in FIG. 4) to indicate the state when the two-string three products are pressed. , 1 means that the circuit is connected, that is, the state of pressing, we send the data to the intelligent terminal. The smart terminal can know the current user's finger press.

The stringed instrument provided by the embodiment of the invention can recognize the position of the left hand pressing through the switch array scanning method, and can determine whether the left hand is correct or not. However, the performance is divided into two parts, one is left-handed pressing and the other is right-handed playing. The guitar is used as an example to introduce a stringed instrument system that can recognize right-handed playing.

FIG. 8 shows a schematic structural view of a stringed instrument system in accordance with an embodiment of the present invention. The stringed instrument system includes a smart terminal 700 and a stringed instrument 600 as described in the above embodiments, the smart terminal 700 including a microphone 71, a second data communication module 72, a signal processing module 73, and a display screen 74.

The microphone 71 is used to acquire audio data when the stringed instrument 600 is played and sent to the signal processing module 73.

The second data communication module 72 receives the chord signal transmitted by the first data communication module 23 of the stringed instrument 600.

The signal processing module 73 is configured to receive the chord position corresponding to the chord position and identify a plucking action corresponding to the audio data, and corresponding the chord position corresponding to the chord position and the audio data Dial The string action is sent to display 74.

The display screen is configured to display a chord position corresponding to the chord position and a plucking action corresponding to the audio data.

In this embodiment, the intelligent terminal uses the fundamental frequency detection to identify the plucking action. There are many methods for fundamental frequency detection, such as parallel processing based on time domain signals; modified autocorrelation method for clipping (AUTOC); average amplitude difference function method (AMDF); logarithmic harmonic product method based on moving window Fourier transform . We make the pitch recognition based on the position of the string.

There are many mature softwares in the pitch recognition application, such as guitar tuner and other mobile phone software. Our implementation process uses an open source pitch recognition algorithm called TarsosDSP, official website (http://0110.be/tags/TarsosDSP). The pitch recognition algorithm can be run directly on the android phone. The algorithm has a single tone recognition rate of over 90%. In the smart terminal, we choose an Android smartphone. When the guitar is playing, the mobile phone microphone (mic) collects the sound, and the pitch of the received audio is recognized. Finally, the existing The fingers are matched.

After the plucking action is recognized, the string position data and the plucking action are sent to the display for display. The display screen displays a schematic view of the stringed instrument and a string icon, the string icon showing the position in the schematic corresponding to the string position of the stringed instrument. At least one of the pattern, size, and color of the string icon indicates a plucking signal.

In one example, the results are shown in Figure 9. Six strings and a portion of the grade are shown on the screen. Press the string icon as a circle. If the string is not plucked, the color of the string icon is dark red, and if the string is plucked, the color of the string icon is yellow.

The stringed instrument system provided by the embodiment of the present invention recognizes the string position data by the string detecting device, and determines the pitch search range based on the string position data, and then uses the audio base frequency detection to identify the stringing action. Greatly improve the accuracy of pitch recognition.

FIG. 10 shows a flow chart of a string detecting method in accordance with an embodiment of the present invention. The string detecting method includes:

In step S01, a plurality of strings and a plurality of wires are formed into a switch array, and each intersection of the plurality of strings and the plurality of wires corresponds to a corresponding one of the plurality of switches of the switch array A switch.

In step S02, the switching state of the switch array is scanned to obtain the pitch position of the plurality of strings.

In a preferred embodiment, the step of scanning the switch state of the switch array includes: setting a low level by a string in one scan period; and detecting a signal level by the wire during each low period of the string , wherein, if the signal level is low, it means that the corresponding string and the corresponding switch of the silk are closed, if the signal level is A high level indicates that the corresponding string and the corresponding switch of the wire are disconnected.

In another preferred embodiment, the step of scanning the switch state of the switch array includes: setting a low level of the product in one scan period; and detecting the signal line by string during each low period of the product Ping, wherein if the signal level is low, it means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected. .

In step S03, a stringing signal corresponding to the string position is generated; and a stringing signal is transmitted.

In a preferred embodiment, the step of generating a chord signal corresponding to the chord position comprises processing the switching states of the plurality of switches of the array of switches into serial data or parallel data.

Further, the string detecting method further comprises: acquiring an audio signal of the plucked string; and processing the audio signal to obtain a plucking signal.

Further, the string detecting method further includes: displaying a schematic diagram of the stringed instrument and a string pressing icon on the display screen, the string pressing icon displaying a position corresponding to the stringed position of the stringed instrument in the schematic diagram.

Further, the string detecting method further includes: displaying a score and a string icon on the display screen, the string icon showing a position in the score corresponding to the string position of the stringed instrument.

Further, the string detecting method further includes: displaying a video and a string icon on the display screen, the string icon indicating a string position in the video.

Further, the string detecting method further includes: displaying a plucking signal on the display screen.

Wherein, at least one of the pattern, the size and the color of the string icon indicates a plucking signal.

The above-described embodiments are only examples of the invention, and although the embodiments and the drawings of the invention are disclosed for the purpose of illustration, it will be understood by those skilled in the art Various substitutions, changes, and modifications are possible. Therefore, the invention should not be limited to the details disclosed in the embodiments and the drawings.

Claims

A string detecting device comprising:

a switch array consisting of a plurality of strings and a plurality of wires, wherein each intersection of the plurality of strings and the plurality of wires corresponds to a respective one of a plurality of switches of the switch array;

a signal processing module electrically coupled to the plurality of switches of the switch array;

a first data communication module electrically connected to the signal processing module,

Wherein the signal processing module scans a switch state of the switch array to obtain a chord position of the plurality of strings, and generates a chord signal corresponding to the chord position,

The first data communication module transmits a chirp signal.
The string detecting device according to claim 1, wherein a closed state of each of said plurality of switches is at a corresponding intersection, a corresponding one of said plurality of strings and said a contact state of a corresponding one of the plurality of filaments, an off state of each of the plurality of switches being a corresponding intersection, a corresponding one of the plurality of strings and the a separation state of a corresponding one of the plurality of filaments.
The chord detecting device according to claim 2, wherein said signal processing circuit sets a low level line by string during one scanning period, and detects a signal line by wire during each low period of each string If the signal level is low, it means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected.
The chord detecting device according to claim 2, wherein said signal processing circuit sets a low level one by one in a scan period, and detects a signal line by string during each low level of the product. If the signal level is low, it means that the corresponding string and the corresponding switch of the wire are closed. If the signal level is high, it means that the corresponding string and the corresponding switch of the wire are disconnected.
The chord detecting device according to claim 2, wherein the chord signal generated by said signal processing circuit is serial data or parallel data indicating a switching state of a plurality of switches of said switch array.
The string-stroke detecting apparatus according to claim 5, wherein said first data communication module comprises at least one of a signal line, a Bluetooth module, and a wireless network (Wi-Fi) module.
The string sensing device of claim 2, further comprising a power module for powering the signal processing module and the first data communication module.
A stringed instrument that includes:

Multiple strings;

Multiple filaments;

A string detecting device according to any one of claims 1 to 7.
The stringed instrument according to claim 8, wherein the stringed instrument is one selected from the group consisting of a cello, a violin, a guitar, a zither, an erhu, and a ukulele.
The stringed instrument of claim 8, wherein the plurality of strings and the plurality of wires are each composed of a metal or an alloy.
A stringed instrument system comprising:

a stringed instrument according to any one of claims 8 to 10;

Intelligent Terminal,

The smart terminal includes a second data communication module, a signal processing module and a display screen, and the second data communication module receives a chord signal sent by the first data communication module of the stringed instrument, and the signal processing module pairs the chord signal Decode to obtain the chord position and display the chord position on the display.
A stringed instrument system according to claim 11, wherein said display screen displays a schematic view of said stringed instrument and a string icon, said string icon showing a position in the schematic corresponding to the string position of the stringed instrument.
A stringed instrument system according to claim 11, wherein said display screen displays a score and a string icon, the string icon being displayed in a position corresponding to the string position of the stringed instrument in the score.
The stringed instrument system of claim 11 wherein said display screen displays a video and a string icon, said string icon indicating a string position in the video.
The stringed instrument system of claim 12, further comprising:

a microphone for obtaining an audio signal of a plucked string,

The signal processing module of the intelligent terminal processes the audio signal to obtain a plucking signal, and displays a plucking signal on the display screen.
The stringed instrument system of claim 15 wherein at least one of the pattern, size and color of the string icon indicates a plucking signal.
A string detection method comprising:

Forming a plurality of strings and a plurality of wires into a switch array, each intersection of the plurality of strings and the plurality of wires corresponding to a respective one of a plurality of switches of the switch array;

Scanning a switch state of the switch array to obtain a pitch position of the plurality of strings;

Generating a stringed signal corresponding to the position of the string; and

Send a string signal.
The string detecting method according to claim 17, wherein the step of scanning the switching state of the switch array comprises: in one scanning period,

Set the line low level; and

The signal level is detected by the wire during each low period of the string.

Wherein, if the signal level is low level, it means that the corresponding string and the corresponding switch of the silk are closed, and if the signal level is high, it means that the corresponding string and the corresponding switch of the silk are disconnected.
The string detecting method according to claim 17, wherein the step of scanning the switching state of the switch array comprises: in one scanning period,

Set the low level of the product; and

The signal level is detected by the string line during each low level of the filament.

Wherein, if the signal level is low level, it means that the corresponding string and the corresponding switch of the silk are closed, and if the signal level is high, it means that the corresponding string and the corresponding switch of the silk are disconnected.
The chord detecting method according to claim 17, wherein the step of generating a chord signal corresponding to the chord position comprises:

The switching states of the plurality of switches of the switch array are processed into serial data or parallel data.
The string detecting method according to claim 17, further comprising:

Acquiring the audio signal of the plucked string;

The audio signal is processed to obtain a plucked signal.
The string detecting method according to claim 21, further comprising:

A schematic diagram of the stringed instrument and a string icon are displayed on the display, the string icon being displayed in the schematic corresponding to the stringed position of the stringed instrument.
The string detecting method according to claim 21, further comprising:

The score and the string icon are displayed on the display, and the string icon is displayed in the score corresponding to the string position of the stringed instrument.
The string detecting method according to claim 21, further comprising:

A video and a string icon are displayed on the display, which indicates a string position in the video.
The string detecting method according to claim 22, further comprising:

The plucking signal is displayed on the display.
The string detecting method according to claim 25, wherein said pattern, size and size of said string icon At least one of the colors indicates a plucking signal.