KR102117685B1 - Apparatus and method for guide to playing a stringed instrument, and computer readable medium having computer program recorded thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for guiding a string instrument, and a recording medium in which a computer program is recorded. More specifically, the accuracy of the performance is determined by determining whether the playing sound or the stroke coincides with the score when playing according to the score with the string instrument. It relates to a recording medium in which a computer program is recorded, and an apparatus and method for guiding a string instrument to guide the player to increase the. The present invention compares the score analysis information analyzed according to the reproduction of the score information and the performance analysis information according to the performance of the stringed instrument of the user to determine the accuracy of the performance, thereby accurately providing the part played by the user to improve the accuracy of the performance In addition, it is possible to determine the accuracy of the stroke, which is the main method of the string instrument, and thus provides a more accurate determination of accuracy, and has an effect of guiding the stroke to be intensively improved.

Description

Apparatus and method for guide to playing a stringed instrument, and computer readable medium having computer program recorded thereof}

The present invention relates to an apparatus and method for guiding a string instrument, and a recording medium on which a computer program is recorded. More specifically, the accuracy of performance is determined by determining whether the playing sound or the stroke coincides with the score when playing according to the score with the string instrument. It relates to an apparatus and a method for guiding a string instrument to guide the user to increase the height, and a recording medium on which a computer program is recorded.

With the development of various electronic technologies, a system has been provided that analyzes sounds played through musical instruments on a user device or electronically implements various musical instruments on a user device to play the same as a real musical instrument using a user device.

However, in the case of string instruments composed of a plurality of strings among various instruments, different types of state methods are different from other instruments.

Typically, in the case of the stroke main method, which is the original method of string instruments, it is a method of lowering or raising several lines, and it is said that the strings are simultaneously ringing in the score, but the strings are actually played sequentially.

Conventionally, since there is no device that provides accuracy through electronic analysis by comparing the stroke method with sheet music, it is difficult to determine whether the correct performance is being performed through the device for analyzing the performance sound.

Accordingly, there is a need to develop a device that analyzes a performance sound in consideration of the specificity of such a string instrument and accurately provides a mistake.

Korean Registered Patent No. 10-1221673 [Invention name: electromagnetic guitar exercise device]

The present invention receives a performance sound through a user device when playing a string instrument, and provides a part different from the score accurately by comparing the received performance sound with the score to be played, and in particular, it is possible to accurately determine the accuracy of the stroke in the stroke part. The purpose is to provide a device.

An apparatus for guiding a string instrument according to an embodiment of the present invention includes a microphone unit for receiving an acoustic signal according to the performance of a string instrument, processing the acoustic signal received through the microphone unit, and performing sound information for the currently played sound Acoustic analysis unit that generates performance chord information for the chords of a string instrument, a playback unit that plays selected score information according to a user input from among pre-stored score information, and corresponds to a currently played position according to the playback order of the score information through the playback unit Sheet music analysis unit and the sound analysis unit for generating the stroke information for the start sound and the end sound of the stroke corresponding to the sheet music code information when a stroke is present in the sheet music information at the position and the sheet music code information for the chord of the stringed instrument After receiving the performance code information and the score code information from the music score analysis unit and comparing them with each other, the result information on whether or not the match is provided is provided, and sequentially from the sound analysis unit based on the point of time when the stroke information is received from the score analysis unit. It may include a judging unit that recognizes a start sound and an end sound from a plurality of the received sound information, generates start sound information and end sound information, and compares the stroke information with the stroke information to provide a match. .

As an example related to the present invention, when the stroke is an up-stroke, the score analysis unit sets the highest chord tone among the chord sounds constituting the chord corresponding to the score code information as the start tone and ends the lowest chord tone. Stroke information is set, and when the stroke is a down stroke, the lowest chord sound among the chords constituting the code corresponding to the score code information is set as the start sound and the highest chord sound is set as the end sound. It may be characterized by generating information.

As an example related to the present invention, the acoustic analysis unit converts the acoustic signal into a frequency domain to detect a frequency component, generates performance sound information for a preset performance sound corresponding to the detected frequency component, and generates the performance sound It may be characterized by generating performance chord information corresponding to the information.

As an example related to the present invention, the acoustic analysis unit compares the acoustic signal with a sample signal for each code, and generates performance code information for a code matched to the sample signal corresponding to the acoustic signal. It may be characterized by generating performance sound information for the set performance sound.

As an example related to the present invention, the acoustic analysis unit generates intensity information for the performance sound according to the frequency component included in the acoustic signal or the amplitude of the sample signal and provides it to the determination unit. According to the reproduction of the information, the strength information about the strength and weakness of the chord sound corresponding to the currently reproduced position is generated and provided to the determination unit, and the determination unit compares the strength information and the strength information and the strength and weakness of the performance sound included in the stroke It may be characterized in that it further includes whether or not to match the result information.

As an example related to the present invention, the acoustic analysis unit generates timing information on a playing time of the currently played performance sound and provides it to the determination unit, wherein the score analysis unit is currently played according to the reproduction of the sheet music information The time signature information is generated and provided to the determination unit, and the determination unit compares the time difference between different performance sounds according to the timing information and the time signature information to further include whether the match is included in the result information. Can be done with

The service device for a string performance guide according to an embodiment of the present invention processes sound signals according to the performance of a string instrument received from a user device through a communication network, thereby providing information about the performance sound and the code of the string performance. Acoustic analysis unit that generates performance chord information, a playback unit that transmits and plays selected musical score information according to selection information received from a user device among pre-stored musical score information to a user device, and according to the playback order of the musical score information through the playback unit Sheet music code information for the code of the string of the string corresponding to the position to be reproduced, and a stroke analysis unit for generating stroke information for the start and end sounds corresponding to the sheet music code information when a stroke exists in the sheet music information at the position and the After receiving the performance code information and the score code information from the sound analysis unit and the score analysis unit, comparing them with each other to generate result information on whether to match, and analyzing the sound based on the time point at which the stroke information is received from the score analysis unit Decision to generate start sound and end sound by recognizing the start sound and end sound from a plurality of performance sound information sequentially received from a part, and compare the stroke information with the stroke information and transmit the result to the user device It may contain wealth.

Method for a string instrument playing guide according to an embodiment of the present invention, the user device reproducing the selected sheet music information according to the user input from the pre-stored sheet music information, the user device through the microphone unit to the acoustic signal according to the performance of the string instrument In the receiving step, the user device processes the sound signal received through the microphone unit to generate performance sound information for the currently played performance sound and performance code information for the chord of the string instrument, and according to the playback order of the music score information Generating stroke information for the start and end sounds of the stroke corresponding to the score code information, if the stroke is present in the score information and the score code information for the chord of the string corresponding to the position to be reproduced; and After the user device receives the performance code information and score code information, it compares with each other to provide result information on whether or not it matches, and starts from a plurality of performance sound information sequentially generated based on a time point at which the stroke information is generated. And generating start sound information and end sound information by recognizing the end sound and providing the result information on whether the match is made by comparing the stroke information.

A computer program performing a method for guiding a string instrument may be stored in a recording medium on which a computer program according to an embodiment of the present invention is recorded.

The present invention compares the score analysis information analyzed according to the reproduction of the score information and the performance analysis information according to the performance of the user's string instrument, judges the accuracy of the performance, and accurately provides the part that the user incorrectly played, thereby improving the accuracy of the performance It has the effect of providing so that it can be made.

In addition, the present invention is capable of not only determining the accuracy of a simple chord or playing sound, but also determining the accuracy of the stroke, which is the main method of the string instrument, so as to provide a more accurate determination of accuracy and intensively improve the stroke. It has a guiding effect.

1 is a configuration environment diagram of a user device for a string instrument playing guide according to an embodiment of the present invention.
2 is a detailed configuration diagram of a user device for a string playing guide according to an embodiment of the present invention.
3 is a configuration diagram for calculating the result information according to the performance analysis and score analysis of the user device for a string playing guide according to an embodiment of the present invention.
4 is an exemplary diagram of code setting information according to an embodiment of the present invention.
5 is a detailed configuration diagram of a determination unit according to an embodiment of the present invention.
Figure 6 is an exemplary view illustrating the accuracy of the stroke of the user device for the string playing guide according to an embodiment of the present invention.
7 is a detailed configuration diagram of a service device for a string instrument playing guide according to an embodiment of the present invention.
8 is a flow chart for a method for a string instrument playing guide according to an embodiment of the present invention.

The present invention is a device for guiding the wrongly played part by providing the accuracy between the score and the performance when the user plays the string while looking at the score, as well as judging the accuracy of a simple chord or playing sound, as well as the main notes of the string instrument. The accuracy of the corporate stroke can be judged and guided to improve the accuracy of string instrument performance.

Prior to the description, the string instrument described in the present invention may include a plucked musical instrument that makes a sound by rubbing it with a finger, fingernail or peak, etc., a string instrument that makes a sound by rubbing it with a bow, a string instrument that makes a sound by striking it, etc. have.

Hereinafter, an apparatus and method for a string playing guide according to the present invention, and a recording medium on which a computer program is recorded will be described in detail with reference to the drawings.

1 is a configuration environment diagram of a user device for a string playing guide according to an embodiment of the present invention, as shown, the user device 100 for the string playing guide is a microphone for sound signal according to the performance of the string instrument 10 Through the received, it is possible to determine the performance accuracy by comparing with the pre-stored score information.

2 is a detailed configuration diagram of a user device 100 for a string playing guide according to an embodiment of the present invention, as shown, the microphone unit 120, the user interface unit 130, the memory unit 140, the output It may include a unit 150 and the application unit 110.

In this case, the application unit 110 may include an application that is downloaded and installed or pre-installed and operated on the user device 100, and may include various processors to support the function of the application.

According to the above-described configuration, the application unit 110 may generate performance analysis information by receiving and analyzing the performance sound of the string instrument through the microphone unit 120.

In more detail, the application unit 110 divides the sound signal received through the microphone unit 120 into a frequency domain or compares the sample signal set in the memory unit 140 with the performance code information corresponding to the performance sound. , Performance analysis information including performance information for performance sounds included in the performance sound, timing information for performance time of each performance sound, and intensity information according to amplitude of a signal corresponding to the performance sound may be generated.

In addition, the application unit 110 extracts sheet music information previously stored in the memory unit 140 according to a user input through the user interface unit 130 and then reproduces the sheet music information. The music score code information for the chord of the string included in the music score information, the stroke information corresponding to the chord of the string instrument, the chord sound information for the sound constituting the chord of the string instrument, the beat information, and the strength information are extracted from the score information Score analysis information can be generated.

Accordingly, the application unit 110 compares the score analysis information and the performance analysis information according to the reproduction order of the score information to determine whether or not the match is in real time, and displays the unmatched parts on the score information to output the output unit 150 Can be output via

Through this, the user can easily determine the accuracy of the performance by easily grasping the part that does not match the sheet music information while playing the string instrument according to the sheet music information being reproduced.

For this, when more detailed configuration of the application unit 110 is described, as shown, the application unit 110 may include a determination unit 114, an acoustic analysis unit 111, a score analysis unit 113, and a reproduction unit 112. It may include.

First, the acoustic analysis unit 111 may recognize the performance sound by receiving the sound signal received from the microphone unit 120, generate performance analysis information on the recognized performance sound, and provide it to the determination unit 114. .

In addition, the acoustic analysis unit 111 converts the acoustic signal received from the microphone unit 120 into a frequency domain through Fourier transform as shown in FIG. The component can be detected, and the frequency component detected over time can be compared with frequency information for each pre-set performance sound to generate performance sound information for the performance sound corresponding to the frequency component.

In addition, the acoustic analysis unit 111 compares the code setting information for the chords of one or more string instruments preset based on the performance sound information generated in chronological order, and generates performance chord information for the chords of the currently played string instrument. can do.

As an example, the acoustic analysis unit 111 may be preset code setting information for one or more guitar chords composed of one or more performance sounds, as shown in FIG. 4, and one or more performance sound information generated according to a time sequence The chord information may be compared with the chord information, and chord information matching the performance sound information may be selected to generate performance chord information.

At this time, the frequency information and chord setting information for each performance sound set in the acoustic analysis unit 111 may be stored in the memory unit 140, and the acoustic analysis unit 111 may store information and performance sounds stored in the memory unit 140. The performance sound information and performance chord information may be generated by comparing information.

In addition to the above-described method, the acoustic analysis unit 111 compares the acoustic signal received from the microphone unit 120 with the sampling signal for each string of a string instrument previously stored in the memory unit 140, as shown in FIG. 3 (b). , Performance code information may be generated from a code matched to a sampling signal corresponding to an acoustic signal, and performance sound information may be generated based on a performance tone preset in the corresponding sampling signal.

Through the above-described method of FIG. 3, the acoustic analysis unit 111 may generate performance analysis information including the performance code information and performance sound information, and provide the performance analysis information to the determination unit 114. .

In the above-described configuration, the acoustic analysis unit 111 plays timing information on the starting point of the playing sound included in the sound signal, and intensity information according to the amplitude of the signal corresponding to the playing sound, based on the receiving time of the sound signal. It may be further included in the analysis information and provided to the determination unit 114.

In addition, the acoustic analysis unit 111 described above may be configured in the user device 100 separately from the application unit 110.

Meanwhile, the playback unit 112 may load and play any one of sheet music information previously stored in the memory unit 140 according to the user input through the user interface unit 130 receiving the user input.

In addition, the sheet music analysis unit 113 extracts sheet music code information, stroke information, chord sound information, beat information, strength information, etc. corresponding to the currently playing position from the sheet music information played through the playback unit 112 to analyze the sheet music Information may be generated and the score analysis information may be provided to the determination unit 114 as shown in FIG. 3.

Accordingly, the judging unit 114 compares the performance analysis information provided from the acoustic analysis unit 111 with the score analysis information provided from the score analysis unit 113 to determine whether or not the match is found, and the result information on the determined result It can be output through the output unit 150, thereby providing a user to determine whether or not the match between the score and the playing sound according to the reproduction order of the score.

At this time, the judging unit 114 may display and output the result information according to whether or not the match is in the corresponding position in the score information, so that the user can recognize the wrongly played part when playing the string instrument.

When the configuration of the above-described determination unit 114 is described in more detail through FIG. 5, as shown in FIG. 5 (a), the determination unit 114 includes a code comparison unit 200 and an individual sound comparison unit 300. And it may include a stroke comparison unit 400.

First, the chord comparison unit 200 compares the performance chord information included in the performance analysis information and the score analysis information and the score code information to determine whether they match each other.

Also, the individual sound comparison unit 300 may determine whether the performance sound information included in the performance analysis information and the code sound information included in the music score analysis information match each other.

At this time, the chord comparator 200 and the individual sound comparator 300 may measure a time difference between different performance tones based on timing information included in the performance analysis information and compare it with the beat information included in the score analysis information. Accordingly, it is possible to determine whether the beat according to the performance coincides with the beat according to the score.

As described above, the chord comparator 200 and the individual sound comparator 300 can output the result information for the determination result through the output unit 150 as shown in FIG. 3, and the performance analysis information and When the score analysis information is inconsistent with each other, the result information on the inconsistency may be output through the output unit 150. In addition, the code comparison unit 200 and the individual sound comparison unit 300 may display a discrepancy portion in the score information and provide the result information through the output unit 150.

In addition, the chord comparator 200 and the individual sound comparator 300 may output information including difference information on the difference in pitch height according to a mismatch between the performance sound information and the chord sound information.

On the other hand, the chord comparison unit 200 and the individual sound comparison unit 300 compare strength information included in the performance analysis information and strength information included in the music score analysis information, and determine whether the strength and weakness of each performance sound match or not. The information on the coincidence or disagreement can be included and output in the result information.

On the other hand, as shown in Figure 5 (a), the determination unit 114 further includes a stroke comparison unit 400, it is also possible to determine the accuracy of the stroke, the main playing method of the string instrument.

Referring to Figure 6 for an embodiment of this, the main method of playing a string is the method of raising or lowering several strings, and the operation of striking and lowering from the low-line side toward the high-line is called a 'down stroke'. The action of striking from the high-line side to the low-line is called the 'up stork'.

When playing according to the stroke method, a plurality of strings are sequentially sounded, so that a start sound and an end sound are generated.

Therefore, the sheet music analysis unit 113 confirms the code information from the sheet music information as shown in FIG. 6, generates stroke information including a start sound and an end sound corresponding to the code information, and provides it to the determination unit 114 Can be. At this time, the score analysis unit 113 may generate the stroke information only at a position where a stroke exists in the score information.

If the guitar is described as an example of the string instrument, in the case of the 'up stroke' for the C code, the score analysis section generates stroke information with 'sol' as the starting sound and 'degree' as the starting sound. , In the case of the 'down stroke' for the C code, it is possible to generate stroke information with 'degree' as the starting sound and 'sol' as the ending sound among 'degree, beauty, sole'.

According to the above-described configuration, the determination unit 114 determines whether stroke information for the stroke is included in the score analysis information received from the score analysis unit 113, and if the stroke information is included, the stroke comparison unit 400 In order to activate and determine the accuracy of the stroke main method, the stroke comparison unit 400 uses the start sound recognition unit 410, the end sound recognition unit 420, and the stroke determination unit 430 as shown in FIG. 5 (b). It can contain.

First, the start sound recognition unit 410 recognizes the start sound from a plurality of pieces of sound information sequentially received from the sound analysis unit at the time of receiving the stroke information included in the score analysis information, and then determines the stroke after generating the start sound information Provided by the unit 430, the end sound recognition unit 420 may recognize the end sound among the plurality of pieces of performance information, generate end sound information, and provide it to the stroke determination unit 430.

Accordingly, the stroke determination unit 430 may compare the start sound information and the end sound information received from the start sound recognition unit 410 and the end sound recognition unit 420 with the stroke information received from the score analysis unit 113, Accordingly, it is possible to determine whether the starting and ending sounds according to the stroke performance match the starting and ending sounds of the stroke according to the score information.

Thereafter, the stroke determination unit 430 may include a result of determining whether the strokes match or not in the result information and output the result through the output unit 150.

Through this, the present invention can provide a result of determining the accuracy of the stroke as well as determining the accuracy of the simple chord and the playing sound, and can guide the user to increase the playing accuracy.

On the other hand, when the stroke comparison unit 430 interoperates with the chord comparison unit 410 and the performance chord information included in the performance analysis information and the performance chord information included in the music score analysis information are inconsistent with each other, whether the stroke is matched according to the stroke information You may not judge.

In the above-described embodiment, the application unit 110 configured in the user device 100 may be configured in the service device 500 communicating with the user device 100.

When an embodiment of this is described with reference to FIG. 7, the application unit 510 configured in the service device, as described in the above-described embodiment, the acoustic analysis unit 511, the reproduction unit 512, the music analysis unit 513 And a determination unit 514.

At this time, the playback unit 512 transmits music list information to the user device 100, and transmits music score information for the selected music according to the user device selection information from the music list information to the user device 100 in a streaming manner. By doing so, the user device 100 can play score information.

Accordingly, the sheet music analysis unit 513 generates sheet music analysis information and provides it to the determination unit 514 as in the configuration of the sheet music analysis unit 113 configured in the user device 100 according to the reproduction of the reproduction unit 512. Can be.

In addition, the user device 100 may transmit an acoustic signal according to the performance of the string instrument through the microphone unit 120 to the service device 500 through a communication network, and the acoustic analysis unit 511 included in the service device 500 May receive the sound signal from the user device 100 and generate performance analysis information as in the above-described configuration of the sound analysis unit 111 configured in the user device 100 and provide it to the determination unit 514.

In addition, the determination unit 514 may also have the same configuration as the determination unit 114 configured in the user device 100, but may be configured to transmit result information to the user device 100 through a communication network.

8 is a flowchart of a method for a string playing guide according to the above-described embodiment, first of all, the user device 100 may play score information selected according to a user input among pre-stored score information (S1, S2).

In addition, the user device 100 may generate sheet music code information for the code of the string instrument corresponding to the currently played position according to the reproduction order of the sheet music information (S3).

In addition, when a stroke exists in the score information at a playback position corresponding to the score code information, the user device 100 may generate stroke information for the start and end sounds of the stroke corresponding to the score code information ( S3).

At the same time, the user device 100 receives the sound signal according to the performance of the string instrument through the microphone unit 120 (S4), processes the sound signal received through the microphone unit 120 to the currently played sound. It is possible to generate performance chord information for chords and strings of a string instrument (S5).

Thereafter, the user device 100 may compare the score code information and the performance code information to determine whether or not the match (S6), and if there is a mismatch, may output the result information for the mismatch (S7).

In addition, when the score code information and the performance code information coincide with each other, the user device 100 may output the result information for the match (S11), and when the stroke information is generated (S8), when the stroke information is generated Based on a plurality of performance sounds sequentially generated, a start sound and an end sound are recognized to generate the start sound information and the end sound information (S9), and the result information on whether or not match can be provided is compared with the stroke information. (S10, S11).

Next, the user device determines whether or not the reproduction of the music score information is ended (S12), and if not, the above-described configuration can be repeated until the reproduction of the music score information ends.

The method for guiding a string instrument according to an embodiment of the present invention can be written in a computer program, and codes and code segments constituting the computer program can be easily inferred by a computer programmer in the field. In addition, the computer program is stored in a computer readable information storage medium (computer readable media), the method for a string playing guide by being read and executed by a computer or a user device, a service device, etc. according to an embodiment of the present invention Can be implemented.

The information storage medium includes a magnetic recording medium, an optical recording medium and a carrier wave medium. A computer program implementing the method for a string playing guide according to an embodiment of the present invention may be stored and installed in the internal memory of a user device or a service device. Alternatively, an external memory such as a smart card storing and installing a computer program implementing a method for a string playing guide according to an embodiment of the present invention may be mounted on a user device through an interface.

In the above, preferred embodiments according to the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and various modifications can be made to anyone having ordinary knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention attached in the claims. .

The present invention improves the user's playing accuracy by judging the playing accuracy of the user playing the string instrument while reproducing the score, in particular, providing the accuracy even when playing according to the stroke method of the string instrument to provide more detailed information, music service It can be widely used in fields, various game service fields, and social networking fields.

10: stringed instrument 100: user device
110, 510: application unit 111. 511: acoustic analysis unit
112, 512: playback unit 113, 513: sheet music analysis unit
114, 514: judgment unit 120: microphone unit
130: user interface unit 140: memory unit
150: output unit 200: code comparison unit
300: individual sound comparison unit 400: stroke comparison unit
500: service device

Claims (9)

A microphone unit for receiving an acoustic signal according to the performance of the string instrument;
An acoustic analysis unit that processes the sound signal received through the microphone unit and generates performance sound information for the currently played performance sound and performance code information for the chord of the string instrument;
A reproducing unit for reproducing pre-stored score information selected according to user input;
Score code information for the chord of the string corresponding to the currently reproduced position according to the reproduction order of the score information through the reproducing unit, and a stroke starting sound of the stroke corresponding to the score code information when a stroke exists in the score information at the position A score analysis unit that generates stroke information for the and ending sounds; And
After receiving the performance code information and the score code information from the sound analysis unit and the score analysis unit, comparing them with each other to provide result information on whether or not they match, and based on the point in time when the stroke information is received from the score analysis unit. After starting and ending sounds are recognized from a plurality of pieces of performance information sequentially received from the sound analysis unit, start sound information and end sound information are generated, and compared with the stroke information, whether or not a match is included in the result information is provided. Judgment unit;
Including,
The acoustic analysis unit generates intensity information for the performance sound according to the amplitude of the acoustic signal and provides it to the determination unit,
The score analysis unit generates strength information about the strength and weakness of the chord sound corresponding to the currently played position according to the reproduction of the score information, and provides the strength information to the determination unit,
The determination unit compares the intensity information and strength information received from the sound analysis unit and the score analysis unit for each performance sound, and further includes information on whether the strength and weakness are matched for each performance sound in the result information, thereby providing a string instrument. User device for performance guide. delete delete delete delete delete An acoustic analysis unit receiving and processing an acoustic signal according to the performance of the string instrument from the user device to generate performance tone information for the currently played performance tone and performance code information for the chord of the string instrument;
A reproducing unit which transmits and plays selected score information to the user device according to selection information received from the user device among pre-stored score information;
Score code information for the chord of the string corresponding to the currently reproduced position according to the order of reproduction of the score information through the reproducing unit, and a start sound and an end sound corresponding to the score code information when a stroke exists in the score information at the position A score analysis unit for generating stroke information for the; And
After receiving the performance code information and the score code information from the sound analysis unit and the score analysis unit, comparing them with each other to generate result information on whether to match, and based on the point of time when the stroke information is received from the score analysis unit After generating the start sound and the end sound by recognizing the start sound and the end sound from a plurality of pieces of performance information sequentially received from the analysis unit, compare the stroke information and include whether the match is included in the result information and transmit it to the user device Judgment unit;
Including,
The acoustic analysis unit generates intensity information for the performance sound according to the amplitude of the acoustic signal and provides it to the determination unit,
The score analysis unit generates strength information about the strength and weakness of the chord sound corresponding to the currently played position according to the reproduction of the score information, and provides the strength information to the determination unit,
The determination unit compares the intensity information and strength information received from the sound analysis unit and the score analysis unit for each performance sound, and further includes information on whether the strength and weakness are matched for each performance sound in the result information, thereby providing a string instrument. Service device for performance guides. delete delete

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