KR102635826B1 - Auto Guitar that combines the components of a chord name to complete the chord - Google Patents

Abstract

The present invention is a stroke body unit that accommodates a stroke detection unit 130 consisting of six strings 110 for peak detection installed on the bridge of the main body 120 and a sensor 131 that recognizes each string separately during stroke or fingering. (100);
A fingerboard 210 is added to the stroke body 100, and there are no strings on the fingerboard 210. A button-type chord that is fingered by combining the main note, semitone, and first and second chord parts in the order of the chord on the surface of the fingerboard. A fingerboard keypad unit 200 formed with a code fingering unit 220 for pressing, a single note fingering unit 230 for pressing 12 single notes, and a control function unit 240 for selecting a code sound source and adjusting the sound speed;
It includes a controller 300 that recognizes strokes or fingerings and outputs a code sound source to the speaker 310 in conjunction with the control function unit 240, and is provided with corresponding buttons for each component in the code name notation. It is an automatic guitar that combines chords by fingering them simultaneously.

Description

An auto guitar that combines the chords by having corresponding buttons for each component in the chord name notation and fingering them simultaneously. {Auto Guitar that combines the components of a chord name to complete the chord}

The present invention relates to an auto guitar that is provided with corresponding buttons for each component in the code name notation and combines chords by simultaneously fingering them.

In general, until the 18th century, the shape of the guitar designed by Lacourt of France was common, and Torres and Santos Hernández developed it into a form that could be used in concert halls.

Guitars can be divided into acoustic guitars in Figure 1 and electric guitars in Figure 2.

The general way to play a guitar is to stroke or finger the 6th string in the sound hole of the main body with your right hand, and at the same time, look at sheet music or memorize the chord with your left hand to determine the 6th string position and the corresponding 12th fret fingering point. Sing the song according to the lyrics while holding the chords with your fingers.

As shown in Figure 3, the principle of the chord composition of the guitar consists of the key names (do, re, mi, fa, sol, la, si) and note names (C, D, E, F, G, A, B) of the piano keyboard. The chord composition sounds (1, 2, 3, 4, 5, 6, 7) of the corresponding sound can be expressed as the basic composition. Like a piano, an ontab has 7 notes on the white keys (C, D, E, F, G, A, B) and 5 notes on the black keys (C ^# , D ^# , F ^# , G ^# , A ^# ). In the guitar, 12 notes are realized by distinguishing each fret position, and various chords can be fingered at the same time. However, since the chords must be memorized one by one, mastery is required, and people with short or slow fingers require a lot of practice to get used to them. In addition, when fingering the chords, pain due to the tension of the strings makes fingering difficult, which is an obstacle to popularization. It works.

The code formula based on these code constituent sounds can be exemplified as shown in the following table.

A guitar that strokes while holding a chord like this has 6 strings for strokes in the main body, as shown in Korean Patent Publication No. 10-2009-85005, and the touch screen modulates 5 frets for chord modulation by touch to change the chord. It is convenient to use as it outputs in a way, but it is inconvenient to get used to because it has a completely different structure from existing guitars, and it is closer to a touch-type toy instrument than a guitar. In addition, a configuration in which there are no strings on the fingerboard and a switch that recognizes the fingering for each fret was developed as Domestic Patent Publication No. 10-1989-3412, except that there are no six strings and pressing the fingering points is the same, so the fingers do not hurt. There is no specificity.

In addition, a guitar that indicates the fingering point for the chord by lighting up with an LED in advance has been developed through domestic patent registration No. 10-1677050. Although it is convenient that you can play the guitar without knowing the chord, the content of the chord is played according to the chord progression of the song to be played. It is difficult to put it into practical use because it has to be inputted to the guitar in advance, and it is cumbersome to find and finger the fingering point according to the speed when the input content is played, that is, the stroke pitch, and it causes inconvenience in use.

The present invention aims to solve this problem. The purpose of the present invention is to provide a stroke body for strokes or fingering in the main body, and at the tip of the main body, there are components according to the chord notation on the fingerboard, that is, a main note button, a semitone button, and two groups of code names. There is a fingerboard keypad with buttons listed, and when the corresponding buttons on the fingerboard are pressed in combination, the completed chord is recognized through the controller, and the recognized chord chord is provided with a corresponding button for each component in the chord name notation so that it is output to the speaker. The goal is to provide an auto guitar that combines chords by fingering them at the same time.

Another object of the present invention is to provide a stroke main body for strokes or fingering in the main body, and at the tip of the main body, a fingerboard keypad with a main note button, a semitone button, and 2 groups of code name buttons is placed on the fingerboard, and a main note button, a semitone button, and 2 groups of code name buttons are placed on the fingerboard. The code name buttons in the group are distributed and arranged so that they can be pressed simultaneously by the index, middle, ring, and little fingers, and are equipped with corresponding buttons for each component of the code name notation to complete the code in combination, and can be fingered at the same time. The goal is to provide an auto guitar that combines chords.

Another object of the present invention is to provide a stroke main body for strokes or fingering in the main body, a fingerboard keypad with main and semitone buttons and two groups of code name buttons on the fingerboard at the tip of the main body, and the main body and fingerboard are connected by a hinge part. In addition, a fingerboard groove is placed on the rear of the main body so that the fingerboard can be folded back and accommodated in the fingerboard groove on the back of the main body, thereby reducing the length of the fingerboard and providing a corresponding button for each component in the code name notation for convenience of storage and movement. The goal is to provide an automatic guitar that combines chords by fingering them at the same time.

Another object of the present invention is to provide a stroke main body for strokes or fingering in the main body, and at the tip of the main body, a fingerboard keypad for fingering by pressing the main tone button, semitone button, and 2 groups of code name buttons on the fingerboard, and pressing the corresponding button on the fingerboard. When pressed in combination, the combined code is recognized through the controller, and the recognized code chord is equipped with a corresponding button for each component in the code name notation to select the sound source table or output from the module to the speaker as the corresponding sound source and selected pitch. The goal is to provide an auto guitar that combines chords by fingering them at the same time.

The present invention for this purpose includes a stroke body portion that accommodates a peak detection string installed on the main body bridge and a stroke detection portion with a sensor that recognizes strokes or fingerings;

A fingerboard is added to the stroke body, there are no strings on the fingerboard, and a fingerboard keypad portion is provided with corresponding buttons for each component in the code name notation on the surface of the fingerboard, and allows you to combine and play chords by fingering them at the same time;

It includes a controller that recognizes strokes or fingerings in the stroke detection unit and outputs the corresponding code sound source fingered on the fingerboard keypad unit to the speaker in conjunction with the control function unit, and has corresponding buttons for each component in the code name notation. The goal is to provide an automatic guitar that combines chords by fingering them at the same time.

As described above, the present invention has a stroke main body for strokes or fingering in the main body, and at the tip of the main body, a fingerboard keypad part with main and semitone buttons and two groups of code name buttons is placed on the fingerboard, and the corresponding buttons on the fingerboard are combined to When pressed, the completed chord is recognized through the controller, and the recognized chord chord is provided with a corresponding button for each component in the code name notation that is output to the speaker, and provides an auto guitar that combines chords by fingering them at the same time. .

The present invention has a stroke main body for strokes or fingering in the main body, and at the tip of the main body, a fingerboard keypad part is placed on the fingerboard with main notes, semitone buttons, and two groups of code name buttons, and the main notes and semitone buttons or code name buttons are provided on the fingerboard. They are distributed and arranged so that you can press them simultaneously with your index, middle, ring, and small fingers, so you can complete the code in a combination form. There are corresponding buttons for each component in the code name notation that even beginners can easily finger, and you can finger them all at the same time to combine the code. We provide an automatic guitar that plays.

The present invention has a stroke main body for strokes or fingering in the main body, and a fingerboard keypad part at the tip of the main body for fingering by pressing main tone buttons, semitone buttons, and 2 groups of code name buttons on the fingerboard, and the main body and fingerboard are joined by a hinge part. , there is a fingerboard groove on the back of the main body, so the fingerboard can be folded back and accommodated in the fingerboard groove on the back of the main body, shortening the length of the fingerboard for convenience of storage and movement.

The present invention has a stroke main body for strokes or fingering in the main body, and at the tip of the main body, a fingerboard keypad with main note buttons, semitone buttons, and code names listed on the fingerboard, and when the corresponding buttons on the fingerboard are pressed in combination, the completed chord is transmitted through the controller. The recognized code chord is an auto guitar that has corresponding buttons for each component in the code name notation that can be output from the module to the speaker by selecting the sound source table or the corresponding sound source and selected pitch, and combining the chords by fingering them at the same time. provides.

Figure 1 is a perspective view showing the names of common guitar components;
Figure 2 is a perspective view showing the name of the electric guitar;
Figure 3 is a diagram showing chord composition sounds on the piano keyboard;
Figure 4 is a perspective view of the present invention;
Figure 5 is a bottom perspective view of the present invention;
Figure 6 is an enlarged plan view of the main portion showing the fingerboard keypad portion of the present invention;
Figure 7 is an enlarged view of the main part showing the hinge axis of the present invention;
Figure 8 is a perspective view of the fingerboard of the present invention folded;
Figure 9 is a bottom perspective view of the fingerboard of the present invention folded;
Figure 10 is a perspective view showing the bullet point detection part,
Figure 11 is a schematic view omitting the main body cover;
Figure 12 is an explanatory diagram showing the code keypad portion and corresponding fingers of the present invention;
Figure 13 is a guitar code table,
14 is a fingering possible chord table of the present invention,
Figure 15 is a control block configuration diagram of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In one embodiment of the present invention, as shown in FIGS. 4, 6, and 11, a stroke detection system includes a peak detection string 110 installed on the bridge of the main body 120 and a sensor 131 that recognizes the stroke or fingering. Stroke body portion 100 accommodating portion 130;

A fingerboard 210 is added to the stroke main body 100, and there are no strings on the fingerboard 210. Corresponding buttons corresponding to each component in the code name notation are provided on the surface of the fingerboard, and the codes are combined by fingering them at the same time. Fingerboard keypad unit 200 for playing;

Includes a controller 300 that recognizes strokes or fingerings in the stroke detection unit 130 and outputs the corresponding code sound source fingered on the fingerboard keypad unit 200 to the speaker 310 in conjunction with the control function unit 240. It is composed by:

The corresponding buttons of the fingerboard keypad unit 200 include a chord fingering unit 220 for pressing button-type codes, a single note fingering unit 230 for pressing 12 single notes, and a control function unit 240 for selecting a chord sound source and adjusting the sound speed. ) and consists of

The code fingering unit 220 includes a main sounding unit 221 consisting of a main sounding button 222 for selecting the main chords of C, D, E, F, G, A, and B with the index finger,

A semitone section 225 arranged near the main note 221 to designate a semitone code (#, b) following the main note 221 and select the semitone button 224 as a stop,

A first code list 227 arranged near the semitone part 225 so that the code name button 226 following the main tone part 221 or the semitone part 225 can be selected with the ring finger,

A second code list ( 229).

In another embodiment of the present invention, as shown in FIGS. 5, 7, 8, and 9, the stroke body portion 100 and the fingerboard 210 of the fingerboard keypad portion 200 are hinged with a hinge portion 140. A fingerboard groove 150 is formed on the rear of the stroke body 100 for storing the fingerboard keypad portion 200 by folding it at the hinge portion 140.

The hinge portion 140 includes a hinge shaft 141 fixed to the tip of the stroke body portion 100 and a hinge hole 143 formed to enable hinge coupling to the hinge shaft 141, and the hinge shaft 141 ), a wire passing hole 142 is formed through which the wire of the fingerboard keypad unit 200 passes;

The tip of the stroke main body 100 has a fixed wall 145 that fixes the hinge axis 141 at both ends, and a fingerboard connection groove 147 formed between the fixed walls 145 to enable the hinge function of the fingerboard connection portion 212. ) and consists of

The fingerboard 210 constituting the fingerboard keypad unit 200 of the present invention is fixed (referred to as Embodiment 1 in FIGS. 4, 6, 10, and 11) and foldable (referred to as Embodiment 2 in FIGS. 5, 7, 8, and 9). It can be configured.

In Embodiment 2 of the present invention, the stroke body portion 100 and the fingerboard 210 of the fingerboard keypad portion 200 are hinged together with the hinge portion 140 as shown in FIGS. 7 to 9, and the rear of the stroke body portion 100 A fingerboard groove 150 is formed for storing the fingerboard keypad portion 200 by folding it at the hinge portion 140.

The hinge portion 140 includes a hinge shaft 141 fixed to the tip of the stroke body portion 100 shown in FIG. 7 and a hinge hole indicated by a dotted line in FIG. 8 to enable hinge coupling to the hinge shaft 141 ( 143), and a wire passing hole 142 is formed on the hinge axis 141 through which the wire of the fingerboard keypad unit 200 passes;

The tip of the stroke main body 100 is a fixed wall 145 shown in FIG. 7 to secure the hinge axis 141 at both ends, and a fingerboard connecting portion 212 is formed between the fixed walls 145 to enable a hinge function. It is configured to include a connection groove (147). In addition, for simplicity of construction, it is possible to configure the fingerboard keypad part 200 and the hinge part 140 as an integrated piece, which is not different from the spirit of the present invention.

The present invention includes a code fingering unit 220 in both Embodiment 1 and Embodiment 2, and the code fingering unit 220 has corresponding buttons for the codes C, D, E, F, G, A, and B, as shown in FIG. 6. and a jueum unit (221) consisting of a jueum button (222) for selecting the jueum with the index finger,

A semitone part 225 arranged near the main tone part 221 to select the semitone button 224, which is the corresponding button of the semitone code (#, b) following the main tone part 221, as a middle note,

A first code list 227 arranged near the semitone part 225 so that the code name button 226, which is a corresponding button following the main tone part 221 or the semitone part 225, is selected with the ring finger,

A second code placed near the first code list (227) so as to select the main note part (221) or the semitone part (225) or the code name button (228), which is a corresponding button below the first code list (227). It consists of a code list (229).

In addition, the single note fingering unit 230 forming the fingerboard keypad unit 200 has 12 single notes (C, C ^# , D, D ^# , E, F, F ^# , G, G ^# , A, A ^#) , as shown in FIG. ^, B) are each provided with a single tone button 232, which is a corresponding button for selecting B). When in use, when the performer of the present invention presses the single note button 232, which is the corresponding button, the single sound fingering unit 230 recognizes the sound through the communication control unit 303 of the controller 300 shown in FIG. 15 and produces the corresponding sound in the sound source unit 340. is selected and converted into an analog signal in the digital-to-analog conversion unit 301 and then output to the speaker 310, etc. through the audio amplifier 330. The operation of the string 110 struck by the stroke detection unit 130 is recognized by the sensor 131, and when the amplification is converted by the analog-to-digital conversion unit 302, the controller 300 recognizes each string as an octave. , the digital-to-analog conversion unit 301 converts it into an analog signal, amplifies it in the audio amplifier 330, and outputs it to the speaker 310. The communication module 350 operated by the communication control unit 303 is a device with standard communication functions such as Bluetooth and Wifi, and is used as a MIDI input device when composing or recording.

The functions and principles of the present invention constructed in this way will be explained.

The functional principle of the present invention is not to implement the chord by pressing the string of the corresponding fret with the finger, but to select the chord in a combination form by pressing the corresponding button in order from the main notes that make up the chord to match the name of the chord to be fingered. It's a method. For this purpose, a single note fingering unit 230 consisting of a single note button 232, which is a corresponding button for selecting notes for a melody; The first code consists of a main tone part 221 made up of a main note button 222, which is a corresponding button for a chord, a semitone part 225 made up of a semitone button 224, which is a corresponding button, and a code name button 226, which is a corresponding button. A code finger section 220 consisting of a second code list 229 consisting of a list 227 and a code name button 228, which is a corresponding button; The control function part 240, which consists of a control button 242, which is a corresponding button for sound source selection and speed selection, is divided into a fingerboard keypad part 200 arranged so that it can be fingered.

The reason why this distinction is convenient is because in sheet music, the code name (Am, C#m7, Dsus4, etc.) is written at the top of the staff at the position where the harmony changes.

That is, in the guitar of the present invention, a fingerboard keypad part 200 of the corresponding button type was completed so that the guitar can be fingered by combining chords without memorizing the chord form.

A keypad with a corresponding button for selecting a code is implemented as a fingerboard keypad unit 200, which assigns a meaning to each finger of the left hand in the order of the naming letters of the code and is fixed as shown in Figure 12, so that fingering is performed in a combination form. Let's do it.

With the index finger shown in Figure 12, the main key button 222, which is the corresponding button shown in Figure 6, is fingered to indicate the root of the codes A, B, C, D, E, F, and G, and whether or not the middle finger is fingered is checked. The final drink is determined accordingly.

With the middle finger shown in FIG. 12, the semitone button 224, which is a corresponding button marked to select the semitone of the # and b chords, is fingered.

With the ring finger shown in Figure 12, you can press (finger) the code name button 226, which is the corresponding button for selecting a code name (m, M, sus4, dim, aug (m, M can be fingered simultaneously)), and if there is no code name part in your possession, Complete the code in combination.

As shown in FIG. 12, the code is completed in combination by pressing (fingering) the code name button 228, which is the corresponding button for selecting the code name 7, 5, 9, 6 (7 and 5 can be fingered simultaneously).

For example, in the case of C#m7, press the 'C' semitone button (222) with finger number 1 (index finger), press the '#' semitone button (224) with finger number 2 (middle finger), and press 'm' with finger number 3 (ring finger). You can press the 'code name button (226) in combination with the '7' code name button (228) simultaneously.

In the case of F7, press the 'F' main button (222) with finger number 1 (index finger) and the '7' code name button (228) with finger number 4 (small finger) at the same time. By doing this, theoretically musically meaningful 12 key((C, C ^# , D, D ^# , E, F, F ^# , G, G ^# , A, A ^#, B)) x 16 code names (Major, Minor, m7, M7, mM7, 7, m7-5, 7+5, sus4, 7sus4, dim, aug, 6, m6, 9, M9) = 192 types of codes are provided, so the general requirement level in Figure 13 It is possible to implement the guitar code table by fingering as shown in Figure 14, and if the 'two-name homophone code' is calculated separately, 272 types of codes can be fingered as code names.

In order to play the guitar, one must memorize guitar chord forms in advance, such as the general required guitar chord table shown in Figure 13, which is not only a high barrier but also stressful for those learning the guitar. Not only are there so many different types of chords, but even for chords with the same name, there are various chord forms depending on the location, so it should be said that no performer actually knows all the chords.

The present invention allows anyone to easily access and learn the guitar without the stress of memorizing chords, which is an absolute prerequisite for playing the guitar, by dividing all chords into left-hand fingers without memorizing them and selecting the chord names in order by pressing the corresponding buttons to create musical sounds. Most valid codes can be selected, and the selected code sound is recognized through the controller 300, and the code name notation is configured to produce the effect of outputting the code sound to the speaker 310, earphones, or other line out terminal. A fingerboard keypad 200 with corresponding buttons corresponding to the elements arranged is provided to eliminate the need for code memorization.

In addition, by effectively classifying and assigning corresponding buttons to each finger to analyze each element that makes up the code name, unified fingering is possible in the form of a combination by pressing the corresponding corresponding button for each finger for all codes, quickly and in a short period of time. You will be able to learn the location of the keyboard and how to use it. The fingerboard keypad allows you to finger not only classical music based on triad harmony consisting of 1, 3, and 5th degrees, but also most chords of modern music based on quadrature chords consisting of 1, 3, 5, and 7. (200) is provided.

In addition, in order to enable melody performance separately from the chord stroke, all 12 notes with a semitone interval constituting one octave are provided to the single note fingering unit 230 as a single note button 232, and the controller 300 recognizes this and plays the sound source unit. You can play a melody sound by finding the corresponding sound source at 340 and outputting it to the speaker 310. At this time, the corresponding string of the stroke detection unit 130 is selected so that the 1st to 6th strings cover each octave. By recognizing the string of 110) as the corresponding sensor 131 and recognizing it as the corresponding octave in the controller 300, a wide range of up to 6 octaves can be output to the speaker 310, making it possible to play even a single note. This means that it includes not only the regular guitar, but also the low register of the bass guitar and the high register of the ukulele, making it possible to use it as a replacement for the bass guitar and ukulele.

To this end, the sampling sound table of the instrument is stored in the sound source unit 340 so that the sounds of various types of instruments, such as bass guitar, nylon guitar, steel guitar, electric guitar, and ukulele, can be switched and used.

The present invention, unlike the existing traditional guitar, which has a range of notes that can be played by a guitar, that is, all notes corresponding to a total of 3 octaves, has a button corresponding to 12 notes that make up one octave. Since it has only a single note fingering section 230, the variety of playing is limited compared to existing guitars that have multiple blocks to produce the same sound, but it has the advantage of being much easier to learn and enabling a consistent performance method. Due to this difference from existing guitars, the present invention is technically similar to existing guitars when playing chord strokes and distributed chords, but when playing single notes, the playing method is completely different from existing guitars. Although it has a similar shape to a traditional guitar, it can also be said to be a completely different new instrument.

In addition, in the present invention, even in the tuning part, which is one of the fields that beginners find difficult, the sound of the string does not directly determine the height of the sound, but only determines the starting point and intensity of the sound. Afterwards, the input is analyzed and the sound source unit (340) is used in advance. ), it reproduces the sound of the WaveTable or sound source module built in, so it always produces a sound with the correct pitch, so there is no worry about the tuning being off, so tuning is unnecessary even though it is a string instrument.

Due to the effect of the present invention, unlike existing guitars where the 6 strings of the guitar must be long across the neck and body, the guitar of the present invention only needs to have strings in a short area of the area for striking strings (or strokes using a pick), so that the guitar's 6 strings are long across the body and body. Since the fingerboard area can be separated, it becomes possible to implement a folding guitar as shown in Figures 7 and 8, thereby dramatically reducing the storage size of the guitar. In fact, in an example of the present invention, if a folding guitar is implemented, the overall size is reduced to about A4 size and can be carried in a regular briefcase or backpack, greatly increasing mobility.

100; stroke body 110; string 111; front bridge 112; mute sponge 113; rear bridge 120; main body 130; stroke detection unit 131; sensor 140; hinge unit 141; hinge axis 142; wire passing hole 143; hinge hole 145; Fixed wall 147; connection groove 150; fingerboard groove 200; fingerboard keypad part 210; fingerboard 212; fingerboard connection part 220; code fingering part 222; main note button 224; semitone button 225; semitone section 226; code name button 227; first code list. 228; code name button 229; second code list 230; single note finger section 232; single note button 240; control function section 242; control button 300; controller 310; speaker

Claims (6)

A stroke body portion 100 that accommodates a peak detection string 110 installed on the bridge of the main body 120 and a stroke detection portion 130 including a sensor 131 that recognizes strokes or fingerings;
A fingerboard 210 is added to the stroke main body 100, and there are no strings on the fingerboard 210. Corresponding buttons corresponding to each component in the code name notation are provided on the surface of the fingerboard, and the codes are combined by fingering them at the same time. Fingerboard keypad unit 200 for playing;
Includes a controller 300 that recognizes strokes or fingerings in the stroke detection unit 130 and outputs the corresponding code sound source fingered on the fingerboard keypad unit 200 to the speaker 310 in conjunction with the control function unit 240. and;
The corresponding buttons of the fingerboard keypad unit 200 include a chord fingering unit 220 for pressing button-type chords, a single note fingering unit 230 for pressing 12 single notes, and a control function unit 240 for selecting a chord sound source and adjusting the sound speed. It consists of:
The code fingering unit 220 includes a main sounding unit 221 consisting of a main sounding button 222 for selecting the main chords of C, D, E, F, G, A, and B with the index finger,
A semitone section 225 arranged near the main note 221 to designate a semitone code (#, b) following the main note 221 and select the semitone button 224 as a stop,
A first code list 227 arranged near the semitone part 225 so that the code name button 226 following the main tone part 221 or the semitone part 225 can be selected with the ring finger,
A second code list ( 229), an auto guitar that is provided with corresponding buttons for each component in the code name notation, and combines chords by fingering them simultaneously.
delete delete The method of claim 1, wherein the stroke body portion 100 and the fingerboard 210 of the fingerboard keypad portion 200 are hinged together with a hinge portion 140, and the fingerboard keypad portion 200 is provided on the rear of the stroke body portion 100. Forming a fingerboard groove 150 for storage by folding it backwards at the hinge portion 140;
The hinge portion 140 includes a hinge shaft 141 fixed to the tip of the stroke body portion 100 and a hinge hole 143 formed to enable hinge coupling to the hinge shaft 141, and the hinge shaft ( 141) is formed with a wire passage hole 142 through which the wire of the fingerboard keypad unit 200 passes;
The tip of the stroke main body 100 has a fixed wall 145 that fixes the hinge axis 141 at both ends, and a fingerboard connection groove 147 formed between the fixed walls 145 to enable the hinge function of the fingerboard connection portion 212. ) An auto guitar that is provided with corresponding buttons for each component in the code name notation and combines codes by fingering them simultaneously. delete delete