CN2146764Y - Computer guitar - Google Patents

Abstract

The utility model discloses a computer guitar with a digital indicating on a finger handhold. The digital indicating changes following the played melody. The computer guitar comprises a roll call displayer, a selecting melody keypad, a single-chip microcomputer, a program storage, a latch unit, parallel interfaces, etc. The computer guitar provides a new device of not remembering the left finger method and the roll call for guitar learning and playing.

Description

Computer guitar

The utility model relates to electronic musical instrument, more specifically to a kind of based on micro computer, the computer guitar that shows with the number of corresponding each roll call of mode can be provided in each string step-by-step place that guitar refer to.

Common guitar has by the common guitar of resonant tank sounding and the computer guitar by electronics public address system sounding.Both refer on the layout of chord similar, refer to that being " black box " concerning the beginner, each roll call is not easy the step-by-step on each string to grasp referring under the different modes, and this " black box " change irregularly again infinitely, bring very big difficulty for beginner's study.

The purpose of this utility model is micro computer is used for referring to provide on the handle number of roll call to show at the guitar that can be any, thereby provides a kind of guitar that makes to refer to the string position is become ash bin by " black box ", is convenient to the computer guitar that the beginner learns to play.

The purpose of this utility model is achieved in that structure computer guitar comprises: by the common guitar that refers to handle, resonant tank and refer to last string is constituted, this computer guitar is characterised in that also and comprises:

The roll call display of forming by the digital display tube of 6 * 12 arrays (2) that in each string step-by-step of the finger handle of described guitar, is provided with;

Being located at being used on the described guitar resonant tank imports the keypad of recruiting (3) of playing tune; And

Be contained in the control circuit board in the described resonant tank, this control panel comprises chip microprocessor 8031, program storage 2716 parallel interfaces 2825 and latch 74373, and the P1 mouth of described chip microprocessor 8031 is connected with the described keypad of recruiting (3); The data inlet of described 8031 the P0 mouth and the data input pin of described latch, described program storage 2716 data terminals and parallel interface 8255 is connected, A0, the A1 end of described 8031 P2 mouth and the high address end of described program storage 2716 and parallel interface 8255 is connected, the output terminal of described latch 74373 is connected to the low order address input port of described program storage 2716, and three output ports and the described roll call display (2) of described parallel interface 8255 join.

Implementing computer guitar of the present utility model learns and plays for guitar brand-new equipment is provided, use this computer guitar, can significantly reduce human brain to the left hand fingering and refer to the memory capacitance of the roll call of each step-by-step, make exercise and performance become a very gravy jobs, be the universal condition of having created of music and guitar.

With reference to accompanying drawing, in conjunction with the embodiments, feature of the present utility model is described further.In the accompanying drawing:

Fig. 1 is when playing the big accent song of A, and the finger of computer guitar of the present utility model is the demonstration of last each string step-by-step correspondence roll call;

Fig. 2 is the schematic appearance of the utility model computer guitar;

Fig. 3 is the principle schematic of the utility model computer guitar;

Fig. 4 is a programming flowchart in the used single chip microcomputer in the utility model computer guitar.

As depicted in figs. 1 and 2, the difference of computer guitar and common guitar is exactly to refer to each string (1) digital demonstration of step-by-step having increased (2) on the handle, that is with 1,2,3,4,5,6,7 clearly illustrate a roll call, make the beginner when playing, can be reacted to each string step-by-step very soon by the music score of Chinese operas, when tune also corresponding the changing of roll call of each step-by-step of each string simultaneously not, and fix in the roll call that refers to each step-by-step on the handle under the same mode, the major function that this computer guitar is finished is exactly the different tunes of being pressed on the keypad of recruiting (3) according to the player, correspondingly show each the complete roll call under this accent, for circuit for simplicity, the lifting relation of each roll call of the same name, this circuit does not add demonstration, example: "

", "

", " 5 ", all be shown as " 5 ", also need remember this user, Fig. 1 shows and plays big accents of A when bent, refers to last roll call demonstration.

Among Fig. 3,8031 is one chip microcomputer, 2716 is program storage, 74373 is latch, is used for latching low eight bit address, and 8255 is parallel interface, shared A, B, C three group octet mouths, circuit is formed Single Chip Microcomputer (SCM) system by 2716,74373,8,031 three integrated circuit, and as the charactron display interface, keypad (3) is directly by 8031 P1 mouth gated sweep by 8255 parallel interfaces.As shown in the drawing, the keypad of being made up of 10 buttons of recruiting (3) is connected with the P1 mouth of described single-chip microcomputer 8031, the P0 mouth of this single-chip microcomputer 8031 and the data terminal D0～D7 of latch 74731, data terminal D0～the D7 of program storage 2716, data terminal D0～the D7 of program storage 2716 and the data terminal D0～D7 of parallel interface 8255 link together, low 3 high address end A8～A10 that are connected to program storage 2716 in the P2 port of the single-chip microcomputer 8031 in the P2 port of single-chip microcomputer 8031, low 2 P2 in the P2 port of single-chip microcomputer 8032,0 and P2,1 with the A0 of described parallel interface 8255, the A1 end, described latch 74373 latch low order address end A0～A7 that output terminal Q0～Q7 is connected to program storage 2716, three parallel port of described parallel interface 8255 are linked the described roll call display of being made up of 6 * 12 digital display tubes (2).

Earlier according to mode, from keypad (3) input tune title, micro computer promptly correspondingly shows the roll call under this accent the user before playing melody.Only need click the key of recruiting when needing to modify tone in the music playing process recruits again and gets final product.

Explain procedure for displaying now.Owing to be the chromatic scale relation between 3,4 and 1,7, having 12 kinds of scales relations in 1,2,3,4,5,6,7 is 1,1 ^#, 2,2 ^#, 3,4,4 ^#, 5,5 ^#, 6,6 ^#, 7, and we only show 1,2,3,4,5,6,7 in demonstration, and according to the corresponding change demonstration of different tunes, the charactron of all demonstrations can be divided into 12 groups like this, all charactrons of every group all show same numbers, 12 groups show in only 7 groups effective, all the other 5 groups is the chromatic scale position, charactron does not have demonstration.Like this, we adopt the common cathode charactron on the circuit, the anode of all charactrons (a, b, c, d, e, f, g) all is parallel-connected to 8255 A mouth, 8255 by A mouth output stroke content to charactron, negative electrode is then in parallel by group, all with the charactron of roll call and the roll call of mutual deviation octave as one group, charactron in every group shows identical, totally 12 groups, be connected to 8255 B mouth and C mouth low four, totally 12 lines are taken turns scan flow.Outputing to 8255 can increase current driving circuit as 74245 etc. between the charactron.

Claims (1)

1, a kind of computer guitar comprises: by the common guitar that refers to handle, resonant tank and refer to last string is constituted, this computer guitar is characterised in that also and comprises:

The roll call display of forming by the digital display tube of 6 * 12 arrays (2) that in each string step-by-step of the finger handle of described guitar, is provided with;

Being located at being used on the described guitar resonant tank imports the keypad of recruiting (3) of playing tune; And

Be contained in the control circuit board in the described resonant tank, this control panel comprises chip microprocessor 8031, program storage 2716 parallel interfaces 2825 and latch 74373, and the P1 mouth of described chip microprocessor 8031 is connected with the described keypad of recruiting (3); The data inlet of described 8031 the P0 mouth and the data input pin of described latch, described program storage 2716 data terminals and parallel interface 8255 is connected, A0, the A1 end of described 8031 P2 mouth and the high address end of described program storage 2716 and parallel interface 8255 is connected, the output terminal of described latch 74373 is connected to the low order address input port of described program storage 2716, and three output ports and the described roll call display (2) of described parallel interface 8255 join.

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