KR930008568B1 - Auto-accompaniment code generating method in an electronic musical instruments - Google Patents

Abstract

The method comprises a first step of magic song routine for receiving a chord keyboard information to make and finish tone discrimination and major harmony to be played according to a chord keyboard information by a microcomputer determining whether a chord keyboard separated into a chord part and a melody keyboard part is received or not upon turning on a magic chord switch under the state of turning off a rhythm on/off switch and an automatic bass chord on/off switch, and a second step of generated chord routine for comparing the received melody with the major harmony made in the first step by the microcomputer determining whether the melody keyboard input of a keyboard input portion occurs to determine and select a chord corresponding to the result of the comparison when a melody keyboard information is received upon turning on the rhythm on/off switch.

Description

Automatic Accompaniment Code Generation Method in Electronic Musical Instruments

1 is a block diagram of an automatic accompaniment code generator applied to the method of the present invention.

2 is a main flow chart for explaining the method of the present invention.

3 is a subflow chart of the group determination routine of FIG.

4 is a subflow chart of the main chord table creation routine of FIG.

5 is a flowchart of a generation code routine for comparing the input melody of FIG. 2 with the main chord to output the code having the highest priority.

6 is a structural diagram of main chord creation table for explaining the present invention.

Fig. 7 is a code construction tone and a code progress table of a storage unit showing a state in which a chord code is recorded in accordance with the group input information in the storage unit to be applied to the present invention.

8 is an exemplary embodiment in which a code is selected according to the melody input information by the method of the present invention.

9 shows an example of a part of the accompaniment area keyboard for code input.

* Explanation of symbols for main parts of the drawings

1: microcomputer 2: sound generator

3: filter section 4: amplifier section

5: Output part (speaker) 6: Keyboard input part

7: rhythm on / off switch

8: Auto Bass Chord On / Off Switch

9: magic code on / off switch 10: memory part

The present invention relates to a method for generating automatic accompaniment chords in an electronic musical instrument, in particular, even if a chord lacks performance in playing an electronic musical instrument with an automatic accompaniment or a chord (chord) without any chord input. As the process progresses, it automatically generates or selects the most appropriate code to achieve a good auto accompaniment effect.

In the conventional electronic musical instrument capable of performing auto accompaniment, a function such as the method of the present invention which automatically assigns a chord as the melody progresses is not provided, and the chord input is divided into the chord keyboard part and the melody keyboard part playing the melody. For example, in the melody, press the key corresponding to the 'degree' of the code keyboard when entering the 'C' code, and enter the key corresponding to the 'degree' of the code keyboard when entering the 'Cm' code. By simultaneously pressing any key located on the right side of the keyboard, each time a melody was played, an appropriate chord was improvised.

However, in order to use the auto accompaniment, such a conventional method must be aware of the change in chord according to the progress of the melody, and if the beginner lacks the playing ability or only plays the melody without knowing the chord of the song to play If you do not use the auto accompaniment, and also requires a certain amount of playing skills to enter the chords, there was a problem that it is difficult to obtain a harmonious auto accompaniment effect with the melody.

In the present invention, in consideration of the above-described problems of the conventional method, the keyboard itself is assigned as a melody key in the state of playing without auto accompaniment according to the selection of function keys (rhythm, auto bass chord, magic chord switch), or the melody in the auto accompaniment state. To create the typesetting and main chords of the song to be played divided into and chord section, and to automatically output the main melody and chords (chords) corresponding to the melody input by a program of adjustment that compares the main melody with the input melody. It is an object of the present invention to provide an automatic accompaniment chord generation method in electronic musical instruments that can achieve a good auto accompaniment effect even if a beginner who does not know the chords performs. The invention method will be described in detail.

As shown in Figs. 1 and 2, the method of the present invention provides a microcomputer when the magic code switch 9 is turned on while the rhythm on / off switch 7 and the automatic bass code on / off switch 8 are turned off. (1) determines the chord keyboard input presence of the keyboard input section 6 divided into the chord keyboard section and the melody keyboard section, and when chord keyboard information is inputted, a table of typesetting and main chords to be played according to the chord keyboard information inputted. A first step of the magic song routine to create and end; When the rhythm on / off switch (7), the automatic bass code on / off switch (8) and the magic code switch (9) are turned on, the microcomputer (1) determines the presence of the melody keyboard input of the keyboard input unit (6) to determine the melody keyboard information. When is input, it is characterized in that it consists of a second process of the generation code routine for comparing the melody input from time to time and the main chord created by the first process to determine and select the code corresponding thereto.

In the method of typesetting of the first process magic song routine described above, as shown in FIG. 3, the microcomputer scans the accompaniment area keyboard of the keyboard input unit 6 and enters the micro selection key of the group input means described in the score. (1) is a first step of changing from the memory unit 10 a value specifying an address location to suit the inputted pair to distinguish the code progress information recorded for each pair; When the tempo clock is turned on, the melody area key determines whether a new pitch is input, and when a new pitch is input, the code containing the pitch is searched in the memory unit for the code configuration of the memory unit 10 to store all candidate codes. The next candidate code and the code progress information stored in the code progress memory section of the memory unit 10 are sequentially compared from the highest code, and if the same code is included in the candidate codes, the output code is changed to a new code and finally output. And a second process of determining a code, outputting the pronunciation processing data to the sound generator 2, and repeatedly scanning the accompaniment area keyboard to be input next.

In addition, as shown in FIG. 4, in the method of preparing the main chord table of the first process magic song routine, the microcomputer 1 corresponds to the minor and the major according to the input code key information of the keyboard input unit 6, respectively. The main chord is created and stored in the memory in the microcomputer 1.

In addition, as shown in FIG. 5, in the generation code routine of the second process, the microcomputer 1 regards the root sound or the lowest sound as the root sound according to the input melody key information of the keyboard input unit 6. If the root melody of the melody is not the first melody of the bar and the melody is the component of the chord currently being output, the chord does not change; otherwise, the chord and melody are initialized sequentially after the output chords, position buffers, and position samples are initialized. To compare the position buffer Otherwise, the position buffer value is moved to the position sample at the same time as the chirp code is output, and the position buffer value is If it is compared with the accompanying chord and melody, if there is no same note in the position buffer, it compares the substring and subchord chords sequentially.If there is the same note in the position buffer, the main chord with higher priority according to the loudness And selecting and outputting the selected main chord, and storing the position buffer value in the position stream and ending. The reference numeral 2 in FIG. 1 receives a control signal from the microcomputer 1 to generate a tone waveform. 3 is a filter unit for filtering the signal output from the sound generator 2, 4 is an amplifier for amplifying the output signal passed through the filter unit 3, 5 is an amplifier unit (4) A speaker (output unit) for converting a signal amplified by the signal into a sound source, and 10 is a memory unit.

Referring to Figs. 1 to 9, the effect of the method of the present invention configured as described above will be described. First, the rhythm on / off function switch 7 for controlling the rhythm start and stop and the automatic bass for controlling the automatic bass code generation. When both the chord on / off enable switch 8 and the magic chord on / off function switch 9 which controls the generation of the magic chord are turned off, the microcomputer 1 performs rhythm and auto bass chord output while playing without auto accompaniment. At the same time, the entire keyboard input section 6 is assigned to the melody keyboard section.

In addition, when the rhythm on / off function switch 7 is turned on and the automatic bass code on / off switch 8 and the magic code on / off switch 9 are turned off, the rhythm is output, but the automatic bass code and magic code are output. This also assigns the entire keyboard input section 6 to the melody keyboard section as described above.

In addition, unlike the above, when the rhythm on / off function switch 7 and the automatic bass code on / off switch 8 are turned on, and the magic code on / off switch 9 is turned off, the microcomputer 1 performs rhythm and At the same time as the automatic bass code output, the automatic accompaniment state is switched to divide the keyboard input unit 6 into a melody keyboard section and a chord keyboard section, and the automatic bass code is converted in accordance with the code input.

In addition, when the rhythm on / off switch 7 and the automatic bass code on / off switch 8 are turned off, and the magic code on / off switch 9 is turned on, the microcomputer 1 is divided into a chord keyboard part and a melody keyboard part. According to the key input information of the key input unit 6, the main program of the method of the present invention is performed.

That is, as shown in FIG. 2, if the keyboard input of the code keyboard is performed by detecting the keyboard input of the code keyboard unit or the melody keyboard, the typesetting magic song routine is performed as shown in FIG. When the accompaniment area keyboard of (6) is scanned and the group selection key of the group input means described in the score is input, the microcomputer 1 is recorded for each group in the code structure sound storage unit and the code progress storage unit of the memory unit 10. To distinguish the code progress information, change the value that designates the address location as appropriate for the entered pair.

Then, when a tempo clock is generated, the microcomputer 1 detects whether a new pitch is being input from the melody area keyboard. When a new pitch signal is input, the microcomputer 1 stores a code in which the pitch data is stored as shown in FIG. The code structure of (10) is retrieved from the storage unit to store all candidate codes.

In this way, the code progress information as shown in FIG. 7b is compared with the best code stored in the code progress memory of the memory unit 10, and the next rank progress code is read when there is no same code among the candidate codes. Repeat the above best chord comparison process, and when comparing the best chords sequentially, if the newly input pitch and the candidate code are the same chord, change the output chord to a new chord and at the same time, After determining and outputting the pronunciation processing data to the sound generating unit 2, the process returns to the process of scanning the next accompaniment region keyboard and repeats the above process.

For example, as shown in FIG. 8, since the song set is a 'C' major, the 'C2' key of the chord input key (accompaniment area keyboard) as shown in FIG. 8, or ' Press the key of C3 'to input' Joe ', and select the code progress memory part of C major as shown in Fig. 7B by the pointer.

Then, if the first note 'G' code is pressed by installing the kisscan of the melody area, the 'G', 'Em', and 'G' codes of the codes belonging to the 'G' candidates in the chord sound storage unit as shown in FIG. 7a are candidates. Since the current code is the C major in the code progress memory of the candidate code as shown in FIG. 7b, among the candidate codes, the highest code among the codes starting with 'C' is determined as the final code to generate the sound. Let's do it.

Then, perform the melody scan again and input the changed note 'A'. The candidate code becomes 'Dm', 'F', 'Am', and the last code is outputted 'F'. In the final code among the candidate codes 'Dm', 'I', and 'G', 'G' is output.

In addition, if the melody keyboard is input in the melody area, a code generation routine for comparing the input melody as shown in FIG. 5 with the main chords produced by the magic song routine and outputting a code suitable therefor is performed.

In this state, if the keyboard input of the keyboard unit 6 is the chord keyboard input of the chord keyboard unit, the set of songs to be played to enter the magic chord is determined as in the fourth step. After determining whether the song to be played is, for example, the major or the minor, the key is input through the chord keyboard section divided by the keyboard input unit 6.

At this time, if the code keyboard input of the code keyboard unit is, for example, the 'la' keyboard and the 'hour' keyboard, the microcomputer 1 judges the singular minor, and if the 'do' keyboard is input, it is determined as the major major.

When the pair of songs to be played is determined as described above, the microcomputer 1 makes each major chord according to the minor or multiple majors, and stores them in the main chord table of the memory in the microcomputer 1. As shown in FIG. 6, that is, in the case of a major major, the chief chord of 'Domisoldo' is called 'C' code, and the accompanying chords of 'Solsi Lepa' is called 'G7' code and 'Padorapa'. 'F' chords, the basic major triads, and the most commonly used 'Radomira' chords are made of 'Am' chords. It is edited by Am ',' E7 ',' Dm 'and' C 'codes and stored in the memory of the microcomputer (1).

After setting the typesetting and main chords of the song to be played in this way, turn on the rhythm on / off switch (7), automatic bass chord on / off switch (8), and magic chord on / off switch (9). As shown in Figs. 2 and 5, when the chord key is pressed, the magic song routine on the magic chord is performed as described above, and when the melody key is pressed, the chord is automatically selected and output according to the keyboard information. The process of selecting the code to output when executing the routine is as follows.

That is, when the melody is input from the melody keyboard as shown in FIG. 5, the microcomputer 1 determines the number of input melody keys and compares them with the components of each chord in the main chord table as shown in FIG. Done.

If the input melody according to the comparison result is the root of the chord, the priority to select the chord is the highest. If the input melody is two or more keys, the lowest note is regarded as the first root, and if the second note is the second, If it is the same as the third note, it is regarded as the third root note and the highest priority chord is output according to the comparison result among the main chords.

For example, if the song you are currently playing is major in melody and 'sol' is entered, the 'G' chord is the highest priority among the main chords, and the 'G' chord is output. If it is not in the chord table, the output code remains unchanged.

In this way, the above priority is limited to the melody first inputted in a new node, and the chord does not change when the melody is not the first melody and the melody is currently composed of the currently output chord. Will change the code.

For example, if the currently output code is 'C' code and the melody input is 'Sol', the output code is selected as it is unless it is the first melody of the new node, and the melody is For the first note, the G7 chord is selected.

In the process of selecting the input melody and the code created as described above, if the root melody of the melody is not the sound of the chord currently being output, the microcomputer 1 initializes the output code, the position buffer and the position sampling value, Compare and melody.

Here, in the output code, the code type with the highest priority is recorded, and the position buffer contains the same contents as the position thumb, but varies with each code. For example, the composition of the 'C' code when compared with the 'C' code If the melody is 'degree', the position buffer value is '4'. If the melody is 'mi', the position buffer value is '3'. If the melody is 'sol', the position buffer value is If it is not '7' code, the position buffer value of '1' is not compared. If the melody is 'wave', the position buffer value is not equal among the components of the 'C' code. Becomes

In addition, the position sample contains the same value as the position buffer, but the difference between the position buffer and the melody is that the same configuration sound position of the code having the highest priority is compared with the code, and the position buffer includes the code of the recently compared code. Contains the location of the component sounds, such as melody.

In other words, the position sample contains the position of the chords of the chord in the output code, and compares the new chord and the melody to the new value in the position buffer. If it is larger than this position sampling value, the recently compared code has a higher priority, so the value of the position buffer is moved to the position sampling side, and the value of the output code is also converted to the value of the new code. Therefore, by comparing the melody and the main chords by the above operation and determining the priority, after determining the priority, the highest priority code is output.

As described above, according to the method of the present invention, six chords among the basic triads that can come from each group are selected, and the priority of the chords is the next chord among the chords following the current chord. Decisions and auto accompaniment give you confidence in the performance of beginners who are poor at playing, or any song that you do not know how to play chords, and automatically responds to the melody as it progresses, even if you do not enter a separate chord (chord) from the accompaniment area. By selecting chords and outputting them, the auto accompaniment effect and beginners can easily perform great performances.

Claims (4)

When the rhythm on / off switch 7 and the automatic bass cord on / off switch 8 are turned on and the magic code switch 9 is turned on, the microcomputer 1 divides the keyboard and the melody keyboard into a key input unit 6. A first step of the magic song routine for determining whether a chord key is inputted in the chord and inputting chord key information to create and end typesetting and major chords to be played according to the input chord key information; When the rhythm on / off switch (7), the automatic bass chord on / off switch (8) and the magic code switch (9) are turned on, the microcomputer (1) determines the presence of the melody keyboard input of the keyboard input unit (6) to determine the melody keyboard information. When is input, the auto accompaniment in the electronic musical instrument comprising a second process of the generation code routine for comparing the melody input from time to time and the main chords produced by the first process to determine and select the corresponding code How to generate code. The method according to claim 1, wherein the major chord creation magic song routine discriminates the minor and the major in accordance with the information on the number of key codes of the keyboard input unit 6, and generates the respective major chords corresponding to the minor and major. 1) A method of generating auto accompaniment codes in electronic musical instruments, characterized in that they are stored in a memory within. 2. The typesetting magic song routine scans the accompaniment area keyboard of the keyboard input unit 6, and when a group selection key such as musical compensation is input, the microcomputer 1 records each group from the memory unit 10 for each group. A first step of changing a value for designating a street address according to an inputted set so as to distinguish code progress information; When tempoclock is turned on, the melody area keyboard determines whether a new pitch is input, and searches for the code containing the new pitch in the chord memory section of the memory unit 10 to store all candidate codes, and then stores the candidate code and memory. The code progress information stored in the code progress storage section of the section 10 is sequentially compared with the best code first, and if the same code is included in the candidate codes, the output code is changed to a new code, and at the same time, the code to be finally output is determined to generate a sound. And a second process of outputting sound generation data to the unit (2), and repeatedly scanning the accompaniment area keyboard to be input next. The method according to claim 1, wherein the generation code routine regards the root note or the lowest note as the root note according to the input melody key count information of the keyboard unit 6, and after determining whether it is the first melody of the new node, the root note of the melody is present. If the chord is not changed in the case of the chord being output, if the chord is not configured, the output chord, position buffer, and position thumb are initialized in sequence, and then the position buffer value is compared by comparing the main chord and the melody. Otherwise, while outputting the chirp chord, the position buffer value is moved to the position sample, and the position buffer value If it is compared with the accompanying chord and melody, if there is no same note in the position buffer, it compares the substring and subchord chords sequentially.If there is the same note in the position buffer, the main chord with higher priority according to the loudness A method of generating an auto accompaniment code in an electronic musical instrument, the method comprising: selecting, outputting a selected main chord, and storing and ending the position buffer value in the position spring.