JP2000163065A - Code advance generating device and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a code advance generating device simply generating a code advance consisting of various kinds by providing a supply means for supplying the code advance consisting of only a few basic codes and an other code generation means for generating the other code advance based on the supplied code advance. SOLUTION: When a user selects an 'automatic generation method' (S1), automatic generation processing is executed (S2), and the code advance inputted with a keyboard and switch operation by the user is stored in a code advance input buffer secured on a prescribed position of a RAM (S3). Then, the code advance selected by the user is loaded to the code advance input buffer (S4). Succeedingly, when the user specifies the deformation method of the code advance by operating a prescribed switch of a panel switch (S5), the specified deformation method is inputted to the work area of the RAM. Then, the code advance deformation processing according to the inputted deformation method is executed (S6), and the deformed code advance is presented to the user (S7).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chord progression generating apparatus and a storage medium capable of easily generating a chord progression composed of various types of chords (chords).

[0002]

2. Description of the Related Art Conventionally, the following two types are known as main methods for generating a chord progression composed of various types of codes. That is, 1) a method of generating a target chord progression by storing all chord progressions composed of various codes in a database and reading out a chord progression that meets predetermined conditions from the database 2) using a predetermined arithmetic algorithm Method to generate the desired chord progression by using the calculation

[0003]

However, in the method 1) of the above-mentioned conventional chord progression generation methods, it is necessary to construct a database so as to include all the chord progressions to be generated. It was huge. Therefore, the storage medium for storing such a database must have a capacity corresponding to the storage medium.
The construction of the database also required a great deal of effort.

[0004] In the conventional chord progression generation method 2), the problem of the method 1), that is, the problem that the database capacity becomes enormous, is solved, but the method is musically difficult. It is very difficult to generate a meaningful chord progression only by operation, and no operation algorithm has been found. Furthermore, even if such an arithmetic algorithm is found, it is very complicated, and even with the current standard CPU power, it will not be able to handle the processing. , Increasing the manufacturing cost.

The present invention has been made in view of this point, and it is an object of the present invention to provide a chord progression generating apparatus and a storage medium which can easily generate various types of chord progressions.

[0006]

In order to achieve the above object, a chord progression generating apparatus according to claim 1 comprises: a supply means for supplying a chord progression consisting of only a small number of basic codes; By changing at least some of the base code to a non-base code,
And another code generation means for generating another chord progression based on the supplied chord progression.

Here, the small number of basic chords are typically the main chords (I, IV, V7), but are not limited thereto, and the main chords may be sub-chords (IIm, IIIm, VIm, VII7 ( ♭
5)) may be added to the seven codes (all diatonic codes in the same key), and a plurality of other types of codes may be used as the basic code.

As a method of supplying a chord progression consisting of only the basic chords, for example, 1) a database is constructed by various chord progressions created in advance, and a desired chord progression (that is, a chord progression that satisfies a condition) is selected from the database. 2) A method of generating and supplying a target chord progression by operation based on a predetermined simple operation algorithm, 3) A method of supplying a target chord progression by direct input by a user, 4 A method of supplying a desired chord progression by loading existing chord progression data from a predetermined location (predetermined storage medium, server, or the like) can be considered.

With respect to the capacity of the database, in the method 1), since the database only stores the chord progression consisting of only the basic code, the capacity is much smaller than the capacity of the conventional database described above. In the method 2), since the database itself is not required, a storage medium for storing the database can be omitted.

[0010] In addition, a first stage for supplying a chord progression consisting only of a basic chord, and a second stage for generating another new chord progression by modifying the chord progression, provide various types of chords. Since the chord progression is generated by using the chord progression generated in this way, for example, when generating a melody and wishing to slightly change the melody, the second
If the melody is to be transformed again in the stage and the melody is to be changed drastically, another chord progression may be generated in the first stage. it can.

As a method of changing the basic code to a code other than the basic code, for example, 1) a method of replacing the basic code with a substitute code, 2) a method of replacing the basic code with a secondary dominant code, and 3) a method of replacing the basic code A method of changing the chord progression so as to be a cyclic chord progression, 4) a method of changing a basic chord such that the chord progression is a continuous dominant progression, and 5) a change of the basic chord so that the chord progression becomes a sequential chord progression. Can be changed, but the method is not limited to this, and any method may be adopted as long as it can change a small number of basic codes to codes other than other various kinds of basic codes. .

The basic code to be changed may be all or part of the basic code included in the chord progression. In the latter case, the problem is how to select some basic codes to be transformed. For example,
A method is conceivable in which a ratio of the number of basic chords to be transformed to the total number of basic chords of the entire music piece is set, and a number corresponding to this ratio is assigned to the entire music piece for selection. This allocation is performed, for example, by 1) a completely random method, 2) a random method with conditions (eg, a predetermined number of codes at the beginning or end of a song is not subjected to transformation), and 3) a predetermined condition. 4) A method of performing according to a preset assignment rule, or the like.

The above points regarding claim 1 are the same even if the claims are changed.

According to a second aspect of the present invention, there is provided a chord progression generating apparatus.
An operation generating means for performing operation generation of a code progression consisting of only a small number of basic codes based on a predetermined operation algorithm, and changing at least a part of the basic code of the operation generated code progression to a code other than the basic code And another code progression generating means for generating another chord progression based on the chord progression generated by the calculation.

According to a third aspect of the present invention, there is provided the chord progression generating apparatus,
The other chord progression generation means changes a code existing in a section excluding a predetermined section in a chord progression consisting of only the basic code to a code other than the basic chord.

[0016] The chord progression generating device according to claim 4 is
The other chord progression generation means changes a code having a predetermined ratio of the total number of chords included in a chord progression consisting of only the basic chord to a code other than the basic chord.

The chord progression generating device according to claim 5 is
A plurality of types of change methods for changing the basic code to codes other than the basic code are provided, and a selection unit for selecting any one of the plurality of types of change methods is provided. The basic code is changed to a code other than the basic code according to the changing method.

A chord progression generating device according to claim 6 is
A connection type determining means for selecting and determining a connection type between each section of the music piece composed of a plurality of sections from a plurality of different connection types, and connecting the respective sections based on the determined connection type; And a code progression generating means for generating a chord progression of a portion other than the code of the determined combination portion in each section.

A chord progression generating device according to claim 7 is
A connection type determining means for selecting and determining a connection type between each section of the music piece composed of a plurality of sections from a plurality of different connection types, and connecting the respective sections based on the determined connection type; Code determining means for selecting and determining a code in a section from a small number of basic codes, and a code for generating a code progression of a part other than the code of the determined connecting section in each section using a small number of basic codes. Progress code generating means and other code code generating means for generating another code code based on the generated code code by changing at least a part of the basic code of the generated code code to a code other than the basic code code And characterized in that:

In order to achieve the above object, a storage medium according to claim 8 comprises a supply module for supplying a code sequence consisting of only a small number of basic codes, and a supply module for supplying at least a part of the supplied code sequence. And a code generation module for generating another code progression based on the supplied code progression by changing the code to a code other than the basic code.

According to a ninth aspect of the present invention, there is provided a storage medium, comprising: an operation generating module for generating and generating a code progression consisting of only a small number of basic codes based on a predetermined arithmetic algorithm; and at least a part of the operation generated code progression And an other code progression generation module for generating another code progression based on the calculated and generated code progression by changing the basic code to a code other than the basic code.

According to a tenth aspect of the present invention, in the storage medium, a connection type determination module for selecting and determining a connection type between each section of a song composed of a plurality of sections from a plurality of different connection types, and A code determination module that determines a code in a connection portion of each section based on the obtained connection type, and a code progress generation module that generates a code progression of a portion other than the code of the determined connection portion in each section. It is characterized by including.

A storage medium according to claim 11, wherein a connection type between each section of a song composed of a plurality of sections is selected from a plurality of different connection types to determine the connection type; A code determining module for selecting and determining a code in the connection part of each section from a small number of basic codes based on the connection type, and a part other than the code of the determined connection part in each section. A chord progression generation module for generating a chord progression using a small number of basic chords, and at least a part of the generated chord progression is changed to a code other than the basic chord, so that the chord progression is generated based on the generated chord progression. And an other chord progression generation module for generating another chord progression.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a chord progression generating apparatus according to one embodiment of the present invention.

As shown in FIG. 1, the chord progression generating apparatus according to the present embodiment includes a keyboard 1 for inputting pitch information,
A panel switch 2 including a plurality of switches for inputting various information; a key press detection circuit 3 for detecting a key press state of each key of the keyboard 1; and a switch for detecting a press state of each switch of the panel switch 2 A detection circuit 4, a CPU 5 for controlling the entire apparatus, a ROM 6 for storing a control program executed by the CPU 5, table data, and the like, and a RAM 7 for temporarily storing performance data, various input information, calculation results, and the like. A timer 8 for measuring the interrupt time and various times in the timer interrupt processing, and displaying various information and the like;
For example, large liquid crystal display (LCD) or CR
A display device 9 including a T (Cathode Ray Tube) display and a light emitting diode (LED), a floppy disk drive (FDD) 10 for driving a floppy disk (FD) 20 as a storage medium, and various types including the control program. A hard disk drive (HDD) 11 for driving a hard disk (not shown) for storing application programs, various data, etc., and a compact disk for reading various application programs including the control program, various data, etc.
C that drives only memory (CD-ROM) 21
A D-ROM drive (CD-ROMD) 12 and an external MIDI (Musical Instrument Digital Interface)
e) A MIDI interface (I / F) 13 for inputting a signal or outputting a MIDI signal to the outside, and a communication interface (I / F) for transmitting / receiving data to / from a server computer 102 via the communication network 101, for example. ) 14, a tone generator circuit 15 for converting performance data input from the keyboard 1 or preset performance data and the like into a tone signal, and an effect circuit 16 for imparting various effects to the tone signal from the tone circuit 15. And the effect circuit 16
To convert the sound signal from the sound into a sound, for example, DAC
(Digital-to-AnalogConverter), an amplifier, and a sound system 17 such as a speaker.

The above components 3 to 16 are mutually connected via a bus 18, a timer 8 is connected to the CPU 5,
Another MIDI device 100 is connected to the MID II / F 13, a communication network 101 is connected to the communication I / F 14, an effect circuit 16 is connected to the sound source circuit 15, and a sound system 17 is connected to the effect circuit 16. ing.

As described above, the control program executed by the CPU 5 can be stored in the hard disk of the HDD 11, and when the control program is not stored in the ROM 6, the control program is stored in the hard disk. By reading into RAM7, ROM
6 can cause the CPU 5 to perform the same operation as when the control program is stored. This makes it easy to add a control program, upgrade a version, and the like.

CD-ROM of CD-ROM drive 12
The control program and various data read from 21 are
The data is stored on the hard disk in the HDD 11. This makes it possible to easily perform new installation, version upgrade, and the like of the control program. In addition to the CD-ROM drive 12, a device for utilizing various forms of media, such as a magneto-optical disk (MO) device, may be provided as an external storage device.

The MIDII / F13 is not limited to a dedicated one, but may be RS-232C, USB (Universal Serial Bus), IEEE1394 (I Triple E 139).
It may be constituted by a general-purpose interface such as 4).
In this case, data other than the MIDI message may be transmitted and received at the same time.

As described above, the communication I / F 14 is connected to a communication network 101 such as a LAN (Local Area Network), the Internet, or a telephone line.
It is connected to the server computer 102 via the communication network 101. If the above-mentioned programs and various parameters are not stored in the hard disk in the HDD 11, the communication I / F 14
02 to download programs and parameters. The computer serving as a client (in the present embodiment, the chord progression generating device) is a communication I / F.
14 and a command for requesting download of a program or parameter to the server computer 102 via the communication network 101. The server computer 102 receives the command, distributes the requested program and parameters to the computer via the communication network 101, and the computer
Receive these programs and parameters via H
By accumulating the data on the hard disk in the DD 11, the download is completed.

In addition, an interface for directly exchanging data with an external computer or the like may be provided.

Although the chord progression generating apparatus according to the present embodiment is realized on a general-purpose personal computer (PC) having a standard hardware configuration as described above, the present invention is not limited to this. And CD-ROM
It may be realized on a mobile PC in which D12 is omitted. Furthermore, it may be configured not as a general-purpose PC but as a dedicated device.

The control processing executed by the chord progression generating apparatus configured as described above will be described in detail below with reference to FIGS.

The chord progression generating apparatus according to the present embodiment firstly generates 1) a basic chord progression (a chord progression composed of a plurality of predetermined basic codes), and then 2) this basic chord progression. Is transformed (re-harmonized) using a code not included in the basic code, thereby generating a target chord progression, that is, a chord progression composed of various types of codes. Here, the basic chord refers to the main chords of “I”, “IV”, and “V7” in the present embodiment (in the case of a major key).

In the present embodiment, there are four methods of generating the above 1): a) two methods by automatic generation, b) a method by manual input, and c) a method of loading existing data. Is adopted. The two types of a) are, specifically, i) constructing a database having basic chord progression data in advance, and searching the database to find the desired chord progression data. And ii) a method of generating target chord progression data by calculation according to a predetermined calculation algorithm.

As the re-harmonizing method of the above 2), in the present embodiment, a) a method of replacing a basic code at a position matching a predetermined condition with a substitute code, and
b) The method adopts two methods of replacing a basic code at a position that meets a predetermined condition with a secondary dominant code.

FIG. 2 is a flowchart showing the procedure of the main routine executed by the chord progression generating apparatus of the present embodiment, particularly, the CPU 5.

In the figure, first, the user is inquired about a chord progression generation method (step S1). In the present embodiment, the chord progression generation method includes the above 1) a) to
c) There are three types, and the user selects one of them by operating a predetermined switch of the panel switch 2, for example.

When the user selects the "automatic generation method" in step S1, an automatic generation processing subroutine, which will be described later with reference to FIG. 3 (or FIGS. 4 and 5), is executed (step S2). When the "method" is selected, the chord progression input by the user operating the keyboard 1 or a switch (for example, a predetermined switch of the panel switch 2) is stored in a chord progression input buffer secured at a predetermined position of the RAM 7, for example. (Step S3) When the user selects the “existing data loading method”, for example, the chord progression data previously stored in a predetermined storage medium according to factory settings or user settings, and selected by the user, The data is loaded into the chord progression input buffer (step S4).

In the subsequent step S5, the user operates a predetermined switch of the panel switch 2, for example, to change the chord progression (re-harmonizing method),
That is, if any one of the above 2) a) and b) is designated, the designated transformation method is used, for example, in the RAM.
7 is input to the work area.

In step S6, a chord progression transformation processing subroutine described later with reference to FIG. 6 is executed, that is, a chord progression transformation processing according to the inputted transformation method is executed. In step S7, the transformation result is obtained. (Modified chord progression) is presented to the user. As the presenting method, for example, a method of displaying the transformed chord progression on the display device 9 or sequentially generating the constituent sounds of the chords constituting the transformed chord progression can be considered. Of course, the present invention is not limited to this, and any method may be used as long as the user can clearly grasp the deformation result.

In the following step S8, the user is asked whether or not the presented deformation result is satisfactory. The user operates a predetermined switch of the panel switch 2, for example, and is dissatisfied with the result. When the answer is yes, the process proceeds to step S9, and the user is inquired whether or not to re-designate the chord progression transformation method.

In step S9, if the user responds that the transformation method is to be re-designated, the process returns to step S5, and a series of processes from selection designation of the transformation method of the chord progression to presentation of the transformation result (steps S5 to S7) ) Is performed again, and when the user replies that the currently designated chord progression transformation method is acceptable, the process returns to step S6, and processing from the chord progression transformation processing to the presentation of the transformation result (steps S6 and S7) Again.

On the other hand, in step S8, when the user answers that he is satisfied with the presented transformation result, the process proceeds to step S10, and asks the user what the purpose of the generated chord progression is. There are three types of uses of the chord progression of the present embodiment: 1) automatic music, 2) automatic accompaniment, and 3) chord display. The user operates a predetermined switch of the panel switch 2, for example. , One of which can be selected.

In step S10, the user selects "automatic music".
Is selected, an automatic song is performed based on the generated chord progression by a known technique (step S11). When the user selects "automatic accompaniment", an automatic tune is generated based on the generated chord progression by a known technique. The accompaniment is performed (step S12), and when the user selects "chord display", the generated and presented chord progress is displayed on the display device 9 (step S13). Here, as a display mode of step S13, for example, display in a musical score format or a songbook format,
Alternatively, a keyboard may be displayed, and a key pressing instruction for the displayed keyboard may be considered. LED corresponding to each key of the keyboard 1
Is provided, a key press instruction using the LED, specifically, a key press instruction by turning on the LED may be used.

In the following step S14, data generated according to the use specified by the user, that is, in step S11, the melody data composed, and in step S12
In step S13, the user is asked whether or not the displayed accompaniment data is satisfactory. As a result, when the user replies that the user is unsatisfied, the process proceeds to step S15, and the user is inquired as to whether or not the user wants to make a significant change.

When the user responds in step S15 that he or she wants to make a significant change, the process returns to step S1 and
The process from the input instruction of the generation method of the chord progression is performed again, and when the user replies that he does not want to change so much, the process returns to the step S9, and the process from the inquiry of the re-designation of the deformation method is performed again.

On the other hand, in step S14, when the user answers that the generated data is satisfactory,
Predetermined data as required, that is, generated chord progression data and data generated according to the use specified by the user (either composed melody data, accompaniment accompaniment data, or displayed data). (Step S16), the main routine ends.

FIG. 3 is a flowchart showing a detailed procedure of the automatic generation processing 1 which is an example of the automatic generation processing subroutine of the step S2. The automatic generation processing 1 is the automatic generation processing of 1) a) i). It is an implementation of the method.

In the figure, first, when a user inputs a chord progression generation condition, the input condition is stored in, for example, a work area of the RAM 7 (step S2).
1). Here, the chord progression generation condition is, for example, the number of syllables, the phrase configuration, and the like. The phrase composition is the same
The similarity relationship indicates the configuration of each phrase. For example, when a phrase is represented by the symbol "A", the phrase configuration differs from the phrase configuration (that is, there is no identical / similar relationship). A phrase is represented by a symbol "B", a phrase having the same phrase configuration as this phrase is represented by a symbol "A", and a phrase having a similar phrase configuration to this phrase is represented by a symbol "A '" or "A"".
(“A ′” and “A ″” have different degrees of similarity, meaning that the former is more similar to “A” than the latter.) In step S21, the user sets the number of syllables , The symbol such as "A" or "B" is input as a phrase configuration.

Next, chord progression data that satisfies the input generation condition is searched from the database and extracted (step S22). The database includes, for example, basic chord progression patterns (eg, “I”, “IV”, “V”) for one song created for various numbers of passages and passage configurations.
7 "(for example, in C major," C "," F "," G
A number of chord progression patterns composed only of the main chords of 7 ”) are classified and stored in advance according to the number of passages and the passage configuration. Therefore, if the user inputs the number of passages and the passage configuration, The corresponding chord progression data can be easily retrieved and extracted from the database, and the chord progression pattern registered in this database is a basic one, that is, a simple one. The capacity is much smaller than that of the conventional database, that is, the database constructed by a chord progression pattern composed of various kinds of codes.

When the user selects any of the chord progression data candidates extracted in this way, the selected chord progression data is stored in the chord progression input buffer (step S23), and then the automatically generated chord progression data is generated. Processing 1 ends.

FIG. 4 is a flowchart showing a detailed procedure of the automatic generation processing 2 which is another example of the automatic generation processing subroutine of the step S2.
Implements the automatic generation method of 1) a) ii).

In the figure, first, when the user inputs chord progression generation conditions including the number of passages, the input generation conditions are stored in, for example, a work area of the RAM 7 (step S31). Here, unlike the chord progression generation condition input in step S21 of the automatic generation processing 1, the number of passages is set as an essential input element because the number of passages is used in the subsequent processing.

Next, a phrase configuration that satisfies the input generation condition is determined (step S32). As a decision method,
For example, 1) a phrase configuration database having elements of a phrase configuration template created in advance for each number of phrases is constructed, and a phrase configuration template corresponding to the generation condition input from the phrase configuration database is searched. A method of determining a target phrase configuration using the described phrase configuration, 2) A method of determining a target phrase configuration by calculation according to a predetermined calculation algorithm (for example, randomly or conditionally random for each phrase) To determine a passage symbol). Note that only one of the above methods 1) and 2) may be fixedly set, or the user may be able to select either one of the methods.

Next, the connection type between each passage is determined and
A connection pattern for the music is generated, and the generated connection pattern is stored in the connection pattern buffer secured in the RAM 7 (step S33). In this embodiment, three types of connection types, types 1 to 3 described below, are prepared as connection types. In this step S33, one of the connection types is determined for each passage. To generate a combined pattern of the entire song.

In the type 1, since the preceding passage is completed (including the incomplete termination) and completed (V7 → I progress), the degree of freedom of chord progression to the next passage (target passage) is high. (However, it is natural that the priority of the appearance frequency progresses in the order of 4 times, 1 time, and 5 times.) Indicates the join type, and type 2 is the dominant last code of the previous clause and semi-end. (V7), a strong sense of ending is required for the next chord (the first chord in the target passage), and a dominant progression (fourth progress) to the next chord indicates a connection type. The last chord does not fall into any of types 1 and 2 (for example, IV), and there is no request for chord progression to the next passage (target passage) (but the priority of appearance frequency is 5, 1; It is natural to proceed in the order of twice) Ip is shown.

The types 1 to 3 are assigned to each phrase. Specifically, for example, the phrases are A, B, A
(Typical passage composition of "question" in the first A, "resolution" in the next B, and return to A again to emphasize A)
When composed of passages, the first passage (A) and the second passage
The connection to the phrase (B) is of type 2 and the second to third
For the connection to the passage, a connection pattern of type 1 is often used. Of course, the present invention is not limited to this, and a different type from the above example may be positively assigned to each passage in order to generate a variety of songs.

In consideration of the above points, in the present embodiment, as a method of generating a connection pattern, 1) a connection pattern database having elements of a typical connection pattern created in advance for each passage number is constructed. 2) a method of generating by performing a search from the connection pattern database at random or in accordance with a user's instruction; 2) a method of generating by a calculation according to a predetermined calculation algorithm (for example, a connection type is randomly determined for each passage) Either is adopted. Needless to say, the present invention is not limited to this, and information on the combination pattern may be described in the phrase configuration template. Further, the user may be able to select either one of the above methods 1) and 2).

In the following step S34, step S33
Executes a connection code determination subroutine (described later with reference to FIG. 5) for determining the code of the connection based on the connection pattern generated in the above, ie, the connection type between the phrases.
In step S35, after the chord progression of a portion other than the joint portion in each passage is generated by the following method, the automatic generation processing 2 ends. 1) Construct a chord progression pattern database having a basic chord progression pattern created in advance for each passage as an element, and among the chord progression patterns stored in the chord progression pattern database, A method of randomly selecting and generating a phrase that matches a head code and a final code of the phrase (the respective codes are determined by the processing of step S34) 2) A method of generating by calculation according to a predetermined calculation algorithm (for example, a code Changeable timing (1 beat,
One of the basic chords is randomly determined for each of two beats, one bar, etc.) One of the above methods 1) and 2) may be fixedly set, or one of the two methods may be fixed. The method may be selectable by the user. Further, in the method 1), the chord progression pattern registered in the chord progression pattern database is based on a phrase, but is not limited thereto, and may be a finer unit. 2)
When the method of (1) is adopted, a) the same chord is continued up to a predetermined number of times (for example, twice), b) one or more progresses that go up four full times in one passage, and c) the frequency of occurrence of the chord is I , V7, and IV in order, and the chord progression may be generated so as to meet this condition. Further, in any of the methods 1) and 2), if the phrase configuration of the target phrase has the same relationship as the phrase configuration of the earlier phrase (the phrase whose chord progression has already been generated), It is preferable that the passage has the same chord progression as the same passage.

FIG. 5 is a flow chart showing a detailed procedure of the subroutine code determination processing subroutine in step S34. This processing is performed in accordance with the generated connection type. This determines the head code of the passage K + 1.

In the figure, first, the head code of the head passage is determined to be "I" (step S41).

Next, a software counter K provided in the work area of the RAM 7 is initialized (K ← 1) in order to designate a passage to be processed (step S4).
2).

Then, the K-th connection type in the connection pattern (the connection type from the K section to the K + 1 section) is read from the connection pattern buffer and loaded into a predetermined temporary storage buffer (step S43). Then, it is determined which of the types 1 to 3 is the type (step S44).

In step S44, the connection type is type 1
In the case of, the last two chords of the K section are made to progress from "V7" to "I" (step S45), and the top code of the K + 1 section is determined at random (step S4).
6). In step S46, the code is not determined completely at random, but is determined conditionally randomly based on the priority of the appearance frequency (for example, progression of 4 times, progress of 1 time, progress of 5 times). Is more preferred.

In step S44, the connection type is type 2
In this case, the last code of the K section is set to "V7" (step S47), and the first code of the K + 1 section is set to "I" (step S48).

In step S44, the connection type is type 3
In the case of (1), the last code of the K section is determined at random (step S49), and the first code of the K + 1 section is determined at random (step S50). Step S
At 50, instead of completely randomly determining the code, the occurrence frequency is prioritized (eg, progression 5 degrees,
It is more preferable to determine the condition randomly based on the first progress and the second progress).

In a succeeding step S51, it is determined whether or not K indicates a passage one passage before the last passage. If K does not indicate a passage one passage before the last passage, that is, if processing is not performed, If there is a phrase to be left, the value of K is incremented by "1" (step S52), and the process returns to step S43 to repeat the above-described processing. When it is shown, that is, when there is no phrase to be processed, the last two codes of the K + 1 phrase are changed from "V7" to "I" (step S53), and then the final connection part code determination processing is ended. .

FIG. 6 is a flowchart showing a detailed procedure of the chord progression transformation processing subroutine of the step S6. This processing realizes the two types of reharmonization methods 2) a) and b).

Before describing the chord progression transformation processing in detail based on a flowchart, its outline will be described. The chord progression transformation processing of the present embodiment is configured based on the following technical idea. That is, 1) the first and last two chords of the music are not deformed (this is because the beginning and the end of the music are parts that clarify the tonality of the music). 2) The music is deformed by a predetermined ratio of the whole music. 2 ') In the phrase whose phrase symbol is "A", replacement with the secondary dominant code is not performed. 3) Complete stop appears for a predetermined ratio of the entire song. The number of chords of the whole music excluding the last two chords is calculated (step S61), and this chord number is determined, for example, in an area X secured in a work area of the RAM 7 (hereinafter, this content is referred to as "chord number X"). (Step S62).

Next, the number of chords X is multiplied by a predetermined coefficient (corresponding to the ratio of the whole music to be transformed) a (a positive number equal to or less than 1; for example, 0.5), and the result is defined as Xa ( Step S63). Since Xa indicates the total number of codes to be transformed (replaced), it is hereinafter referred to as the modified code total Xa.

Next, the user is inquired about which transformation method, ie, a) a transformation method using a substitute code, or b) a transformation method using a secondary dominant code (step S64). ), When the user responds that it is deformed by the method of a),
While executing the processing of steps S65 to S67, if the answer to the effect of the deformation in the method b) is answered, the processing proceeds to step S68.
To S70.

In step S65, the total number of transformed codes Xa is assigned to each passage. The allocation method is, for example, 1)
A method of randomly allocating, 2) a conditionally random allocating method, 3) a method of setting a ratio of the number of chords to be allocated to each passage (or a finer predetermined unit (eg, bar)), and a method of allocating according to the ratio. Can be considered.
When using the phrase configuration template, this ratio may be described in each phrase configuration template, or may be set freely by the user. Further, it is preferable that the same passage is allocated at the same ratio.

In step S66, a code (position) to be replaced at random is determined based on the number of deformed chords allocated to each passage (however, except for the first and last two chords of the music), and the chord is substituted. Replace with code.

In step S67, it is determined whether or not the appearance frequency of complete termination is equal to or higher than a predetermined ratio (for example, about 30%).
Returning to 66, the replacement process with the substitute code is performed again, and when the appearance frequency ≧ the predetermined ratio, the present code progression / deformation process ends.

In step S68, as in step S65, the total number of transformed codes Xa is assigned to each passage. However, no assignment is made to a phrase for which "A" is set as a phrase symbol.

In step S69, each passage (however,
Determines the chord (position) to be replaced randomly based on the number of transformed chords allocated to the section where "A" is set (excluding the last chord of the song)
And replace that code with the secondary dominant code. Here, it is not described except that the first chord of the song is excluded. However, this is because the phrase to which "A" is set always includes the leading phrase, and since this phrase is not subject to transformation, This is because if it is described only that the last chord is removed, it means that the first and last chords of the music are automatically removed.

In step S70, similarly to step S67, it is determined whether or not the appearance frequency of complete termination is equal to or higher than a predetermined ratio (for example, about 30%). And perform the replacement process with the secondary dominant code again,
When the appearance frequency ≧ the predetermined ratio, the present chord progression / deformation processing ends.

In this embodiment, step S67 is performed.
If the frequency of appearance <the predetermined ratio, step S66
However, the present invention is not limited to this, and may return to step S63 (the same applies to step S70).

In the present embodiment, step S66
In the above, the code at the determined code position is replaced with the corresponding proxy code, but if there are a plurality of corresponding proxy codes, one of them is selected by random, user's instruction or predetermined priority. It is sufficient to determine it.

Further, in the present embodiment, either one of a method of transforming with a substitute code and b) a method of transforming with a secondary dominant code is selected and transformed. The present invention is not limited to this, and may be performed by a two-stage deformation in which the image is deformed by the method a) and then deformed by the method b).

As described above, in the present embodiment, a chord progression composed of only a small number of basic codes is generated, and the basic code included in the generated chord progression is transformed into another code. The capacity of a database for generating a chord progression of codes can be significantly reduced (or the database itself can be omitted). Then, a new chord progression is generated simply by transforming a small number of basic chords contained in the chord progression into other chords. It can be easily generated. Also, when a method based on arithmetic is adopted as a method of generating a code progression consisting of only a small number of basic codes, the arithmetic algorithm is simple because only a small number of basic codes are generated, and therefore, the arithmetic algorithm is simplified. It is possible to reduce the CPU capacity used for calculation.

In the present embodiment, the main chords (I, IV, V7) are used as the basic chords. However, the present invention is not limited to this, and the main chords may be replaced with sub-chords (IIm, III).
m, VIm, and VII 7 (# 5)) to add 7 codes (all diatonic codes in the same key). Note that the main chord differs depending on whether the key of the music is a major key or a minor key, or depending on the tonality of the key, so that the basic chord may be different depending on the key of the music. Further, the present invention is not limited to chords generally called main chords and sub-chords, and a plurality of desired chords may be grouped and used as a basic chord. For example, a plurality of chords originally included in a certain song may be used as the basis, and the basic chords may differ depending on the song.

Further, in a certain music style, for example, a relatively simple song such as a song, a main chord is used as a basic chord, and a sub chord is added by transforming the main chord, and another music style, for example, a popular chord is used. For complex songs such as music, 1) use the main chord as the basic chord and transform it to suddenly generate a complex (more complex than sub-chord) chord progression, or 2) use the main chord as the basic chord. The main chords may be used, the next step adding subchords, and the next step generating a complex chord progression. The latter two-step transformation process in other music styles is disadvantageous when a complicated chord progression is suddenly generated from the main chord as in the former 1), that is, the main chord mixes with other complicated chords. The unnatural feeling due to the above can be eliminated.

Further, in the present embodiment, the two types of 2) a) and b) are adopted as the re-harmonizing method, but the present invention is not limited to this. Any method such as a method of changing the progress, a method of changing the basic chord progression to be a continuous dominant progression, and a method of changing the basic chord progression to become a sequential chord progression may be adopted. .

Further, in the present embodiment, only the number of basic codes to be transformed is considered as a problem, but the present invention is not limited to this, and the type may be considered as a problem. That is, the ratio of the type of the basic code to be transformed is set (for example, I: IV: V7 = 2: 3: 4), and the code to be replaced is determined by this ratio.

Furthermore, in the present embodiment, when presenting the transformed chord progression (step S7), only one is presented. However, the present invention is not limited to this, and a plurality of candidates may be presented. . Specifically, in the preceding chord progression transformation process (step S6), the transformation process is repeated a plurality of times based on the selected transformation method, or both transformation methods are selected without selecting the transformation method. By repeating the process a number of times, a plurality of transformation results are generated and presented.

The storage medium storing the program codes of the software for realizing the functions of the above-described embodiments is supplied to a system or an apparatus, and the computer (or CPU 5 or MPU) of the system or the apparatus stores the storage medium in the storage medium. Needless to say, the object of the present invention can be achieved by reading and executing the program code.

In this case, the program code itself read from the storage medium realizes the novel function of the present invention, and the storage medium storing the program code constitutes the present invention.

The storage medium for supplying the program code includes, for example, the floppy disk 20,
Hard disk, optical disk, magneto-optical disk, CD-
A ROM 21, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM 6, and the like can be used. Further, the program code may be supplied from the server computer 102 via another MIDI device 100 or the communication network 101.

Further, when the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS or the like running on the computer operates based on the instruction of the program code. It goes without saying that a case where a part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing is also included.

Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instruction of the program code, The CPU 5 provided in the function expansion board or function expansion unit performs part or all of the actual processing,
It goes without saying that a case where the functions of the above-described embodiment are realized by the processing is also included.

[0094]

As described above, claims 1 and 8
According to the invention described in the above, a code progression consisting of only a small number of basic codes is supplied, and at least a part of the supplied basic code is changed to a code other than the basic code, and the supplied code is provided. Since another chord progression is generated based on the progression, the capacity of a database for generating a chord progression composed of various types of codes can be significantly reduced. Then, a new chord progression is generated simply by changing a small number of basic chords included in the chord progression to chords other than the basic chord, so that the chord progression is composed of various types of chords and is musically meaningful. Things can be easily generated.

According to the second or ninth aspect of the present invention,
A code progression consisting of only a small number of basic codes is arithmetically generated based on a predetermined arithmetic algorithm, and at least a part of the basic code of the arithmetically generated code progresses is changed to a code other than the basic code. Since another chord progression is generated based on the chord progression, the capacity of a database for generating a chord progression composed of various types of codes can be significantly reduced. Then, since only a code progression consisting of a small number of basic codes is calculated and generated, the calculation algorithm is simple, and therefore, the ability to spend on calculation can be reduced.

According to the third aspect of the present invention, a code existing in a section excluding a predetermined section in a chord progression consisting of only the basic code is changed to a code other than the basic code, so that a predetermined section is changed. For example, if a section where the tune of the song changes when the basic chord is changed to a code other than the basic chord is set, the chord progression composed of various kinds of chords without changing the tune It can generate something meaningful.

According to the fourth aspect of the present invention, a predetermined percentage of the total number of codes included in the chord progression consisting of only the basic code is changed to a code other than the basic code. Other ratio codes remain as basic codes. Therefore, similar to the invention described in claim 3, a chord progression composed of various kinds of chords and having musically significant Can be generated.

According to the fifth aspect of the present invention, the basic code is changed to a code other than the basic code according to any one of a plurality of types of changing methods.
Other chord progressions that the user is most interested in can be generated.

According to the sixth or tenth aspect of the present invention, the type of connection between the sections of the song composed of a plurality of sections is
It is selected from a plurality of different connection types and determined, and based on the determined connection type, the code at the connection portion of each section is determined, and the code progression of the portion other than the code of the connection portion is performed. Since the chord progression is generated, a chord progression with good connection between the sections can be generated.

According to the seventh or eleventh aspect of the present invention, the type of connection between the sections of the music composed of a plurality of sections is
The code is selected and determined from a plurality of different connection types, and based on the determined connection type, the code at the connection portion of each section is selected from a small number of basic codes and determined. The code progression of the part other than the code of the part is generated using a small number of basic codes, and at least a part of the basic code of the code progression thus generated is changed to a code other than the basic code, and the generated code progression is generated. Since other chord progressions are generated based on the chord progressions that have been generated, it is possible to generate chord progressions with good connections between sections, and to have chord progressions composed of various types of chords, which are musically significant. Something can be created.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a chord progression generation device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a procedure of a main routine executed by the chord progression generation device of FIG. 1, in particular, a CPU;

FIG. 3 is a flowchart illustrating a detailed procedure of an automatic generation process 1 which is an example of an automatic generation process subroutine of FIG. 2;

FIG. 4 is a flowchart showing a detailed procedure of an automatic generation process 2 which is another example of the automatic generation process subroutine of FIG. 2;

FIG. 5 is a flowchart showing a detailed procedure of a subroutine code determination processing subroutine of FIG. 4;

FIG. 6 is a flowchart showing a detailed procedure of a chord progression transformation processing subroutine of FIG. 2;

[Explanation of symbols]

1 keyboard (supply means) 2 panel switch (supply means, selection means, connection type determination means) 5 CPU (operation generation means, other chord progression generation means, supply means, transformation means, selection means, connection type determination means, chord progression 6 ROM (supply unit) 7 RAM (supply unit) 10 FDD (supply unit) 11 HDD (supply unit) 12 CD-ROMD (supply unit) 14 Communication I / F (supply unit)

Claims (11)

[Claims] 1. A supply means for supplying a chord progression consisting of only a small number of basic codes, and said supplied chord progression is changed by changing at least a part of the basic chords to codes other than the basic chords. A chord progression generating device for generating another chord progression based on the chord progression. 2. An operation generating means for operationally generating a code progression consisting of only a small number of basic codes based on a predetermined operation algorithm, and converting at least a part of the operation-generated code progresses into basic codes other than the basic code. By changing to code,
A chord progression generating device for generating another chord progression based on the chord progression generated by the operation. 3. The code other than the basic code, wherein the other code progress generating means changes a code existing in a section other than a predetermined section of the code progression including only the basic code. Item 3. The chord progression generation device according to any one of Items 1 and 2. 4. The apparatus according to claim 1, wherein the other chord progression generation means changes a code of a predetermined ratio of the total number of chords included in the chord progression consisting of only the basic chord to a code other than the basic chord. The chord progression generation device according to any one of 1 and 2. 5. A method for changing the basic code to a code other than the basic code, comprising a plurality of types of changing methods, a selecting means for selecting one of the plurality of types of changing methods, and the other code progress generating means. 5. The chord progression generating device according to claim 1, wherein the basic code is changed to a code other than the basic code according to the selected change method. 6. A combination type determining means for selecting and determining a connection type between each section of a song composed of a plurality of sections from among a plurality of different connection types, based on the determined connection type. A code comprising: code determining means for determining a code in a connecting portion of each section; and code progress generating means for generating a code progression of a portion other than the code of the determined connecting portion in each section. Progress generator. 7. A combination type determining means for selecting and determining a connection type between each section of a song composed of a plurality of sections from among a plurality of different connection types, based on the determined connection type, Code determining means for selecting and determining a code in the connection portion of each section from a small number of basic codes, and a code progression of a portion other than the code of the determined connection portion in each section by a small number of basic codes. Using the chord progression generating means to generate the chord progression and changing at least a part of the basic chord of the generated chord progression to a code other than the basic chord to generate another chord progression based on the generated chord progression A chord progression generation device, comprising: another chord progression generation means. 8. A supply module for providing a chord progression consisting of only a small number of basic chords, wherein the supplied chord progression is changed by changing at least a part of the basic chords to codes other than the basic chords. A storage medium storing a computer-implementable program including a code generation module for generating another code progression based on the code progression. 9. An operation generation module for operationally generating a code progression consisting of only a small number of basic codes based on a predetermined operation algorithm, and converting at least a part of the operation-generated code progressions to basic codes other than the basic code. By changing to code,
A storage medium storing a computer-implementable program, the program including a code progression generation module configured to generate another code progression based on the calculated and generated code progression. 10. A connection type determination module for selecting and determining a connection type between each section of a song composed of a plurality of sections from a plurality of different connection types, based on the determined connection type. A computer-implementable program including: a code determination module that determines a code in a connection portion of each section; and a code progress generation module that generates a code progression of a portion other than the code of the determined connection portion in each section. Storage medium storing. 11. A connection type determination module for selecting and determining a connection type between each section of a song composed of a plurality of sections from a plurality of different connection types, based on the determined connection type. A code determination module for selecting and determining a code in the connection portion of each section from a small number of basic codes, and a code progression of a portion other than the code of the determined connection portion in each section by a small number of basic codes. Using the chord progression generation module to be used and changing at least a part of the basic chord of the generated chord progression to a code other than the basic chord, generating another chord progression based on the generated chord progression A storage medium storing a computer-implementable program including an other code progress generation module.