JP2002258846A - Device and program for automatic music arrangement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic music arranging device which automatically arranges music in a form which is easy to play, while avoiding unnaturalness in music. SOLUTION: An accompaniment sound determining means 20 sends data, indicating the chord represented by chord progression data 211 to a chord sound selecting means 20. The selecting means 202 refers to a chord tone database 204 with stored data showing the relation of intervals of constitution sounds by chord kinds and selects combinations of pitches of the constitution sounds of the chord represented by the data. An evaluation means 203 evaluates the combinations. An accompaniment sound determining means 201 selects one of the combinations of the pitches selected by the selecting means 202 in accordance with the evaluation. Thus, the combinations of the pitches of the constitution sounds constituting the chord are selected by chords, represented by the chord progression data to generate accompaniment playing data 212.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for automatically arranging chord progression information for changing chord progression information on chord progression information indicating the content of chord progression.

[0002]

2. Description of the Related Art At present, automatic arranging devices have been commercialized to provide a wider range of ways to enjoy music. The arranging device automatically changes the content of the performance represented in advance in the form of data. When mounted on a musical sound generator such as an electronic musical instrument, it is used for automatic performance (including automatic accompaniment here), navigation for guiding a performance operator to be operated by a user, and the like.

[0003]

In a conventional automatic arrangement device, data representing the contents of a basic performance (including accompaniment) is used in accordance with a pitch or code specified by a user. Arrangement was performed by converting the pitch of the musical tone represented. For this reason, depending on the combination of the data targeted for the arrangement, the contents specified by the user, and the pitch conversion method, the contents of the performance after the arrangement become unnatural or difficult to perform. There is a problem that results are obtained.

[0004] It is an object of the present invention to provide an automatic arranging apparatus for automatically arranging music in a form easy to play while avoiding musical unnaturalness.

[0005]

According to a first aspect of the present invention, there is provided an automatic arrangement apparatus for automatically adjusting a chord progression for chord progression information representing chord progression contents. It is assumed that, for each chord represented by the chord progression information obtained by the chord progression information, a plurality of combinations of pitches of constituent tones constituting the chord are assumed. Means, evaluation means for performing a predetermined evaluation for each pitch combination assumed by the assumption means, and selection means for selecting one of the pitch combinations assumed by the assumption means according to the evaluation result of the evaluation means. And

It is preferable that the combination of pitches assumed by the assumption means is a combination of pitches of a chord represented by chord progression information and a combination of pitches obtained by turning the combination. In addition, the evaluation means determines the distance from the pitch combination selected for the immediately preceding chord by the selection means or the distance from a predetermined pitch for each combination of pitches assumed by the assumption means. To evaluate the
It is desirable.

The evaluation means removes or considers a combination satisfying a predetermined condition for a pitch between the pitches from among combinations of pitches assumed by the assumption means,
It is desirable that the selecting means select the pitch combination. Preferably, the condition includes at least one of a semitone interval and a perfect fifth interval present with the combination of intervals selected by the selection means for the immediately preceding chord. The assuming means refers to data indicating the pitch relationship between the constituent sounds constituting the chord for each type of the chord in accordance with the abbreviation of the chord specified in advance, thereby obtaining the pitch corresponding to the abbreviation. Assuming a combination of
It is desirable.

The automatic arrangement apparatus according to a second aspect of the present invention further comprises, in addition to the configuration of the first aspect, a sound range designation means for allowing a user to designate a pitch range to be combined with the assumption means. The assuming means assumes a combination of pitches within the specified range when the range is specified by the range specifying means.

The program of the present invention is intended to execute chord progression information representing the content of chord progression on an apparatus for automatically performing arrangements for changing the content of chord progression, and acquire chord progression information. Function, a function for assuming a plurality of combinations of pitches of constituent sounds constituting the chord for each chord represented by the chord progression information acquired by the acquiring function, and a pitch assumed by the assuming function. For each of the combinations, the function of performing a predetermined evaluation and the function of selecting one of the pitch combinations assumed by the assumed function according to the evaluation result of the evaluated function are realized.

In the present invention, for each chord represented by chord progression information, a plurality of combinations of pitches of constituent sounds constituting the chord are assumed, and the assumed combination of pitches is evaluated. , One of the assumed combinations of pitches is selected. In this way, by selecting the most appropriate combination from a plurality of assumed combinations of pitches, the arrangement is automatically performed in a musically natural and easy-to-play form.

If the user is allowed to specify the range of pitches to be combined, the music composition reflects the wishes of the user. As a result, it is possible to automatically arrange the music in a form that makes it easier to perform.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit configuration diagram of the automatic music arrangement device according to the present embodiment. FIG.
As shown in FIG. 1, the automatic arrangement device includes a CPU 101 that controls the entire device, and a ROM 1 that stores programs executed by the CPU 101 and various control data.
02 and RAM used by the CPU 101 for work
103 and an input device 104 for inputting various data
And the monitor 105 for the user to check the arrangement result
And a bus 106 for interconnecting them. Thereby, the automatic arrangement device inputs data representing the performance contents from the input device 104, arranges the data, and displays the data obtained by the arrangement on the monitor 10.
5 is realized. The data is assumed to be chord progression data representing chord progression.

The input device 104 includes a keyboard, a floppy (registered trademark) disk device, and a CD-ROM.
A device or an interface for communicating with an external device corresponds to the device. As the monitor 105, a display device,
Alternatively, a sound source device and the like correspond. It may be a floppy disk device, a CD-ROM device, or an interface for communicating with an external device. Needless to say, a plurality of devices may correspond to the input device 104 and the monitor 105, respectively, or they may be the same.

FIG. 2 is a diagram for explaining the functional configuration of the automatic arrangement device having the above-mentioned circuit configuration. This FIG. 2 and further FIG.
The functions installed in the automatic arrangement device will be described with reference to the explanatory diagram shown in FIG. The chord progression data 211 in FIG. 2 is input by the input device 104 in FIG. In the present embodiment, as shown in FIG. 4A, the chord progression data 211 input from the input device 104 is treated as a two-dimensional array variable cp. In the array variable cp, the first parenthesis (the parenthesis having “i” in FIG. 4A) is a code appearing on the chord progression (“0 to n-th code” in FIG. 4A). The second parenthesis (the parenthesis having “j” in FIG. 4A) specifies the type of data representing the content of the code. The type of the data is data represented by symbols “ROOT”, “TYPE”, and “LEN”. "ROOT" is data indicating the pitch of the root (root note) (hereinafter referred to as root data), "TYPE" is data indicating the type of chord (hereinafter referred to as type data), and "LEN" is the chord sounding. Data indicating the duration (sounding duration). Hereinafter, such data will be collectively referred to as code data.

[0015] The accompaniment sound determining means 201 includes an array variable cp.
For each chord specified by the argument in the first parenthesis of (chord progression data 201), a process for determining a combination of pitches of constituent sounds to be emitted as the chord is performed. The processing is performed as follows.

From the array variable cp, the accompaniment sound determination means 201 determines the chord data to be processed (the respective data represented by the symbols "ROOT", "TYPE" and "LEN" in FIG. 4A). And sends it to the chord tone selection means 202. Upon receiving the data from the accompaniment sound determining means 201, the selecting means 202 receives a chord tone database (hereinafter abbreviated as a chord tone DB) 204.
, A plurality of candidates for the combination as pitches of the constituent sounds of the chord represented by the data are selected. The selected combination of pitches is sent to the accompaniment sound determination means 201.

The chord tone DB 204 stores, for each chord type, data representing the pitch relationship of the constituent sounds. In the present embodiment, as shown in FIG. 3, it is handled as an array variable chtone. By setting the dimension to two dimensions, there are three types of abbreviations: no omission (basic form), five omissions (omission of fifth constituent sound from the root), and omission of root (omission of root as constituent sound) Another,
The chord type holds data representing the relationship between the pitches of the constituent sounds. The first parenthesis is for specifying an abbreviation, and the second parenthesis is for specifying a code type. In FIG. 3, "maj" is a major,
“Min” is minor, “7th” is seventh, “m”
“7” represents a minor seventh, and “1” in a 12-digit number represented by “0” and “1” indicates the pitch of a constituent sound when the root is assumed to be “C”. The number is set to 12 digits because one octave is 12 semitones, and the pitch is indicated by the digit "1".

The chord sound selecting means 202 refers to the chord tone DB (array variable chtone) 204 as described above as a combination of constituent sounds, and the constituent sound represented by the chord data received from the accompaniment sound determining means 201. In addition to the pitch combination of, the combination obtained by turning the pitch is selected as a candidate. If such a combination is selected as a candidate, at least the sound of the original code can be maintained. Therefore, it is possible to prevent the original performance represented by the chord progression data (array variable cp) 211 from being arranged in a musically unnatural form.

As shown in FIG. 3, the array variable chtone holds data other than the basic form (no omission) as data indicating the pitch relation of the constituent sounds of the chord. Thereby, a wider range of arrangements can be performed according to the user's request.

The accompaniment sound determining means 201, which has received the pitch combination, sends it to the evaluation means 203, and the evaluation is performed for each combination. According to the evaluation result of the evaluation means 203, one of the pitch combinations selected as candidates by the chord sound selection means 202 is selected. The accompaniment performance data 212 is data generated by the accompaniment sound determination unit 201 selecting a combination of pitches as described above.

The evaluation means 203 basically evaluates a pitch combination by obtaining a distance from the pitch combination in the immediately preceding chord. In other words, it is performed by calculating the moving distance of the finger as the chord progresses. By performing such exclusion or evaluation, the accompaniment sound determination unit 201 is caused to select a combination of pitches that can be performed more easily when the user performs the performance of the arranged performance.

By the way, it is usually difficult to perform a performance operation for causing a musical instrument to produce two sounds having a pitch of one semitone. For example, on a keyboard, two adjacent fingers must press an adjacent white key and black key. For this reason, combinations of pitches that satisfy the condition are excluded from the options. It is known that parallel (continuous) 5 degrees, in which adjacent chords advance at a perfect 5 degrees, have forced stability in which the lower voice should sound as the tonic or tonic of the key. Combinations of constituent sounds that satisfy such conditions are reflected in the evaluation. Thereby, it is possible to further avoid the occurrence of musical inconvenience.

The chord tone DB (array variable chot)
One) 204 is stored in the ROM 102 of FIG. Code progress data (array variable cp) 211 is RAM
The accompaniment sound performance data is stored in the RAM 103.
And output to the monitor 105 or output to the outside via an output device (not shown).
The output device is, for example, a floppy disk device, C
It is a D-ROM device or an interface for communicating with an external device. The accompaniment sound determination means 201, the chord sound selection means 202, and the evaluation means 203 are all shown in FIG.
The CPU 101 executes the program stored in the ROM 102 while using the RAM 103 for work.

Next, the operation of the CPU 101 will be described in detail with reference to various flowcharts shown in FIGS. FIG. 5 is a flowchart of the entire process. It shows the overall flow of processing executed by the CPU 101 after the power is turned on. For the sake of convenience, it is assumed here that the input device 104 is a device such as a keyboard for inputting data by a user's operation. First, the overall process will be described in detail with reference to FIG. Note that the entire processing is performed by the CPU 101
This is realized by executing the program read from the ROM 102 while using the 03 for work.

First, in step 501, an initialization process is performed. After the apparatus is set to a predetermined state by executing the processing, the process proceeds to step 502 and the input apparatus 1
04 is scanned. After that, it moves to step 503. Although a detailed description is omitted in the present embodiment, a user sets a mode and causes the apparatus to perform a desired operation. The operation is performed in step 503.
This is realized by executing the following processing.

First, in step 503, it is determined whether or not the input for the chord progression data 211 has been performed. With the user setting the input mode, the input device 10
In the case where the user has operated No. 4, the determination is YES and the process proceeds to step 504. After inputting the chord progression data 211 in accordance with the operation, the process returns to step 502. Otherwise, the determination is no and the process moves to step 505. By executing the processing of step 504, the array variable cp as shown in FIG.
Is stored in the RAM 103 in the form of.

At step 505, it is determined whether or not the setting for the arrangement has been performed. If the user operates the input device 104 in a state in which the setting mode is set by the user, the determination is YES and the process proceeds to step 506, where the optional variables shown in FIG. After the setting is made by substituting a value into any of the above, the process returns to step 502. Otherwise, the determination is no and the process moves to step 507.

In FIG. 4B, the variable Low
rLimit and UpperLimit are used to specify the range of the constituent sounds of the chord, and the variable Omi
t is used to select a code abbreviation (see FIG. 3). The variable HomePit is the central pitch to be considered when selecting combinations of pitches (center position)
It is for specifying. Variables A, B, and C are
Each is a variable that holds a weight used when evaluating a combination of pitches. A weight indicating the degree of considering the moving distance for the combination of pitches is assigned to the variable A, and similarly, a weight indicating the degree of considering the center position and the variable C are each considered to the variable C is assigned to the variable B. Is assigned.

In step 507, it is determined whether or not an instruction for arrangement has been given. If the user operates the input device 104 to give an instruction to arrange music, the determination is YES, and at Step 506, the arrangement processing is performed with the arrangement variable cp as the object of arrangement, and the process returns to Step 502. Otherwise, the determination is no and the process moves to step 509.

At step 509, it is determined whether or not an instruction to output the accompaniment sound performance data 212 generated by the arrangement to the monitor 105 has been given. If the user gives the instruction by operating the input device 104, the determination is Y
When the status becomes ES, the process proceeds to step 510, where the monitor 105
, The performance data 212 is output in the form of an image or a sound (automatic performance).
Return to Otherwise, the determination is no and that step 50 is executed without executing the processing of the other steps.
Return to 2.

In the overall processing, the above-described processing is executed according to the above-described flow. Thus, the automatic arrangement device operates according to the operation of the input device 104 by the user. FIG. 6 is a flowchart of the music arrangement process executed as step 508. Next, FIG.
, The arrangement process will be described in detail.

In executing the editing process, variables as shown in FIG. 4C are used. In FIG. 4 (c), the array variable v1 is for holding the pitch (value indicating) of the constituent sounds combined for the chord currently being processed, and the array variable v2 is This is for holding the pitch of the constituent sound selected as the combination for the (previous) chord. The array variable vbest is for storing a selected combination of pitches as data, and corresponds to the accompaniment sound performance data 212 in FIG. The variable Rotaten is prepared for counting the number of code changes. Hereafter, the pitch (value indicating)
Is also called a pitch set.

First, in step 601, the array variable cp
Is assigned to the variable cptr for managing the code to be processed among the codes in which the code data is held, and the value 0 representing the code located at the top of the variable cptr. In the following step 602, it is determined whether or not the data of the code specified by the value of the variable cptr is held in the array variable cp. If the data is not stored in the array variable cp, that is, if the arrangement has ended, the determination is Y
It becomes ES, and a series of processing ends here. Otherwise, the determination is no and the process moves to step 603.

In step 603, 30000 defined as a default value is substituted for a variable vmin prepared for holding the evaluation value of the pitch set. In the next step 604 to be executed, 0 is substituted for the variable Rotaten. Thereafter, the process proceeds to step 605. The smaller the evaluation value, the higher the evaluation.

At step 605, the variable Rotaten
Is determined to be greater than or equal to a predetermined upper limit value of the number of turns.
If the value is equal to or greater than the upper limit of the number of turns, the determination is YE
In S, the flow shifts to step 616. Otherwise, the determination is no and the process moves to step 606, where the array variable v1 is initialized, where -1 is substituted for each element here, and then the process moves to step 607.

At step 607, it is determined whether or not the value of the variable cptr is 0. If the code located at the beginning on the chord progression represented by the chord progression data 211 held in the array variable cp is to be processed, the determination is YES,
At step 608, the array variable v2 is similarly initialized, and at step 609, a chord tone selection process for substituting the pitch (value indicating) of the constituent sound for each element of the array variable v1 is performed, and then the process proceeds to step 609. . If not,
The determination is NO, and the chord tone selection process of step 609 is executed.

At step 610, it is determined whether a combination of pitches (pitch set) has been selected as a result of executing the chord tone selection process. In the chord tone selection process,
If an appropriate combination of pitches (pitch set) cannot be selected, 0 is substituted for a variable ok which is also an argument, and 1 is substituted if it can be selected. The value indicating the pitch constituting the selected pitch set is assigned to each element of the array variable v1. From this, if the value of the variable ok is 1, the determination is YES and step 611 is executed.
After performing the evaluation process for evaluating the selected pitch set, the process proceeds to step 612. Otherwise, the determination is no and step 61 described below
Move to 5.

In the evaluation processing, the calculated evaluation value is substituted for a variable v which is also an argument. In step 612, it is determined whether the value of the variable v is smaller than the value of the variable vmin. This time, if the selected pitch set has the highest evaluation so far, the determination is YES
And the process proceeds to step 613. Otherwise, the determination is no and the process moves to step 615.

In step 613, the value of the variable v is substituted for the variable vmin. In the following step 614, the value of each element of the array variable v1 is packed and assigned to the element specified by the value of the variable cptr of the array variable vbest. In the next step 615 to be executed, the value of the variable Rotaten is incremented. After performing the increment, the process returns to step 605, and the subsequent processes are similarly executed. As a result, while incrementing the number of turns by one, at any time, selecting the pitch set by replacing the pitch set with the highest evaluation with the previous one,
It is designed to save.

On the other hand, when the determination in step 605 is YES, that is, when the selection of the pitch set of the chord to be processed is completed, step 616 is executed. The value (data) indicating the content of the pitch pack, which has been assigned as a value, is depacked and assigned to each element of the array variable v2. As a result, this time,
When the data representing the selected pitch set (a set of values indicating the pitches of the constituent sounds) is stored, the process proceeds to step 617, where the value of the variable cptr is incremented. Thereafter, the process returns to the step 602, and the processing target is changed to the next code, and the subsequent processing is executed in the same manner. Thus, the pitch set is selected while sequentially moving the code to be processed from the code located at the head on the chord progression represented by the chord progression data 211 to the rear thereof.

Here, the subroutine processing executed in the chord tone selection processing will be described in detail with reference to various flowcharts shown in FIGS. FIG. 7 is a flowchart of the chord tone selection processing executed as step 609 in the chord tone processing. First, the selection process will be described in detail with reference to FIG.

In the selection process, as described above, the pitch set of the chord is selected, and the values indicating the pitches constituting the set are assigned to the elements of the array variable v1. If the pitch set is not appropriate, 0 is substituted for the variable ok. First, in step 701,
A chord component sound count process for specifying the number of chord components specified by the value of the variable cptr is executed. After that,
In step 702, the value of the variable LowerLimit is set in the variable p, in step 703, 0 is set in the variable cnt, and in step 704.
After substituting 1 for the variable ok in step 705,
Move to The variable p is a variable prepared for specifying the pitch of the pitch set, and the variable cnt is a variable prepared for counting the number of constituent sounds (pitch). The number of constituent sounds which is the execution result of the number of chord constituent sounds processing is a variable ct which is also an argument.
n.

In step 705 and subsequent steps, each element of the array variable v1 is obtained by performing the number of turns specified by the value of the variable Rotaten on the pitch of the constituent sound of the chord specified by the value of the variable cptr. A process for substituting values indicating the pitches of the pitch set and rewriting the value of the variable ok to 0 is performed if the pitch set is not appropriate.
The processing for this is performed while sequentially incrementing the values of the variables p and cnt.

First, at step 705, the array variable v1
It is determined whether or not the assignment of the value indicating the pitch of the pitch set to each element has been completed. The pitch is determined in order from the lowest. The number of constituent sounds is substituted for a variable ctn, and the number of turns is substituted for a variable Rotaten. From this, the value obtained by subtracting the value of the variable Rotaten from the value of the variable cnt (= cnt−Roten) is the variable ctn.
Is greater than or equal to, the determination is YES and the process moves to step 714. Otherwise, the determination is no and the process moves to step 706.

In step 706, the value of the variable p is
It is determined whether the value is larger than the value of upperLimit. The value of the variable p is sequentially incremented in order to select (specify) the pitch of the pitch set. From this,
The value of the variable LowerLimit and the variable UpperLim
If all the pitches of the pitch set cannot be selected (specified) within the range specified by the value of it, the determination is YES, and in step 707, 0 is substituted for a variable ok, and a series of processing ends. Otherwise, the determination is no and the process moves to step 708, where code tone processing is performed to determine whether or not the pitch indicated by the value of the variable p corresponds to the pitch of the pitch set. Move to

As described above, in this embodiment, the pitch of the pitch set is selected within the range specified by the user. As a result, the user's request for the tone range is reflected in the selection of the pitch of the pitch set, and the arrangement can be performed in a more desirable form for the user.

In the above code tone processing, 1 is substituted into the variable ctone, which is also an argument, if the pitch indicated by the value of the variable p corresponds to the pitch of the pitch set, and 0 otherwise. I have. In step 709, it is determined whether or not the value of the variable ctone is 1. The variable cton
If 1 has been substituted for e, the determination is YES and the process moves to step 710. Otherwise, the determination is no and the process moves to step 713 described below.

At step 710, it is determined whether or not the value of the variable cnt is equal to or greater than the value of the variable Rotaten. The variable c
The value of nt is not incremented unless the determination in step 709 is YES. Therefore, if the determination in step 709 is YES for the number specified by the value of the variable Rotaten, the determination is YES and the process proceeds to step 711. Otherwise, the determination is no and the process moves to step 712.

In step 711, a value obtained by subtracting the value of the variable Rotaten from the value of the variable cnt (= cnt-rot
aten), the element of the array variable v1
Substitute the value of In the following step 712, the value of the variable cnt is incremented. Thereafter, the process proceeds to step 713, where the value of the variable p is incremented, and the process returns to step 705. Thereby, a value indicating a pitch which sequentially constitutes the pitch set is assigned to each element of the array variable v1 one by one.

At step 714, to which the operation proceeds when the determination at step 705 is YES, the variable m is set to the element v1 of the array variable v1 if the chord to be processed is a triad.
The absolute value of the value obtained by subtracting the value of the element v1 [2] from the value of [3] is substituted. Element v1 if the chord is a 4 chord
The absolute value of the value obtained by subtracting the value of the element v1 [3] from the value of [4] is substituted. In a succeeding step 715, it is determined whether or not the value of the variable m is 1. If the pitch between the pitches selected as the pitch set is one semitone, the determination is YES, and in step 716, 0 is substituted for a variable ok, and a series of processing ends. Otherwise, the determination is no, and a series of processing ends here.

In the arrangement process shown in FIG. 6, if the value of the variable ok is 0, the next pitch set is selected without evaluating the selected pitch set. In this way, pitch sets in which the pitch between pitches is one semitone are ignored.

Next, the processing of the number of notes constituting the chord executed as step 701 will be described in detail with reference to the flowchart shown in FIG. In the constituent sound number processing, referring to the array variable chtone shown in FIG.
It counts the number of notes that make up the chord.

First, at step 801, 0 is substituted for a variable i. In the following step 802, 0 is substituted for the variable ctn. Step 803 to which the process proceeds after the substitution
Then, it is determined whether the value of the variable i is 12 or more. The element of the array variable "chtone" holds data of which the number of effective bits (digits) is 12 bits. The variable i is used to manage a bit of interest in the 12-bit data. From this, when the counting of the number of constituent sounds of the chord is completed, the determination is YES, and a series of processing is ended here. Otherwise, the determination is no and the process moves to step 804.

At step 804, "00000000
0001 "is shifted to the left by the value of the variable i, and the result obtained is substituted for the variable a. In the next executed step 805, the value of the variable Omit and the element of the array variable cp are Variable cptr held
The type data of the code specified by the value of “(c
The value of the element of the array variable chtone designated by “p [cptr] [type]”) is substituted for the variable b. After that, the process moves to step 806.

At step 806, the value of the variable a and the variable b
Is ANDed in bit units, and it is determined whether the logical sum of the AND is 1 or not. Value of variable b (in binary notation)
If “1” exists at the position where “0000000000001” has been shifted to the left by the value of the variable i, the determination is YES, the value of the variable ctn is incremented in step 807, and the value of the variable i is further increased in step 808. After the value is incremented, the process returns to step 803. Otherwise, the determination is no and step 808 is reached.
Move to

As described above, in the processing of the number of notes constituting the chord, the number of “1” s existing in the data held in the elements of the array variable “tone” is counted, and the variable c
The number of notes constituting the chord specified by the value of ptr and the value of the variable Omit is specified.

FIG. 9 is a flowchart of the chord tone processing executed as step 708 in the chord tone selection processing shown in FIG. Next, the code tone processing will be described in detail with reference to FIG. In the code tone process, as described above, it is determined whether or not the pitch indicated by the value of the variable p corresponds to the pitch of the pitch set, and the value indicating the determination result is substituted for the variable ctone which is also an argument. Processing.

First, in step 901, the variable p is
Of the code specified by the value of the variable cptr held in the element of the array variable cp from the value obtained by adding the value of “cp [cptr] [ROO
T]]), and the result of the subtraction is substituted for a variable a. In the next step 902 to be executed, the variable b
To the remainder of the value of the variable a divided by 12. Thereafter, the process proceeds to step 903. The reason why 12 is added to the value of the variable p in step 901 is to prevent the value of the variable a from becoming negative. The value of variable a is set to 1 for variable b.
Substituting the remainder divided by 2 is the array variable choton
This is because, as shown in FIG. 3, data representing the pitch relationship between the constituent sounds constituting the chord within 12 semitones is stored in e.

In step 903, “00000000
0001 "is shifted to the left by the value of the variable b, and the result is substituted for the variable c. In the next step 904, the value of the variable Omit and the element of the array variable cp are stored. Type data of the code specified by the value of the variable cptr (“cp [cp
tr [[type]]) is assigned to the variable d. Thereafter, the process proceeds to step 905.

In step 905, the value of the variable c and the variable d
Is ANDed in bit units, and it is determined whether the logical sum of the AND is 1 or not. Value of variable d (in binary notation)
If “1” exists at the position where “0000000000001” is shifted to the left by the value of the variable b, the determination is YES, and the pitch indicated by the value of the variable p corresponds to the pitch of the pitch set. In step 906, the variable ct
After substituting 1 for one, a series of processing ends. Otherwise, the determination is no, and in step 907, 0 is substituted for the variable ctone, and the series of processing ends.

For example, if a value indicating no omission (see FIG. 3) is assigned to the variable Omit, the variable cto
ne is 1 when a value indicating the pitch of the constituent sound of the chord specified by the value of the variable cptr is substituted for the variable p.
Is substituted. Thus, in the chord tone selection process of FIG. 7, if the value of the variable Rotaten is 0, the pitch of the component sound of the chord is selected as it is as the pitch of the pitch set. However, for example, the variable Rotaten
Becomes 1, the chord root is ignored, and when a value indicating a higher pitch by one octave from the pitch of the root is substituted for the variable p, the pitch indicated by the value is pitched. It will be selected as the pitch of the set. In this way, a combination of pitches obtained by performing the number of turns specified by the value of the variable Rotaten with respect to the code specified by the value of the variable cptr is selected as a pitch set.

Returning to the description of the subroutine processing executed in the music arrangement processing of FIG. FIG. 10 is a flowchart of the evaluation processing executed as step 611 in the arrangement processing. Next, the evaluation processing will be described in detail with reference to FIG. The evaluation process is a process of evaluating the pitch set selected by executing the above-mentioned chord tone selection process.

First, in step 1001, a moving distance evaluation process for evaluating the pitch set selected this time is executed by paying attention to the moving distance from the pitch set selected for the immediately preceding chord. In the following step 1002, a center position evaluation process for evaluating the currently selected pitch set is executed by paying attention to the center position (the value of the variable HomePit) specified by the user. Then step 10
Shift to 03.

The evaluation values, which are the execution results of each of the above evaluation processes, are substituted into variables d1 and d2, respectively. In step 1003, a final evaluation value is calculated using the values of the variables d1 and d2, and the calculated evaluation value is substituted for the variable v. Thereafter, a series of processing ends.

In this embodiment, the value of the variable d1 is
Is added to the value obtained by multiplying the value of the variable d2 by the value of the variable B, and the added value is substituted for the variable v. In this way, by using the values of the variables A and B for which the user can set the value for calculating the value to be substituted into the variable v, the points that the user considers important are reflected in the evaluation value (the value of the variable v). ing.

Hereinafter, the subroutine processing executed in the above-described evaluation processing will be described in detail with reference to FIG. 11 and FIG. FIG. 11 is a flowchart of the moving distance evaluation process executed as step 1001. First, the moving distance evaluation processing will be described in detail with reference to FIG.

First, in step 1101, 0 is substituted for a variable i. In the following step 1102, 0 is substituted for the variable d1. Thereafter, the process proceeds to step 1103. In the present embodiment, the movement distance (the distance between two pitch sets) is calculated as an accumulated value of the pitch between corresponding pitches. The variable i is a variable prepared for managing the pitch of interest in the pitch set. In steps 1103 to 1106, processing for calculating the accumulated value of the pitch is performed while incrementing the value of the variable i.

First, at step 1103, it is determined whether or not the calculation of the accumulated value has been completed. For example, when the value assumed as the upper limit of the number of constituent sounds of the chord is substituted for the variable i, the determination is YES and the process proceeds to step 1107. Otherwise, the determination is no and the process moves to step 1104.

In step 1104, the element v1 [i] of the array variable v1 specified by the value of the variable i and the array variable v
It is determined whether each value of the element v2 [i] of No. 2 is 0 or more. If the number of notes constituting any of the pitch set determined for the immediately preceding chord and the pitch set selected this time is smaller than a value obtained by subtracting 1 from the value of the variable i, the determination is NO and step 1106 is performed. Move to Otherwise, the determination is yes and the process moves to step 1105.

In step 1105, the absolute value of the value obtained by subtracting the value of the element v2 [i] of the array variable v2 from the value of the element v1 [i] of the array variable v1 is added to the value of the variable d1, and the added value is calculated. Substitute into the variable d1. In the following step 1106, the value of the variable i is incremented. After the increment, the process returns to step 1103.

As described above, in the present embodiment, the pitches constituting the pitch set determined for the immediately preceding chord,
This time, the pitches constituting the selected pitch set are associated with each other, and the absolute value of the pitch is accumulated. In other words, the evaluation focuses on the movement distance of the entire finger to sound the next chord. Thereby, even if the movement amount of the hand is relatively small, the pitch set in which each finger must be moved relatively large is evaluated as low.
Of course, it is also possible to calculate the moving distance between the pitch sets by focusing on the center of the pitch of the pitch set.

After step 1107, in which the determination in step 1103 is YES and the process proceeds, attention is paid to whether or not the current pitch set satisfies the condition of 5 degrees of parallelism, and the value of the variable d1 is updated. Is performed. First, in step 1107, the value of the element v1 [2] of the array variable v1 is changed to the element v1 of the array variable v1.
Substitute the absolute value of the value obtained by subtracting the value of [0]. In the following step 1108, the variable b is set to the element v2 of the array variable v2.
The absolute value of the value obtained by subtracting the value of the element v2 [0] of the array variable v2 from the value of [2] is substituted. In the next step 1109 to be executed, the variable c is set to the element v1 of the array variable v1.
The value obtained by subtracting the value of the element v2 [0] of the array variable v2 from the value of [0] is substituted. After the substitution, the process moves to step 1110.

In step 1110, it is determined whether the values of the variables a and b are both 7 and the value of the variable c is not 0.
If the pitches of the roots are different from each other in the array variables v1 and v2, and a pitch set in which a perfect fifth pitch exists between the pitches is held, the determination is YES and step 1111 is performed. Then, after updating the value of the variable d1 to a value obtained by adding the value of the variable C (see FIG. 4B) to the previous value, a series of processes is ended. Otherwise, the determination is no, and the series of processing ends without updating the value of the variable d1.

In the present embodiment, as described above, even if the chord progresses while the current pitch set is at a perfect fifth, the value of the variable d1 is not updated if the pitches of the roots match. Like that. Thus, it is possible to prevent a situation in which chords of the same pitch set are continuous, and to prevent a musical defect from occurring. By using the value of the variable C to update the value of the change d1, the user can specify the degree of prohibition of the parallelism of 5 degrees. These operations may be performed under other conditions such as parallelism of 8 degrees.

FIG. 12 is a flowchart of the center position evaluation processing executed as step 1002 in the evaluation processing shown in FIG. Next, the center position evaluation processing will be described in detail with reference to FIG. This evaluation processing is performed based on the center position (variable H) specified by the user.
The value of the pitch set selected this time is evaluated by paying attention to the movement distance from the value of “homePit”.

First, at step 1201, 0 is substituted for a variable i. In the following step 1202, 0 is substituted for the variable d1. After that, it moves to step 1203. In the present embodiment, the movement distance (the distance between the current pitch set and the center position) is calculated as the cumulative value of the pitch between the pitch forming the pitch set and the center position (pitch specified by the user). It has become. The variable i is a variable prepared for managing the pitch of interest in the pitch set. In steps 1203 to 1206, processing for calculating the accumulated value of the pitch is performed while incrementing the value of the variable i.

First, at step 1203, it is determined whether or not the calculation of the accumulated value has been completed. For example, if the value assumed to be the upper limit of the number of constituent sounds of the chord is substituted for the variable i, the determination is YES, and the series of processing ends here. Otherwise, the determination is no and the process moves to step 1204.

At step 1204, it is determined whether or not the value of the element v1 [i] of the array variable v1 specified by the value of the variable i is 0 or more. In this case, when the number of constituent sounds of the selected pitch set is smaller than the value obtained by subtracting 1 from the value of the variable i, −1 is substituted for the element v1 [i], so the determination is NO. Then, the process proceeds to step 1206. Otherwise, the determination is yes and the process moves to step 1205.

In step 1205, the absolute value of the value obtained by subtracting the value of the variable HomePit from the value of the element v1 [i] of the array variable v1 is added to the value of the variable d1, and the added value is substituted for the variable d1. In the following step 1206, the variable i
Increment the value of. After performing the increment, the process returns to step 1203.

As described above, in the present embodiment, the pitch and the variable Hom constituting the pitch set selected this time are set.
By accumulating the absolute value of the pitch at the center position indicated by the value of ePit, the movement distance between them is calculated as the evaluation value. However, the calculation may be performed by another method such as obtaining a pitch of a central pitch in the center position and the pitch set.

In the present embodiment, the user specifies the range, which is the range in which the pitches constituting the pitch set are selected, on an absolute basis, but the range is selected, for example, for the immediately preceding chord. The pitch may be a relative value based on the pitch at the center of the pitch set. They may be specified together. They may be used not to limit the range in which the pitch can be selected, but to reflect whether or not the range is in the evaluation. As is apparent from these, the present invention can be variously modified. A simple accompaniment line may be generated by associating each chord on the chord progression with a sound on the rhythm pattern and setting the sounding time of the chord to the sounding time of the sound on the rhythm pattern.

In the present embodiment, the present invention is applied to an automatic arrangement device used alone. However, the application of the present invention is not limited to such an automatic arrangement device. The automatic arrangement device may be mounted on a tone generator such as an electronic musical instrument or a sequencer, or may be used in connection with an external device. If it is used by connecting to an external device, code data representing the contents of one code (see FIG. 4A) or MID
Arrangement may be performed by processing I data and the like in real time. As is clear from this, the form of the data and the form of actually arranging the data are not limited to the present embodiment.

The program for realizing the operation of the above-mentioned automatic arrangement device or its modified example is RO
It may be recorded on a recording medium such as M, CD-ROM, floppy disk, or magneto-optical disk and distributed. Alternatively, part or all of the program may be distributed via a transmission medium used in a public network or the like. In such a case, the user can acquire the program and load the program into an automatic arrangement device or a data processing device such as a computer, so that the present invention can be applied to the device loaded with the program. For this reason, the program may be accessible by a device that distributes the program.

[0084]

As described above, according to the present invention, for each chord represented by chord progression information, a plurality of combinations of pitches of constituent sounds constituting the chord are assumed, and the assumed pitch Evaluate the combination and according to the evaluation,
Select one of the assumed pitch combinations.
In this way, since the most appropriate combination is selected from a plurality of assumed combinations of pitches, it is possible to automatically arrange music in a form that is musically natural and easy to play.

If the user is allowed to specify the range of pitches to be combined, the music composition reflects the wishes of the user. For this reason, the user
Furthermore, it is possible to automatically arrange music in a form that allows easy performance.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an automatic arrangement device according to the present embodiment.

FIG. 2 is a diagram illustrating a functional configuration of the automatic music arrangement device according to the present embodiment.

FIG. 3 is a diagram illustrating a data configuration of a chord tone database.

FIG. 4 is a diagram illustrating variables handled by the automatic music arrangement device according to the present embodiment.

FIG. 5 is a flowchart of an overall process.

FIG. 6 is a flowchart of a music arrangement process.

FIG. 7 is a flowchart of chord sound selection processing.

FIG. 8 is a flowchart of a chord composition sound count process.

FIG. 9 is a flowchart of a code tone process.

FIG. 10 is a flowchart of an evaluation process.

FIG. 11 is a flowchart of a moving distance evaluation process.

FIG. 12 is a flowchart of a center position evaluation process.

[Explanation of symbols]

 101 CPU 102 ROM 103 RAM 104 Input device 105 Monitor 106 Bus 201 Accompaniment sound determination means 202 Chord sound selection means 203 Evaluation means 204 Chord tone database 211 Chord progress data 212 Accompaniment sound performance data

Claims (8)

[Claims] 1. An apparatus for automatically arranging chord progression information for changing chord progression information for chord progression information representing chord progression information, comprising: an information acquisition unit for acquiring the chord progression information; For each chord represented by the chord progression information acquired by the information acquisition means, a plurality of combinations of pitches of constituent sounds constituting the chord, a hypothesis means, and a combination of the pitches assumed by the hypothesis means. Evaluation means for performing a predetermined evaluation, and selecting means for selecting one of the pitch combinations assumed by the hypothesis means according to the evaluation result of the evaluation means. Automatic arranging device. 2. The combination of pitches assumed by the assumption means is a combination of pitches of a chord represented by the chord progression information and a combination of pitches obtained by turning the combination. The automatic arrangement device according to claim 1, wherein 3. The evaluation means, for each of the pitch combinations assumed by the hypothesis means, a distance from the pitch combination selected for the immediately preceding chord by the selection means, or a predetermined pitch. The automatic arranging device according to claim 1, wherein the predetermined evaluation is performed while focusing on a distance from the automatic arrangement. 4. The evaluating means excludes or considers a combination satisfying a predetermined condition for a pitch between the pitches from among the combinations of pitches assumed by the hypothetical means, and selects the selecting means. 4. The automatic arrangement device according to claim 1, wherein the combination of the pitches is selected. 5. 5. The condition includes at least one of a semitone interval and a perfect fifth interval present with the combination of the intervals selected by the selection means for the immediately preceding chord. The automatic arrangement device according to claim 4, wherein 6. The assuming means refers to data indicating a pitch relationship between constituent sounds constituting the chord for each type of the chord in accordance with an abbreviation of the chord specified in advance. The automatic arrangement device according to any one of claims 1 to 5, wherein a combination of the pitches corresponding to an abbreviation is assumed. 7. A sound range designating means for allowing a user to designate a sound range of the pitch to be combined by the assumption means, wherein the assumption means is configured to: The automatic arrangement device according to any one of claims 1 to 6, wherein a combination of the pitches is assumed within a designated sound range. 8. A program to be executed by a device for automatically arranging chord progression information to be changed for chord progression information representing chord progression contents, the program comprising: a function for acquiring the chord progression information. A function for assuming, for each chord represented by the chord progression information acquired by the acquiring function, a plurality of combinations of pitches of constituent sounds constituting the chord; and a pitch assumed by the assuming function. A function of performing a predetermined evaluation for each combination of: and a function of selecting one of the pitch combinations assumed by the assumed function according to the evaluation result of the evaluated function. program.