JP3903937B2 - Accompaniment data generation program and accompaniment data generation apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an accompaniment data generation program and an accompaniment data generation apparatus for automatically adding an intro section, which is an accompaniment pattern used as an introduction of music, to music data composed of a performance data string for controlling the generation of musical sounds.
[0002]
[Prior art]
Traditionally, accompaniment patterns consisting of an intro section, main section, fill-in section, and ending section are prepared for each accompaniment style, and accompaniment data is automatically or partly manually input to performance data representing the melody. Accompaniment data generation apparatuses to be added are known. In this accompaniment data generation device, an intro section, a main section, a fill-in section, which is composed of a performance data string representing a melody and which specifies music data to which accompaniment data is to be added, specified by an accompaniment style selected by the user, Accompaniment data is automatically generated by concatenating ending sections and the like in association with a performance data string representing a melody. Specifically, the intro section and the ending section are added before and after the melody (music main body), respectively. As for the main section and the fill-in section, a performance data string representing a melody is analyzed, and the main section and the fill-in section are added corresponding to the melody based on the analysis (see Patent Documents 1 and 2). .
[0003]
[Patent Document 1]
Japanese Patent No. 28828119
[Patent Document 2]
Japanese Patent No. 3327188
[0004]
[Problems to be solved by the invention]
Such an intro section prepared in advance usually has a flow that can be completed in one cycle, and its length varies. In addition, when the start position of the melody, that is, the start position of the song main body is determined, the length of the intro section specified by the selected accompaniment style is the length of the portion where the intro section at the beginning of the song data is to be placed. May be longer than length. In this case, in the prior art, an intro section of less than one cycle was arranged before the start of the melody, but this is unnatural in terms of audibility that the automatic accompaniment by the intro section ends or starts in the middle. It will be a thing. In order to eliminate this unnaturalness, it is necessary for the user to select an accompaniment style based on the length of the beginning of the song data, or to move the entire song data backward by several bars. It was.
[0005]
SUMMARY OF THE INVENTION
The present invention was made in order to cope with the above-described problem, and the purpose thereof is that even if the section in which the intro section at the beginning of the song data is to be arranged is short, no special work by the user is required. It is an object to provide an accompaniment data generation program and an accompaniment data generation apparatus that can add accompaniment data of an introduction part that is natural in terms of hearing.
[0006]
In order to achieve the above object, the constitutional feature of the present invention is that an intro section, which is an accompaniment pattern used as a song introduction, can be arranged from song data relating to one song consisting of a performance data string for controlling the generation of musical sounds. And the length of the selected intro section prepared in advance and compared with the length of the detected section, and the length of the selected intro section is the length of the detected section. If the selected intro section is placed in the detected section and the length of the selected intro section is greater than the length of the detected section if In other words, a section having a different accompaniment pattern is arranged in the detected section.
[0007]
According to this, even if the section in which the intro section at the beginning of the music data is to be arranged is short, another section having an appropriate length can be arranged as the intro section. Therefore, an intro section that is natural in terms of hearing can be added without requiring any special work by the user.
[0008]
The section that is another accompaniment pattern may be a main section that is first used in the main body of a song represented by song data, for example. According to this, an unnatural transition from the intro section to the first main section is avoided, and the transition from the introduction part of the song to the main part of the song becomes musically natural.
[0009]
Further, the section which is another accompaniment pattern is, for example, a combination of a main section first used in the main body of a song represented by song data and a fill-in section of a type connecting the two main sections. Also good. According to this, as described above, the transition from the introduction section to the song main body becomes natural, and the change by the fill-in section is added, so the transition from the intro section to the song main body is natural, The monotonous flow from the song introduction to the song body is eliminated.
[0010]
Furthermore, the user may select a section that is another accompaniment pattern. According to this, a section suitable for the introduction part reflecting the user's preference and intention is added. In this case, for example, it is convenient to prepare in advance a plurality of types of sections including safe accompaniment patterns that can be commonly used for a plurality of accompaniment styles as sections that can be selected by the user.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an accompaniment data generation program and an accompaniment data generation apparatus according to an embodiment of the present invention will be described. FIG. 1 schematically illustrates an electronic music apparatus to which an accompaniment data generation program is applied and which includes an accompaniment data generation apparatus. It is a block diagram shown in FIG. Examples of the electronic music device include a keyboard-type electronic musical instrument, a non-keyboard-type electronic musical instrument (an electronic musical instrument having a touch plate, a push button, a string, etc. as a performance operator), a sequencer device, a personal computer, and the like.
[0012]
This electronic music apparatus has an input operator group 11, a display 12, and a musical tone signal generation circuit 13. The input operator group 11 includes a plurality of operators for instructing the operation of the electronic music apparatus, and the operations of the plurality of operators are detected by a detection circuit 14 connected to the bus 20. The plurality of operators include a switch operator, a volume operator, a mouse, and the like. In a keyboard type electronic musical instrument, a white key and a black key are also included. The display 12 includes a liquid crystal display, a CRT, and the like, and displays characters, numbers, figures, and the like. The display mode of the display 12 is controlled by a display control circuit 15 connected to the bus 20.
[0013]
The musical tone signal generation circuit 13 is connected to the bus 20 and forms a musical tone signal based on performance data supplied under the control of a CPU 31 to be described later, and gives an effect to the musical tone signal thus formed. Output to the sound system 16. The sound system 16 includes a speaker, an amplifier, and the like, and generates a tone corresponding to the tone signal from the tone signal generation circuit 13.
[0014]
The electronic music apparatus includes a CPU 31, a timer 32, a ROM 33, and a RAM 34 that are connected to the bus 20 and constitute a microcomputer main body, and also includes an external storage device 35 and a communication interface circuit 36. The external storage device 35 includes various recording media such as a hard disk HD preinstalled in the electronic music device, a compact disc CD that can be mounted on the electronic music device, and a flexible disk FD, and a drive unit for each of the recording media. It is possible to store and read a large amount of data and programs. In the case of the present embodiment, the hard disk HD stores various programs including the accompaniment addition program of FIG. 2 and a plurality of sets of accompaniment style data used when the program is executed. These programs and song data are stored in advance in the hard disk HD, supplied to the hard disk HD from a compact disk CD, a flexible disk FD, or the like, or from the outside via the external device 41 or the communication network 42 described later to the hard disk HD. To be supplied.
[0015]
As shown in FIG. 3, the set of accompaniment style data includes a header, a set or a plurality of sets of intro section data A, B..., A plurality of sets of main section data A, B. AB ..., one set or a plurality of sets of ending data A, B, etc. The fill-in section data AA is data suitable for insertion between the main section data A and A, and the fill-in section data AB is data suitable for insertion between the main section data A and B. The header includes data representing the accompaniment style name, time signature, tempo, etc. for each accompaniment style data. Each section data consists of setting information and pattern data. The setting information includes a section name related to each section data, the number of measures, setting information for each part, and the like. The pattern data is prepared for each part of the accompaniment sound and is composed of a performance data string for controlling the generation of musical sounds including pitch, timing and the like. This performance data string is the same as melody data described later.
[0016]
The communication interface circuit 36 can be connected to an external device 41 such as another electronic musical instrument or a personal computer, and the electronic music apparatus can communicate various programs and data with the external device 41. The communication interface circuit 36 can also be connected to the outside via a communication network 42 such as the Internet, and this electronic music device can communicate various programs and data with the outside.
[0017]
Next, the operation of the embodiment configured as described above will be described. First, the user operates the input operator group 11 to cause the CPU 31 to execute the accompaniment adding program of FIG. The execution of this program is started in step S10 in FIG. 2, and the user is allowed to select song data and accompaniment style in step S12. In the selection of the song data, the user operates the input operator group 11 while looking at the song name list composed of a plurality of song names displayed on the display unit 12, and stores a plurality of sets stored in the external storage device 35. A set of song data is designated from the song data. Note that a set of song data can be specified by a drop-down list of song names. As a result, the designated set of music data is read from the external storage device 35 and written to the RAM 34.
[0018]
If the song data desired by the user is not stored in the external storage device 35, the desired song data is read from the external device 41 storing other song data or communicated via the communication interface circuit 36. Desired music data may be read from the outside via the interface circuit 36 and the communication network 42 and written to the RAM 34.
[0019]
Here, the music data will be described. The song data generally includes melody data, chord data, accompaniment data (consisting of a plurality of sections), other instrument sound data, lyrics data, and the like. FIG. 4 conceptually shows accompaniment data and melody data directly related to the present invention. Accompaniment data is composed of a plurality of sections such as an intro, main, fill-in, and ending, and is usually not prepared in advance. Also in the present embodiment, accompaniment data composed of section rows is formed by processing described later. The melody data is composed of a performance data string for generating a plurality of musical sounds constituting the melody as the music progresses, that is, as time passes. The performance data string includes at least event data such as tone generation mode setting data, note-on data, note-off data, end data, etc. arranged in time series according to the progress of the music.
[0020]
The musical tone generation mode setting data represents the tone color, volume, and effects given to the musical tone that are controlled by note-on data, and the musical tone signal generated by the musical tone signal generation circuit 13 at the start of music data reproduction. It is used for initializing the generation mode and changing the generation mode of the same tone signal during reproduction of the music data. The note-on data is used to instruct the start of generation of a musical sound, and includes identification data indicating that the note is on, note number data indicating the note name (frequency) of the generated musical sound, and the like. The note-off data is used to instruct the end of the generation of the musical sound, and includes identification data indicating that the musical note is off, note number data indicating the note name (frequency) of the generated musical sound, and the like. The end data indicates the end of the performance data string of each track.
[0021]
Each of these event data is accompanied by timing data. The timing data represents the control timing of each event data by, for example, the number of measures from the beginning, the number of beats from the beginning in the measure, the number of clocks within the beat (clock timing within the beat), and the like. In the example of FIG. 4, the timing at which the melody performance starts, that is, the first note of the melody is at the beginning of the fifth measure, and the timing at which the melody performance ends is at the end of the fourteenth measure. The tone generation mode setting data for initially setting the tone signal generation mode is usually prepared near the beginning of the performance data, that is, at the beginning of the first measure.
[0022]
In the selection of the accompaniment style in step S12, the user operates the input operator group 11 while looking at the drop-down list on the display unit 12 as shown in FIG. One set of accompaniment style data is designated from among a plurality of sets of accompaniment style data stored in. As in the selection of the music data, a set of accompaniment style data may be specified from an accompaniment style name list in which a plurality of accompaniment style names are displayed on the display unit 12. Further, instead of specifying one type of accompaniment style for one piece of music as described above, a different accompaniment style may be assigned to each section.
[0023]
As a result, the designated set of accompaniment style data is read from the external storage device 35 and written to the RAM 34. If the accompaniment style data desired by the user is not stored in the external storage device 35, the desired music data is read from the external device 41 storing other accompaniment style data or communicated via the communication interface circuit 36. Desired accompaniment style data may be read from the outside via the interface circuit 36 and the communication network 42 and written to the RAM 34.
[0024]
After the process of step S12, the CPU 31 receives an input of the startable bar number MNit of the intro section in step S14. In the process of accepting the intro startable bar number MNit, the user operates the input operator group 11 while looking at the music progression diagram displayed on the display 12 (see, for example, FIG. 4), thereby enabling the intro startable bar. Enter the number MNit. In this case, as described above, the musical tone generation mode setting data is normally stored in the vicinity of the head of the first measure. Therefore, the second measure is usually set to the intro startable measure number MNit. Instead of the input by the user, the second measure may be automatically set as the intro startable measure number MNit.
[0025]
Next, in step S16, the CPU 31 automatically assigns a section string, that is, accompaniment data, to the song data. Specifically, as described in the section of the prior art above, the melody data, which is a well-known technique in this field, is automatically analyzed, and in some cases, some information is input from the outside, and the analysis result Based on the accompaniment style input in step S12 in addition to the external input, first, a section row composed of a plurality of main sections and fill-in sections suitable for the melody represented by the melody data is formed. For the intro section, select an intro section that matches the first main section (for example, main A) of the same song body from one or more intro sections belonging to the first accompaniment style of the song body, One cycle of the selected intro section is arranged before the start of the song body. For the ending section, select the ending section that matches the main section (for example, main B) at the end of the song body from one or more ending sections belonging to the accompaniment style at the end of the song body, One cycle of the selected ending section is arranged before the start of the song body. However, this intro section is only tentatively decided.
[0026]
Next, in step S18, the music body start measure number MNbd is automatically detected from the music data. Since the music main body start measure number MNbd indicates the start timing of the melody, the melody start timing is set as the music main body start measure number MNbd by referring to the melody data. If the intro startable bar number MNit is greater than or equal to the music main body start bar number MNbd, “Yes” is determined in step S20, and the execution of the accompaniment adding program is terminated in step S50. This is because if the intro startable bar number MNit is greater than or equal to the music main body start bar number MNbd, there may be no section for placing the intro section.
[0027]
On the other hand, if the intro startable bar number MNit is smaller than the music main body start bar number MNbd, “No” is determined in step S20, and the intro startable bar number MNit is determined from the intro startable bar number MNit in step S22. Section data existing up to MNbd is cleared. Of course, if there is no section data in this section, the clearing process is unnecessary.
[0028]
Next, in step S24, a section (number of bars) MNbd-MNit in which the intro section can be arranged is calculated by subtracting the intro startable bar number MNit from the music main body start bar number MNbd. Next, in step 26, it is determined whether the length (number of measures) of one cycle of the intro section scheduled to be used determined by the processing in step S16 is equal to or shorter than the intro-placeable section MNbd-MNit.
[0029]
If the length (number of bars) of one cycle of the intro section to be used is equal to or shorter than the intro-placeable section MNbd-MNit, one cycle of the intro section temporarily determined by the processing of step 16 in step S28. Is inserted in the accompaniment data and immediately before the music main body start measure number MNbd (see the lower left in FIG. 4). In step S50, the execution of the accompaniment adding program is terminated. On the other hand, if the length (number of measures) of one cycle of the intro section to be used is larger than the intro-placeable section MNbd-MNit, the intro substitute section determination process in step S30 is executed. There are two methods for determining the intro substitute section.
[0030]
The first method allows the user to select an arbitrary intro substitute section from a plurality of sections prepared in advance. In this case, for example, as shown in FIG. 5, first, section names according to predetermined criteria are displayed as intro substitute sections 1 and 2. FIG. 5 shows “main A (4)” which is the main section appearing at the beginning of the song main body section as the intro substitute section 1 and “fill in AA” which is the fill in section appearing at the beginning of the song main section as the intro substitute section 2. The example which displayed (1) "is shown. The numbers in parentheses in the display indicate the number of bars for one cycle of the main intro section A and the fill-in section AA. If the current display state is maintained without the user operating the input operator group 11, the main section and fill-in section in the display state are set as the intro substitute sections 1 and 2, respectively.
[0031]
Next, a case where the user changes the intro substitute sections 1 and 2 will be described. In this case, for example, when the user clicks on the down buttons of the displayed intro substitute sections 1 and 2, all sections belonging to the displayed accompaniment style are displayed as a list of intro substitute sections 1 and 2, respectively. . Then, the user selects an arbitrary section from all the sections displayed in the list. As a result, it is possible to select the same main section as the intro substitute section 1 that is the same as the first main section used in the song main body. Further, as the intro substitute section 2, it is possible to select the same fill-in section as the fill-in section for connecting the same main section as the main section used first in the music body section. As for the intro substitute section 2, it is also possible to select “none” indicating that the intro substitute section 2 is not used.
[0032]
The second method for determining the intro substitute sections 1 and 2 is to automatically determine the intro substitute sections 1 and 2. In this case, the main section in the accompaniment data first used for the main part of the song represented by the song data, that is, the melody, is displayed without displaying the selection screen for the intro substitute section as described above on the display 21. Set as 1. At the same time, a fill-in section suitable for connecting the same main section as the main section set as the intro substitute section 1 is set as the intro substitute section 2.
[0033]
In addition, in the intro substitution section determination process in step S30, when the intro arrangement possible section (number of bars) MNbd-MNin has only one bar, it is also selected which of the intro substitution sections 1 and 2 has priority. . In this case, as shown in FIG. 5, any one of the display “use intro substitute section 1” and “use intro substitute section 2” on the display 21 may be clicked. FIG. 5 shows an example in which the intro substitute section 2 is prioritized.
[0034]
Next, in step S32, it is determined whether the intro-arrangeable section (number of bars) MNbd-MNin is one bar. If the intro-placeable section (number of bars) MNbd-MNin is one bar, it is determined as “Yes” in step S32, and the process proceeds to step S34 and subsequent steps. In this case, if the intro substitute section 1 is prioritized or the intro substitute section 2 is “none”, the process proceeds to step S38 by the determination process of steps S34 and S36. In step S38, one measure of the main section corresponding to the intro substitute section 1 is written at the timing position specified by the intro startable measure number MNin. If the length of one cycle of the main section corresponding to the intro substitute section 1 is longer than one measure, a part of the same section (for example, one measure from the beginning or the last one measure) is written.
[0035]
If the intro substitute section 2 is prioritized and the intro substitute section 2 is not “none”, the process proceeds to step S40 by the determination process of steps S34 and S36. In step S40, one bar of the section corresponding to the intro substitute section 2 is written at the timing position specified by the intro startable bar number MNin.
[0036]
On the other hand, if the intro-arrangeable section (number of bars) MNbd−MNin is longer than one bar, it is determined as “No” in step S32, and the processes after step S42 are executed. In this case, if the intro substitute section 2 is “none”, the process proceeds to step S44 by the determination process in step S42. In step S44, the section corresponding to the intro substitute section 1 is written from the MNin measure start position to the MNbd measure start position, which is an intro-placeable section.
[0037]
If the intro substitute section 2 is not “none”, the processing of steps S46 and S48 is executed by the determination processing in step S42. In step S46, the section corresponding to the intro substitute section 1 is written in the section from the bar corresponding to the intro startable bar number MNin to the previous bar of the music body part starting bar number MNbd. In step S48, one bar of the section corresponding to the intro substitute section 2 is written at a bar position one bar before the music main body start bar number MNbd.
[0038]
As can be understood from the above description of the operation, a section in which a section as an introduction section can be arranged is detected from the song data relating to one song by the processing of steps S18 and S24 in FIG. Then, the length of one cycle of the intro section scheduled to be used is compared with the length of the detected section by the processing of step S26, and the length of the section where the length of one cycle of the intro section scheduled to be used is detected. If it is less than or equal to, the intro section scheduled to be used is arranged in the section in which the intro section to be used is detected by the process of step S28. On the other hand, if the length of one cycle of the intro section scheduled to be used is longer than the length of the detected section, it is arranged in the section in which another section is detected by the processing of steps S30 to S48. Another section in this case is the first main section of the song body (melody) in the accompaniment data string, a fill-in section of the type connecting the main sections, or the fill-in section in the main section. It is connected. Therefore, according to the above-described embodiment, even if the section in which the intro section at the beginning of the song data is to be arranged is short, the intro section or substitute section that is natural to hearing is added without requiring any special work by the user. can do
[0039]
Further, the other section is selected by the user as an intro substitute section through the processing of steps S30 to S36 and S42. As a result, an intro section reflecting the user's preferences and intentions is added.
[0040]
Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment and its modifications, and various modifications can be made without departing from the object of the present invention.
[0041]
For example, in the above embodiment, intro substitute sections 1 and 2 are selected from the sections belonging to the accompaniment style selected in step S12 in step S30 of FIG. However, instead of this, as a section that can be selected as the intro substitute sections 1 and 2, a plurality of types of sections having safe accompaniment patterns that can be commonly used for a plurality of accompaniment styles are prepared in advance, and the user can In step S30, the intro substitute sections 1 and 2 may be selected from the plurality of types of prepared sections.
[0042]
In the above embodiment, since the musical tone generation mode setting data is usually arranged at the first bar of the song data, the first bar is excluded as the section where the intro section can be arranged, but the intro section is arranged. If possible, the intro section may be arranged from the first bar. In this case, “1” may be designated as the intro startable bar number MNit in step S14.
[0043]
In the above embodiment, the intro substitute section (bar) MNbd-MNit has only one bar, but the intro substitute section is arranged for one bar. Also good. In this case, the processing in steps S34 to S40 may be omitted.
[0044]
In the above embodiment, the accompaniment data added to the song data is section data belonging to the same accompaniment style. However, instead of this, section data belonging to a plurality of types of accompaniment styles may be mixed and added to the music data.
[0045]
In the processing of steps S46 and S48 in FIG. 2 of the above embodiment, the combination of the main section and the fill-in section is used as the intro substitute section data. However, the combination and length can be variously changed. It is. For example, two different main sections and a fill-in section may be connected. In this case, the intro substitute section 3 may be set in addition to the intro substitute sections 1 and 2 in the process of step S30 in FIG. Also, regarding the way of dividing the length, for example, the display 21 and the input operator group 11 are used to give the user a ratio between the intro substitute section 1 and the intro substitute section 2 (for example, 50%, 50%, etc.). ) May be specified, and the lengths of the intro substitute sections 1 and 2 may be determined according to the ratio.
[0046]
Furthermore, the present invention can be applied to music data that includes a main section even if melody data is not included in the music data. In this case, a section between several bars before the start of the main section may be set as an intro-placeable section.
[Brief description of the drawings]
FIG. 1 is an overall block diagram of an electronic music apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing an accompaniment addition program executed by the electronic music apparatus.
FIG. 3 is a data format representing accompaniment style data stored in an external storage device of the electronic music device.
FIG. 4 is a conceptual diagram of song data when accompaniment data composed of a plurality of sections is added to melody data.
FIG. 5 is a diagram showing a display screen of a display device during execution of the accompaniment adding program.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Input operator group, 13 ... Musical tone signal generation circuit, 31 ... CPU, 33 ... ROM, 34 ... RAM, 35 ... External storage device, 36 ... Communication interface circuit

Claims (5)

A detection step of detecting a section in which an intro section, which is an accompaniment pattern used as an introduction of a song, can be arranged from song data relating to one song composed of a performance data string for controlling the generation of musical sounds;
A comparison step comparing the length of the intro section prepared and selected in advance with the length of the detected section;
If the length of the selected intro section is less than or equal to the length of the detected section, the selected intro section is placed in the detected section, and the length of the selected intro section is An accompaniment data generation program including an arrangement step of arranging a section, which is an accompaniment pattern different from the selected intro section, in the detected section if it is longer than the length of the detected section. The accompaniment data generation program according to claim 1, wherein the section that is another accompaniment pattern is a main section that is first used in a main part of a song represented by the song data. 2. The section that is another accompaniment pattern is a combination of a main section that is first used in a main body of a song represented by the song data and a fill-in section that connects the two main sections. Accompaniment data generation program described in 2. The accompaniment data generation program according to claim 1, further comprising a selection step for allowing a user to select a section which is the other accompaniment pattern. Storage means for storing song data relating to one song composed of a performance data string for controlling the generation of musical sounds;
Detecting means for detecting a section in which an intro section, which is an accompaniment pattern used as a song introduction, can be arranged from the song data stored in the storage means;
A comparison means for comparing the length of the intro section prepared and selected in advance with the length of the detected section;
If the length of the selected intro section is less than or equal to the length of the detected section, the selected intro section is placed in the detected section, and the length of the selected intro section is An accompaniment data generation device including arrangement means for arranging a section, which is an accompaniment pattern different from the selected intro section, in the detected section if the length of the detected section is longer than the length of the detected section.

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