JP2004279870A - Program and device for accompaniment data generation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To add an auditorily natural introduction section even when a section where an introduction section as the beginning of music data is to be arranged is short. <P>SOLUTION: The introduction section is automatically added through program processing by a computer. At steps S18 and S24, a section where the introduction section can be arranged is detected. At a step S26, the length of a selected introduction section is compared with the length of the detected section. When the length of the selected introduction section is shorter than the length of the detected section, the selected introduction section is arranged in the detected section through processing at a step S28. When the length of the selected introduction section is longer than the length of the detected section, another section such as a main section and a fill-in section is arranged in the detected section through processing at steps S30 to S48. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD 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 to a song, to song data comprising a performance data sequence for controlling generation of musical tones.
[0002]
[Prior art]
Conventionally, accompaniment patterns composed of an intro section, a main section, a fill-in section, and an ending section are prepared for each accompaniment style, and the accompaniment data is automatically or partially input to the performance data representing the melody. An accompaniment data generation device to add the data is known. In this accompaniment data generation device, music data that is composed of a performance data sequence representing a melody and to which accompaniment data is to be added is specified, and an intro section, a main section, a fill-in section, and an intro section specified by an accompaniment style selected by a user. Accompaniment data is automatically generated by linking an ending section or the like in correspondence with a performance data string representing a melody. More specifically, the intro section and the ending section are added before and after the melody (music main body). As for the main section and the fill-in section, a performance data string representing a melody is analyzed, and based on the analysis, the main section and the fill-in section are added in correspondence with the melody (see Patent Documents 1 and 2). .
[0003]
[Patent Document 1]
Japanese Patent No. 2828119
[Patent Document 2]
Japanese Patent No. 3327188
[0004]
[Problems to be solved by the invention]
Such a prepared intro section usually has a flow that can be completed in one cycle, and its length also varies. In addition, when the start position of the melody, that is, the start position of the music 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 music data is to be arranged. May be longer than length. In this case, in the above prior art, an intro section of less than one cycle was arranged before the start of the melody. However, in this case, an unnatural accompaniment by the intro section ends in the middle or starts from the middle. It will be. To eliminate this unnaturalness, it is necessary for the user to select an accompaniment style based on the length of the beginning of the music data or to move the entire music data backward by several measures. Was.
[0005]
Summary of the Invention
The present invention has been made in order to address the above-described problem, and has as its object the need for special work by the user even when the section where the intro section at the beginning of the music data is to be arranged is short. It is an object of the present invention to provide an accompaniment data generation program and an accompaniment data generation device capable of adding accompaniment data of an introductory part that is natural in hearing.
[0006]
In order to achieve the above object, a structural feature of the present invention is that an intro section, which is an accompaniment pattern used as an introduction to a song, can be arranged from song data relating to one song consisting of a performance data sequence for controlling generation of musical tones. The length of the detected section is determined by comparing the length of the detected section with the length of the selected intro section prepared and selected in advance. If the following, the selected intro section is arranged in the detected section, and if the length of the selected intro section is longer than the length of the detected section, the selected intro section is selected. A section which is another accompaniment pattern is arranged in the detected section.
[0007]
According to this, even if the section in which the beginning intro section 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 audibility can be added without requiring any special work by the user.
[0008]
In addition, the section that is another accompaniment pattern may be, for example, a main section that is used first in a main body of a song represented by song data. 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 music to the main part of the music becomes musically natural.
[0009]
In addition, the section that is another accompaniment pattern is, for example, a combination of a main section used first for a main body of a song represented by song data and a fill-in section of a type connecting two of the main sections. Is also good. According to this, as described above, the transition from the introduction section to the music main body becomes natural and the change due to the fill-in section is added, so that the transition from the intro section to the music main body is natural, The monotony of the flow from the introduction to the song body of the song is eliminated.
[0010]
Further, the user may be allowed to select a section that is the another accompaniment pattern. According to this, a section suitable for the introduction section 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 composed of safe accompaniment patterns that can be commonly used for a plurality of accompaniment styles as sections that can be selected by the user.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an accompaniment data generation program and an accompaniment data generation device according to an embodiment of the present invention will be described. FIG. 1 schematically illustrates an electronic music apparatus to which the accompaniment data generation program is applied and which includes the accompaniment data generation device. It is a block diagram shown in FIG. Examples of the electronic musical apparatus include a keyboard electronic musical instrument, a non-keyboard electronic musical instrument (an electronic musical instrument having a touch plate, a push button, a string, or the like as a performance operator), a sequencer device, a personal computer, and the like.
[0012]
This electronic music apparatus includes an input operator group 11, a display 12, and a tone signal generation circuit 13. The input operator group 11 includes a plurality of operators for instructing the operation of the electronic music apparatus. 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, and also include a white key and a black key in a keyboard electronic musical instrument. The display 12 is configured by a liquid crystal display, a CRT, or the like, and displays characters, numerals, figures, and the like. The display mode of the display 12 is controlled by the display control circuit 15 connected to the bus 20.
[0013]
The tone signal generating circuit 13 is connected to the bus 20 and forms a tone signal based on performance data supplied under the control of a CPU 31 which will be described later, and gives an effect to the tone signal thus formed. Output to the sound system 16. The sound system 16 includes a speaker, an amplifier, and the like, and emits 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, each of which is connected to the bus 20 and constitutes 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 pre-installed in the electronic music device, a compact disk CD and a flexible disk FD that can be mounted on the electronic music device, and a drive unit for each of the recording media. , Making it possible to store and read large amounts 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 executing the program. These programs and music data are stored in the hard disk HD in advance, supplied to the hard disk HD from a compact disk CD, a flexible disk FD, or the like, or externally to the hard disk HD via an external device 41 or a communication network 42 described later. What is supplied.
[0015]
As shown in FIG. 3, one set of accompaniment style data includes a header, one or more sets of intro section data A, B,..., A plurality of sets of main section data A, B, and a plurality of sets of fill-in section data AA, AB, one or more 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, and the like for each accompaniment style data. Each section data includes setting information and pattern data. The setting information includes a section name, the number of measures, setting information of each part, and the like regarding each section data. The pattern data is prepared for each part of the accompaniment sound, and is composed of a performance data string for controlling generation of musical tones 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. This electronic music device can exchange 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, so that the electronic music apparatus 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 addition program of FIG. The execution of this program is started in step S10 of FIG. 2, and in step S12, the user is caused to select music data and an accompaniment style. In the selection of the music data, the user operates the input operator group 11 while viewing the music name list including a plurality of music names displayed on the display unit 12, and operates the plurality of sets stored in the external storage device 35. A set of music data is designated from among the music data. It should be noted that a set of music data can be designated by a drop-down music name list display. As a result, the specified set of music data is read from the external storage device 35 and written to the RAM 34.
[0018]
If the music 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 the other music data via the communication interface circuit 36, or the communication is performed. Desired music data may be read from the outside via the interface circuit 36 and the communication network 42 and written into the RAM 34.
[0019]
Here, the song data will be described. The music data generally includes melody data, chord data, accompaniment data (comprising a plurality of sections), other instrument sound data, lyrics data, and the like. FIG. 4 conceptually shows the accompaniment data and the melody data directly related to the present invention. Accompaniment data is composed of a plurality of sections such as intro, main, fill-in, and ending, and is not normally prepared in advance. Also in the present embodiment, accompaniment data composed of section rows is formed by the processing described later. The melody data is composed of a performance data sequence for generating a plurality of musical tones constituting the melody in accordance with the progress of the music, that is, the passage of time. The performance data string includes at least musical sound generation mode setting data, note-on data, note-off data, and event data such as end data arranged in chronological order according to the progress of the music.
[0020]
The tone generation mode setting data represents the tone color and volume of the tone controlled by the note-on data, the effect given to the tone, and the like. When the reproduction of the music data starts, the tone signal generation circuit 13 outputs the tone signal. It is used to initialize the generation mode and to change the generation mode of the music signal during the reproduction of the music data. The note-on data instructs the start of generation of a musical tone, and includes identification data indicating that the musical note is on, note number data indicating the note name (frequency) of the musical tone to be generated, and the like. The note-off data instructs the end of generation of a musical tone, and includes identification data indicating that the musical note is off, note number data indicating the note name (frequency) of the musical tone being generated, 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 indicates the control timing of each event data by, for example, the number of measures from the beginning, the number of beats from the beginning of the measure, the number of clocks in the beat (clock timing in the beat), and the like. In the example of FIG. 4, the timing at which the melody performance is started, that is, the first note of the melody is at the beginning of the fifth bar, and the timing at which the melody performance ends is at the end of the fourteenth bar. The tone generation mode setting data for initial setting of the tone signal generation mode is usually prepared near the beginning of the performance data, that is, at the beginning of the first bar.
[0022]
In the selection of the accompaniment style in step S12, the user operates the input operator group 11 while viewing the drop-down list on the display 12 as shown in FIG. A set of accompaniment style data is designated from 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 designated from an accompaniment style name list in which a plurality of accompaniment style names are displayed on the display unit 12. Also, instead of specifying one type of accompaniment style for one song as described above, a different accompaniment style may be assigned to each section.
[0023]
As a result, the specified 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 the other accompaniment style data via the communication interface circuit 36, or the communication is performed. Desired accompaniment style data may be read from the outside via the interface circuit 36 and the communication network 42 and written into the RAM 34.
[0024]
After the process in step S12, the CPU 31 accepts an input of a startable measure number MNit of the intro section in step S14. In the accepting process of the intro startable bar number MNit, the user operates the input operator group 11 while watching the music progress diagram (for example, see FIG. 4) displayed on the display unit 12, so that the intro startable bar number can be obtained. Enter the number MNit. In this case, since the tone generation mode setting data is normally stored near the beginning of the first measure as described above, 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 gives a section string, that is, accompaniment data to the music data. Specifically, as described in the section of the prior art, the melody data, which is a well-known technique in this field, is automatically analyzed, and in some cases, some information is externally input, and the analysis result is obtained. First, based on the accompaniment style input in step S12 in addition to the external input, a section row including a plurality of main sections and fill-in sections suitable for the melody represented by the melody data is formed. As for the intro section, an intro section that matches the first main section (for example, main A) of the song main part is selected from one or a plurality of intro sections belonging to the first accompaniment style of the song main part. One cycle of the selected intro section is arranged before the start of the music body. As for the ending section, an ending section that matches the last main section (for example, main B) of the same tune main body is selected from one or a plurality of ending sections belonging to the last accompaniment style of the tune main body. One cycle of the selected ending section is arranged before the start of the music body. However, this intro section is tentatively determined.
[0026]
Next, in step S18, the music body start bar number MNbd is automatically detected from the music data. Since the music body start bar number MNbd indicates the melody start timing, the melody start timing is set as the music body start bar number MNbd by referring to the melody data. If the intro startable measure number MNit is equal to or greater than the music body section start measure number MNbd, "Yes" is determined in step S20, and the execution of the accompaniment addition program is terminated in step S50. This is because if the intro startable measure number MNit is equal to or larger than the music body section start measure number MNbd, there is no section where the intro section is arranged.
[0027]
On the other hand, if the intro startable measure number MNit is smaller than the music body part start measure number MNbd, “No” is determined in step S20, and the music body part start measure number is determined from the intro startable measure number MNit in step S22. Clear section data existing up to MNbd. Of course, if section data does not exist in this section, the clearing process is unnecessary.
[0028]
Next, in step S24, the section (number of measures) MNbd-MNit in which the intro section can be arranged is calculated by subtracting the intro startable measure number MNit from the music body section start measure number MNbd. Next, in step 26, it is determined whether or not the length (number of measures) of one cycle of the intro section to be used determined by the processing in step S16 is equal to or less than the intro allocable section MNbd-MNit.
[0029]
If the length (the number of measures) of one cycle of the intro section to be used is equal to or less than the intro-arrangeable section MNbd-MNit, in step S28, one cycle of the intro section provisionally determined by the process of step 16 is performed. Is inserted in the accompaniment data and immediately before the music body start bar number MNbd (see the lower left of FIG. 4). Then, in step S50, the execution of the accompaniment addition program ends. On the other hand, if the length (number of measures) of one cycle of the to-be-used intro section is larger than the intro-arrangeable section MNbd-MNit, the process of determining an intro substitute section in step S30 is executed. There are two types of processing for determining the intro substitute section.
[0030]
The first method allows a 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 that appears at the beginning of the music body as the intro substitute section 1, and “Fill-in AA”, which is the fill-in section that first appears as the intro substitute section 2. (1) "is displayed. The numbers in parentheses in the above display indicate the number of measures for one cycle of the main intro section A and the fill-in section AA. Then, if the user maintains the current display state without operating the input operator group 11, the main section and the 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 down buttons of the displayed intro substitute sections 1 and 2, respectively, all sections belonging to the displayed accompaniment style are displayed as a list of intro substitute sections 1 and 2 as candidates. . Then, the user selects an arbitrary section from all the sections displayed in the list. This makes it possible to select, as the intro substitute section 1, the same main section as the first main section used for the music main body. In addition, 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 first main section used for the music main body. 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 of determining the intro substitute sections 1 and 2 is to automatically determine the intro substitute sections 1 and 2. In this case, without displaying the selection screen of the intro substitute section as described above on the display 21, the main section of the accompaniment data used first for the main part of the music represented by the music data, that is, the melody, is replaced with the intro substitute section. 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 the process of determining an intro substitute section in step S30, when the intro arrangeable section (number of measures) MNbd-MNin has only one measure, it is also selected which of the intro substitute sections 1 and 2 has priority. . In this case, as shown in FIG. 5, one of the displays "use intro substitute section 1" and "use intro substitute section 2" on 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 section (number of measures) MNbd-MNin in which the intro can be arranged is one measure. If the section (number of measures) MNbd-MNin where the intro can be arranged is one measure, it is determined as "Yes" in step S32, and the process proceeds to step S34 and thereafter. In this case, if the intro substitute section 1 has priority or if the intro substitute section 2 is "none", the process proceeds to step S38 by the determination processing 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 designated 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 bar, a part of the same section (for example, one bar from the beginning or the last bar) 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 processing of steps S34 and S36. In step S40, one measure of the section corresponding to the intro substitute section 2 is written to the timing position designated by the intro startable measure number MNin.
[0036]
On the other hand, if the section (number of measures) MNbd−MNin that can be arranged in the intro is longer than one measure, “No” is determined in the step S32, and the processing after the step S42 is executed. In this case, if the intro substitute section 2 is "none", the process proceeds to step S44 by the determination processing of step S42. In step S44, a section corresponding to the intro substitute section 1 is written from the MNin measure start position to the MNbd measure start position, which is the section where intro placement is possible.
[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 a section from the measure corresponding to the intro startable measure number MNin to one measure before the music body section start measure number MNbd. In step S48, one measure of the section corresponding to the intro substitute section 2 is written to a measure position one measure before the music body part start measure 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 music data of one music by the processing of steps S18 and S24 in FIG. Then, by the processing of step S26, the length of one cycle of the intro section to be used is compared with the length of the detected section, and the length of the section of one cycle of the intro section to be used is detected. If not, by the process of step S28, the intro section to be used is arranged in the section where the intro section is detected. On the other hand, if the length of one cycle of the intro section to be used is longer than the length of the detected section, another section is placed in the detected section by the processing of steps S30 to S48. In this case, another section may be the first main section of the main body (melody) in the accompaniment data string, a fill-in section of a type that connects the main sections, or the fill-in section may be added to the main section. It is connected. Therefore, according to the above embodiment, even if the section where the intro section at the beginning of the music data is to be arranged is short, the user can add an intro section or a substitute section that is natural in hearing without requiring any special work by the user. can do
[0039]
Further, by the processing of steps S30 to S36 and S42, the another section is selected by the user as an intro substitute section. Thus, an intro section reflecting the user's preference and intention is added.
[0040]
Furthermore, the implementation of the present invention is not limited to the above embodiment and its modifications, and various modifications can be made without departing from the purpose of the present invention.
[0041]
For example, in the above embodiment, in step S30 of FIG. 2, the intro substitution sections 1 and 2 are selected from the sections belonging to the accompaniment style selected by the processing of step S12. However, instead of this, as sections that can be selected as the intro substitute sections 1 and 2, a plurality of types of sections composed of safe accompaniment patterns that can be commonly used for a plurality of accompaniment styles are prepared in advance, and the user In step S30, the intro substitute sections 1 and 2 may be selected from the plurality of prepared sections.
[0042]
In the above embodiment, since the tone generation mode setting data is usually arranged in the first measure of the music data, the first measure is excluded as a section in which an intro section can be arranged. If possible, the intro section may be arranged from the first bar. In this case, “1” may be specified as the measure number MNit at which intro start is possible in step S14.
[0043]
Further, in the above embodiment, when there is only one measure in the section (measure) MNbd-MNit where the intro can be arranged, the intro substitute section is arranged for one measure. Is also good. In this case, the processing of steps S34 to S40 may be omitted.
[0044]
In the above embodiment, the accompaniment data added to the music 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]
Further, in the processing of steps S46 and S48 in FIG. 2 of the above embodiment, a combination of the main section and the fill-in section is used as the intro substitute section data, but 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, in the process of step S30 in FIG. 2, the intro substitute section 3 may be set in addition to the intro substitute sections 1 and 2. Also, regarding the method of dividing the length, for example, using the display 21 and the input operator group 11, the user can use the ratio between the intro substitute section 1 and the intro substitute section 2 (for example, 50%, 50%, etc.). ) May be designated, and the lengths of the intro substitute sections 1 and 2 may be determined according to the ratio.
[0046]
Further, the present invention can be applied to music data having a main section, even if the music data does not include melody data. In this case, a section between several bars before the start of the main section may be set as the intro allocable section.
[Brief description of the drawings]
FIG. 1 is an overall block diagram of an electronic music device according to an embodiment of the present invention.
FIG. 2 is a flowchart showing an accompaniment addition program executed by the electronic music device.
FIG. 3 is a data format showing accompaniment style data stored in an external storage device of the electronic music device.
FIG. 4 is a conceptual diagram of music data when accompaniment data including a plurality of sections is added to melody data.
FIG. 5 is a diagram showing a display screen of a display unit during execution of the accompaniment addition program.
[Explanation of symbols]
11 input operation group, 13 musical tone signal generating circuit, 31 CPU, 33 ROM
34 RAM, 35 external storage device, 36 communication interface circuit.

Claims (5)

A detecting 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 sequence for controlling generation of musical tones;
A comparing step of comparing the length of the detected section with the length of the intro section selected and prepared in advance,
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 arranged in the detected section, and the length of the selected intro section is Arranging a section, which is an accompaniment pattern different from the selected intro section, in the detected section if the length is longer than the length of the detected section. 2. The computer-readable recording medium according to claim 1, wherein the section that is another accompaniment pattern is a main section that is used first in a main body of a song represented by the song data. 3. 2. The section that is another accompaniment pattern is a combination of a main section used first for a main body of a song represented by the song data and a fill-in section of a type that connects the two main sections. 3. Accompaniment data generation program described in. The accompaniment data generation program according to claim 1, further comprising a selection step for causing a user to select a section that is the different accompaniment pattern. Storage means for storing music data relating to one music composed of a performance data sequence for controlling generation of musical sounds;
Detecting means for detecting a section in which an intro section, which is an accompaniment pattern used as an introduction to a song, can be arranged from song data stored in the storage means;
Comparison means for comparing the length of the detected section with the length of the intro section selected and prepared in advance,
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 arranged in the detected section, and the length of the selected intro section is An accompaniment data generating apparatus, comprising: an arrangement unit for arranging a section, which is an accompaniment pattern different from the selected intro section, in the detected section if the length is longer than the length of the detected section.

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