JP2004294595A - Device and program for automatic accompaniment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a program for automatic accompaniment that can obtain natural automatic accompaniment data even when 2nd and succeeding pieces of chord information are supplied in the middle of an automatic accompaniment of a section. <P>SOLUTION: According to an accompaniment style supplied from an accompaniment style section indication information supply part 1 and section indication information of the accompaniment style, a chord change control part 3 reflects effective starting chord information on an automatic accompaniment data generation part 4 at the start of an automatic accompaniment when chord progression is taken into consideration as to pattern data determined by the automatic accompaniment data generation part 4, but does not reflect 2nd and succeeding pieces of chord information specified in the middle of the automatic accompaniment of each section on the automatic accompaniment data generation part 4. Thus, when the pattern data of a section of the accompaniment style are determined while the chord progression is taken into consideration, the 2nd and succeeding pieces of chord information specified in the middle of the automatic accompaniment of the section are ignored, so natural automatic accompaniment data are obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic accompaniment device that automatically creates accompaniment data.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, automatic accompaniment is performed by automatically generating accompaniment data when a user actually plays a melody or automatically playing a melody using song data, and playing back the accompaniment data together with the melody performance. .
When performing such automatic accompaniment, the accompaniment style is set, and the chord information is reflected on the pattern data corresponding to the set accompaniment style to create the automatic accompaniment data (see Patent Document 1).
For example, according to the type of input chord (chord information), a key code (pitch) in a source pattern (pattern data) stored according to an accompaniment style is converted, and the total pitch is converted to the root of the input chord information. It shifts according to the sound, and generates an accompaniment sound with a pitch that matches the input chord information.
In order to convert the pitch data of the pattern data created by the predetermined code information to match the type of the input code information, the shift data for the pitch of the pattern data is associated with the type of the code information as a note conversion table. The shift data corresponding to the type of the input chord information is read out from the note conversion table, and the read shift data is calculated with the pitch of the source pattern to obtain an accompaniment tone corresponding to the type of the chord information. It has gained.
[0003]
Here, the accompaniment style includes a "main section" mainly used for the main part (melody playing section) of the music, an "intro section" mainly used before the melody playing section, an "ending section" mainly used after the melody playing section, and the like. And a plurality of sections (see Patent Document 2).
In addition, there are sections such as fill-in, and variations such as main A and main B.
Each section of the accompaniment style has pattern data, and is further developed into various specific accompaniment sounds such as a rhythm sound, a chord sound, and a bass sound according to the chord information.
[0004]
The chord information is originally specified for performing automatic accompaniment with the chord progression of the melody.
In some cases, chord information is indicated on a musical score. In order to reflect the user's intention, the code information is input by the user. Alternatively, the music data may be originally included in the music data.
By the way, the chord information may be input during the performance of the automatic accompaniment (chord change). Usually, an accompaniment is obtained from pattern data by the above-described method or the like based on new chord information from the time of a chord change.
In general, conventional pattern data is set to have no chord progression so that no matter what code information is specified. For example, when the code information is (Cmaj), pattern data that repeats “do, s, mi, s” is set.
However, recently, pattern data is sometimes created in consideration of chord progression. Particularly, in the “intro section” and the “ending section”, the melody is not performed at the same time, and therefore, a unique chord progression may be considered.
[0005]
FIG. 6 is an explanatory diagram showing an example of automatic accompaniment data generated by giving chord information to pattern data created in consideration of chord progression. This shows a case where a chord change is mistakenly performed during automatic accompaniment.
In FIG. 6A, the pattern data created by the code information (Cmaj) starts and continues as specified by the designation of the code information (Cmaj), and the code progression of the pattern data is I → IIm → V7 → I. Then, an automatic accompaniment having a flow of (Cmaj) → (Dm) → (G7) → (Cmaj) is output, reflecting the specified chord information (Cmaj).
On the other hand, in FIG. 6B, the original pattern data is the same as that in FIG. 6A, but the code information specified by (Cmaj) is first changed from the third measure to (Fmaj). This shows a case where the code has been changed.
By this chord change, each note of the pattern data is transposed up by four degrees according to the difference between the root (root note) of the original chord information (Cmaj) at the time of pattern data creation and the new chord information (Fmaj). You. In this example, since the chord change is of the same chord type, only transposition based on the root note is performed. As a result, the chord progression in the pattern data becomes (Cmaj) → (Dm) → (C7) → (Fmaj), and the output automatic accompaniment data is transposed during the automatic accompaniment of the section. You will hear it.
If this section is an intro section, if there is a chord change during automatic accompaniment, the intro section will end in a different key from the first. When the automatic accompaniment of the main section is started, the same chord information as the first chord information of the intro section is often specified. Thus, this time it will be transposed four degrees down. As a result, the transposition goes up and down, giving a restless impression, resulting in an unstable hearing.
[0006]
The above-described code change is not limited to a user operation error.
There is also a case where the information written in the score is erroneously input. That is, depending on the musical score, an intro performance musical score for the user to play and its chord information may be described. In the automatic accompaniment apparatus, automatic accompaniment is performed from the assigned intro section irrespective of the intro performance score described in the score. Therefore, when the user inputs a code specified in the score, the assigned intro is performed. You end up with a code specification that is not necessarily related to the section.
Alternatively, in an automatic performance of music data, there is a case where code information is included in a section to which an intro section is added in the music data. Further, there may be cases where different performance data is contained in a different track from the melody performance data. When performing the automatic accompaniment in the accompaniment style, a track containing performance data other than the melody is muted. However, even if this mute operation is performed, the chord information of the music data remains, and a chord specification not necessarily related to the accompaniment data of the intro section automatically created by the automatic accompaniment device will be performed.
[0007]
On the other hand, conventionally, with regard to the ending section, a chord sequencer has been known that does not accept a chord change while the ending section is valid, focusing on the fact that a change in chord progression is not desirable (see Patent Document 3). ).
If this technique is applied, a method is considered in which a code change is not accepted for a section designated by a user.
However, if the pattern data is created in consideration of the chord progression even in a section other than the designated section, it cannot be handled.
Conversely, the pattern data of the designated section may not originally take into account the chord progression, but rather may want to change the accompaniment by designating chord information by the user. In such a case, since the chord change is not accepted, desired accompaniment data cannot be obtained.
[0008]
[Patent Document 1]
JP-A-10-293586
[Patent Document 2]
Patent No. 3327188
[Patent Document 3]
Patent 2536525
[0009]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has an automatic accompaniment apparatus capable of obtaining natural automatic accompaniment data even when second and subsequent chord information is supplied during automatic accompaniment of a section performance. It is intended to provide an automatic accompaniment program.
[0010]
[Means for Solving the Problems]
According to the present invention, according to the first aspect, an accompaniment style section instruction information supply unit that supplies information indicating an accompaniment style and a section of the accompaniment style, a code information supply unit that supplies code information, From a plurality of pattern data, pattern data is determined according to the accompaniment style supplied by the accompaniment style section instruction information supply means and information indicating a section of the accompaniment style, and the determined pattern data is An automatic accompaniment data generating means for generating automatic accompaniment data by reflecting the chord information supplied by the chord information supplying means; and a case where the pattern data determined by the automatic accompaniment data generating means does not take into account the chord progression. The code information supplied from the code information supply means, When the chord progression is taken into account while being reflected in the dynamic accompaniment data generation means, the first chord information supplied from the chord information supply means and effective at the start of the automatic accompaniment of the section is the automatic chord information. A code which is reflected on the accompaniment data generating means, but which does not reflect the second and subsequent chord information specified during the automatic accompaniment of the section supplied from the chord information supplying means on the automatic accompaniment data generating means. It has change control means.
Therefore, even if the chord information of the second and subsequent chords is supplied during the automatic accompaniment of the section, the chord progression is considered in the pattern data determined according to the accompaniment style and the information indicating the section of the accompaniment style. In this case, the chord information is ignored, so that automatic accompaniment data with a natural audibility can be obtained.
Since the above-described ignoring of the chord information is automatically performed, the user does not have to pay attention to the instruction of the accompaniment style and the section and the input of the chord information.
[0011]
According to a second aspect of the present invention, in the automatic accompaniment apparatus according to the first aspect, there is provided a chord change invalidation control information supply unit, and the chord change invalidation control information supply unit is provided with the automatic accompaniment data generation unit. When the pattern data determined in step (1) is one in which chord progression is taken into account, the chord change control means is controlled by the chord information supply means during the second and subsequent sections specified during the automatic accompaniment of the section. The control information for switching whether or not to reflect the chord information on the automatic accompaniment data generation means is supplied to the chord change control means.
Therefore, since the chord change can be made valid, even if the supply of the chord information is erroneous, the correct chord information is immediately supplied, so that the automatic accompaniment data is quickly restored.
In addition, when the chord progression is not considered in the pattern data of the section, the chord change is effective. Therefore, by supplying appropriate chord information by the user, it is possible to obtain a variety of automatic accompaniment data.
[0012]
According to a third aspect of the present invention, the automatic accompaniment apparatus according to the first aspect is realized in the form of a program for causing a computer to execute the automatic accompaniment apparatus. Similarly, the invention described in claim 2 can be realized in the form of a program to be executed by a computer.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a functional configuration diagram for explaining an embodiment of the present invention.
The accompaniment style section instruction information supply unit 1 outputs information designating one of a plurality of types of accompaniment styles. For example, by specifying a category corresponding to a music genre such as 16 beats, country, Latin, swing and jazz, and a specific accompaniment style name under each category, for example, one style file name is specified.
In each accompaniment style, different pattern data is designated for each of a plurality of sections, such as main, intro, and ending.
The accompaniment style / section instruction information supply unit 1 supplies a user-designated one by operating a manipulator when the user plays, or a user-designated one by operating a manipulator when automatically playing music data. Or read out and supply what is specified in the music data.
[0014]
The chord information supply unit 2 is for outputting an auto-accompaniment data reflecting the chord information to an auto-accompaniment data generation unit 4, which will be described later, as in the related art.
In this embodiment, the chord information is output to the automatic accompaniment data generation section 4 through the chord change control section 3. Chord information can be supplied any number of times throughout a song or in each section.
In the code information supply unit 2, a user supplies code information in real time by a code information setting operator, for example.
Alternatively, a storage device prepared and stored in advance as sequence data of code information may be used.
Alternatively, an arbitrary part (usually, a melody part) in the music data is designated, and the apparatus may automatically analyze this part. The code information detected by the automatic analysis is supplied. In this case, in the intro section, the leading code information when the designated part is analyzed is adopted.
[0015]
The chord change control unit 3 determines whether or not a condition to be described later is satisfied, and controls whether or not the chord information supplied from the chord information supply unit 2 is reflected on the automatic accompaniment data generation unit 4.
That is, if the pattern data of each section determined by the automatic accompaniment data generation unit 4 described later in accordance with the information indicating the section of the accompaniment style is not one that takes into account the chord progression, the chord information supply unit 2 The supplied chord information is reflected on the automatic accompaniment data generation unit 4.
On the other hand, when the chord progression is considered, the first chord information supplied from the chord information supply unit 2 and effective at the start of the automatic accompaniment of each section is reflected in the automatic accompaniment data generation unit 4. The second and subsequent chord information specified during the automatic accompaniment of the section is not reflected.
Here, whether or not the pattern data of each section determined by the automatic accompaniment data generation unit 4 considers chord progression is determined for each section of the accompaniment style as described later with reference to FIG. The determination can be made by the included “chord progression presence / absence information” indicating whether or not the chord progression is considered, or by analyzing the pattern data of each section to determine whether or not the chord progression is considered.
[0016]
The first chord information valid at the start of the automatic accompaniment of each section is the same as in the related art, and the following two examples are considered as examples. However, arbitrary conditions can be determined as product specifications.
First is the first code information specified at or before the start of the section. Automatic accompaniment starts from the beginning of the section.
Second, even if no code information is specified until a certain section is started, the code information is the code information when the code information is first specified in the section. In this case, the automatic accompaniment of this section is started from the time when the chord information is first specified.
[0017]
The code change control unit 3 receives supply of code change invalidation control information (flag) from the code change invalidation control information supply unit 6 and controls ON / OFF of the code change invalidation function.
That is, when the pattern data determined by the automatic accompaniment data generation unit 4 takes into account the chord progression, the chord change control unit 3 sends the chord information supplied from the chord information supply unit 2 during the automatic accompaniment of each section. Switches whether or not to reflect the second and subsequent code information specified by.
[0018]
The automatic accompaniment data generator 4 may have the same configuration as that of the conventional one.
For example, referring to the pattern data of each section of a plurality of types of accompaniment style data files stored in the accompaniment style data storage section 5, the accompaniment style supplied from the accompaniment style section instruction information supply section 1 and the The pattern data is determined according to the section instruction information of the accompaniment style, and the determined pattern data reflects the chord information specified via the chord change control unit 3 to generate automatic accompaniment data.
Here, the reflection is to perform automatic accompaniment by converting the above-described pattern data so as to match the chord information, for example, to become a chord constituent sound.
[0019]
With the above configuration, if the chord progression is taken into account in the intro section of the accompaniment style, etc., the first chord information valid at the start of the automatic accompaniment of the section is reflected, but it is specified during the automatic accompaniment of the section Since the second and subsequent chord information is ignored, a natural accompaniment can be obtained.
On the other hand, when the chord change invalidation control information supply unit 6 turns off the chord change invalidation function of the chord change control unit 3, the court change is always reflected, and the automatic accompaniment data generation unit 4 Will output the same automatic accompaniment data.
[0020]
FIG. 2 is an explanatory diagram showing an example of the data structure of the accompaniment style data file.
One certain accompaniment style 11 has a header section and a section section following the header section. The header portion includes data of the accompaniment style name, the time signature of the automatic accompaniment, the tempo of the automatic accompaniment, and the like. As described above, the section section is divided into a plurality of sections corresponding to sections automatically accompanied such as intro, main, and ending.
Each section 12 further includes setting information, pattern data, and part information on the parts making up each section. The setting information includes a section name, the number of measures in the section, and the like.
[0021]
The above-described pattern data is the pattern data of the note data that is the source of the actually generated automatic accompaniment data. It is described in a frequency format based on the tonality of a key, or a note data pattern of a certain key is described in MIDI (Musical Instrument Digital Interface).
The pattern data is converted so as to reflect the chord information specified by the chord change control unit 3 at the start of the section automatic accompaniment.
The pattern data includes one or more parts such as a rhythm part, a bass part, a chord part, a phrase part, and the like. Information on each part is described as part information. The part information includes a part name, an output channel, chord progress information, and other accompaniment data creation information.
As the accompaniment data creation information, for example, when the chord information is reflected on the pattern data, the range of the automatic accompaniment data is specified, and whether the pitch is shifted to a higher or lower direction is specified. I do.
The chord progression presence / absence information indicates whether or not the pattern data of the section 12 is created in consideration of chord progression, as described above. If it is not created in consideration of this, it is set to 0.
[0022]
In the illustrated example, the chord progression presence / absence information is described for each part. However, for example, in the base part and the chord part, the chord information is reflected in the automatic accompaniment data.
In the pattern data in which the chord progress is taken into account, the chord progress is usually taken into consideration for all the parts to which the chord information is reflected.
Therefore, it is not necessary to determine whether or not a section has pattern data in consideration of chord progression according to the chord progression presence / absence information of all parts to which the chord information is reflected. The determination can be made according to the progress information.
[0023]
Alternatively, in consideration of an error in creating an accompaniment style data file, an error in detecting chord progression information, and the like, at least one is 1, for example, based on chord progression information of all parts to which chord information is reflected. Alternatively, the determination may be made based on a criterion such as whether all are 1.
Also, the chord progression presence / absence information may be included not in the part information of each part but in the setting information of each section 12 as common to all parts.
Furthermore, if it is known in advance that a certain section 12 (for example, an intro section) of the accompaniment style to be used has pattern data in consideration of chord progression, this section is included in this section. On the other hand, invalidation control information may be supplied so as to uniformly invalidate a chord change in the middle of a section.
[0024]
FIG. 3 is a hardware configuration diagram for realizing one embodiment of the present invention.
A case will be described in which an electronic musical apparatus such as an electronic musical instrument realizes an automatic accompaniment function by executing a program.
In the figure, 21 is a bus, 22 is a CPU (Central Processing Unit), 23 is a ROM (Read Only Memory), and 24 is a RAM (Random Access Memory). A working area for the CPU 22 is provided in the RAM 24, and various preset data such as accompaniment style data are stored in the ROM 23 in addition to a control program for operating the CPU 22.
Reference numeral 25 denotes an input operation unit, which is various operators including a keyboard. There are operators for setting the accompaniment style shown in FIG. 1, operators for specifying chord information, and operators for turning on / off the chord change invalidation function.
[0025]
These controls are not limited to physical switching buttons and switches.
For example, a set accompaniment style and a list of sections used are presented on the display 27, and for each section, the user can turn on / off a chord change invalidation function by operating a cursor key or an enter key. May be. Further, the various settings described above may be made by switching the menu screen.
In addition, there are controls for controlling the start or end of the automatic accompaniment, controls for recording and reproduction of music data, and setting controls for setting sound source parameters.
The accompaniment style data file and the music data are stored in the ROM 23 or the external storage device 30 and loaded into the RAM 24.
[0026]
A display circuit 26 outputs image data to a display 27 such as a liquid crystal display. The display 27 displays a menu screen for setting automatic accompaniment, displays a setting menu for sound source parameters, and displays a score of a music piece to be played.
28 is a sound source circuit and 29 is a sound system. The tone generator circuit 28 inputs tone generator control parameters and the like according to the performance data and the automatic accompaniment data, synthesizes a performance sound into a waveform, and the tone signal is supplied to a sound system 29 and output from a speaker. The tone generator circuit 28 is configured by dedicated hardware, a DSP (Digital Signal Processor) and a microprogram. Alternatively, the sound source function may be realized by a software sound source program that causes the CPU 32 to perform waveform synthesis.
[0027]
Reference numeral 30 denotes an external storage device such as a flash memory (semiconductor memory card) and an FDD (Flexible Disk Drive). A drive for a recording medium such as an HDD (hard disk drive), a CD-ROM (compact disk read only memory), an MO (Magneto Optical Disk), and a DVD (Digital Versatile Disk) may be used. The accompaniment style data file may be supplied to an external storage medium such as FDD and read into the RAM 24. The control program may be installed on a hard disk and read into the RAM 24.
A communication interface 31 connects an external device 32 such as a tone generator, a MIDI keyboard, or the like to the bus 21. Not only a dedicated MIDI interface, but also a direct connection or a LAN (Local Area Network) connection using a general-purpose interface, or a connection to an external device 32 such as a personal computer or a server via the Internet.
The accompaniment style data file and the music data file are downloaded from the external device 32 to the external storage device 30 or the RAM 24, and the music data may be supplied to the RAM 24 in a real-time or streaming reproduction method for use.
[0028]
The accompaniment style data storage unit 5 in FIG. 1 corresponds to the RAM 24, and receives a plurality of types of accompaniment style data files (FIG. 2) from the ROM 23, an external storage medium in the external storage device 30, or the external device 32. Is done. However, in the RAM 24, only the data of the accompaniment style 11 or the data of each section 12 determined according to the accompaniment style and the section instruction information of the accompaniment style are read from the ROM 23, the external storage medium or the external device 32 each time they are determined. It may be input. In this case, the accompaniment style data storage unit 5 in FIG. 1 corresponds to the ROM 23, the external storage medium, the external device 32, or the like.
[0029]
The CPU 22 performs various controls such as loading an electronic music device control program including an automatic accompaniment program stored in the ROM 23 into the RAM 24 and generating automatic accompaniment data.
The generated automatic accompaniment data for each part is output to the tone generator circuit 28 as tone control parameters, such as tone color of musical tones, and note-on and note-off data.
Further, it generates music score image data according to the music data or music score display data, and outputs it to the display circuit 26.
The same automatic accompaniment function can be realized in a personal computer. An operation unit such as a keyboard and a mouse is used as the input operation unit 25, and a MIDI keyboard as an external device 32 connected via the communication interface 31 can be used as a keyboard and the like.
[0030]
FIG. 4 is an explanatory diagram showing an example of the accompaniment style section and chord sequence data.
It consists of an intro section and a main section. The automatic accompaniment data generated by the intro section event and the first two chord events correspond to the specific example shown in FIG.
In the figure, the time (time) is indicated by a bar, a beat, and a clock, and only the accompaniment style section event and the chord event at each time are shown.
[0031]
At the first beat of the first bar, a chord event [Chord (Cmaj)] specifying (Cmaj) and a section event [StyleA / Section (Intro) 4Measure] specifying the intro section of style A with a bar width of 4 are generated. are doing. Therefore, the intro section is valid from the first bar to the end of the fourth bar.
At the first beat of the third bar, there is a chord event [Chord (Fmaj)] specifying (Fmaj). This code event occurs at a timing in the middle of the intro section.
At the first beat of the fifth bar, a chord event [Chord (Cmaj)] specifying (Cmaj) and a section event [StyleA / Section (Main) 12Measure] specifying the main section of style A with a bar width 12 occur. are doing. Therefore, the main section is valid from the fifth bar to the end of the sixteenth bar.
In the related art, pattern data is transposed and output during automatic accompaniment of an intro section by a chord event [Chord (Fmaj)] generated on the first beat of the third bar.
In this embodiment, if the intro section is a section considering the chord progression, the chord designation (Fmaj) generated at the first beat of the third measure generated within the section of the intro section is invalidated, and FIG. Instead of b), the accompaniment data of “Cmaj → Dm → G7 → Cmaj” as shown in FIG. 6A is generated.
[0032]
FIG. 5 is a flowchart for explaining an operation example of the embodiment of the present invention shown in FIG.
This is performed by the CPU 22 shown in FIG. 3 executing an automatic accompaniment program. FIG. 5 shows an accompaniment style (section) and a chord event suitable for input in the format shown in FIG.
In the figure, “Chord” and “Section” are event buffers indicating the code event and the section event at that time.
“CFlag” is a flag for controlling code change invalidation, and turns ON / OFF a function of invalidating a code change under predetermined conditions.
[0033]
First, an outline of the operation will be described.
When a code event is detected in S45, the processing of S52 to S59 is performed, and when a section event is detected in S46, the processing of S47 to S50 is performed. In S51, an automatic accompaniment playback process is performed based on "Chord" and "Section" at that time.
The on / off state of the chord change invalidating function is determined in S56, and the chord progression presence / absence information of the pattern data of each section of the accompaniment style is determined in S58.
In S53, the code event is written to “Chord”, while in S47, the section event is written to “Section”, so that the processing proceeds from S49 → S50 → S51, and “Chord” and “Section” are processed. Automatic accompaniment processing is performed based on the content. (First, the code event written to “Chord” in S53 is treated as the first valid code event in this section written to “Section” in S47).
In S55, when a code event after the end time of the current section is detected, the process proceeds from S57 to S43 (the code event written to “Chord” in S53 is first changed to “Section” in S47). When the next section event is detected (S44 → S45 → S46), the processing proceeds from S47 → S49 → S50 → S51, and at that time, “Chord” is detected. Automatic accompaniment processing is performed based on the contents of "" and "Section."
[0034]
Unlike the specific example shown in FIG. 4, when a code event is supplied for the first time after the intro section event has occurred, S44 → S45 → S46 → S47 → S49 → S43 → S44 → S45 → S52 (code counter Value = 1) → S53 → S54 → S55 → S56 (Example: when the chord change invalidation is instructed) → S58 (Example: When the chord progression information is 1) → S59 → S51 As a result, the automatic accompaniment playback processing of the intro section is started at the time when the chord event is supplied (the chord event written in S53 is replaced with the first chord valid in this section previously written in S47). Event, but only in the first section).
[0035]
Next, description will be made in order with reference to the specific example shown in FIG.
In S41, user settings are made, and in S42, counters, buffers, and the like are initialized.
One of the events supplied in S43 is read, and if there is any event in S44, the process proceeds to S45. While the event occurs, the processing is continued. However, when there is no event even after a lapse of a predetermined time due to the end of the sequence data, the stop of the user performance, or the like, the reproduction is ended.
In S45, it is determined whether or not the event is a code event. In S46, it is determined whether or not the event is a section event. If neither is, the process proceeds to S48, a process of reproducing other events is performed, and a process is performed in S43. Back.
In the specific example of FIG. 4, the code event [Chord (Cmaj)] is detected in the first bar, so the process proceeds to S52, the value of the code counter is set to 1, and in S53, [ Chord (Cmaj)].
In S54, it is determined whether or not the section event held in [Section] is in the initial state (section instruction information is not held). If the section event is in the initial state, the process returns to S43. The process proceeds to S55.
In the specific example shown in FIG. 4, the process returns to S43.
[0036]
Next, when proceeding from S43 to S45, a section event [Style A / Section (Intro)] of the first bar is detected, and in S47, this section event is supplied to "Section". If "Chord" is in the initial state (no code information is input) in S49, the process returns to S43.
However, since [Chord (Cmaj)] is already held in the "Chord" buffer in S53, the process proceeds to S50, and the value of the code counter is set to 1.
In S51, based on the pattern data corresponding to [StyleA · Section (Intro)] held in “Section”, automatic accompaniment data reflecting [Chord (Cmaj)] held in the “Chord” buffer is created. The process for reproduction is started, and the process returns to S43. The automatic accompaniment playback processing ends when the end time of each section comes.
[0037]
Next, when the process proceeds from S43 to S45, a chord event [Chord (Fmaj)] is detected in the third measure of FIG. In S52, the value of the code counter becomes 2, and in S53, [Chord (Fmaj)] is held in the "Chord" buffer. In S54, since “Section” is [Style A · Section (Intro)], the process proceeds to S55.
In S55, it is determined whether or not the code event time held in “Chord” is earlier than the end time of the section event held in the “Section” buffer, that is, whether or not the code information is supplied in the section of the section. judge.
The time (3: 1: 000) of the chord event held in “Chord” is the end time (5: 1: 000) of the section event held in “Section” (4 measures in the first measure of the start time). Before the addition, that is, since this code information is supplied within the section of the intro section, the process proceeds to S56.
In S56, it is determined whether or not a flag “CFlag” for controlling a code change invalidating function is ON. If it is OFF, the process proceeds to S51, and the automatic accompaniment data in which [Chord (Fmaj)] held in "Chord" is reflected in the pattern data of [Style A / Section (Intro)] held in "Section" Generate
[0038]
On the other hand, if the flag "CFlag" for controlling the code change invalidation function is ON, the process proceeds to S58, and determines whether or not the chord progression presence / absence information is 1, that is, [StyleA] held in "Section". It is determined whether or not the pattern data of [Section (Intro)] is created in consideration of chord progression.
If the chord progress information is 1, the process proceeds to S59, and it is determined whether or not the value of the chord counter is 1. If it is 1, the process proceeds to S51, but if it is not 1, the process returns to S43.
In the specific example of FIG. 4, since the current value of the code counter is 2, the process returns to S43. As a result, the chord event [Chord (Fmaj)] supplied during the automatic accompaniment of the section and held in “Chord” is not reflected in the automatic accompaniment playback processing in S51, so that the chord change invalidating function is executed.
[0039]
Next, the process proceeds from S43 to S45, and when a code event [Chord (Cmaj)] is detected at the fifth measure in FIG. 4, the value of the code counter is set to 3 in S52, and the value of ( Cmaj) is supplied, and the section proceeds to S55 since the section is not in the initial state in S54.
In S55, is the time (5: 1: 000) of the code event held in “Chord” earlier than the end time (5: 1: 000) of the effective period of the section event held in “Section”? Determine whether or not.
In the specific example of FIG. 4, since the times are the same, a code event has been supplied outside the valid section of the intro section. Therefore, it is determined that the current section is not a valid section, and the process proceeds to S57 and proceeds to “Section”. Is initialized, and the process returns to S43.
[0040]
Next, the process proceeds from S43 to S44, and when a section event [StyleA · Section (Main)] is detected at the fifth measure in FIG. 4, the process proceeds from S46 to S47, and [StyleA · Section (Main) is stored in the “Section” buffer. Main)], and in S49, since the “Chord” buffer is not in the initial state, the value of the code counter is set to 1 in S50, and the process proceeds to S51.
In S51, the automatic accompaniment reflecting the code event [Chord (Cmaj)] previously held in "Chord" in S53 in the pattern data of [Style A / Section (Main)] held in "Section". Generate data.
When the end time of the last section (the main section in the specific example shown in FIG. 4) comes, all the processing ends.
Although not shown in the specific example of FIG. 4, even when chord information is input during the automatic accompaniment of the main section, the flag "CFlag" for controlling the chord change invalidation function is ON in S56, and in S58 If the code progress information is 1, this code designation is invalidated.
[0041]
Therefore, when the chord change invalidation function is enabled, if the chord progression is considered in each section of the accompaniment style, the first chord information valid at the start of the automatic accompaniment of the section is reflected. However, the second and subsequent chord information specified during the automatic accompaniment is automatically ignored.
Since the chord change can be made valid, for example, when the first chord information in the section is changed to (Cmaj) and (Fmaj) is set and the accompaniment sound is heard and the user notices a mistake, the user By immediately turning off the chord change invalidation function and supplying correct chord information (Cmaj), the automatic accompaniment data can be restored.
In addition, when pattern data that does not consider the chord progression continues for a long time, the user can supply appropriate chord information one or more times to give the chord progression and obtain varied automatic accompaniment data. .
[0042]
In the above description, an example in which the present invention is applied to a dedicated electronic music device has been described. Here, the electronic music device is not limited to keyboard musical instruments such as electronic musical instruments and automatic performance pianos. It is not restricted to musical instrument forms such as electronic wind instruments and electronic string instruments.
Further, the present invention can be applied to a personal computer having a hardware sound source or a software sound source program installed, or a personal computer to which a device having a sound source function is externally connected.
The present invention can also be applied to a communication terminal such as a game machine or a mobile phone terminal, a PDA (Personal Digital Assistant), a home electric appliance, or the like, which has an automatic accompaniment function. The automatic accompaniment function can be realized by causing a built-in CPU to execute a control program. The automatic accompaniment device is not limited to one built in one main body, but each device is a separate device, and each device is connected using various networks, so that an integrated automatic accompaniment device can be obtained as a whole. Good.
[0043]
【The invention's effect】
As is clear from the above description, the present invention ignores the second and subsequent chord information specified during automatic accompaniment of a section when the pattern data of the accompaniment style section takes into account the chord progression. Therefore, there is an effect that natural automatic accompaniment data can be obtained.
[Brief description of the drawings]
FIG. 1 is a functional configuration diagram for explaining an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing an example of a data structure of an accompaniment style data file.
FIG. 3 is a hardware configuration diagram that realizes an embodiment of the present invention.
FIG. 4 is an explanatory diagram showing an example of sequence data of accompaniment styles and chords.
FIG. 5 is a flowchart for explaining an operation example of the embodiment of the present invention shown in FIG. 1;
FIG. 6 is an explanatory diagram showing an example of automatic accompaniment data generated from pattern data created in consideration of chord progression.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Accompaniment style section instruction | indication information supply part, 2 ... chord information supply part, 3 ... chord change control part, 4 ... automatic accompaniment data generation part, 5 ... accompaniment style data storage part, 6 ... chord change invalidation control information supply Department

Claims (3)

An accompaniment style section instruction information supplying means for supplying information indicating an accompaniment style and a section of the accompaniment style;
Code information supply means for supplying code information;
From a plurality of pattern data, pattern data is determined according to the accompaniment style supplied by the accompaniment style section instruction information supply means and information indicating a section of the accompaniment style, and the determined pattern data is Automatic accompaniment data generation means for generating automatic accompaniment data by reflecting the chord information supplied by the chord information supply means,
When the pattern data determined by the automatic accompaniment data generation means does not take into account the chord progression, the code information supplied from the chord information supply means is reflected on the automatic accompaniment data generation means, and When the progress is considered, the first chord information supplied from the chord information supply means and effective at the start of the automatic accompaniment of the section is reflected on the automatic accompaniment data generation means. Chord change control means for preventing the second and subsequent chord information specified during the automatic accompaniment of the section supplied from the supply means from being reflected in the automatic accompaniment data generating means;
An automatic accompaniment device comprising: Code change invalidation control information supply means,
The chord change invalidation control information supply means, when the pattern data determined by the automatic accompaniment data generation means is one that takes into account chord progression, the chord change control means, from the chord information supply means Supplying to the chord change control means control information for switching whether or not to reflect the second and subsequent chord information specified during the supplied automatic accompaniment of the section in the automatic accompaniment data generating means;
The automatic accompaniment device according to claim 1, wherein: Providing an accompaniment style and an accompaniment style section instruction information supplying step of supplying information indicating a section of the accompaniment style;
A code information supply step of supplying code information;
From a plurality of pattern data, pattern data is determined in accordance with the accompaniment style supplied in the accompaniment style section instruction information supplying step and information indicating a section of the accompaniment style, and the determined pattern data is An automatic accompaniment data generating step of generating automatic accompaniment data by reflecting the chord information supplied by the chord information supplying step;
When the pattern data determined in the automatic accompaniment data generation step does not take into account the chord progression, the code information supplied from the chord information supply step is reflected in the automatic accompaniment data generation step, and When the progress is considered, the first chord information supplied from the chord information supply step and effective at the start of the automatic accompaniment of the section is reflected in the automatic accompaniment data generation step. A chord change control step of preventing second and subsequent chord information specified during the automatic accompaniment of the section supplied from the supply step from being reflected in the automatic accompaniment data generation step;
An automatic accompaniment program characterized by causing a computer to execute the following.

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