JP4129794B2 - Program for realizing automatic accompaniment generation apparatus and automatic accompaniment generation method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic accompaniment generating apparatus and an automatic accompaniment generating method for generating an automatic accompaniment based on an accompaniment pattern created in advance.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an automatic accompaniment generating apparatus that generates an automatic accompaniment based on a previously created accompaniment pattern has been known.
[0003]
One such automatic accompaniment generator is called an arpeggiator. The arpeggiator generates arpeggios (distributed chords) according to the player's key press. For example, the arpeggiator is based on a plurality of key numbers (simple numbers instead of note numbers corresponding to pitches) and their sounding timings. When a plurality of keys are pressed simultaneously, each note number corresponding to each key is numbered according to a predetermined rule (for example, in order of low pitch). The note number corresponding to the assigned number is pronounced at the sounding timing of the key number in the arpeggio pattern that matches the assigned number, and the arpeggio is played based on the key-press sound. Configured to generate. Also, a fixed mode switch is provided, and when this switch is on, a fixed note number is input according to the key pressed, and the arpeggio is based on the fixed note number in the same manner as described above. There is also an arpeggiator configured to generate (see, for example, Patent Document 1).
[0004]
On the other hand, a variety of accompaniment patterns according to various styles (genres, etc.) are stored, and an automatic accompaniment is performed based on the accompaniment pattern selected by the performer, in accordance with the input chord detected from the keyboard etc. There is also a device. The accompaniment pattern is a set of pitch data and timing data corresponding to each accompaniment sound, and is prepared as a source pattern based on a predetermined chord such as a C measure. The pitch of the pitch data in the source pattern is converted according to the type of the input chord, and the pitch of the converted pitch data is shifted according to the pitch of the root of the input chord. An accompaniment sound having a pitch suitable for a chord is generated (for example, see Patent Document 2).
[0005]
[Patent Document 1]
JP 2001-22354 A
[Patent Document 2]
Japanese Patent No. 3319390
[0006]
[Problems to be solved by the invention]
However, among the conventional automatic accompaniment generators that generate an arpeggio based on the key-press sound, only the pitch of the key pressed by the player is produced, so the player It is necessary to perform a key pressing operation in consideration that the accompaniment sound according to the image is generated, and it is difficult for a beginner to generate an automatic accompaniment.
[0007]
Of the conventional automatic accompaniment generators described above, those that generate arpeggios based on fixed sounds rather than key-press sounds, and even for beginners, the key press operation for generating automatic accompaniments is simple. However, since the player's key press sound is not considered, the player himself cannot change the automatic accompaniment sound.
[0008]
Furthermore, in the conventional automatic accompaniment generator described above, in which automatic accompaniment is performed in accordance with the input chord detected from the keyboard or the like based on the accompaniment pattern selected by the performer, the generated automatic accompaniment sound The high is determined not only by the pitch of the key pressed by the performer, but also by the chord detected from the key pressed state, so that the performer himself can change the automatic accompaniment sound, It is necessary to perform a key pressing operation so that a chord is established (or an intended chord is detected), and it is difficult for a beginner to generate a key accompaniment.
[0009]
The present invention has been made paying attention to this point, and even if a performer is a beginner, an automatic accompaniment capable of generating a stable and varied automatic accompaniment with a simple key press. It is an object of the present invention to provide a program for realizing a generation device and an automatic accompaniment generation method.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, an automatic accompaniment generator according to claim 1 is accompaniment pattern data composed of a plurality of event data created in advance with a predetermined pitch name as a first reference sound, The event data includes accompaniment pattern storage means for storing information including pitch information and pronunciation timing information, input means for inputting at least one pitch information, and when one pitch information is input by the input means. Determining means for determining any one of the pitch information as the second reference sound when a plurality of pitch information is input; The pitch name of each pitch information that can be included in each event data in the accompaniment pattern data can be input by the first pitch which is the pitch from the pitch name of the first reference tone and the input means. Each pitch information that can be included in each event data for each second pitch, which is a pitch from the pitch name of the second reference tone determined by the determining means, of the pitch name of each pitch information A conversion map storage means for storing a conversion map indicating how to convert the first pitch for each pitch information included in each event data in the accompaniment pattern data, and input by the input means The second pitch is calculated for each piece of pitch information, and is recorded in the calculated first pitch, the calculated second pitch, and the pitch conversion map storage means. Transform map Each pitch information included in each event data in the accompaniment pattern data is converted based on The pitch information after the conversion is shifted based on the second reference sound. Conversion means to perform, and by the conversion means Obtained And sounding means for sounding each event data including each pitch information at the sounding timing indicated by the sounding timing information.
[0013]
Claims 2 The program described in (1) can be realized by the same technical idea as in the first aspect.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
FIG. 1 is a block diagram showing a schematic configuration of an automatic accompaniment generator according to an embodiment of the present invention.
[0016]
As shown in the figure, the automatic accompaniment generating apparatus of the present embodiment includes a manipulator group 1 including a character input keyboard, a pointing device such as a mouse, and a plurality of operators such as various switches, and the manipulator group 1 A detection circuit 2 that detects the operation state of each of the control elements, a CPU 3 that controls the entire apparatus, a ROM 4 that stores a control program executed by the CPU 3, various table data, and the like, music data, various input information, and operations A RAM 5 that temporarily stores results, an external storage device 6 that stores various application programs including the control program, various music data, various data, and the like, and displays various information such as a liquid crystal display (LCD) and Display device 7 equipped with a light emitting diode (LED), external MIDI (Musical Instrument Digital Interface) device, etc. A communication interface (I / F) 8 that connects the external control device 100 and transmits / receives data to / from the external control device 100, a sound source circuit 9 that converts the stored music data and the like into a musical sound signal, and the sound source circuit 9. An effect circuit 10 for applying various effects to the musical sound signal from 9, and a musical sound signal from the effect circuit 10 for converting to a sound, such as a DAC (Digital-to-Analog Converter), an amplifier, a speaker, etc. The system 11 is comprised.
[0017]
The above components 2 to 10 are connected to each other via the bus 12, the external control device 100 is connected to the communication I / F 8, the effect circuit 10 is connected to the sound source circuit 9, and the sound is supplied to the effect circuit 10. A system 11 is connected.
[0018]
Examples of the external storage device 6 include a flexible disk drive (FDD), a hard disk drive (HDD), a CD-ROM drive, and a magneto-optical disk (MO) drive. As described above, the external storage device 6 can also store a control program to be executed by the CPU 3. If the control program is not stored in the ROM 4, the control program is stored in the external storage device 6. By reading it into the RAM 5, it is possible to cause the CPU 3 to perform the same operation as when the control program is stored in the ROM 4. In this way, control programs can be easily added and upgraded.
[0019]
In the illustrated example, the external control device 100 is directly connected to the communication I / F 8. However, the communication I / F 8 is not limited to this, and for example, a server computer via a communication network such as a LAN (Local Area Network), the Internet, or a telephone line. May be connected. In this case, if the above programs and various parameters are not stored in the external storage device 6, the communication I / F 8 is used for downloading the programs and parameters from the server computer. A computer serving as a client (in this embodiment, an automatic accompaniment generation apparatus) transmits a command requesting download of a program and parameters to the server computer via the communication I / F 8 and the communication network. The server computer receives this command and distributes the requested program or parameter to the computer via the communication network. The computer receives the program or parameter via the communication I / F 8 and receives the external storage device 6. Downloading is completed by accumulating in.
[0020]
As the external control device 100, it is assumed that a MIDI keyboard device is connected in the present embodiment. When a performer presses a key, the MIDI keyboard device generates and outputs MIDI event data corresponding to the key pressing sound. The communication I / F 8 receives this output, that is, MIDI event data, and stores it in a MIDI event area secured at a predetermined position in the RAM 5.
[0021]
Note that the automatic accompaniment generator according to the present embodiment is constructed on a general-purpose personal computer, as can be seen from the above configuration, but is not limited to this, and only the minimum elements that can implement the present invention are included. You may build on the exclusive apparatus comprised from these.
[0022]
FIG. 2 is a diagram showing an example of one accompaniment pattern data read from the external storage device 6 and stored in a predetermined area of the RAM 5.
[0023]
As shown in the figure, the accompaniment pattern data is composed of header information, a pattern reference pitch name, and a pattern data list. The header information is for describing bibliographic items of the accompaniment pattern data. As the header information, for example, an accompaniment pattern name, a reference time signature, a data length of the accompaniment pattern data, and the like are described. . The reference pitch name of a pattern is a pitch name that is used as a reference when creating the accompaniment pattern data. In the illustrated example, “C (do)” is used as a reference. Note that the reference sound is not limited to a note name, and may be a note number. The pattern data list is a list in which a plurality of data serving as a basis for generating the accompaniment pattern is described. The sound generation timing (Timing), sound generation duration (Gate), sound generation pitch (Note), and velocity (Vel) ) Is composed of a plurality of event data. In the illustrated example, one beat is set to 480 clocks, but it is not limited to this. A number in parentheses beside the pronunciation pitch (for example, (60) for “C3”) represents a note number. Note that the pitches in the pattern data list may be expressed by pitch names, and the actual tone pitch, that is, the pitch including the octave, may be determined based on the player's key press sound.
[0024]
The number of accompaniment pattern data is created in advance according to the various accompaniment patterns and stored in the external storage device 6. When the performer selects one of the accompaniment pattern data, the selected accompaniment pattern data is read out and stored in the RAM 5. Stored in a predetermined area.
[0025]
FIG. 3 is a diagram showing an example of a pitch conversion map for converting each tone pitch in the pattern data list of the selected accompaniment pattern data in accordance with the key-press sound of the performer. Is stored in a predetermined area of the ROM 4, for example.
[0026]
In the figure, “semitone distance from pattern reference pitch name” means the pitch (distance) from the reference pitch name of the accompaniment pattern data to the pitch name of the sound to be converted in the pattern data list in semitone units. It is represented by. “The pitch name when the pattern reference pitch name is C” represents the pitch name of the sound to be converted in the pattern data list when the reference pitch name of the accompaniment pattern data is “C”. Is. The “semitone distance from the pattern reference pitch name” and the “pitch name when the pattern reference pitch name is C” mean the same thing except for the expression method. In the present embodiment, “semitone distance from pattern reference pitch name” is used, and “pitch name when pattern reference pitch name is C” is not used. For this reason, “the pitch name when the pattern reference pitch name is C” is expressed in parentheses.
[0027]
Furthermore, the “semitone distance from the reference note name during the key-pressing sound” refers to the pitch name of the reference sound during the key-press sound (for example, the lowest pitch when there are multiple key-press sounds) The pitch (distance) to the pitch name of the target sound during the key pressing sound is expressed in semitone units.
[0028]
And the data which comprises a map have shown the fluctuation amount (movement amount) which moves the pitch of the sound of conversion object. Note that a method of changing the pitch of the sound to be converted using this pitch conversion map will be described later.
[0029]
The control process executed by the automatic accompaniment generator configured as described above will first be described in outline, and then described in detail with reference to FIGS.
[0030]
The automatic accompaniment generating apparatus according to the present embodiment first selects each pitch included in each event data of the accompaniment pattern data (the pattern data list) selected by the performer. Change (move) based on the key-pressing sound and the pitch conversion map (some events do not change the pitch), and then (2) change each pitch to the accompaniment pattern data The automatic accompaniment is generated by changing (moving) based on the reference sound and the reference sound in the key-pressing sound, and then outputting the sound at the corresponding sounding timing.
[0031]
A feature of the present invention resides in that the player's key press sound is used to change each pitch included in each event data of accompaniment pattern data. As a result, the player's key-pressing sound is not pronounced as it is, and the key-pressing operation does not have to be performed according to any rule (for example, a rule that the key-pressing sound constitutes a chord). However, even for beginners, it is possible to generate a stable accompaniment with a simple key press operation, and the accompaniment pattern changes based on the key press sound of the performer, so that a variety of accompaniment can be generated. .
[0032]
Next, this control process will be described in detail.
[0033]
FIG. 4 is a flowchart showing a procedure of accompaniment data generation processing executed by the automatic accompaniment generation apparatus of the present embodiment, particularly the CPU 3, and FIGS. 5 and 6 create a data list (DataList) in step S11 of FIG. It is a flowchart which shows the detailed procedure of a processing subroutine.
[0034]
The accompaniment data generation process mainly includes
(A) Initialization process
(B) Key-pressed state detection process
(C) Key-on list creation process
(D) Data list creation process
(E) Accompaniment sound generation processing
It is comprised by each process.
[0035]
Hereinafter, the processes (a) to (e) will be described in order.
[0036]
For example, when the performer operates a predetermined operator of the operator group 1 and the accompaniment data generation mode is selected, the accompaniment data generation process is started. First, the process is the initialization process (a) described above. Migrate to In this (a) initialization process, initial settings such as timbre setting, accompaniment pattern data selection setting, and tempo setting are performed (step S1 in FIG. 4), and the area KeyOnList and area DataList secured at predetermined positions in the RAM 5 are set. Is initialized (step S2). Here, the area KeyOnList is an area for storing event data (mainly note numbers) input according to the player's key press, and the area DataList is the pattern data of the accompaniment pattern data set and set. This is an area for storing all event data (mainly note numbers) included in the list. When the area KeyOnList and the area DataList are initialized, the areas related to the areas KeyOnList and DataList are also initialized in the same manner. The region related to the region KeyOnList is the region BNk, Nk (x), Dk (Nk (x)), etc. in FIG. 7A, and the region related to the region DataList is the region in FIG. 7B. BNd, Nd (y), Dd (Nd (y)), S, etc. The contents of data stored in each area will be described later.
[0037]
Next, the processing shifts to the key depression state detection processing (b). In this (b) key pressing state detection process, for example, the key pressing state is detected by reading the data in the MIDI event area (step S3), and the read data and the data in the area KeyOnList are obtained. By comparing, it is detected whether or not the key pressing state has changed (step S4). At this time, if there is a change in the key depression state, it is determined whether or not the area DataList is in the initial state, that is, whether or not the area DataList has changed from the no key depression state to the key depression state (step S5). When it is not in a state, that is, when a key-pressed state is changed to another key-pressed state, automatic accompaniment processing performed in the key-pressed state before the change (specifically, processing performed in step S12 described later) (Step S6), the area KeyOnList and the area DataList (and the areas related to both areas KeyOnList and DataList) are initialized (Step S7). On the other hand, when the area DataList is in the initial state, that is, when the state is changed from the no key pressed state to the key pressed state, the area KeyOnList and the area DataList (and the areas related to both areas KeyOnList and DataList) are immediately initialized. (Step S7).
[0038]
Next, the processing shifts to the key-on list creation processing (c). In this (c) key-on list creation process, first, the MIDI event data stored in the MIDI event area is read, and the pitch (in this case, the pitch is a pitch name including octave information (for example, “ C3 ″ etc.), but not limited to this, note numbers may be adopted) and extracted in the region KeyOnList. Note that although the octaves are different, pitches having the same pitch name need not be stored in the region KeyOnList. This is because the accompaniment data generation process is configured to perform various processes based on the pitch names. Next, a reference sound is determined from at least one pitch (keypress sound) stored in the area KeyOnList (step S9). Here, as a method for determining the reference sound, in this embodiment, a method in which the lowest pitch is used as the reference sound is adopted, but according to some rule, any one pitch is determined as the reference sound. If possible, any determination method may be adopted. Next, for each pitch stored in the area KeyOnList, the pitch name Nk (x) (where x is an integer equal to or greater than 1 and takes values up to the number of pitches stored in the area KeyOnList. ), A semitone distance Dk (Nk (x)) with respect to the pitch name BNk of the reference sound is calculated and stored in a region Dk (Nk (x)) secured at a predetermined position in the RAM 5 (step S10). In step S10, only the semitone distance Dk (Nk (x)) necessary for the subsequent processing is stored, but data necessary for calculating the semitone distance Dk (Nk (x)), that is, It is also preferable to store the pitch name BNk of the reference sound and the pitch names Nk (x) of the pitches stored in the area KeyOnList. Therefore, in the example of FIG. 7A, in addition to the region KeyOnList and the region Dk (Nk (x)), as the related region, the region BNk for storing the pitch name BNk of the reference sound and the region KeyOnList are stored on the RAM 5. An area Nk (x) for storing each pitch name Nk (x) of each pitch stored in is provided.
[0039]
Next, the processing shifts to the data list creation processing (d). In this (d) data list creation process, the target accompaniment pattern data is converted by converting each pitch contained in each event data in the pattern data list of the selected accompaniment pattern data by the method described below. It is trying to generate. Note that (d) the data list creation process is easier to understand if it is described using a specific example, and will be described according to the example of FIG.
[0040]
7B uses the calculated semitone distance Dk (Nk (x)), the pitches (Note) in the pattern data list of FIG. 2, and the pitch conversion map of FIG. It is a figure which shows a result when the process of step S21-S32 is performed in the flowchart of FIG.
[0041]
7B, first, the reference pitch name “C” of the pattern is read from the accompaniment pattern data of FIG. 2 and stored in a region BNd secured at a predetermined position in the RAM 5 (step S21). The pitches “C3”, “E3”, “G3” and “C4” of each event data in the pattern data list are read out and stored in an area DataList (initial DataList) secured at a predetermined position of the RAM 5 (step S22).
[0042]
Next, each pitch Nd (y) from each pitch stored in the area DataList (where y is an integer equal to or greater than 1 and takes values up to the number of pitches stored in the area DataList) ) Is stored in the region Nd (y) in association with the pitch, and the semitone distance Dd (Nd (y)) of each pitch name Nd (y) with respect to the reference pitch name BNd (= C) is obtained. The calculated value is stored in a region Dd (Nd (y)) secured at a predetermined position in the RAM 5 (step S23).
[0043]
Then, for all pitches stored in the area DataList, the pitch shift amount S for moving the pitch is determined for each pitch, and the pitch is moved by the determined pitch shift amount S. And stored in a corresponding position in a region (adjustment DataList) different from the region DataList. Note that the pitch after movement may be overwritten at the corresponding position in the area DataList. Hereinafter, a method for determining the pitch movement amount S will be described.
[0044]
First, for the pitch “C3” stored at the beginning of the region DataList (initial DataList), the semitone distance Dd (Nd (1)) corresponding to the pitch “C3” is “0”, and the region KeyOnList Since the semitone distances Dk (Nk (1)) and Dk (Nk (2)) corresponding to the stored pitches “C3” and “E ♭ 3” are “0” and “3”, respectively. First, the value (= 0) in the “0” row of the “0” column is read out from the pitch conversion map of FIG. 3, and the pitch shift amount S (at this time, the region S is reset (0)). (S = 0), and then the value (= 0) in the “3” row of the “0” column is read and added to the pitch movement amount S (S = 0 + 0). The pitch “C3” is adjusted by the pitch shift amount S thus obtained (steps S25 to S29 → S26 to S30). In this case, since the final value of the pitch movement amount S is “0”, the pitch “C3” does not vary.
[0045]
Next, in the area DataList (initial DataList) Second , The semitone distance Dd (Nd (2)) corresponding to the pitch “E3” is “4”, and each pitch “C3” stored in the region KeyOnList and Since each semitone distance Dk (Nk (1)) and Dk (Nk (2)) corresponding to “E ♭ 3” is “0” and “3”, respectively, from the pitch conversion map of FIG. Then, the value (= 0) in the “0” row of the “4” column is read and added to the pitch movement amount S (at this time, the region S is reset (0)) (S = 0). Next, the value (= −1) in the “3” row of the “4” column is read and added to the pitch movement amount S (S = 0 + (− 1)). The pitch “E3” is adjusted with the pitch shift amount S thus obtained (steps S31 → S32 → S25 to S29 → S26 to S30). In this case, since the final value of the pitch movement amount S is “−1”, the pitch “E3” changes to “E に 3”.
[0046]
After performing such processing for all the pitches stored in the area DataList (initial DataList), each pitch stored in the adjustment DataList is shifted in accordance with the reference tone of the key pressing tone (step S32). → S33).
[0047]
Finally, the processing shifts to the accompaniment sound generation processing of (e). In this (e) accompaniment sound generation process, the corresponding event data in the pattern data list of the selected accompaniment pattern data at each pitch stored in the adjustment DataList (or the area DataList if overwritten) is stored. The pitch is replaced, and accompaniment data is generated with the replaced content and transmitted to the tone generator circuit 9 (step S12 in FIG. 4).
[0048]
In this way, in the present embodiment, each pitch included in each event data in the pattern data list of the selected accompaniment pattern data is changed according to the key-press sound of the performer, and a new Since the accompaniment pattern data is generated, a stable accompaniment can be generated by a simple key pressing operation, and an accompaniment rich in change can also be generated.
[0049]
In the above (d) data list creation process, the adjustment DataList is created using the pitch conversion map. However, the adjustment DataList is created only by the algorithm without using the pitch conversion map. Also good. For example, first, for each pitch stored in the area KeyOnList, the pitch name Nk (x) is acquired and stored in the area Nk (x). Next, the pitch of each event data in the pattern data list of the selected accompaniment pattern data is stored in the area DataList, and this pitch is stored in the reference pitch name BNd of the accompaniment pattern data and the area KeyOnList. Based on the pitch name BNk of the reference sound determined from each pitch. Then, each pitch name corresponding to each pitch after fluctuation is compared with each pitch name Nk (x), and when the semitone distance between them is within “2”, for example, the pitch of the pitch The pitch is changed so that the name becomes the pitch name Nk (x).
[0050]
In this embodiment, the number of pitch conversion maps is one. However, the present invention is not limited to this, and a plurality of maps may be prepared so that a player can select one from them. Or you may make it prepare for every accompaniment pattern. Further, although each map data in the pitch conversion map is used as it is, the present invention is not limited to this, and the player may be able to edit it.
[0051]
Further, in the present embodiment, the event data is input by the performer from the MIDI keyboard device. However, the input means is not limited to this, and event data of a data format other than MIDI event data is used. The pitch information can be output by a keyboard device that outputs a sound, a device other than a keyboard device, for example, a stringed instrument type device, or a device that reproduces and outputs pre-stored performance data such as a sequencer. Any type of event data can be used as long as the event data can be input.
[0052]
In the present embodiment, the accompaniment pattern data is selected from a plurality of pre-created patterns and used. However, the present invention is not limited to this. It is also possible to edit an item and select it for use. The accompaniment pattern data may be for a plurality of parts. Further, in the present embodiment, the pitch data is stored in the pattern data list of the accompaniment pattern data. However, the present invention is not limited to this, and for example, a pattern expressed by the number of semitone distances from the reference sound is stored. May be.
[0053]
A program in which a storage medium storing software program codes for realizing the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU 3 or MPU) of the system or apparatus is stored in the storage medium. It goes without saying that the object of the present invention can also be achieved by reading and executing the code.
[0054]
In this case, the program code itself read from the storage medium realizes the novel function of the present invention, and the storage medium storing the program code constitutes the present invention.
[0055]
As a storage medium for supplying the program code, for example, a flexible disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW, magnetic A tape, a non-volatile memory card, a ROM, or the like can be used. Further, the program code may be supplied from a server computer via a communication network.
[0056]
Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also the OS running on the computer based on the instruction of the program code performs the actual processing. It goes without saying that a case where the functions of the above-described embodiment are realized by performing part or all of the above and the processing thereof is included.
[0057]
Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the case where the CPU 3 or the like provided in the board or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.
[0058]
【The invention's effect】
As described above, claim 1 or 2 According to the above-described invention, at least one pitch information is input, a second reference sound is determined from the input at least one pitch information, and based on the determined second reference sound Thus, each pitch information included in each event data in the accompaniment pattern data stored in the accompaniment pattern storage means is converted, that is, the input pitch information is not directly sounded, and the input operation is further performed. However, even if the performer is a beginner in particular, a stable accompaniment can be achieved with a simple input operation, since it does not have to be performed according to some rules (for example, rules in which the input pitch information constitutes a chord). Since the accompaniment pattern changes based on pitch information input by the performer, a variety of accompaniment can be generated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an automatic accompaniment generating apparatus according to an embodiment of the present invention.
2 is a diagram showing an example of one accompaniment pattern data read from the external storage device of FIG. 1 and stored in a predetermined area of the RAM of FIG. 1;
FIG. 3 is a diagram showing an example of a pitch conversion map for converting each tone pitch in a pattern data list of selected accompaniment pattern data in accordance with a player's key press sound;
FIG. 4 is a flowchart showing a procedure of accompaniment data generation processing executed by the automatic accompaniment generation device of FIG. 1, particularly a CPU.
FIG. 5 is a flowchart showing a detailed procedure of a data list creation processing subroutine of FIG. 4;
6 is a flowchart showing a continuation procedure of the data list creation processing subroutine of FIG. 5;
7 is a diagram showing an example of a processing result by a data list creation processing subroutine of FIGS. 5 and 6. FIG.
[Explanation of symbols]
3 ... CPU (decision means, conversion means, sound generator Steps 4) ROM (conversion map storage means), 5 ... RAM (accompaniment pattern storage means), 6 ... External storage device (accompaniment pattern storage means), 9 ... Sound source circuit (sound generation means), 100 ... External control device (input) means)

Claims (2)

Accompaniment patterns for storing accompaniment pattern data composed of a plurality of event data created in advance with a predetermined pitch name as a first reference sound, each event data including pitch information and pronunciation timing information Storage means;
Input means for inputting at least one pitch information;
Determining means for determining the pitch information as the second reference sound when one pitch information is input by the input means, and when one of the pitch information is input as the second reference sound. When,
The pitch name of each pitch information that can be included in each event data in the accompaniment pattern data can be input by the first pitch which is the pitch from the pitch name of the first reference tone and the input means. Each pitch information that can be included in each event data for each second pitch, which is a pitch from the pitch name of the second reference tone determined by the determining means, of the pitch name of each pitch information Conversion map storage means for storing a conversion map indicating how to convert
Calculating the first pitch for each pitch information included in each event data in the accompaniment pattern data, calculating the second pitch for each pitch information input by the input means, and Each sound included in each event data in the accompaniment pattern data based on the calculated first pitch, the calculated second pitch, and the conversion map stored in the pitch conversion map storage means Conversion means for converting high information and shifting each pitch information after the conversion based on the second reference sound ;
Automatic accompaniment generating apparatus characterized by having a Could sound generating means each event data in tone generation timing indicated by the sound generation timing information each pitch information obtained we were are included respectively by said converting means. Accompaniment pattern storage means, which is accompaniment pattern data composed of a plurality of event data created in advance with a predetermined pitch name as a first reference sound, each event data including pitch information and pronunciation timing information A storage procedure to be stored in
An input procedure for inputting at least one pitch information;
Determination procedure for determining the pitch information as the second reference sound when one pitch information is input by the input procedure, and any one of the pitch information when the plurality of pitch information is input. When,
For each pitch information included in each event data in the accompaniment pattern data, a first pitch that is a pitch from the pitch name of the first reference tone is calculated for each pitch information. In addition, for each pitch information input by the input procedure, a second pitch which is a pitch from the pitch name of the second reference tone determined by the determining means of each pitch information of the pitch information. A pitch is calculated, and the calculated first pitch, the calculated second pitch, and a conversion map stored in the pitch conversion map storage means are provided for each event data in the accompaniment pattern data. Each event data includes each first pitch of each pitch information that can be included and each second pitch of each pitch information that can be input by the input procedure. Based on an indication how the conversion of the pitch information obtained, the accompaniment converts each pitch information included in each of the event data in the pattern data, each pitch information after the conversion the second A conversion procedure to shift based on the reference sound ;
Program for executing a Could pronunciation procedures on a computer each event data each pitch information obtained we were by the conversion procedure are contained respectively sounding timing indicated by the sound generation timing information.

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