JPH10254448A - Automatic accompaniment device and medium recorded with automatic accompaniment control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic accompaniment device capable obtained an accompaniment which is rich in variation even specifying the inputting of simple chords. SOLUTION: Respective chord progression patterns of a major progression, a minor procession and a seventh progression are stored corresponding to kinds (a major, a minor, a seventh) of chords. Accompaniment patterns and chord progression patterns are stored every accompaniment style. In an automatic accompaniment, chords of a chord progression pattern corresponding to kinds of chords detected from a keyboard are read out. An accompaniment pattern is subjected to a sound pitch conversion based on the detected chords and the readout chords to be sounded. Data controlling the ON/OFF of an accompaniment pattern and data controlling a volume are made to be stored in a chord progression pattern. Then, parts of the accompaniment pattern are muffled temporarily and changes are added to a volume by reproducing the chord progression pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment apparatus for performing automatic accompaniment by converting an accompaniment pattern based on a chord input from a keyboard or the like and reproducing it.

[0002]

2. Description of the Related Art Conventionally, as an electronic musical instrument having an automatic accompaniment function, an accompaniment pattern composed of note chords based on predetermined chords is stored, and for example, a chord key range (low range key range or the like) of a keyboard is stored. Detect chords based on the key operated by
In some cases, note codes of an accompaniment pattern are pitch-converted based on the detected roots and types of chords, thereby performing automatic accompaniment matching the specified chord. As a method of designating (inputting) a chord by a keyboard operation, there is a method called “fingered” in which a chord is designated by depressing a key of an actual chord component sound, or one to three or so keys. There is a type called “single finger” that designates a chord by pressing a key based on a predetermined rule. "Fingered" is mainly for advanced users, while "Single finger" is for beginners and is a simple method of specifying chords.

[0003]

However, in "single finger", only simple basic chords such as major, minor, seventh and minor seventh can be designated, so that a variety of automatic accompaniment cannot be performed. There is a problem. For advanced users, it is possible to specify complex chords with "fingered" .However, when beginners play with "fingered", it is difficult to specify complex chords. There is a problem in changing the accompaniment. It is an object of the present invention to enable a variety of automatic accompaniments to be performed simply by specifying a simple chord.

[0004]

According to an aspect of the present invention, there is provided an automatic accompaniment apparatus for storing a plurality of sets of chord progression patterns associated with at least types of chords. A chord detecting means for detecting a chord input by the player; and performing an automatic accompaniment based on the chord progression pattern corresponding to the type of chord detected by the chord detecting means. It is characterized by.

[0005] Further, a medium recording an automatic accompaniment control program according to a second aspect of the present invention includes a step of detecting a chord input and designated by a player, and a plurality of sets of chord progressions associated with at least the type of chord. A step of performing an automatic accompaniment based on a chord progression pattern corresponding to the detected chord type among the patterns, and a program for executing the automatic accompaniment.

According to the automatic accompaniment apparatus of the first aspect of the present invention or the execution of the automatic accompaniment control program recorded on the medium of the second aspect, a chord input and designated by a player is detected, and the detected chord is detected. Automatic accompaniment is performed based on the chord progression pattern corresponding to the type of. The chord progression patterns in claims 1 and 2 correspond to, for example, at least types of simple chords (eg, major, minor, seventh, etc.), and rich chords suitable for the corresponding chord types. It consists of chord progressions that change. Therefore, by simply specifying and inputting a simple chord, automatic accompaniment is performed in a rich chord progression according to the input chord. It should be noted that this claim 1 and claim 2
May be associated not only with the type of chord but also with the root of the chord. In this case, the accompaniment pattern may be directly pitch-converted with the read chord information of the chord progression pattern to perform the automatic accompaniment.

On the other hand, according to the automatic accompaniment apparatus according to the third aspect of the present invention or the execution of the automatic accompaniment control program recorded on the medium according to the fourth aspect, the chord progression pattern corresponding to the type of the detected chord is provided. Are shifted based on the root of the detected chord and the root of the main chord of the chord progression pattern, and the automatic accompaniment is performed based on the shifted chord progression pattern. The chord progression patterns according to the third and fourth aspects are associated with the types of chords in the same manner as the chord progression patterns according to the first and second aspects, and provide a rich chord change suitable for the chord type. The root chord of the main chord of the chord progression is predetermined. In this case, since only the chord progression pattern corresponding to one type of root note needs to be used, the capacity of the storage means can be reduced.

According to the automatic accompaniment apparatus according to the fifth aspect of the present invention or the execution of the automatic accompaniment control program recorded on the medium according to the sixth aspect, each automatic accompaniment pattern has a chord progression pattern. It is possible to give an optimal chord progression. Further, according to the automatic accompaniment device according to the seventh aspect of the present invention or the execution of the automatic accompaniment control program recorded on the medium according to the eighth aspect, an advanced person who can designate a complex chord can be selected as desired. Chords can also be specified. According to the automatic accompaniment device of the ninth aspect of the present invention or the execution of the automatic accompaniment control program recorded on the medium of the tenth aspect, a chord progression pattern for each chord type is reproduced in parallel. Synchronization between chord types is achieved, and when the chord progression pattern is switched, there is no unnatural switching.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an electronic musical instrument to which the present invention is applied. A CPU 1 controls the entire electronic musical instrument using a working area of a RAM 3 based on a control program stored in a ROM 2. During a performance, a key code, a key-on signal, and the like from the keyboard 4 are taken in via a detection circuit 4a, a tone signal is generated by a tone generator circuit 5, an effect is given by an effect circuit 6, and a sound system 7 generates a tone. Note that the tone generator circuit 5 is capable of substantially simultaneously generating a plurality of sounds by time division multiplexing processing of a plurality of channels, and enables ensemble performance of automatic accompaniment and keyboard performance of a plurality of parts.

At the time of automatic accompaniment, a chord is detected from a chord key range (for example, a left key range) of the keyboard 4 in a selected mode of single finger or fingered, and preset to the ROM 2 according to the currently selected accompaniment style. The automatic accompaniment is performed by reading the accompaniment pattern or the accompaniment pattern stored in the RAM 3. At this time, if the "chord progression on" mode described later is designated,
The chord progression pattern stored in the ROM 2 or the RAM 3 is selected according to the accompaniment style, section, and type of the detected chord, and the pitch of the accompaniment pattern is converted based on the chord of the chord progression pattern and the detected chord. Also,
When the mode of “chord progression off” is designated, the accompaniment pattern is pitch-converted based on the detected chord, similarly to a normal automatic accompaniment device.

The panel switch 8 is provided with various switches (not shown).
Is detected via the detection circuit 8a,
A process corresponding to an operation event of each switch is performed. In the processing corresponding to the operation event of the panel switch 8, the accompaniment style switching processing, automatic accompaniment start / stop processing, automatic accompaniment section switching processing, chord progression on / off mode switching processing, fingered / single finger Of the chord designation mode. Also, it performs input processing of an accompaniment pattern or a chord progression pattern from the external storage device 9, input processing of an accompaniment pattern or a chord progression pattern supplied from an external device via the interface 10, processing of display control of the display circuit 11, and the like. .

The timer 12 generates an interrupt signal at a timing (for example, every 384th note) according to the tempo information set by the CPU 1 and the resolution of the accompaniment data.
U1 controls the automatic accompaniment by performing an interrupt process using the interrupt signal. The CPU 1 divides the frequency of the interrupt signal and performs an interrupt process at a timing (for example, every sixteenth note) according to the resolution of the chord progression pattern.

FIG. 2 is a diagram showing a data format of an accompaniment pattern and a chord progression pattern in the embodiment. Automatic accompaniment is based on the type of song (genre, etc.)
In this embodiment, accompaniment style data is provided for each accompaniment style. Each accompaniment style data contains an accompaniment pattern of a plurality of sections and a chord progression pattern of a plurality of sections. The “section” is a type of accompaniment pattern for changing the accompaniment according to the flow of the music. The “main” performs basic accompaniment throughout the music, and is a connection between measures and passages. And the like, "intro" to be inserted at the beginning of the song, and "ending" to be inserted at the end of the song.

The accompaniment pattern of each section is composed of a bass part, a chord part, and a rhythm part. Each accompaniment pattern is composed of note event data corresponding to each of the accompaniment sounds and the time between note events. It consists of timing data indicating the interval and end data. The note event data includes data such as note on / off, note number, velocity, and the like. Further, the timing data is recorded as a value based on a predetermined time resolution (a 384th note in this embodiment). The accompaniment pattern may include data other than note event data, such as pitch bend data and volume data. The number and types of sections are not limited to those described above. The length of the accompaniment pattern is one to a plurality of measures, and may be the same as or different from the length of the chord progression pattern.

The chord progression pattern for each section is divided into a base part and a chord part, and each part can have a different chord progression pattern. In addition,
A common chord progression pattern may be used for the bass part and the chord part. Then, in order to correspond to the type of chord specified by the player at the time of automatic accompaniment, chord progression patterns for major, minor, and seventh are prepared for each part. These chord progression patterns are considered to be chord progressions that result in rich chord changes appropriate to the corresponding chord types, but some of the major, minor, and seventh chords may be shared (for example, Common for major and seventh.) Basically, each section has a chord progression pattern, but some sections do not have a chord progression pattern (in the example of FIG. 2, the chord progression patterns of “intro” and “ending”). There is no.) Also, a chord progression pattern may be shared among a plurality of sections (see FIG. 2).
Has a common chord progression pattern between “Fill-in AA” and “Fill-in BB”. ).

Each chord progression pattern is composed of chord data, timing data and end data, and the chord data includes a root (root) and a type (type) of the chord, and in some cases, includes an on-bass. . The timing data indicates a time interval between the preceding and succeeding chord data, and is stored as a value based on a predetermined time resolution (in this embodiment, a sixteenth note). The length of the chord progression pattern is one to a plurality of measures, and the longer the chord progression pattern, the more varied automatic accompaniment becomes possible. That is, even if a short accompaniment pattern is repeatedly reproduced, if the chord progression pattern is long, it sounds as if a long accompaniment pattern is being reproduced.

FIGS. 3 to 8 are flowcharts of the main part of the control program executed by the CPU 1, and the control operation of the CPU 1 will be described based on the flowchart. 3 is a process corresponding to an operation event of the accompaniment style changeover switch or the section changeover switch of the panel switch 8, FIG. 4 is a process corresponding to a key event on the keyboard 6, and FIG. 5 is a process corresponding to an operation event of the chord progression switch. Each of these events is detected by a main routine (not shown) and branches to each process.

In the style / section changeover switch process shown in FIG. 3, in step S11, the accompaniment pattern to be reproduced is switched to the specified accompaniment style and accompaniment pattern in the section, and in step S12, it is determined whether or not automatic accompaniment is being performed. . If it is not during automatic accompaniment, the process returns to the original routine. If it is during automatic accompaniment, it is determined in step S13 whether or not "chord progression is on". Note that "whether or not automatic accompaniment is on" or "whether or not chord progression is on"
Is determined by referring to respective flags that are inverted according to operation events of the automatic accompaniment start / stop switch and the chord progression switch.

If the chord progression is not on in step S13, the process returns to the original routine. If the chord progression is on, in step S14, is there a chord progression pattern corresponding to the specified accompaniment style and section? Determine whether or not. If there is a corresponding chord progression pattern, the reproduction of the chord progression pattern is started in step S15. The start of reproduction means that interruption of every sixteenth note for reading a chord is permitted, and the chord progression pattern is not immediately reproduced in step S15. If there is no chord progression pattern corresponding to the accompaniment style and section specified in step S14, if there is a chord progression pattern being reproduced in step S16, the above interruption is prohibited, the reproduction is stopped, and the routine returns to the original routine. I do.

In the key press / key release processing of FIG.
It is determined in step 1 whether or not automatic accompaniment is being performed. If automatic accompaniment is not being performed, a sounding / silencing process corresponding to the key event is performed in step S22, and the process returns to the original routine. In S23, it is determined whether or not the key event is generated in the chord key range.
At step S22, a tone generation / muting process is performed. If the tone is in the chord key range, a chord is detected based on the key depression pattern at step S24, and the process returns to the original routine. The chord detection in step S24 is performed in a mode selected from either fingered / single finger.

In the chord progression switch process of FIG. 5, it is determined in step S31 whether or not "chord progression is off".
If it is not "chord progression off", it means that "chord progression is on" and "off" is specified, so that "chord progression off" is set in step S32 and the process returns to the original routine. If "chord progression is OFF" in step S31, it means that "ON" has been designated in the state of "chord progression OFF". Therefore, "chord progression ON" is set in step S33, and automatic accompaniment is in progress in step S34. It is determined whether or not.

If automatic accompaniment is not being performed in step S34, the process returns to the original routine. If automatic accompaniment is being performed, it is determined in step S35 whether a chord progression pattern corresponding to the accompaniment style and section being played is present. If there is no corresponding chord progression pattern, the process returns to the original routine. If there is a corresponding chord progression pattern, step S3
At step 6, the reproduction of the chord progression pattern is started, and the process returns to the original routine.

By the above processing, every time the chord progression switch is operated, "chord progression on" and "chord progression off" are switched. However, "chord progression off" is switched to "chord progression on" during automatic accompaniment. At that time, the chord progression pattern is reproduced after that point.

The chord progression pattern reproduction process of FIG. 6 is started for every sixteenth note, and "chord progression ON" in step S41.
It is determined whether or not the chord progression pattern is ON. If the chord progression is ON, the process returns to the original routine. If the chord progression is ON, the chord progression pattern corresponding to the accompaniment style and section being played in step S42. It is determined whether or not there is. If there is no corresponding chord progression pattern, the process returns to the original routine, and if there is a corresponding chord progression pattern, the process proceeds to step S43. In step S43, if there is a chord of the major chord progression pattern for the major at the current timing, it is reproduced. In step S44, if there is a chord of the minor chord progression pattern for the current timing, it is reproduced.
Then, if there is a chord of the seventh chord progression pattern at the current timing, the chord is reproduced and the process returns to the original routine. In addition,
In steps S43 to S45, three types of the major chord progression pattern, the minor chord progression pattern, and the seventh chord progression pattern are simultaneously reproduced, but not all chords are immediately reflected in the automatic accompaniment. That is, of the three types of chord progressions simultaneously played, only the chord progression of the type that matches the type of chord specified in the chord range of the keyboard is reflected in the automatic accompaniment.
As soon as the designated chord changes, the three types of chord progression patterns are reproduced in parallel so that the chord progression corresponding to the chord type can be reflected in the automatic accompaniment. By playing back the three types of chord progression patterns in parallel, the progression of the chord types can be synchronized, so that the chord progression patterns do not switch unnaturally. In other words, if there is only one chord progression, it is possible to consider various chord progressions that are effective for enriching the performance. However, if the chord types are switched separately for each chord type, There is a risk that the connection to the performance will be lost. Therefore, a chord progression pattern is created in consideration of the connection in the horizontal direction (between chord types) among the three types of chord progressions, and the chord types are switched by constantly reproducing them. Chords will switch naturally when you play.

When the chord progression pattern becomes end data, the chord progression pattern returns to the head of the chord progression pattern and is repeatedly reproduced. Therefore, if the same chord is specified for the length of the chord progression pattern, a series of chord progressions is repeated.

The automatic accompaniment process shown in FIG. 7 is executed when the automatic accompaniment is turned on, and is activated for every 384th note. In step S51, an accompaniment pattern reproduction process for the rhythm part is performed. In step S52, an accompaniment pattern reproduction process for the base part shown in FIG. 8 is performed. In step S53, an accompaniment pattern reproduction process for the chord part shown in FIG. Return to the original routine. The accompaniment pattern reproduced here is the accompaniment style of the currently playing accompaniment and the accompaniment pattern of the section. In the automatic accompaniment process, when the data of the accompaniment pattern becomes end data, the main section returns to the beginning of the accompaniment pattern and repeats the reproduction, the intro section shifts to the main A section, and the fill-in section returns Shifts to the main A section (for fill-in AA, BA) or the main B section (for fill-in AB, BB), and in the case of the ending section, controls the reproduction so as to stop the automatic accompaniment. Since the technology is a well-known technology, detailed description is omitted.)

FIG. 8 shows an accompaniment pattern reproduction process for the bass part and the chord part. Since these processes differ only in whether the target is a “base part” or a “code part”, the processes of “base” and “code” are simultaneously described in the flowchart of FIG. The processing for "code" is enclosed in "[]". First, in step S61, it is determined whether the chord detected from the key depression of the chord key range is one of a major, a minor, and a seventh.
Then, based on the detected root and type of the chord, the tone of the bass [chord] part is pitch-converted and pronounced, and the routine returns to the original routine. That is, the chord specified in the chord key range is directly reflected in the automatic accompaniment without using the chord of the chord progression pattern.

The detected chords are major, minor,
If it is any of the sevenths, it is determined whether or not "chord progression is on" in step S63. If "chord progression is not on", the process proceeds to step S62. If "chord progression is on", the process proceeds to step S64. move on. In step S64, it is determined whether or not there is a chord of a chord progression pattern corresponding to the accompaniment style, section, part, and the detected chord (major, minor, seventh) being played. If not, the process proceeds to step S62. If there is a chord of the corresponding chord progression pattern, the process proceeds to step S65. In step S65, the chord reproduced from the corresponding chord progression pattern is shifted according to the root of the chord detected from the key depression of the chord key range, and the bass [ [Chord] part is pitch-converted and pronounced,
Return to the original routine.

According to the above-described processing, when "chord progression on" designates, for example, a minor seventh by a single finger or a complex chord other than a major, minor, and seventh by fingering, the reproduced chord progression pattern is not used. The accompaniment will follow the specified chord. Also,
If a major, minor, or seventh chord is specified in "chord progression on", if there is a chord progression pattern corresponding to the accompaniment style, section, part, and detected chord, the accompaniment is in accordance with the chord progression pattern.

In the above example, when the style or section switch is operated during automatic accompaniment, the accompaniment pattern and the chord progression pattern are immediately switched by the style / section switching processing of FIG. The timing of the switching is not limited to this. For example, the accompaniment pattern and the chord progression pattern may be switched after a predetermined interval such as a bar line timing.

FIG. 9 is a diagram conceptually showing an example of a chord progression pattern. 9 (A) is a chord progression pattern of a major progression corresponding to a major chord, FIG. 9 (B) is a chord progression pattern of a minor progression corresponding to a minor chord, and FIG. 9 (C) is a seventh progression pattern corresponding to a seventh chord. The chord progression pattern is shown. In this example, each chord progression pattern is composed of two measures (the vertical line in the figure is a measure line). In this embodiment, the chord progression pattern is based on the root C. That is, the root of the main chord of the chord progression pattern is C, and each chord of the chord progression pattern is shifted based on the root of the chord detected from a key depression in the chord key range.

FIG. 10 is a diagram showing an example of a performance result based on the chord progression pattern of FIG. As shown in FIG.
Assuming that the designated chord (manual designated chord) input by the player changes from "C" to 2 measures "Am" 2 measures → "Dm7" 1 measure → "G7" 1 measure → "C" 2 measures → ... , The type of the chord progression pattern is (B),
It changes like (C) and (D). That is, when "C" is a major progress, when "Am" is a minor progress, "G7"
In the case of, the seventh progression is made, and in the case of "Dm7", it does not correspond to any type. When "chord progression is off", the chord progression is the same as that of the manually designated chord as shown in (E), but when "chord progression is on", it changes as shown in (F).

First, in the first and second measures, the measure progression corresponding to the manually designated chord "C" (FIG. 9 (A))
Changes from C → C6 → C → F on the basis of the chord progression pattern, and the third and fourth measures correspond to the chord progression pattern of the minor progression (FIG. 9B) corresponding to “Am” of the manually designated chord. Am7 → G → E ♭. In this case, the chord progression pattern is shifted based on the root of the manually designated chord “Am”. But,
In the fifth measure, the manually designated chord is “Dm7”, and in this embodiment, there is no corresponding chord progression pattern, so that it is “Dm7” as it is. Next, the sixth measure is G7 based on the chord progression pattern of the seventh progression (FIG. 9C) corresponding to the manually designated chord "G7", and the seventh and eighth measures are the first and second measures. C → C6 as well as the milestone
→ C → F. By simply designating a simple chord in this way, the chord progression is varied.

In the above embodiment, the accompaniment with various changes is performed only by the chord progression. However, the following second embodiment may be employed. FIG. 11 is a diagram showing an example of the data format of the chord progression pattern according to the second embodiment. In addition to the chord data, volume data for controlling the volume of the accompaniment pattern and on / off control for each part of the accompaniment pattern are performed. Part on / off data (cord part on / off in this example) is stored together with timing data. When the volume data is read at the time of reading the chord progression pattern, the volume of the accompaniment sound is controlled. When the part-off data is read, the sound generation of the part is stopped, and when the part-on data is read, the sound generation of the part is restarted.

FIG. 12 is a diagram conceptually showing an example of the chord progression pattern of the second embodiment. In the measure progression of FIG. 12A, a predetermined accompaniment part is turned off at the last part of the second bar. The pattern is such that the volume is changed from the latter half of the first measure. Also, in the minor progression of FIG.
A pattern in which a predetermined accompaniment part is turned off in the second half of the first bar and the first half of the second bar, and the volume is gradually lowered from the first bar to the first half of the second bar, and the volume is increased in the second half of the second bar. It has become. Further, FIG.
In the seventh progression of (C), a predetermined accompaniment part is turned off in the first half of the second bar, and the volume is gradually increased from the first bar to the end of the second bar.
In this way, by performing on / off control and volume control of the accompaniment part, it is possible to obtain accompaniment with more variety. The on / off control and the volume control may be performed simultaneously for all parts, or may be selectively controlled for each part.

In the embodiment, in order to detect a chord, the keyboard range is divided into a chord range and a non-chord range, and a chord is detected based on a key pressed in the chord range. However, the chord may be detected by determining the pressed state in all the key ranges without dividing the key ranges. Further, in the embodiment, a method in which a single finger and a fingered can be selected has been described, but a chord detection method may be a single finger only, a fingered only, or another method. Further, the present invention is also applicable to a format in which a chord is detected by the present device based on key press information input from an external device, or a format in which chord information itself is input to the present device from an external device.

In the embodiment, the chord progression pattern is provided for the three types (types) of major, minor, and seventh. However, the number of types having the chord progression pattern may be smaller or larger. .

In the embodiment, the chord progression pattern is provided for each style, section, and performance part. However, a chord progression pattern common to all styles, sections, and performance parts may be used. A plurality of chord progression patterns may be provided for each style, each section, each performance part, or the like, so that the user can select any one of them. In addition, a plurality of chord progression patterns may be provided irrespective of the style, section, or the like, and any one of the chord progression patterns may be selected by the user. When the user selects any one of these, if the chord progression pattern is selected according to a touch of a key, etc., it is possible to save time and effort for selection.
The chord progression changes according to the excitement of the performance, so that the performance is natural. Further, it may be possible to select whether or not to use the chord progression pattern for each performance part.

In the embodiment, the chord progression data is stored in the form of "timing + chord data".
However, the present invention is not limited to this, and may have a format in which a chord data storage area is provided for each predetermined section (for example, for each beat) and chord data is stored in a section where a chord is to be changed. The chord data is “root (root) + type (type), with on-base if necessary”, but may be “only type (type), with on-base if necessary”. In this case, a chord progression that changes even to the root of the chord cannot be obtained, but since the type changes, an accompaniment with quite various changes can be obtained by itself. Also, the on-base need not be provided.

In the embodiment, the accompaniment pattern data and the chord progression data are supplied as one accompaniment style data, but they may be stored in different files. Then, when the data of the accompaniment pattern is selected, the chord progression pattern corresponding to the data may be automatically searched and selected. Further, the chord progression pattern may be recorded and corrected by the user.

The present invention is not limited to a keyboard instrument but may be a stringed instrument type or the like. Further, the present invention is not limited to an electronic musical instrument having a built-in sound source circuit and an automatic accompaniment function, but may be a separate device such as a sound source device and a sequencer, which may be connected to each other using communication means such as MIDI or various networks. It may be something.

The present invention is not limited to the electronic musical instrument, but may be a personal computer + application software. The application software may be stored in a recording medium such as a magnetic disk, an optical disk, or a semiconductor memory and supplied to a personal computer, or supplied via a network.

In the embodiment, the format of the accompaniment data is "event + relative time" in which the performance event occurrence time is represented by the time from the immediately preceding event, but is not limited to this. "Event + Absolute time" that represents the occurrence time of a song as an absolute time in a song or bar
, The pitch and rest length, or the rest and rest length, which represent performance data in the form of "pitch (rest) + note length", or a memory area is reserved for each minimum resolution of performance. Any format such as a so-called “solid” format in which a performance event is stored in a memory area corresponding to a time at which a performance event occurs may be used.

The method of changing the tempo of the automatic accompaniment includes changing the period of the tempo clock (interrupt signal), and correcting the value of the timing data according to the tempo while keeping the period of the tempo clock. Any value may be used, such as changing the value (for example, the number to be reduced) for counting the timing data in the processes.

The data of the accompaniment pattern may be a format in which data of a plurality of channels are mixed, or a format in which the data of each channel is divided for each track.

The sound source system is a waveform memory system, F
Any system such as an M system, a physical model system, a harmonic synthesis system, a formant synthesis system, and an analog synthesizer system of VCO + VCF + VCA may be used. In addition, the sound source is not limited to the one using dedicated hardware, and the sound source may be constituted by a DSP and a microprogram, or the sound source may be constituted by a CPU and a software program. . Further, the tone generator circuit may be one in which a plurality of sound channels are formed by using one circuit in a time-division manner, or one in which one sound channel is constituted by one circuit. You may.

The control program is not stored in the ROM, but is stored in the hard disk. By reading the control program into the RAM, the same operation as in the case where the control program is stored in the ROM is performed by the CPU.
Can be made. This makes it easy to add a control program, upgrade a version, and the like. Further, the control program and the accompaniment data stored in the CD-ROM may be stored in the hard disk. In this way, a new installation or version upgrade of the control program can be easily performed. This CD-
In addition to the ROM, a device for utilizing various forms of media, such as a floppy disk device and a magneto-optical disk (MO) device, may be provided as an external storage device.

The communication interface may be used to download an automatic accompaniment control program, accompaniment pattern data, and chord progression pattern data. In this case, for example, it is connected to a communication network such as a LAN (local area network), the Internet, or a telephone line, and via this communication network,
By receiving data from the server computer,
Record it on your hard disk and download is complete.

[0049]

As described above, according to the execution of the automatic accompaniment control program recorded on the automatic accompaniment apparatus or the medium of the present invention, a plurality of sets of chord progression patterns associated with at least types of chords are stored. In addition, since the automatic accompaniment is performed based on the chord progression pattern corresponding to the type of the chord specified by the input, a variety of automatic accompaniments can be performed only by specifying a simple chord.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a diagram showing a data format of an accompaniment pattern and a chord progression pattern in the first embodiment.

FIG. 3 is a flowchart of a style / section changeover switch process in the embodiment.

FIG. 4 is a flowchart of key press / key release processing in the embodiment.

FIG. 5 is a flowchart of a chord progression switch process in the embodiment.

FIG. 6 is a flowchart of a chord progression pattern reproduction process in the embodiment.

FIG. 7 is a flowchart of an automatic accompaniment process in the embodiment.

FIG. 8 is a flowchart of an accompaniment pattern reproduction process of a base [chord] part in the embodiment.

FIG. 9 is a diagram conceptually showing an example of a chord progression pattern in the first embodiment.

FIG. 10 is a diagram showing chord changes of automatic accompaniment in the first embodiment.

FIG. 11 is a diagram showing an example of a data format of a chord progression pattern in the second embodiment.

FIG. 12 is a diagram conceptually showing an example of a chord progression pattern in the second embodiment.

[Explanation of symbols]

1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... keyboard, 5 ...
Tone generator 9, 9 external storage device, 10 interface, 12 timer.

Claims (10)

[Claims] 1. A chord progression pattern storage means for storing a plurality of sets of chord progression patterns associated with at least types of chords; and a chord detection means for detecting a chord input and designated by a player. An automatic accompaniment apparatus for performing automatic accompaniment based on the chord progression pattern corresponding to the type of chord detected by the detection means. 2. A step of detecting a chord input and designated by a player, based on a chord progression pattern corresponding to the detected chord type among a plurality of sets of chord progression patterns associated with at least the types of chords. Recording an automatic accompaniment control program for executing the step of performing an automatic accompaniment. 3. The chord progression pattern includes a root chord of a main chord, which is determined in advance. The chord progression pattern corresponding to the type of the detected chord is replaced with the root chord of the detected chord and the chord progression pattern. 2. The automatic accompaniment apparatus according to claim 1, wherein the automatic accompaniment apparatus shifts based on the root chord of the main chord and performs automatic accompaniment based on the shifted chord progression pattern. 4. The chord progression pattern, wherein a root of a main chord is predetermined, and the step of performing the automatic accompaniment includes:
The chord progression pattern corresponding to the type of the detected chord is shifted based on the root of the detected chord and the root of the main chord of the chord progression pattern. 3. The medium according to claim 2, wherein an automatic accompaniment is performed based on the result. 5. The automatic accompaniment device stores a plurality of automatic accompaniment patterns and performs automatic accompaniment based on the selected automatic accompaniment pattern, wherein the chord progression pattern storage means includes: A plurality of sets of chord progression patterns associated with at least types of chords are stored, the chord progression patterns corresponding to the selected automatic accompaniment patterns, and corresponding to the chord types detected by the chord detection means. The automatic accompaniment apparatus according to claim 1, wherein automatic accompaniment is performed based on the chord progression pattern. 6. The medium according to claim 6, wherein the medium stores an automatic accompaniment control program for executing a step of performing automatic accompaniment based on an automatic accompaniment pattern selected from a plurality of automatic accompaniment patterns. Each time, for a plurality of sets of chord progression patterns associated with at least the types of chords,
The step of performing the automatic accompaniment is a chord progression pattern corresponding to the selected automatic accompaniment pattern, and performing the automatic accompaniment based on the chord progression pattern corresponding to the type of the detected chord. 3. The medium according to claim 2, wherein: 7. The automatic accompaniment apparatus, wherein the chord type detected by the chord detection means is a chord type different from the chord type corresponding to the chord progression pattern stored in the chord progression pattern storage means. 2. The automatic accompaniment device according to claim 1, wherein the automatic accompaniment is performed based on the detected chord type without being based on the chord progression pattern. 8. The method of performing the automatic accompaniment on the medium, wherein the detected chord type is a chord type different from a chord type corresponding to the chord progression pattern.
3. The medium according to claim 2, wherein automatic accompaniment is performed based on the detected chord type without being based on the chord progression pattern. 9. The automatic accompaniment apparatus reproduces a plurality of sets of chord progression patterns stored in the chord progression pattern storage means in parallel, and corresponds to a chord type detected by the chord detection means. 2. The automatic accompaniment device according to claim 1, wherein a chord progression pattern of a set to be played is used. 10. The step of performing the automatic accompaniment of the medium includes playing back the plurality of sets of chord progression patterns in parallel, and using a set of chord progression patterns corresponding to the detected chord type. 3. The medium according to claim 2, wherein the medium is a medium.