JP3603587B2 - Automatic accompaniment device and storage medium - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic accompaniment apparatus and a storage medium for performing an automatic accompaniment by reproducing an automatic accompaniment pattern including event data for producing accompaniment sounds such as a rhythm sound and a bass sound.
[0002]
[Prior art]
As a conventional automatic accompaniment device for performing automatic accompaniment by reproducing an automatic accompaniment pattern, for example, Japanese Utility Model Publication No. 2508578 discloses an automatic accompaniment that can be simultaneously performed with one touch at a timing intended to change a beat and a rhythm pattern during automatic accompaniment. An apparatus is described.
[0003]
Specifically, such an automatic accompaniment device determines a position (address) from which event data in a rhythm pattern (automatic accompaniment pattern) is read when a start switch is turned on during automatic rhythm performance (automatic accompaniment playback). The counter is reset, and reading of the rhythm data is started from the head address of the variation pattern for the currently selected rhythm pattern in the rhythm pattern memory.
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional automatic accompaniment apparatus, the rhythm data is read from the beginning of the corresponding variation pattern immediately after the start switch is turned on, so that the user does not turn on the start switch with sufficient care. As far as possible, the beat positions before and after the shift were shifted, resulting in an unnatural time signature performance.
[0005]
The present invention has been made by paying attention to this point. Even if the user does not care about the timing of instructing the time signature performance, the user can perform the natural time signature performance at the exact timing intended by himself. It is an object of the present invention to provide an automatic accompaniment device and a storage medium that can be used.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the automatic accompaniment apparatus according to claim 1 includes a storage unit that stores automatic accompaniment pattern data including various event data for performing automatic accompaniment, and each event of the stored automatic accompaniment pattern data. Reproducing means for reading and reproducing the data; trigger generating means for generating a trigger indicating a request for shifting to an irregular time signature; and detecting for detecting that the reading position of the automatic accompaniment pattern data by the reproducing means has reached the back beat. Means for controlling, when a back beat is detected by the detecting means after a trigger is generated by the trigger generating means, to shift the reading position of the automatic accompaniment pattern data to a predetermined front beat position. And control means.
[0007]
The automatic accompaniment device according to claim 2 is a storage means for storing automatic accompaniment pattern data including various event data for performing automatic accompaniment, and a reproduction for reading and reproducing each event data of the stored automatic accompaniment pattern data. Means, a trigger generating means for generating a trigger indicating a request for shifting to a variable time signature, a detecting means for detecting that the reading position of the automatic accompaniment pattern data by the reproducing means has reached a front beat, and the trigger generating means Control means for controlling the read position of the automatic accompaniment pattern data to shift to a predetermined back beat position when a front beat is detected by the detection means after a trigger is generated by the trigger. Features.
[0008]
According to a third aspect of the present invention, there is provided an automatic accompaniment device for storing automatic accompaniment pattern data including various event data for performing an automatic accompaniment, and reproducing and reading each event data of the stored automatic accompaniment pattern data. Means, a trigger generating means for generating a trigger indicating a request to shift to a variable time signature, and when a trigger is generated by the trigger generating means, the reading position of the automatic accompaniment pattern data by the reproducing means is set to a half beat or Control means for controlling the movement to a position immediately after a half beat.
[0009]
A storage medium according to a fourth aspect of the invention reproduces and reads out and reproduces each event data of the automatic accompaniment pattern data stored in the storage means. Steps And a trigger that generates a trigger indicating a request to shift to odd time Steps And the playback Steps Detection that the reading position of the automatic accompaniment pattern data has reached the back beat Steps And the trigger occurrence Steps After the trigger is generated by the detection Steps When the back beat is detected, the control is performed such that the reading position of the automatic accompaniment pattern data is shifted to a predetermined front beat position. Steps When Automatic accompaniment method with Computer Let it run The program is stored.
[0010]
A storage medium according to claim 5, wherein each event data of the automatic accompaniment pattern data stored in the storage means is read and reproduced. Steps And a trigger that generates a trigger indicating a request to shift to odd time Steps And the playback Steps Detection that the reading position of the automatic accompaniment pattern data has reached the front beat Steps And the trigger occurrence Steps After the trigger is generated by the detection Steps Control to shift the reading position of the automatic accompaniment pattern data to a predetermined back beat position when a front beat is detected by Steps When Automatic accompaniment method with Computer Let it run The program is stored.
[0011]
7. The storage medium according to claim 6, wherein each event data of the automatic accompaniment pattern data stored in the storage means is read and reproduced. Steps And a trigger that generates a trigger indicating a request to shift to odd time Steps And the trigger occurrence Steps When a trigger is generated by the Steps Control to shift the reading position of the automatic accompaniment pattern data to a position immediately before or after a half beat Steps When Automatic accompaniment method with Computer Let it run The program is stored.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 is a block diagram showing a schematic configuration of the automatic accompaniment device according to the first embodiment of the present invention.
[0014]
As shown in FIG. 1, the automatic accompaniment device of the present embodiment includes a keyboard 1 for inputting pitch information, a panel switch 2 having a plurality of switches for inputting various information, A key press detection circuit 3 for detecting a key press state of each key, a switch detection circuit 4 for detecting a press state of each switch of the panel switch 2, a CPU 5 for controlling the entire apparatus, and a control program executed by the CPU 5 ROM 6 for storing performance data, table data, etc., RAM 7 for temporarily storing performance data, various input information, calculation results, and the like, a timer 8 for measuring an interrupt time and various times in a timer interrupt process, and displaying various information and the like. For example, a large liquid crystal display (LCD) or a CRT (Cathode Ray Tube) display and a light emitting diode (LED) are provided. Display device 9, a floppy disk drive (FDD) 10 for driving a floppy disk (FD) 20 as a storage medium, and a hard disk (not shown) for storing various application programs and various data including the control program. A hard disk drive (HDD) 11 for driving a drive, and a CD-ROM drive (CD-ROMD) for driving a compact disk-read only memory (CD-ROM) 21 for storing various application programs and various data including the control program. ) 12, a MIDI interface (I / F) 13 for receiving a MIDI (Musical Instrument Digital Interface) signal from the outside, and outputting the MIDI signal to the outside as a MIDI signal. A communication interface (I / F) 14 for transmitting and receiving data to and from a server computer 102 via a network 101, and a tone generator circuit for converting performance data input from the keyboard 1 or preset performance data into musical tone signals 15, an effect circuit 16 for imparting various effects to the tone signal from the tone generator circuit 15, and a tone signal from the effect circuit 16 which is converted into sound, for example, a DAC (Digital-to-Analog Converter) or the like. It comprises a sound system 17 such as an amplifier and a speaker.
[0015]
The above components 3 to 16 are mutually connected via a bus 18, a timer 8 is connected to the CPU 5, another MIDI device 100 is connected to the MIDII / F 13, and a communication network 101 is connected to the communication I / F 14. Are connected to the sound source circuit 15, an effect circuit 16 is connected to the sound source circuit 15, and a sound system 17 is connected to the effect circuit 16.
[0016]
As described above, the control program executed by the CPU 5 can also be stored in the hard disk of the HDD 11, and when the control program is not stored in the ROM 6, the control program is stored in the hard disk and read into the RAM 7. This allows the CPU 5 to perform the same operation as when the control program is stored in the ROM 6. By doing so, it is possible to easily add a control program or upgrade the version.
[0017]
The control program and various data read from the CD-ROM 21 of the CD-ROM drive 12 are stored on a hard disk in the HDD 11. As a result, a new installation or version upgrade of the control program can be easily performed. In addition to the CD-ROM drive 12, a device for utilizing various forms of media, such as a magneto-optical disk (MO) device, may be provided as an external storage device.
[0018]
As described above, the communication I / F 14 is connected to a communication network 101 such as a LAN (Local Area Network), the Internet, or a telephone line, and is connected to the server computer 102 via the communication network 101. When the above-described programs and various parameters are not stored in the hard disk in the HDD 11, the communication I / F 14 is used to download the programs and parameters from the server computer 102. A computer serving as a client (in the present embodiment, an automatic accompaniment device) transmits a command for requesting download of a program or parameter to the server computer 102 via the communication I / F 14 and the communication network 101. The server computer 102 receives the command, distributes the requested program or parameter to the computer via the communication network 101, and the computer receives the program or parameter via the communication I / F 14 and The download is completed by accumulating the data on the hard disk.
[0019]
In addition, an interface for exchanging data directly with an external computer or the like may be provided.
[0020]
FIG. 2 is a diagram exemplifying one of a plurality of (automatic) accompaniment pattern data stored in a predetermined area of the ROM 6, wherein each accompaniment pattern data is, for example, one already created and stored at the time of factory shipment. It is. Of course, the accompaniment pattern data may be created by the user. In this case, an area for storing the created accompaniment pattern data is secured on the RAM 7.
[0021]
The plurality of accompaniment pattern data includes, for example, various patterns such as 8-beat, 16-beat, and triple-link, among which are further composed of a rhythm-only part, a chord-only one part, and a bass. There are a single part consisting of only one part, a plural part such as rhythm, chord, bass, and the like. FIG. 2 exemplifies accompaniment pattern data consisting of only one part for convenience of explanation.
[0022]
In the figure, the accompaniment pattern data is composed of, for example, a MIDI code, and includes setting data unique to the accompaniment pattern data, such as data indicating the name of the accompaniment pattern, key-on event data for instructing the generation of musical tones, and It mainly consists of key-off event data for instructing the sound to be silenced, timing data indicating the generation timing of key-on event data or key-off event data, and end data indicating the end of the accompaniment pattern data.
[0023]
The key-on event data is composed of key-on data for instructing the tone generator 15 to generate sound, a note number indicating the pitch of the event, and velocity data indicating the velocity of the event.
[0024]
Although the data structure of the key-off event data is not shown, the key-off event data is composed of key-off data for instructing the tone generator 15 to mute the sound, and a note number indicating the pitch of the event. Note that, like the key-on event data, the velocity data may be included in the key-off event data. However, since the velocity data is not usually used at the time of silencing, in the present embodiment, the velocity data is included in the key-off event data. Absent.
[0025]
The timing data is provided in association with each event and indicates the occurrence timing of the event. Specifically, the timing data is integer value data indirectly indicating a time interval between adjacent events. That is, when the resolution of the musical sound reproduction (the minimum time interval between adjacent events) is, for example, 1 / 96th of the quarter note length (384th note length), the timing data value is multiplied by 384th note length. The corresponding time corresponds to the time from the occurrence of the event immediately before the timing data to the occurrence of the event accompanying the timing data (this time changes according to the tempo).
[0026]
It is assumed that the accompaniment pattern data in the present embodiment can store a sounding event (key-on / off event) with a 386th note length as a minimum unit (for each 386th note length). Of course, the pronunciation event may be stored in units of more or less.
[0027]
In the present embodiment, the accompaniment pattern data is configured as “event data + timing data (relative data)” as described above. However, the present invention is not limited to this. For example, “event data + absolute time data”, “sound” Any configuration such as “high data + note length data” may be used.
[0028]
The control process executed by the automatic accompaniment device configured as described above will be described in detail with reference to FIGS.
[0029]
FIG. 3 is a flowchart showing a procedure of a trigger detection processing subroutine executed by the automatic accompaniment apparatus of the present embodiment, particularly, the CPU 5. This process is started in response to a timer interrupt signal generated each time the timer 8 measures a predetermined time (for example, 1 msec).
[0030]
In the figure, first, it is determined whether or not a trigger event has occurred (step S1). Here, in the present embodiment, the trigger event occurs when a user operates a trigger switch (not shown) provided on the panel switch 2. Of course, the operation element that generates the trigger event is not limited to this, and may be, for example, a foot switch (not shown) or any key of the keyboard 1 to which a trigger function is assigned. . Further, the trigger event itself may be recorded in the automatic performance data, and the trigger event may be automatically generated by reproducing the trigger event.
[0031]
In step S1, when a trigger event occurs, a flag BEAT_REV indicating a modified time signature play request is set to "1"("1") (step S2), and then the present trigger detection processing is terminated, while a trigger event occurs. If not, the trigger detection process is immediately terminated.
[0032]
Here, the modified time signature performance means that the beat of the automatic accompaniment currently being reproduced is reversed (beat reverse), that is, in the present embodiment, the beat is shifted to the front beat at the timing when the current beat becomes the back beat. .
[0033]
FIG. 4 is a flowchart showing a procedure of an automatic accompaniment processing subroutine executed by the CPU 5. This process is also a timer interrupt process, like the trigger detection process. However, the trigger detection process is started at an absolute time of 1 msec, whereas the present process is performed at, for example, 1 / 96th of a quarter note length. The difference is that the activation is performed for each relative time at which the interruption interval changes according to the tempo of (384th note length). The accompaniment pattern data reproduced in the automatic accompaniment processing is selected by the user from a plurality of accompaniment pattern data stored in the ROM 6.
[0034]
In the figure, first, it is determined whether or not the reproduction position is the timing at which the back beat is positioned (step S11). Here, the timing at which the back beat is located refers to the timing at which the even-numbered eighth note is located when the automatic accompaniment pattern being reproduced is an 8-beat pattern, and the timing at which the even-numbered eighth note is located at a 16-beat pattern. This refers to the timing at which the minute note is located, and in the case of a triad pattern, refers to the timing at which the second or third note of the triplet is located.
[0035]
If it is determined in step S11 that the reproduction position is the timing at which the back beat is positioned, it is determined whether or not the flag BEAT_REV is "1" (step S12).
[0036]
In step S12, when BEAT_REV = 1, that is, when the user has requested odd-beat performance, the reproduction position is shifted to the front beat (step S13), and the flag BEAT_REV is reset ("0") (step S14). Thereafter, the process proceeds to step S15.
[0037]
Here, specific processing for shifting to the front beat in step S13 includes 1) the beginning of the accompaniment pattern data being reproduced, 2) the position of the immediately preceding beat, 3) the position of the immediately following beat, and 4) the next beat. 5) Refers to the process of shifting to one of the beginning of the bar and 5) the beginning of the current bar.
[0038]
FIG. 5 is a diagram showing an example of this odd time signature performance, and (a) to (e) show examples when the above-described processes 1) to 5) are performed, respectively. The accompaniment pattern data shown in the figure is data of eight beats and two measures in length, and this accompaniment pattern data is repeatedly reproduced. Note that the horizontal axis indicates the reproduction time.
[0039]
In FIG. 5A, when the user operates the trigger switch at the time of arrow a1, the trigger event is immediately detected, and the flag BEAT_REV is set. Then, at time t1, that is, until the playback position reaches the back beat position, the playback position is shifted to the beginning of the accompaniment pattern data being played. For example, when the accompaniment pattern data is read using a pointer, a specific transition process may be to set the position indicated by the pointer at the beginning of the accompaniment pattern data. Similarly, when the user operates the trigger switch at the time points of arrows a2 to a4, it waits at times t2 to t4, that is, waits until a back beat is first detected, and the reproduction position is set to the accompaniment pattern data being reproduced. Is moved to the beginning.
[0040]
As described above, the user can arbitrarily change the timing of operating the trigger switch, such as the middle of the third beat, the middle of the fourth beat, the middle of the first beat, and the like, so that the user can more freely perform a variable beat performance.
[0041]
In FIG. 5B, when the trigger switch is operated at the time of arrow a5, the reproduction position is shifted to the position of the immediately preceding beat at time t5 when the back beat is first detected. As the specific transition processing, as described with reference to FIG. 5A, it is conceivable to set the position indicated by the pointer to the position of the immediately preceding beat.
[0042]
FIG. 5C differs from FIG. 5B only in that the reproduction position is shifted to the position of the immediately following beat, and a description thereof will be omitted.
[0043]
In FIG. 5D, when the trigger switch is operated at the time of arrow a7, the playback position is shifted to the beginning of the next bar at time t7 when the back beat is detected first, and at the time of arrow a8. When the trigger switch is operated, the playback position is shifted to the beginning of the first bar at time t8 when the back beat is detected first, that is, since there is no next bar at this time.
[0044]
FIG. 5E is different from FIG. 5D only in that the reproduction position is shifted to the beginning of the current bar, and the description thereof is omitted.
[0045]
Returning to FIG. 4, if BEAT_REV = 0 in step S12, skip steps S13 and S14 and proceed to step S15. If it is determined in step S11 that the reproduction position is not the timing at which the back beat is located, step S12 The process skips steps S14 to S15.
[0046]
In step S15, the accompaniment pattern at the playback position is read and sounded. Specifically, if there is a key-on event at the reproduction position, the event is read out and sent to the tone generator circuit 15 to generate a sound. When the read key-on event is a bass or chord, the pitch is converted so as to be in harmony with a separately specified chord, and then transmitted to the tone generator 15.
[0047]
In a succeeding step S16, the present accompaniment process is terminated after the reproduction position is advanced. Specifically, the playback position of the automatic accompaniment pattern is advanced by the minimum resolution (in this embodiment, a time corresponding to 1 / 96th of a quarter note length). Then, when the playback position reaches the end of the automatic accompaniment pattern, it returns to the beginning.
[0048]
Although the automatic accompaniment apparatus according to the present embodiment is described as being controlled only by the timer interrupt processing, this is only for the convenience of explanation, and various controls are actually performed by the main routine. Is being done.
[0049]
As described above, in the present embodiment, regardless of the timing at which the trigger switch is operated, the playback position is shifted to the position of the corresponding front beat when the playback position becomes the back beat. Even if you do not care about the timing of operating the switch, it is possible to perform accurate odd-beat performance. In addition, since the beat position is changed in time, the beat positions before and after the shift are not shifted, and the process can shift to a natural changed time performance. Moreover, since the reproduction starts from the front beat after the transition, "beat reversal" is easy to understand.
[0050]
Next, a second embodiment of the present invention will be described.
[0051]
The automatic accompaniment device of the first embodiment shifts its playback position to a back beat when the back beat is first detected after the operation of the trigger switch. The automatic accompaniment device is different in that, when the beat is first detected after the operation of the trigger switch, the playback position is shifted to the beat. That is, the automatic accompaniment device of the present embodiment can be realized by changing a part of the automatic accompaniment processing subroutine of the first embodiment. Therefore, in the present embodiment, the same hardware as in FIG. 1 and the same trigger detection processing as in FIG. 3 are used, and the description of both will be omitted. Further, in FIG. 6, the same processes as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.
[0052]
FIG. 6 is a flowchart showing a procedure of an automatic accompaniment processing subroutine executed by CPU 5 of the automatic accompaniment apparatus of the present embodiment.
[0053]
In the figure, first, it is determined whether or not the reproduction position is the timing of the position of the front beat (step S21). Here, the timing at which the front beat is located refers to the timing at which the odd eighth note is located when the automatic accompaniment pattern being reproduced is an 8-beat pattern, and the timing at which the odd-numbered eighth note is located at a 16-beat pattern. This refers to the timing at which a minute note is located, and in the case of a triple connection pattern, refers to the timing at which the first note of a triplet is located.
[0054]
In step S21, when the reproduction position is the timing at which the front beat is located, the process proceeds to step S12, and when BEAT_REV = 1, the reproduction position is shifted to the back beat (step S23). Here, the processing of step S23 is specifically performed in the following manner: 1) the position of the first back beat, 2) the position of the last back beat, 3) the position of the immediately preceding back beat, 4) of the automatic performance pattern being reproduced. Immediate back beat position, first back beat position of current bar, last back beat position of current bar, last back beat position of previous bar, first back beat position of next bar, etc. In the case of a triple connection pattern, it is conceivable to shift to the second or third position of the triplet.
[0055]
FIGS. 7A and 7B are diagrams showing an example of a modified time signature performance by the automatic accompaniment device according to the present embodiment, wherein FIG. 7A shows an example when the process of 1) is performed in step S23, and FIG. An example when the processing of the above 2) is performed, (c) shows an example when the processing of the above 3) is performed, and (d) shows an example when the processing of the above 4) is performed. (E) shows an example when the processing of the above (5) is performed. Note that the example of FIG. 7 can be easily understood from the example of FIG. 5, and thus the description thereof is omitted.
[0056]
As described above, in the present embodiment, regardless of the timing at which the trigger switch is operated, the playback position is shifted to the position of the corresponding back beat when the playback position reaches the front beat, so that the user can use the trigger switch. Even if you do not care about the timing of operating the switch, it is possible to perform accurate odd-beat performance.
[0057]
Next, a third embodiment of the present invention will be described.
[0058]
The automatic accompaniment device of the present embodiment is realized by combining the control processes of the automatic accompaniment devices of the first and second embodiments. That is, after the operation of the trigger switch, the automatic accompaniment processing described in the first embodiment is performed when the first detected beat is a back beat, and the automatic accompaniment processing described in the second embodiment is performed when the beat is a front beat. An automatic accompaniment process is performed. Therefore, the automatic accompaniment device of the present embodiment also differs from the automatic accompaniment devices of the first and second embodiments only in a part of the automatic accompaniment processing, so that the same hardware as that of FIG. And the same trigger detection processing as that of FIG. 3 is used, and the description of both will be omitted. Further, in FIG. 8, the same processes as those in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted.
[0059]
In FIG. 8, the processes in steps S37 to S40 are the same as the processes in steps S11 to S14 in FIG. 4, respectively, and a description thereof will be omitted.
[0060]
FIG. 9 is a diagram showing an example of a modified time signature performance by the automatic accompaniment device of the present embodiment. As shown in FIG. 9, when the trigger position (arrow position) is immediately before the back beat, the reproduction position is set. Is shifted to the front beat, and when the trigger position is immediately before the front beat, the reproduction position is shifted to the back beat.
[0061]
As described above, after the trigger switch is operated, when the first detected beat is a back beat, the playback position is shifted to the front beat, and when the beat is the front beat, the playback position is shifted to the back beat. In addition, compared to the automatic accompaniment device according to the second embodiment, the waiting time until the transition can be shortened. For example, in the first embodiment, if the trigger switch is operated immediately after the back beat, the timing at which the playback position shifts to the front beat is the playback timing of the next back beat, and therefore, is approximately one beat. Although there is a waiting time (the same problem also occurs in the second embodiment), in the present embodiment, the waiting time is a maximum of half a beat.
[0062]
Next, a fourth embodiment of the present invention will be described.
[0063]
The present embodiment is different from the first to third embodiments in that the process can be shifted to odd-beat performance without waiting time. This embodiment can also be realized by changing a part of the automatic accompaniment processing subroutine of the first embodiment. Therefore, in the present embodiment, the same hardware as in FIG. 1 and the same trigger detection processing as in FIG. 3 are used, and the description of both will be omitted. Further, in FIG. 10, the same processes as those in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted.
[0064]
In FIG. 10, when the flag BEAT_REV is "1" in step S12, the process proceeds to step S53, and the reproduction position is advanced (or returned) by half a beat. When the triple accompaniment pattern data is being reproduced, one or two notes of the triplet are advanced or returned.
[0065]
FIGS. 11A and 11B are diagrams showing an example of this strange time signature performance. FIG. 11A shows an example in which processing for advancing the playback position by half a beat is performed, and FIG. This shows an example when the operation is performed.
[0066]
In FIG. 11A, when the trigger switch is operated at the time of the arrow a1, at the time t1, the reproduction position is shifted to a position at the time t2, which is a half beat ahead of that. Further, in FIG. 11B, when the trigger switch is operated at the time of arrow a2, the reproduction position is shifted to a position of time t3 half a beat before that at time t4.
[0067]
As described above, in the present embodiment, as soon as the trigger switch is operated, the playback position advances or returns by half a beat, so that at the moment the playback position shifts, the connection of the performance may become unnatural. However, it is possible to perform the time signature immediately without waiting time.
[0068]
In the first embodiment and the third embodiment in which the reproduction position reaches the back beat first, when the triad accompaniment pattern data is reproduced, two triplet notes are reproduced. At the time of reaching the position of the third note, it may be shifted to the front beat (the first position of the triplet), or at the time of reaching the position of the third note of the triplet, The transition may be made. At this time, the beat may be shifted to the first beat when the first note is reached, or may be fixed at one of the timings (that is, the first beat is reached when the second note position is reached). , But not when the position of the third note is reached, or vice versa.) Alternatively, the second and third modes may be switched randomly or alternately. In addition, the user may be able to select a preferred mode from these various transition modes.
[0069]
In the second embodiment, and in the third embodiment in which the playback position reaches the front beat first, when the triad accompaniment pattern data is being played, the front beat has been reached. At this point, it may be shifted to the second position of the triplet, or may be shifted to the third position of the triplet. At this time, the migration destination may be fixed to one of the timings, or the second and third locations may be switched randomly or alternately.
[0070]
Further, in the fourth embodiment, when triad accompaniment pattern data is being reproduced, the amount of advance or rewind may be one or two triplet notes. It may be fixed, or one or two may be switched randomly or alternately.
[0071]
In the first to fourth embodiments, the user selects the automatic accompaniment pattern first. However, the present invention is not limited to this. For example, “8 beats”, “16 beats”, “ Information such as "triple connection" is provided, and control is automatically performed at which timing (eighth note, sixteenth note, triplet), or at which timing. You may. Alternatively, the user may be allowed to arbitrarily make settings such as when to shift to or when to shift to. In particular, in the case of 16 beats, a setting may be made such that the timing shifts to the timing of an eighth note instead of the sixteenth note, or shifts to the timing of the eighth note instead of the sixteenth note. Alternatively, as a trigger operator, an operator for instructing transition at eighth note timing and an operator for instructing transition at sixteenth note may be separately provided so that either one can be instructed in real time. .
[0072]
Also, when the automatic accompaniment pattern data is composed of a plurality of parts, instead of performing all the parts in a varied time signature, only one or more specific parts (for example, only a rhythm part or only a rhythm part and a bass part) are performed. May be performed in odd time. In this case, the conventional automatic accompaniment may be performed for the parts for which the irregular time signature performance is not performed.
[0073]
Further, the beat timing may be displayed together with the automatic accompaniment, and the beat timing display method is such that a constant beat timing is always displayed regardless of whether the beat is reversed by the beat reverse function. Alternatively, the beat timing may be reversed in synchronization with the reverse of the beat.
[0074]
Also, the accompaniment pattern may be switched in accordance with the beat being reversed by the beat reverse function. In this case, after switching to a different accompaniment pattern for a moment, such as a fill-in pattern, the pattern may return to the original pattern, or the switched pattern may continue until the next beat reverse.
[0075]
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 5 or MPU) of the system or apparatus stores the program stored in the storage medium. It goes without saying that the object of the present invention is also achieved by reading and executing the code.
[0076]
In this case, the program code itself read from the storage medium implements the novel function of the present invention, and the storage medium storing the program code constitutes the present invention.
[0077]
As the storage medium for supplying the program code, for example, the above-mentioned floppy disk 20, hard disk, optical disk, magneto-optical disk, CD-ROM 21, CD-R, magnetic tape, nonvolatile memory card, ROM 6, etc. may be used. it can. Further, the program code may be supplied from the server computer 102 via another MIDI device 100 or the communication network 101.
[0078]
In addition, the functions of the above-described embodiments are implemented when the computer executes the readout program codes, and the OS or the like running on the computer performs the actual processing based on the instructions of the program codes. It goes without saying that a part or all of the above is performed and the functions of the above-described embodiments are realized by the processing.
[0079]
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 CPU 5 or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.
[0080]
【The invention's effect】
As described above, according to the first and fourth aspects of the present invention, when the back beat is detected after the trigger is generated, the reading position of the automatic accompaniment pattern data is set to the position of the predetermined front beat. Since the transition is made, there is an effect that the user can perform a natural time signature performance at the correct timing intended by himself without having to pay attention to the timing at which the user gives the instruction of the time signature performance.
[0081]
According to the second and fifth aspects of the present invention, when a front beat is detected after a trigger is generated, the reading position of the automatic accompaniment pattern data shifts to a predetermined back beat position. Even if the user does not care about the timing of instructing the time signature performance, the user can perform the natural time signature performance at the exact timing intended by the user.
[0082]
Further, according to the third and sixth aspects of the present invention, immediately after the trigger is generated, the read position of the automatic accompaniment pattern data shifts to a position immediately before or immediately after a half-beat, so that the read-out position changes immediately without waiting time. Can perform time signature performances.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an automatic accompaniment device according to a first embodiment of the present invention.
FIG. 2 is a diagram showing an example of accompaniment pattern data stored in a predetermined area of a RAM of FIG. 1;
FIG. 3 is a flowchart showing a procedure of a trigger detection processing subroutine executed by the automatic accompaniment device of FIG. 1, in particular, a CPU;
FIG. 4 is a flowchart showing a procedure of an automatic accompaniment processing subroutine executed by the CPU of FIG. 1;
FIG. 5 is a diagram showing an example of a modified time signature performance by the automatic accompaniment device of FIG. 1;
FIG. 6 is a flowchart showing a procedure of an automatic accompaniment processing subroutine executed by a CPU of the automatic accompaniment apparatus according to the second embodiment of the present invention.
FIG. 7 is a diagram showing an example of a modified time signature performance by the automatic accompaniment device of FIG. 6;
FIG. 8 is a flowchart showing a procedure of an automatic accompaniment processing subroutine executed by a CPU of an automatic accompaniment device according to a third embodiment of the present invention.
FIG. 9 is a diagram showing an example of a modified time signature performance by the automatic accompaniment device of FIG. 7;
FIG. 10 is a flowchart showing a procedure of an automatic accompaniment processing subroutine executed by a CPU of an automatic accompaniment device according to a fourth embodiment of the present invention.
FIG. 11 is a diagram showing an example of odd time performance by the automatic accompaniment device of FIG. 10;
[Explanation of symbols]
2 Panel switch (trigger generation means)
5 CPU (reproduction means, detection means, control means)
6 ROM (storage means)

Claims (6)

Storage means for storing automatic accompaniment pattern data composed of various event data for performing automatic accompaniment,
Reproducing means for reading and reproducing each event data of the stored automatic accompaniment pattern data;
Trigger generating means for generating a trigger indicating a request for transition to a variable time signature,
Detecting means for detecting that the reading position of the automatic accompaniment pattern data by the reproducing means has reached a back beat,
After the trigger is generated by the trigger generating unit, when a back beat is detected by the detecting unit, a control unit that controls to shift a reading position of the automatic accompaniment pattern data to a predetermined front beat position. An automatic accompaniment device comprising: Storage means for storing automatic accompaniment pattern data composed of various event data for performing automatic accompaniment,
Reproducing means for reading and reproducing each event data of the stored automatic accompaniment pattern data;
Trigger generating means for generating a trigger indicating a request for transition to a variable time signature,
Detecting means for detecting that the reading position of the automatic accompaniment pattern data by the reproducing means has reached a front beat;
After the trigger is generated by the trigger generating means, when a front beat is detected by the detecting means, control means for controlling the read position of the automatic accompaniment pattern data to shift to a predetermined back beat position. An automatic accompaniment device comprising: Storage means for storing automatic accompaniment pattern data composed of various event data for performing automatic accompaniment,
Reproducing means for reading and reproducing each event data of the stored automatic accompaniment pattern data;
Trigger generating means for generating a trigger indicating a request for transition to a variable time signature,
And control means for controlling, when a trigger is generated by the trigger generation means, a transition of a reading position of the automatic accompaniment pattern data by the reproduction means to a position immediately before or immediately after a half beat. Automatic accompaniment device. A reproducing step of reading and reproducing each event data of the automatic accompaniment pattern data stored in the storage means,
A trigger generating step for generating a trigger indicating a request for transition to a variable time signature;
A detection step of detecting that the reading position of the automatic accompaniment pattern data by the reproduction step has reached a back beat;
After a trigger is generated by the trigger generation step , when a back beat is detected by the detection step , a control step of controlling the read position of the automatic accompaniment pattern data to shift to a predetermined front beat position.
A computer-readable storage medium storing a program for causing a computer to execute the automatic accompaniment method having the above . A reproducing step of reading and reproducing each event data of the automatic accompaniment pattern data stored in the storage means,
A trigger generating step for generating a trigger indicating a request for transition to a variable time signature;
A detecting step of detecting that the reading position of the automatic accompaniment pattern data by the reproducing step has reached a front beat;
After the trigger is generated by the trigger generation step , when a front beat is detected by the detection step , a control step of controlling the read position of the automatic accompaniment pattern data to shift to a predetermined back beat position.
A computer-readable storage medium storing a program for causing a computer to execute the automatic accompaniment method having the above . A reproducing step of reading and reproducing each event data of the automatic accompaniment pattern data stored in the storage means,
A trigger generating step for generating a trigger indicating a request for transition to a variable time signature;
When the trigger is generated by the trigger generating step, a control step of controlling so as to shift the reading position of the automatic accompaniment pattern data by said reproduction step the immediately following half-beat before or semi beat position
A computer-readable storage medium storing a program for causing a computer to execute the automatic accompaniment method having the above .

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