JP2006201654A - Accompaniment following system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system in which music tone of automatic performance can be controlled so as to follow the performance of a player. <P>SOLUTION: A priority order, which indicates the ranking in the degree to stand out performance sound, is respectively given to a plurality of session devices 10 that conduct sessions. Then, a priority order determining server device 70 extracts the key and the tempo of the performance by the session device 10, to which a highest priority order is given, through a tempo and pitch extracting circuit 30 so that the key and the tempo of accompaniment sound can follow in accordance with the extracted key and tempo. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for automatically giving a good accompaniment sound to a performance sound of a musical instrument.

As a document disclosing a technique for supporting a music activity performed by a plurality of performers, for example, Patent Document 1 can be cited. The music data creation system disclosed in this document includes a client PC that connects each performer's musical instrument and a server that responds to an inquiry from each client PC. Each client PC is equipped with a chat function in addition to a function of uploading song data to the server. Each performer can compose music data by uploading each created music data to a server while communicating with each other using a chat function.
JP 2001-195064 A

By the way, in a performance activity performed by a plurality of performers as described above, each performer performs his / her own performance in accordance with the reproduction of an accompaniment prepared in advance by MIDI (musical instruments digital interface) data or the like. I often play musical instruments. This is because it is possible to avoid inconveniences such as variations in performance tempo by allowing each performer to perform along with the accompaniment.
However, when performing along with accompaniment playback in this way, each performer must perform at a performance that is faithful to the tempo of the accompaniment. It was difficult to include improvised expressions such as seeing, and as a result, there was a problem that musical interest was halved.
The present invention has been devised to solve such a problem, and an object of the present invention is to provide a mechanism capable of controlling the tune of automatic accompaniment following the performance by a performer.

  An accompaniment follow-up system according to a preferred aspect of the present invention includes an input unit for inputting performance sounds from a plurality of musical instruments, an accompaniment storage unit for storing musical tone information of a series of accompaniment sounds to be an accompaniment, and each instrument. Among them, a lead instrument specifying means for specifying a musical instrument to be given initiative of performance according to a predetermined condition and an accompaniment sound are generated based on musical tone information stored in the accompaniment music storage means, and the generated accompaniment sounds are sequentially output. An accompaniment music output means, a tempo extraction means for extracting the tempo of the performance by the musical instrument from the performance sound input via the input means from the musical instrument identified by the lead instrument identification means, and the accompaniment music output means. Tempo follow-up control means for controlling the tempo of the accompaniment sounds to be sequentially output so as to coincide with the tempo extracted by the tempo extraction means.

  In this aspect, the key extraction means extracts the key of the performance by the musical instrument specified by the lead musical instrument specifying means from the performance sound, and the key of the accompaniment sound sequentially output by the accompaniment music output means. A key follow-up control unit that controls the key to match the key may be further provided.

  In addition, the initiative instrument storage unit that stores the transition of the instrument that gives the initiative in association with the elapsed time from the start of performance, the initiative instrument specifying unit, according to the stored contents of the initiative schedule storage unit You may make it identify the musical instrument which gives initiative in order.

  In addition, a sensor for detecting the state of each of the musical instruments or their performers may be provided, and the lead instrument specifying means may specify a musical instrument to which the initiative is given according to a detection result by each sensor. .

  According to the present invention, the tune of automatic accompaniment can be controlled following the performance by the performer.

(First embodiment)
A first embodiment of the present invention will be described.
First, main terms used in the following description are defined. “Performer” means an individual who has a session device (musical instrument) and participates in the session. “Performance sound” means a musical sound obtained by playing a session device. “Accompaniment sound” means a musical sound created electronically to reinforce a performance sound. The “priority order” means a number representing an order of degree of conspicuous performance sound.

  The accompaniment follow-up system according to the present embodiment has the following two features. The first feature is that one of a plurality of session devices that play a performance song prepared in advance is given the initiative of performance, and the key of the accompaniment is assigned to the performance of the session device that has given the initiative. This is the point that automatically follows the tempo. The second feature is that the session device to which the initiative is given is sequentially switched according to the progress of the session.

FIG. 1 is an overall configuration diagram of an accompaniment follow-up system according to the present embodiment. As shown in the figure, this system includes a plurality of session devices 10, a selector 20, a tempo / pitch extraction circuit 30, an acoustic mixer 40, a speaker 50, an accompaniment playback device 60, and a priority order determination server device 70.
The session device 10 is a variety of musical instruments such as a piano, bass, and drum, and supplies musical sound signals of performance sounds to the selector 20 and the acoustic mixer 40, respectively.

  The selector 20 includes a plurality of input interfaces 21 to 23 for inputting a musical sound signal from each session device 10 and a single output interface 25 for outputting the musical sound signal to the tempo / pitch extraction circuit 30. Each input interface 21 to 23 is assigned a unique number (hereinafter, referred to as “interface number”) for identifying each. In response to a command from the priority determination server device 70, the selector 20 sends a musical sound signal input from one of the plurality of input interfaces 21 to 23 to the tempo / pitch extraction circuit 30 via the output interface 25. Output.

The tempo / pitch extraction circuit 30 extracts the tempo and pitch from the musical tone signal of the performance sound input via the selector 20 and supplies the extracted tempo and pitch to the priority determination server device 70.
As a tempo extraction method by the tempo / pitch extraction circuit 30, a portion where the amplitude of the waveform represented by the musical tone signal exceeds a predetermined value is sequentially identified as a strong attack portion, and the time interval of each identified attack portion is determined. Extraction as tempo can be assumed. Further, as a pitch extraction method, a method of extracting a fundamental frequency of a waveform indicated by a musical tone signal as a pitch can be assumed.

The acoustic mixer 40 includes a plurality of input interfaces 41 to 44 for inputting musical tone signals from each session device 10 and the accompaniment playback device 60, and a single output interface 45 for outputting the mixed musical tone signals to the speaker 50. The input interface 44 is secured as a dedicated interface for the accompaniment playback device 60, and interface numbers corresponding to the input interfaces 21 to 23 of the selector 20 are assigned to the other input interfaces 41 to 43, respectively.
As will be described in detail later in the description of the operation, the acoustic mixer 40 determines the mixing ratio of the musical sound signals input from the session device 10 via the input interfaces 42 to 44 from the priority determination server device 70. It is changed appropriately according to the command.

FIG. 2 is a hardware configuration diagram of the accompaniment playback device 60. As shown in the figure, this device 60 includes a CPU 61 that performs various controls, a RAM 62 that provides a work area to the CPU 61, a ROM 63 that stores an IPL (initial program loader), and communication that exchanges various types of information with an external device. An interface 64, an accompaniment sound output interface 65 for outputting a musical sound signal to the acoustic mixer 40, and a hard disk 66 storing a music database 66a are provided. The music database 66a stores a plurality of music sequence data each corresponding to one accompaniment music.
In the music sequence data stored in the music database 66a, a ranking schedule fixed type in which priority order transition information is recorded in advance, and a ranking which can be set by the player himself without priority order transition information being recorded. There are two types of schedule setting types. Here, the priority order transition information means information that represents the transition of the priority order to be given to each session device 10 in time series.
FIG. 3 is a data structure diagram showing fixed sequence schedule type music sequence data. As shown in the figure, the music sequence data includes a header portion 91 and a data portion 92. The header section 91 includes song name information indicating the song name of the performance song, music tone information indicating the standard key and tempo of the performance song, instrument type information indicating the instrument type of each instrument required for the performance song, and ranking. Type type information indicating that the type is a fixed schedule type is recorded.
The data section 92 is divided into an accompaniment track 93 and a production schedule track 94. On the accompaniment track 93, audio data indicating a series of accompaniment sounds to be an accompaniment is recorded in time series.

In the performance schedule track 94, priority order transition information is recorded. This will be described in more detail with reference to FIG. 3. In the example shown in FIG. 3, “Piano: 1”, “Bass: 2”, “Drum: 3” are used until 10 seconds have elapsed from the start of the session. Is recorded as “Piano: 2”, “Bass: 1”, “Drum: 3” for 10 to 20 seconds, and “Piano” for 20 to 30 seconds. : 1 "," Base: 2 ", and" Drum: 3 ". In other words, the highest priority is given to the piano for 10 seconds from the start of the session, the priority of the piano and bass is reversed after 10 seconds, and the reversed priority is restored after 20 seconds. It shows that it has become. As will be described in detail later in the explanation of the operation, the session device 10 having the highest priority “1” is given the initiative of the performance, and the initiative is held during the session. The key and tempo of the accompaniment are controlled so as to follow the performance of the given session device 10.
On the other hand, in the case of rank sequence setting type music sequence data, the data section 92 does not have the production schedule track 94. In addition to the song title information, the tone information, and the instrument type information, the header portion 91 may record type type information indicating that it is a rank schedule setting type.

  FIG. 4 is a hardware configuration diagram of the priority order determination server device 70. As shown in the figure, this apparatus 70 includes a CPU 71 that performs various controls, a RAM 72 that provides a work area to the CPU 71, a ROM 73 that stores an IPL, a communication interface 74, a computer display 75, a mouse 76, a keyboard 77, and a hard disk 78. Etc. The hard disk 78 stores an accompaniment follow-up control program 78a. This program 78a is a unique program for realizing the functions characteristic of the present embodiment. The CPU 71 that executes this program while using the RAM 72 as a work area controls the entire system by outputting various commands to the selector 20, the acoustic mixer 40, and the accompaniment playback device 60.

Next, the operation of this embodiment will be described. The operation of this embodiment can be divided into session preparation processing and session processing.
First, the contents of the session preparation process will be described.
FIG. 5 is a flowchart showing session preparation processing. The process shown in the figure is started when one of the performers instructs the start of performance preparation by operating the mouse 76 of the priority order determination server device 70.

When the start of performance preparation is instructed, the CPU 71 of the priority order determination server device 70 transmits a message requesting transmission of a song name list to the accompaniment playback device 60 (S100).
The CPU 61 of the accompaniment playback device 60 that has received the message reads the song title information and the instrument type information from the header portion 91 of all the song sequence data stored in the song database 66a, respectively. The pair is transmitted to the priority order determination server device 70 (S110).

The CPU 71 of the priority order determination server device 70 displays a performance song selection screen on the computer display 75 based on each pair of song name information and instrument type information received from the accompaniment playback device 60 (S120).
In the upper part of the performance song selection screen, a character string indicating the content “Please select a performance song to be played in this session from the list” is displayed. Below that, a list in which the song names of the performance songs are associated with the instrument types of the musical instruments necessary for the performance of the performance songs is displayed.

The performer who refers to this screen is one of the performance songs in which the session devices 10 of all performers participating in the current session are listed as musical instrument types among the performance songs displayed in the list on the same screen. Select.
When one of the performance songs is selected, the CPU 71 of the priority order determination server device 70 displays a session device connection request screen on the computer display 75 (S130).

FIG. 6 is a session device connection request screen.
In the upper part of this screen, a character string with the content “The music piece has been selected. Connect the session device to the selector and the sound mixer and enter the interface number” is displayed. Below that, the name of the selected performance piece and the musical instrument necessary for the performance are displayed. Further, an input field for inputting the instrument type of the session device 10 connected to each interface is displayed at the lower part of the screen.

Each player who refers to this screen connects each session device 10 to the input interface of the same interface number of the selector 20 and the acoustic mixer 40, respectively. The performer connected to the session device 10 inputs the instrument type in the input field corresponding to the interface number of the input interface to which the session device 10 is connected.
When the instrument type is entered in the input field of the session device connection request screen, the CPU 71 of the priority order determination server device 70 forms a priority order management table in the RAM 72 (S140).

FIG. 7 is a data structure diagram of the priority management table. One record constituting this table has three fields of “interface”, “instrument”, and “rank”. The interface number of each interface to which the session device 10 is connected is stored in the “interface” field. In the “instrument” field, instrument type information indicating the instrument type input on the session device connection request screen is stored. In the “rank” field, rank information indicating priority is stored while session processing described later is performed.
The CPU 71 of the priority order determining server device 70 that has formed the priority order management table displays a mixing ratio setting screen on the computer display 75 (S150).

FIG. 8 is a mixing ratio setting screen.
In the upper part of this screen, a character string indicating the content “Please set the mixing ratio of each priority” is displayed. Below that, an input field for inputting a mixing ratio corresponding to each priority is displayed.
The player who refers to this screen inputs the mixing ratio of each priority in each input field. In order to produce an effect that makes the performance sound of the session device to which a high priority is given more conspicuous, it is desirable to set the content so that the higher the priority, the higher the mixing ratio.

When the mixing ratio is input to all the input fields of the mixing ratio setting screen, the CPU 71 of the priority order determination server device 70 forms a mixing ratio management table in the RAM 72 (S160).
FIG. 9 is a mixing ratio management table. One record constituting this table has two fields of “rank” and “ratio”. The priority is stored in the “rank” field. The “ratio” field stores the mixing ratio input in association with each priority on the mixing ratio setting screen. For example, the priority corresponding to the highest priority “1” is “1: 1.2”, which is the musical tone signal of the session device 10 to which the priority “1” is assigned. Represents that it should be mixed with other musical sound signals after being amplified by 1.2 times.

The CPU 71 of the priority order determination server device 70 that has formed the mixing ratio management table transmits to the accompaniment playback device 60 performance song designation information for designating the performance song selected on the performance song selection screen (S170).
The CPU 61 of the accompaniment playback device 60 reads the music sequence data of the performance music designated by the performance music designation information received from the priority determination server device 70 from the music database 66a (S180).

Subsequently, the CPU 61 secures an area for storing music tone information (hereinafter referred to as “musical tone information storage area”) in the RAM 62, and the music tone information included in the header portion 91 of the music sequence data read in step 180. Is stored in this musical tone information storage area (S190).
The CPU 61 refers to the type type information included in the header part 91 of the music sequence data read in step 180, and determines whether the read music sequence data corresponds to the rank scale fixed type or the rank schedule setting type. (S200).

In step 200, the CPU 61, which is determined to be in the rank schedule fixed type, transmits the priority order transition information included in the production schedule track 94 of the music sequence data to the priority order determination server device 70 (S210).
The CPU 71 of the priority order determination server device 70 stores the priority order transition information transmitted from the accompaniment playback device 60 in the RAM 72 (S220).

On the other hand, in step 200, the CPU 61 of the accompaniment playback device 60 that has been determined to fall under the rank schedule setting type transmits a message for setting the rank schedule to the priority determination server device 70 (S230).
The CPU 71 of the priority order determination server device 70 that has received the message displays a ranking schedule setting screen on the computer display 75 based on the instrument type information transmitted from the accompaniment playback device 60 in step 110 (S240).

A character string indicating the content “Please set the priority schedule to be assigned to each session device.” Is displayed at the top of the order schedule setting screen. Below that, an input field for inputting the priority given to each session device 10 corresponding to the instrument type information received from the accompaniment playback device 60 in time series is displayed.
The performer who refers to this screen inputs the transition of the priority order given to the session device 10 of each performer in the input field of the same screen.
When the priority order transition is input to the order schedule setting screen, the CPU 71 of the priority order determination server device 70 stores the priority order transition information generated based on the input contents in the RAM 72 (S250).
Thus, the session preparation process ends.

FIG. 10 is a flowchart showing session processing. When the start of the session is instructed after the above-described session preparation processing is completed, the accompaniment playback device 60 and the priority order determination server device 70 repeat a series of processing shown in the figure according to a predetermined cycle while synchronizing with each other.
First, the process on the accompaniment playback device 60 will be described. The CPU 61 of the device 60 sequentially reads out the audio data recorded on the accompaniment track 93 of the music sequence data read out in step 180 from the head of the track ( S300).

Subsequently, the CPU 61 determines whether or not the tune change information has been received (S310). When the tune change information is received, the process proceeds to step 320. When the tune change information is not received, the process proceeds to step 330. The tune change information is information for instructing to change the key and tempo of the accompaniment, and is generated on the priority determination server device 70 side. The contents of step 320 will be described after describing the contents of processing on the priority determination server device 70 side, and here, the process proceeds to step 330.
In step 330, the CPU 61 generates a musical tone signal of accompaniment sound based on the audio data read in step 180.

Subsequently, the CPU 61 adjusts the pitch indicated by the musical tone signal generated at step 330 in accordance with the key indicated by the music tone information in the music tone information storage area of the RAM 62, and at the timing according to the tempo indicated by the music tone information, the acoustic mixer 40. (S340).
The musical sound signal of the accompaniment sound output from the accompaniment playback device 60 is input to the speaker 50 via the acoustic mixer 40 and emitted from the speaker 50 as an accompaniment sound.

On the other hand, the processing on the priority determination server device 70 side will be described. The CPU 71 of the device 70 starts counting the elapsed time from the start of the performance at the same time as the accompaniment playback device 60 starts playback (S265).
Subsequently, the CPU 71 acquires the priority order of each musical instrument corresponding to the current elapsed time from the priority order transition information stored in the RAM 72 in step 220 or step 250, and the priority order based on the acquired priority order. The management table is updated (S275).

  As a result of updating in this step, if the priority order transition information has the contents as shown in FIG. 3, it corresponds to “piano” in the priority order management table until 10 seconds have passed since the start of the performance. The stored content of the “rank” field of the record to be changed becomes “1”, and after 10 seconds, the stored content of the “rank” field of the record corresponding to “base” is switched to “1”.

The CPU 71 that has updated the priority management table specifies a record in which the storage content of the “order” field is “1” from among the records of the priority management table, and the “interface” of the specified record. The interface number stored in the field is notified to the selector 20 (S285).
Upon receiving the notification of the interface number, the selector 20 controls its own internal data path so that the tone signal input from the input interface corresponding to the interface number is output from the output interface.
As a result, the musical tone signal input from the session device 10 of the performer having the highest priority among the performers to the selector 20 is input to the tempo / pitch extraction circuit 30 and extracted by the circuit 30. The set pitch and tempo are supplied to the priority determination server device 70.

The CPU 71 of the priority order determination server device 70 analyzes the pitch of a series of performance sounds supplied during a predetermined time length, and specifies the keys to be followed by those performance sounds (S295).
The CPU 71 of the priority order determination server device 70 transmits tune change information representing the tempo supplied from the tempo / pitch extraction circuit 30 and the key specified in step 295 to the accompaniment playback device 60 (S305).

When the tune change information is transmitted to the accompaniment playback device 60, the determination result in step 310 that arrives in the next cycle of the loop executed by the accompaniment playback device 60 is “YES”, and the processing of step 320 is executed. .
In step 320, the CPU 61 of the accompaniment playback device 60 rewrites the content of the tune information stored in the tune information storage area of the RAM 62 in accordance with the tune change information received from the accompaniment playback device 60.

  Here, since the session processing is initially started as a so-called prelude section, the musical sound signal of the performance sound by the session device 10 is not input to the selector 20 and the acoustic mixer 40, and the tempo and pitch indicated by the musical sound signal are used. The obtained tune change information is also not transmitted from the priority determination server device 70 to the accompaniment playback device 60. Therefore, the determination result of step 310 that arrives in each cycle until the music tone change information is transmitted is “NO”, and is stored in the music tone information storage area of the RAM 62 in the same area in step 190 of FIG. The music tone information, that is, the music tone information indicating the standard key and tempo continues to be held. As a result, in step 330, a musical sound signal indicating a performance sound having a pitch according to a standard key is output to the acoustic mixer 40 at a timing according to a standard tempo.

On the other hand, when the prelude section ends and the musical sound signals of the performance sounds of the session devices 10 start to be input to the selector 20 and the acoustic mixer 40, the tempo and pitch indicated by the musical sound signals of the session device 10 having the highest priority among them are displayed. Is changed from the priority determination server device 70 to the accompaniment playback device 60.
Then, the determination result of step 310 that arrives in the subsequent cycle is “YES”, and in the subsequent step 320, the tune information held in the tune information storage area of the RAM 62 indicates the key and tempo indicated by the tune change information. It is rewritten to new tune information. As a result, in step 330 that arrives in the cycle after the tune change information is transmitted, a musical tone signal indicating a performance sound of a pitch according to the same key as the performance by the session device 10 to which the highest priority is given is obtained. , It will be output at the same timing as the performance.

In FIG. 10, the CPU 71 of the priority order determination server device 70 that transmitted the tune change information outputs the mixing ratio control information generated based on the contents of the priority order management table and the mixing ratio management table to the acoustic mixer 40 (S315). .
The mixing ratio control information is information indicating each pair of interface number and mixing ratio. The contents of this step will be specifically described. First, the priority order associated with each interface number of the input interface is acquired from the priority order management table updated in step 275. Subsequently, the mixing ratio set for each priority order is acquired from the mixing ratio management table. Thereafter, the interface number and the mixing ratio associated with the common priority in both tables are output to the acoustic mixer 40 as a pair.

  In the embodiment described above, the key and tempo of the accompaniment sound prepared to reinforce the performance sound of each session device 10 are adjusted according to the performance of the session device 10 having the highest priority. Yes. Therefore, even if the performer of the session device 10 having the highest priority plays a performance location with a key or tempo different from the original one, the key and tempo of the accompaniment follow the improvisational change. It is possible to produce a session that does not impair musical interest.

  In the present embodiment, priority order transition information indicating the transition of the priority order of each performer's session device 10 according to the time series is prepared in advance as a part of the music sequence data. The priority determination server device 70 switches the priority given to each player while sequentially referring to the priority order transition information. In this way, by appropriately switching the priority in conjunction with the progress of the session, it is possible to produce a session that can be satisfied by all the players.

  Furthermore, in the present embodiment, the mixing ratio for each priority order can be arbitrarily set before the session is started, and the musical tone signal input from each session device 10 to the acoustic mixer 40 is set. After being mixed according to the ratio, it is output to the speaker 50. Therefore, the performance of the performer participating in the session can be satisfactorily produced from the viewpoint of volume.

(Second Embodiment)
A second embodiment of the present invention will be described.
In the above embodiment, priority order transition information indicating the transition of the priority order for each musical instrument is recorded in the performance schedule track 94 of the music sequence data or set by the performer, and a session is held. In the meantime, the priority order of each player is switched according to the priority order transition information. On the other hand, in the present embodiment, the priority is switched in consideration of the amount of sweating, which is one of the barometers for measuring the degree of tension of each player.

FIG. 11 is an overall configuration diagram of the accompaniment follow-up system according to the present embodiment. This system includes a sensor 80 in addition to the components shown in FIG.
The sensor 80 is a perspiration sensor and is attached to each player one by one. The sensor 80 detects the sweating amount of each player and supplies the detection result to the priority determination server device 70 as state information.

Next, the operation of this embodiment will be described.
In the present embodiment, the update procedure of the priority management table in the priority determination server device 70 is different from that in the first embodiment. In step 275 shown in FIG. 10, the CPU 71 of the priority order determination server device 70 uses the priority order transition information stored in the RAM 72 in step 220 or step 250, and the priority order of each instrument corresponding to the current elapsed time. And the priority management table is updated based on the acquired priority. In other words, the priority order management table is updated only depending on the priority order transition information.
On the other hand, in this embodiment, after this step 275 is executed, another determination step is inserted. In this determination step, it is determined whether or not the perspiration amount indicated by the state information supplied from each sensor 80 exceeds a predetermined value. Then, in this determination step, when it is determined that the sweating amount indicated by the state information supplied from any of the sensors 80 exceeds a predetermined value, the session device 10 being played by the player wearing the sensor 80. Switch to the highest priority.

  In the embodiment described above, the sensor 80 is attached to each performer, and the priority order is switched in consideration of the detection result of each sensor 80. In this way, by switching the priority in conjunction with the detection result of the sensor 80, the session effect can be further enhanced. In addition, it is possible to suitably produce a session that is performed with vocals or the like where it is difficult to extract the tempo.

(Other embodiments)
The present invention can be modified in various ways.
For example, when a session is performed with a session device 10 such as a lead musical instrument or vocal where it is impossible to extract the tempo and a vocal, etc., performance is performed using a special instrument such as a tap button or a vibration sensor attached to the body or instrument. It is also possible to detect an interval between the user's step and the head and supply the detected interval to the priority determination server device 70 as a tempo.
In the above embodiment, the content of the accompaniment is recorded as audio data on the accompaniment track 93. However, this may be recorded as MIDI data. In other words, the data format is not limited as long as it is musical tone data indicating a series of accompaniment sounds to be an accompaniment.

  In the above-described embodiment, the selector 20 includes a plurality of input interfaces, and a musical tone signal input from one of the input interfaces is output to the pitch / tempo extraction circuit 30 under an instruction from the priority determination server device 70. I was supposed to. On the other hand, the selector 20 has only one input interface, and among the tone signals input from each session device 10 via the input interface, the tone signal of the session device 10 given the highest priority is selected. It may be extracted and output to the pitch / tempo extraction circuit 30. In this modified example, each session device 10 inputs an ID for identifying itself as a pair with a musical sound signal to the selector 20, and the selector 20 specifies the supply source by referring to the ID paired with each musical sound signal. This can be achieved. Similarly, the acoustic mixer 40 does not need to have a plurality of input interfaces, and specifies the source of the musical sound signal input from the only input interface based on the ID paired with those musical sound signals. It is good to do so.

  In the above embodiment, only when the music sequence data read from the music database 66a of the accompaniment playback device 60 is the rank schedule setting type, a message for setting the rank schedule is transmitted to the priority determination server apparatus 70. The performer himself / herself sets priority order transition through the order schedule setting screen displayed on the computer display 75 of the apparatus 70. On the other hand, it is possible to set the transition of the priority order by the player himself regardless of the type of the read music sequence data. In the case of this modification, when the setting is made through the rank schedule setting screen for the music sequence data of the rank schedule fixed type, the setting by the performer has priority over the production schedule track 94.

Although the second embodiment has been described on the assumption that the sensor 80 is a sweat sensor, this may be replaced by a body temperature sensor, an acceleration sensor, or the like. In short, any type of sensor can be used as long as it can quantify and supply some attribute value for measuring the player's degree of tension and appeal.
Further, while the second embodiment is based on the update of the priority management table based on the priority order transition information, the irregular update logic corresponding to the detection result of the sensor 80 is superimposed. A configuration may be adopted in which information is not referred to and a higher priority is given in descending order of the sweating amount indicated by the detection result of the sensor 80.

1 is an overall configuration diagram of an accompaniment follow-up system (first embodiment). It is a hardware block diagram of an accompaniment reproducing | regenerating apparatus. It is a data structure figure of music sequence data. It is a hardware block diagram of a priority determination server apparatus. It is a flowchart which shows a session preparation process. It is a session device connection request screen. It is a data structure figure of a priority management table. It is a mixing ratio setting screen. It is a mixing ratio management table. It is a flowchart which shows a session process. It is a whole block diagram of an accompaniment follow-up system (2nd Embodiment).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Session device, 20 ... Selector, 30 ... Tempo pitch extraction circuit, 40 ... Acoustic mixer, 50 ... Speaker, 60 ... Accompaniment reproduction apparatus, 61, 71 ... CPU, 62, 72 ... RAM, 63, 73 ... ROM, 64, 74 ... communication interface, 65 ... accompaniment sound output interface, 66, 78 ... hard disk, 70 ... priority order determination server device, 75 ... computer display, 76 ... mouse, 77 ... keyboard, 78 ... hard disk, 80 ... sensor

Claims (4)

Input means for inputting performance sounds from a plurality of musical instruments,
An accompaniment storage means for storing musical tone information of a series of accompaniment sounds to be an accompaniment;
Among the musical instruments, a lead musical instrument specifying means for specifying a musical instrument that gives the initiative to play according to a predetermined condition;
Accompaniment output means for generating an accompaniment sound based on the musical tone information stored in the accompaniment music storage means and sequentially outputting the generated accompaniment sound;
Tempo extraction means for extracting the tempo of the performance by the musical instrument from the performance sound input via the input means from the musical instrument identified by the lead musical instrument identification means;
An accompaniment follow-up system comprising: tempo follow-up control means for controlling the tempo of accompaniment sounds sequentially output by the accompaniment song output means so as to coincide with the tempo extracted by the tempo extraction means. The accompaniment follow-up system according to claim 1,
Key extraction means for extracting the key of the performance by the musical instrument identified by the lead instrument identification means from the performance sound;
An accompaniment follow-up system, further comprising a key follow-up control means for controlling the keys of the accompaniment sounds sequentially output by the accompaniment music output means so as to coincide with the keys extracted by the key extractor means. In the accompaniment follow-up system according to claim 1 or 2,
The initiative schedule storage means for storing the transition of the instrument that gives the initiative in association with the elapsed time from the start of performance,
The lead instrument specifying means is:
An accompaniment follow-up system for sequentially specifying musical instruments to be given the initiative according to the stored contents of the initiative schedule storage means. In the accompaniment follow-up system according to any one of claims 1 to 3,
Sensors for detecting the state of each instrument or their performer, respectively,
The lead instrument specifying means is:
An accompaniment follow-up system that identifies an instrument that gives the initiative according to the detection results of the sensors.

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