JP2017151337A - Musical instrument and system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a musical instrument and a system of a simple structure that can match timings of video data and performance data.SOLUTION: A musical instrument 3a generates performance data and transmits performance data to a musical instrument 3b via the Internet 5. When a packet including video data photographing how performance corresponding to the performance data goes on by a communication terminal 4a is received, only delay time is caused and is transmitted to the musical instrument 3b. Thus, the musical instrument 3b can receive the video data whose timing is matched to the performance data in advance. A student B can display to the communication terminal 4b the video data where performance sound by automatic performance based on the performance data performed by the musical instrument 3b matches timing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to musical instruments and systems that handle performance data.

  In Patent Document 1, for example, in a remote lesson using an automatic performance piano, performance data and audio video data are transmitted to the receiving side through different transmission systems, and the performance data and audio video data are synchronized on the receiving side. A playback system is described. Non-Patent Document 1 describes a delay device that outputs an HD-SDI signal that is an uncompressed digital video signal with a delay of about several tens of seconds.

JP-A-2005-84578

Albisque, "HD-SDI delay device DLY-800 / DLY-400", [online], [October 27, 2015 search] Internet <http: // www. alvix. jp / h_products / DLY-800. html>

  In recent years, since the transmission speed of the transmission system has been improved, the time from when audio video data is transmitted to when playback is started on the receiving side has also been shortened. On the other hand, an automatic performance piano controls a solenoid for driving a key based on MIDI performance data and generates a piano sound by striking a string. Since a predetermined time is required to drive the solenoid, a predetermined time is required from the performance data transmission to the start of reproduction on the receiving side, and it is difficult to reduce the time required for driving. For this reason, the time until the playback of the performance data starts longer than the time from when the audio video data and the performance data are transmitted until the playback of the audio video data starts. There was a case.

  Although the system of Patent Document 1 can be synchronized, it is necessary to have a configuration for generating a pulse signal in order to synchronize, and the system may be complicated. In addition, by using the delay device described in Non-Patent Document 1, audio video data can be delayed with respect to performance data and transmitted. However, since the delay device described in Non-Patent Document 1 needs to be connected between an imaging unit such as a video camera and a communication unit that transmits data, for example, there is a possibility that the degree of freedom of the system configuration is reduced. is there.

  The present application has been proposed in view of the above-described problems, and an object thereof is to provide a musical instrument and a system having a simple configuration capable of matching the timing of video data and performance data.

  (1) A musical instrument according to the present invention is a musical instrument that transmits and receives performance data via a network, and that generates first performance data based on the performance, and second performance data different from the first performance data. An automatic performance means for performing an automatic performance based on the performance, and a communication means for transmitting the first performance data and receiving the second performance data via a network, wherein the communication means is a performance corresponding to the first performance data. When a packet including the first data related to the performance data is received, the packet including the first data is transferred to the transmission destination of the first performance data, and the packet reception including the second data related to the performance corresponding to the second performance data is received. In such a case, the packet containing the second data is transferred directly or indirectly to the reproducing means, and the time from the reception of the packet containing the first data to the transmission is determined in the transfer. The transmission is delayed according to the first delay time set for the first time, or the time from reception of the packet containing the second data to transmission is delayed according to the second delay time set in advance. And transmitting at least one of the following.

  When the musical instrument is played by itself, the musical instrument generates first performance data and transmits the first performance data via the network. When a packet corresponding to the first performance data, that is, a packet including data related to the performance performed by itself is received, the packet is delayed by the first delay time and transmitted to the transmission destination of the first performance data. Thereby, the transmission destination can receive the first data whose timing is matched with the first performance data in advance. Here, it is preferable that the transmission destination includes an instrument that performs an automatic performance based on the first performance data and a reproduction unit that reproduces the first data. For example, an operation time of a mechanism such as driving a solenoid is required from when the transmission destination musical instrument receives the first performance data until it makes a sound by automatic performance. For this reason, when the first data is not delayed, the timing of the automatic performance sound may be delayed with respect to the reproduction by the reproduction means of the transmission destination based on the first data. In this respect, since the first data is transmitted with a delay in advance by the musical instrument, the other party can cause the playback means to play back the first data in time with the automatic performance sound based on the first performance data. Here, the first data and the second data may be, for example, video data obtained by shooting a performance, voice data recording a voice of a performer, text data, file data such as an image, and the like. .

  On the other hand, when the second performance data is received from the transmission destination of the first performance data and a packet including the second data related to the performance corresponding to the second performance data is received, the musical instrument receives the second data. It is delayed by two delay times and transmitted to the reproduction means external to the instrument. Thereby, the second data having the timing matched with the second performance data can be transmitted to the reproducing means. For example, when the second data to be received is not delayed in transmission, and when performing an automatic performance based on the second performance data, the operation time of the mechanism is required. Therefore, the timing of the automatic performance sound with respect to the reproduction of the second data May be delayed. Even in this case, since the received second data is delayed and transmitted to the reproduction means, the timing of the automatic performance sound and the reproduction by the reproduction means can be matched. Note that either the first data or the second data may be delayed, or both the first data and the second data may be delayed.

  Since the first data and the second data received by the musical instrument are packetized in advance at the transmission source of the first data and the second data, for example, it is expected to be compressed. In particular, when the first data and the second data are video data, when handling uncompressed video data, it is necessary to provide a processing means with high capability in order to process video data with a large amount of data. . In this respect, since the musical instrument handles packetized data, it is expected that it is not necessary to provide a processing means with high ability.

  As a transmission source of the first data and the second data, for example, a video camera, a smartphone, a tablet terminal, a PC with a built-in camera, a Web camera, or the like may be used. As the reproducing means, for example, a television having a display, a PC, a smartphone, a tablet terminal, or a single display may be used. When the transmission source and reproducing means of the first data and the second data do not have a packet communication function, it is preferable to communicate with the musical instrument via, for example, a PC capable of packet communication. In addition, when transferring a packet, it is preferable that the packet is transferred in accordance with a preset correspondence table of, for example, a transmission source address and a reception destination address. In particular, the configuration (2) described later is preferable. Here, the packet is data in which a header such as a destination address is added to data divided for each predetermined amount of data regardless of the OSI reference model hierarchy.

  (2) Further, the musical instrument has a relay function of transferring a packet received by the communication means in accordance with a destination address included in the packet.

  If the musical instrument has a router function for relaying, for example, a LAN (Local Area Network) and a WAN (Wide Area Network), the step of transferring to the router can be omitted. When the musical instrument has a function of relaying data in the LAN, for example, a bridge, a switch, a switching hub, etc., the step of transmitting to the corresponding bridge, switch, switching hub, etc. can be omitted.

  (3) In addition, the musical instrument includes a receiving unit that receives an adjustment of at least one of the first delay time and the second delay time.

  For example, when the first performance data and the first data are transmitted from the musical instrument to the transmission destination, the communication time from when the musical instrument transmits the first performance data and the first data until the other party receives it is, for example, the communication status of the network Varies depending on In addition, the communication time related to the first performance data may be different from the communication time related to the first data. For this reason, it is necessary to adjust the first delay time every time in order to align the timings of the automatic performance based on the first performance data and the reproduction based on the first data. The user can adjust the delay time via the accepting means according to the changing communication time. Thereby, the timing of 1st performance data and 1st data and the timing of 2nd performance data and 2nd data can be match | combined.

  (4) The system according to the present invention further includes a generating unit that generates performance data based on a performance, and a first communication unit that transmits performance data via a network. When a packet including data related to performance corresponding to the data is received, a transmission side instrument that transmits the packet after receiving the packet after transmission according to a preset delay time, and transmission Automatic performance means for performing an automatic performance based on performance data transmitted from the side musical instrument, and second communication means for receiving a packet transmitted from the transmission side musical instrument and transferring the packet directly or indirectly to the reproduction means. And a receiving instrument.

  The transmission-side instrument transmits performance data, and transmits a packet including the received data to the reception-side instrument with a delay. As a result, the receiving instrument can receive data whose timing is matched with performance data in advance. Here, it is preferable that the receiving-side instrument transfers received data directly or indirectly to the reproducing means. Since the data is transmitted with a delay in advance by the transmitting musical instrument, the receiving musical instrument can transfer data in time with the automatic performance sound based on the performance data to the reproducing means. The user who operates the transmission-side musical instrument can see the reproduction related to the performance in time with the automatic performance sound based on the performance data.

  According to the musical instrument and system according to the present application, it is possible to provide a musical instrument and system with a simple configuration capable of matching the timing of video data and performance data.

It is a figure which shows the structure of a system. It is a figure which shows the electrical structure of a musical instrument and a communication terminal.

  The overall configuration of the system 1 according to the present application will be described with reference to FIG. The system 1 is a system for performing a remote lesson, for example. Here, a case where a lecturer A and a student B conduct a remote lesson will be described as an example. The system 1 includes a musical instrument 3a and a communication terminal 4a operated by the teacher A, and a musical instrument 3b and a communication terminal 4b operated by the student B. The musical instruments 3 a and 3 b have a router function and are connected to the Internet 5. Thereby, performance data to be described later is transmitted and received between the musical instrument 3a and the musical instrument 3b. Furthermore, the musical instrument 3a and the musical instrument 3b have an access point function, and are connected to the communication terminals 4a and 4b via a wireless LAN such as WiFi (registered trademark), for example. Thereby, transmission / reception of call data, which will be described later, including video and audio is performed between the communication terminal 4a and the communication terminal 4b via the musical instruments 3a and 3b. Specifically, performance data and call data are packetized and transmitted / received. Since the musical instrument 3a and the musical instrument 3b have the same configuration, and the communication terminal 4a and the communication terminal 4b have the same configuration, the configuration of the musical instrument 3a and the communication terminal 4a will be described below. When there is no need to distinguish between the musical instrument 3a and the musical instrument 3b, they are collectively referred to as the musical instrument 3. Similarly, when it is not necessary to distinguish, the communication terminal 4a and the communication terminal 4b are collectively referred to as the communication terminal 4.

  The musical instrument 3a has a CPU 31, ROM 32, RAM 33, and buffer 34 that are connected to each other via a bus 39 shown in FIG. 2 in addition to the configuration of a general acoustic piano such as a keyboard, a hammer, a string, and a board not shown. , Sensor 35, drive unit 36, user interface 37, communication interface 38, and the like. The CPU 31 controls each unit connected to the CPU 31 by executing various programs stored in the ROM 32. The RAM 33 is used as a main storage device for the CPU 31 to execute various processes.

  The sensor 35 detects movements of the keyboard and pedals in order to generate performance data in the MIDI (Musical Instrument Digital Interface: registered trademark) format, and transmits the detected signal to the CPU 31. The CPU 31 generates performance data in MIDI format based on the received detection signal. For example, when the key of the musical instrument 3a is pressed, the sensor 35 detects the speed at which the key is pressed, and the CPU 31, for example, the note number corresponding to the pressed key, the velocity corresponding to the keyed operation, etc. A note-on message is generated with the information on the performance action of. Further, for example, when the musical instrument 3a is released, the CPU 31 generates a note-off message. The CPU 31 generates performance data including a note-on message, a note-off message, and the like. Hereinafter, the performance data refers to MIDI format data.

  The drive unit 36 includes a solenoid that drives a keyboard and the like. The CPU 31 controls the drive unit 36 based on performance data, for example. Thereby, the musical instrument 3a can perform an automatic performance. For example, in response to the note-on message of the performance data, the drive unit 36 causes the drive current corresponding to the velocity to flow to the solenoid corresponding to the key corresponding to the note number, and moves the key. As a result, the hammer vibrates the string, and sound is emitted from the musical instrument 3a.

  The user interface 37 includes a power button and a dial that accepts an input of a delay time described later, for example. The communication interface 38 has an antenna and a WAN port (not shown). The communication interface 38 is connected to the Internet 5 via a WAN port. In addition, the communication interface 38 performs demodulation of radio waves transmitted and received via the antenna. Thereby, the musical instrument 3a can perform wireless communication with the communication terminal 4a, for example. The buffer 34 temporarily stores, for example, a packet including call data transmitted from the communication terminal 4a. The CPU 31 buffers the received packet in the buffer 34, delays it by the set delay time, and transmits it from the communication interface 38.

  The musical instrument 3a has a router function. Specifically, the packet is relayed in the third layer in the OSI reference model. The CPU 31 has a NAT (Network Address Translation) function, performs conversion between a global IP address and a private IP address for a source or destination IP address included in a relay packet received via the communication interface 38, The data is transmitted via the communication interface 38. As a result, the musical instrument 3a transfers the received packet addressed to the communication terminal 4a to the communication terminal 4a and transfers the packet addressed to the communication terminal 4b transmitted from the communication terminal 4a. In addition, when the performance data is transmitted via the communication interface 38, the CPU 31 performs a packetizing process. Specifically, the performance data is divided and a header is added to generate a packet. Further, when the CPU 31 receives a packet including performance data via the communication interface 38, the CPU 31 extracts the performance data included in the packet and transmits it to the drive unit 36. Thereby, the musical instrument 3a can packetize performance data and transmit it, and can perform automatically according to the packet containing the received performance data.

  The communication terminal 4a is, for example, a tablet terminal such as iPad (registered trademark), a smartphone, or the like, and the CPU 41, ROM 42, RAM 43, communication interface 44, camera 45, microphone 46, speaker 47, and A touch panel 48 is provided. The CPU 41 controls each unit connected to the CPU 41 by executing various programs stored in the ROM 42. The RAM 43 is used as a main storage device for the CPU 41 to execute various processes. The communication interface 44 has an antenna (not shown) and performs double modulation of radio waves transmitted and received through the antenna.

  The communication terminal 4a is installed at a position where the camera 45 can photograph the hand of the lecturer A. Thereby, the camera 45 can image the state of the fingering of the instructor A who is playing. The microphone 46 collects the speech of the lecturer A and the performance sound. The speaker 47 emits sound according to the audio data. The touch panel 48 displays according to the video data. The touch panel 48 displays an operation screen, for example, and accepts an instruction input from the user by an operation such as a tap. As the communication terminal 4a, for example, a call service with an image via the Internet 5, such as Skype (registered trademark), a so-called videophone can be used. Specifically, a videophone application is installed in the communication terminal 4a. During the period when the communication terminal 4a is using the videophone, the CPU 41 generates packetized call data based on the video acquired by the camera 45 and the audio acquired by the microphone 46 according to the application, and transmits it via the communication interface 44. To do. When a packet containing call data is received, video data and audio data are extracted from the packet and transmitted to the touch panel 48 and the speaker 47, respectively.

  Next, the operation of the system 1 will be described. Instructor A and student B turn on the power of musical instruments 3a and 3b, respectively, and activate musical instruments 3a and 3b. As a result, the router function of the musical instruments 3a and 3b becomes effective, and performance data can be transmitted and received between the musical instruments 3a and 3b. In addition, for example, the instructor A makes the videophone of the communication terminal 4a available and requests communication to the student B, and the instructor A and the student B use the communication terminals 4a and 4b, respectively, to make a callable state. . Accordingly, the communication terminals 4a and 4b can transmit and receive call data via the Internet 5 using the musical instruments 3a and 3b as routers, respectively. On the touch panel 48 of the communication terminal 4a operated by the teacher A, an image at hand of the student B is displayed, and the voice and performance sound of the student B are emitted from the speaker 47. Similarly, the image at hand of the teacher A is displayed on the touch panel 48 of the communication terminal 4 b operated by the student B, and the voice and performance sound of the teacher A are emitted from the speaker 47.

  Next, in order to synchronize the timing of the automatic performance based on the performance data and the display image based on the call data, first, the lecturer A performs with the musical instrument 3a and adjusts the delay time in the musical instrument 3a. The instructor A sets the musical instrument 3a so that a sound is produced as the keyboard is operated, and performance data is generated and transmitted to the musical instrument 3b. On the other hand, the musical instrument 3b is set to perform automatically according to the received performance data. Thereby, the performance performed with the musical instrument 3a is reproduced with the musical instrument 3b. In parallel, the state of fingering of the teacher A is displayed on the touch panel 48 of the communication terminal 4b of the student B. The student B compares the automatic performance sound with the display image and instructs the teacher A to adjust the delay time. For example, the delay time is set in advance at the time of shipment of the musical instrument 3, and the delay time is set to the initial value after the power is turned on.

  From the time when performance data is transmitted from the musical instrument 3a to the time when a sound is produced by the musical instrument 3b, it mainly takes time to communicate via the Internet 5 and to operate the drive unit 36 of the musical instrument 3b. On the other hand, it takes time to communicate mainly via the Internet 5 from when the call data is transmitted by the musical instrument 3a to when the communication terminal 4b displays and emits sound according to the call data. In recent years, communication time required for communication via the Internet 5 related to performance data and communication time related to call data have been shortened in recent years, for example, due to an improvement in communication speed. On the other hand, it is difficult to shorten the operation time required for the operation of the drive unit 36. In order to shorten the time during which the drive unit 36 operates, it is necessary to move the keyboard quickly. This is because the performance cannot be reproduced if the keyboard 3 is moved uniformly fast in the musical instrument 3 that produces sound according to the speed of the keyboard movement. For this reason, especially when the communication time is short, it may take more time for the sound to be emitted by the musical instrument 3b than when the communication terminal 4b displays and emits sound according to the call data.

  Although the communication time varies depending on the communication status of the Internet 5, etc., the time from when the sound is emitted from the musical instrument 3a to when the sound is emitted from the musical instrument 3b is about 250 ms, for example, while the sound is emitted from the musical instrument 3a. The time until the display / sound is displayed on the communication terminal 4b may be shorter than 250 ms. In this case, the automatic performance is performed later than the image displayed on the touch panel 48 of the communication terminal 4b. If the timing of the image displayed on the touch panel 48 and the automatic performance sound does not match, it becomes difficult to accurately grasp the performance, and there is a possibility that the lesson may be hindered. For this reason, it is necessary to synchronize the timing of the image and the automatic performance. Therefore, by transmitting the call data with the delay in accordance with the delay time in advance by the transmission source musical instrument 3a, the reception destination musical instrument 3b can receive performance data and call data in time. Since the communication time fluctuates, the delay time set to the initial value is adjusted by comparing the automatic performance sound and the display image at the start of the lesson. The delay time is, for example, about 10 to 100 ms.

  Student B gives an instruction to increase the delay time when the timing of the automatic performance sound is late with respect to the display image, and shortens the delay time when the timing of the automatic performance sound is early with respect to the display image. To instruct. The instructor A adjusts the delay time with the dial of the user interface 37 based on the instruction from the student B, and plays again. If necessary, the timing of the automatic performance and the image display can be matched by repeating the adjustment of the performance and the delay time. Similarly, the delay time of the musical instrument 3b of the student B is adjusted, and the timing of automatic performance and image display is matched. When the adjustment with the musical instruments 3a and 3b is completed, the lesson A and the student B start a remote lesson.

  The communication terminal 4 encodes / compresses audio / video data according to a videophone application, packetizes it, and transmits it to the musical instrument 3. For this reason, the musical instrument 3 receives a packet containing already compressed audio / video data. The musical instrument 3 only needs to perform a simple process of buffering the received packet and transmitting it with a delay of a set delay time. For example, a video camera can be connected to the musical instrument 3 instead of the communication terminal 4a. Specifically, the musical instrument 3 acquires audio / video captured by the video camera via a cable. In this case, however, the musical instrument 3 needs to process uncompressed audio / video data with a large amount of data, and a CPU having a high processing speed is required for compression. Similarly, instead of the communication terminal 4a, the display can be connected to the musical instrument 3. In this case, it is necessary to extract and restore the video data from the received packet. On the other hand, in the configuration of the system 1, the musical instrument 3 does not need to compress / decompress video data. It is not necessary to provide a CPU, RAM, etc. with high processing capability.

  Here, the CPU 31 is an example of a generation unit, the drive unit 36 is an example of an automatic performance unit, and the communication interface 38 is an example of a communication unit. The router function is an example of a relay function. The user interface 37 is an example of a reception unit. Video data is an example of first data and second data related to performance. The communication terminal 4 is an example of a reproducing unit.

  According to the first embodiment described above, the following effects are obtained.

  The musical instrument 3a generates performance data and transmits the performance data to the musical instrument 3b via the Internet 5. When a packet including video data captured by the communication terminal 4a is received for the performance corresponding to the performance data, it is delayed by a delay time and transmitted to the musical instrument 3b. As a result, the musical instrument 3b can receive video data whose timing is matched with performance data in advance. The student B can display on the communication terminal 4b video data in time with the performance sound by the automatic performance based on the performance data performed by the musical instrument 3b.

  Since the video data received by the musical instrument 3a is previously packetized by the communication terminal 4a, it is compressed. For this reason, since the musical instrument 3a handles packetized video data, it is not necessary to provide a processing means with high capability. Moreover, since the musical instrument 3a has a router function, the step of transferring to the router can be omitted. Also, the user can adjust the delay time each time via the user interface 37 according to the changing communication time.

  Next, a modification of the embodiment will be described. In the above description, it has been described that the musical instrument 3a transmits the packet received from the communication terminal 4a to the communication terminal 4b with a delay. In addition to this, the musical instrument 3a may be configured to delay the packet received from the communication terminal 4b and transmit it to the communication terminal 4a. For example, the instructor A sets the musical instrument 3a to increase the delay time when the automatic performance sound is slow with respect to the display image, and shortens the delay time when the automatic performance sound is early with respect to the display image. The musical instrument 3a is set as follows. Thereby, not only the transmission side but also the reception side can perform an operation for adjusting the timing.

Needless to say, the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention.
In the above description, for example, when the musical instrument 3a is a call data transmission source, the call data is delayed by the transmission source musical instrument 3a, or the call data is delayed by both the transmission source musical instrument 3a and the reception destination musical instrument 3b. However, the configuration may be such that the call data is delayed and transmitted to the communication terminal only at the receiver. As long as at least one of the transmission source and the reception destination is delayed, the timing of the performance data and the call data can be matched.

  The musical instruments 3a and 3b have been described as having a router function. However, the system 1 includes a router function instead of the router function, for example, a bridge function, a switch function, a switching hub function, a proxy server function, and the like. It is also good. In addition, the musical instruments 3a and 3b and the communication terminals 4a and 4b have been described as being connected by a wireless LAN, but the present invention is not limited to this, and a configuration in which the musical instruments 3a and 3b are connected by a wired LAN is also possible.

  Moreover, although the communication terminal 4 was illustrated as a transmission source and transmission destination of a packet, and a reproduction | regeneration means above, it is not limited to the communication terminal 4. FIG. As the reproducing means, for example, a television having a display or a single display may be used. Among these, even if the reproducing means does not have a packet communication function, such as a video camera or a television, the musical instrument 3 can be configured by using a configuration such as a PC that can perform packet communication with the musical instrument 3. Packetized call data can be received.

  In addition, although it has been described that the delay time is set to the initial value in a state where the power source of the musical instrument 3 is turned on, the present invention is not limited to this. For example, when the power of the musical instrument 3 is turned off, the delay time may be stored, and the stored delay time may be read after being turned on and set as a set value. Alternatively, for example, the correspondence between the address of the musical instrument 3 associated with the transmission destination and the delay time is stored as a history, and when there is a history, that is, the previously used delay time is set for a partner who has transmitted in the past. It is good also as a structure made into a value.

  In addition, although it has been described that the communication terminal uses the Skype to talk, the present invention is not limited to this. For example, another communication service such as FaceTime (registered trademark) may be used.

  In addition, although it has been described that the delay time is input by the dial provided in the user interface 37, the present invention is not limited to this, and a configuration may be adopted in which the input is performed by, for example, a communication terminal in which an attached remote controller or controller application is installed.

  Moreover, although the musical instrument 3a was provided with CPU31, and CPU31 performed each process, such as the production | generation of performance data, packetization, etc., it was not limited to this. For example, a DSP (Digital Signal Processor), a PLD (Programmable Logic Device), and the like may be provided, and for example, the processing may be performed in cooperation. Although the buffer 34 is described as being provided, the call data may be temporarily stored in the RAM 33 without the buffer 34 being provided.

  Further, although video data is exemplified as data related to performance data, the type of data included in the packet is not limited. The data may be voice data, text data, file data, or the like, for example.

1 System 3a, 3b Musical instrument 4a, 4b Communication terminal 5 Internet 31 CPU
34 buffer 35 sensor 36 drive unit 37 user interface 38 communication interface 45 camera 46 microphone 47 speaker 48 touch panel

Claims (4)

An instrument that transmits and receives performance data over a network,
Generating means for generating first performance data based on performance;
Automatic performance means for performing automatic performance based on second performance data different from the first performance data;
Communication means for transmitting the first performance data and receiving the second performance data via the network,
The communication means includes
When a packet including first data related to a performance corresponding to the first performance data is received, the packet including the first data is transferred to a transmission destination of the first performance data;
If a packet containing second data related to a performance corresponding to the second performance data is received, the packet containing the second data is transferred directly or indirectly to the reproduction means;
In the transfer,
Transmitting a time from reception of a packet containing the first data to transmission after delaying according to a preset first delay time, or receiving of a packet containing the second data A musical instrument characterized by performing at least one of transmission after delaying according to a preset second delay time.   The musical instrument according to claim 1, wherein the musical instrument has a relay function of transferring the packet received by the communication unit according to a destination address included in the packet. The instrument is
The musical instrument according to claim 1, further comprising a reception unit that receives an adjustment of at least one of the first delay time and the second delay time. Generating means for generating performance data based on the performance;
First communication means for transmitting the performance data via a network,
The first communication means includes
When a packet including data related to the performance corresponding to the performance data is received, a transmission-side instrument that transmits the packet after receiving the packet after transmission according to a preset delay time When,
Automatic performance means for performing an automatic performance based on the performance data transmitted from the transmitting instrument;
A second communication unit that receives the packet transmitted from the transmission instrument and directly or indirectly transfers the packet to the reproduction unit;
Including system.

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