JP2003208162A - Electronic musical instrument, performance data transfer controller, performance data obtaining program, and performance data transfer control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent illegal flow out of performance data distributed from a server 4. <P>SOLUTION: An electronic organ 1 is connected with a personal computer 2 through an MIDI cable. The computer 2 is connected to the server 4 through a communication network 3. A control program is downloaded from the server 4 to the computer 2. The organ 1 is set to be in a trial listening mode by the operation of the computer 2. To the organ 1, it is prohibited to externally output data in a temporary storage part in the trial listening mode. The performance data first-encoded by the server 4 is distributed to the computer 2 and decoded there. A key is generated by the organ 1, and the performance data is second-decoded by the computer 2 on the basis of the key and transferred to the organ 1. When trial listening is finished by the organ 1, the trial listening mode is released and the data in the temporary storage part is deleted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument capable of automatically performing performances based on performance data, a performance data transfer control device for transferring performance data to the electronic musical instrument using a network, and a performance data acquisition program. It also relates to a performance data transfer control program.

[0002]

2. Description of the Related Art Conventionally, in the fields of electronic musical instruments, computer music, etc., there is a service for distributing performance data used for automatic performance and the like through a network. For example, it is possible to receive performance data from a server for a fee using a personal computer or the like on the Internet, and take the performance data into an electronic musical instrument connected to the personal computer. The electronic musical instrument performs various performances or various processes based on the captured performance data. It should be noted that the performance data for trial listening can be previewed before purchasing the performance data.

[0003]

However, since the electronic musical instrument itself functions independently of the network, it can be operated normally even when connected to a computer. Data can be easily copied by editing it in an electronic musical instrument or transferring it separately to a recording medium. Therefore, the performance data for trial listening may be illegally used, and there is a problem from the viewpoint of protecting the copyright of the performance data.

An object of the present invention is to prevent the performance data used only for trial listening from being output to the outside so that the performance data cannot be illegally handled.

[0005]

An electronic musical instrument according to claim 1,
A function to set a listening mode that prohibits the operation of outputting data from the temporary storage area to the outside in response to a setting instruction from an external device, and a performance data for listening to which the performance data for listening is received from an external device. Is recorded in the temporary storage area, and a function of erasing the trial performance data recorded in the temporary storage area when the preview mode is released is provided. The cancellation of the trial listening mode may be performed by an instruction from an external device, or may be performed by an operation instruction in the electronic musical instrument.

According to the electronic musical instrument of claim 1 configured as described above, when a setting instruction is received from an external device such as a personal computer, a preview mode for prohibiting the operation of outputting the data from the temporary storage area to the outside is set. Set. Also,
Upon receiving the input of the performance data for trial listening from the personal computer or the like, the performance data for trial listening is recorded in the temporary storage area. Therefore, in the trial listening mode, the trial listening performance data recorded in the temporary storage area can be listened to, but the trial listening performance data cannot be output to the outside. Also, when the trial listening mode is canceled by a cancel instruction from the personal computer or a cancel operation on the electronic musical instrument itself, the trial performance data recorded in the temporary storage area is forcibly erased. It is possible to reliably prevent the performance data from leaking.

According to a second aspect of the present invention, there is provided a performance data transfer control device, which has a function of sending a setting instruction of the trial listening mode to an external device when the start of the trial listening mode is instructed, and the performance data for trial listening after the setting instruction is sent to the outside. It is characterized by having a function of sending to a device and a function of sending an instruction to cancel the trial listening mode to the external device when an instruction to end the trial listening mode is given.

The performance data transfer control device according to the second aspect of the present invention configured as described above comprises, for example, a personal computer connected to a network, receives performance data for trial listening via the network, and is externally input or the like. When the start of the trial listening mode is instructed, a trial listening mode setting instruction is sent to an external device such as an electronic musical instrument, and further, after the setting instruction is sent, the trial listening performance data is sent to the electronic musical instrument or the like. When the end of the audition mode is instructed by an external input or the like, an instruction to cancel the audition mode is sent to the electronic musical instrument or the like. Therefore, it is suitable for controlling the electronic musical instrument of the first aspect.

That is, the external device according to claim 1 and the performance data transfer control device according to claim 2 may be a personal computer, and the external device according to claim 2 may be an electronic musical instrument or the like. Upon receiving the desired performance data for trial listening from the system, the performance data for trial listening is sent to the electronic musical instrument. At this time,
By operating the personal computer, it is possible to instruct setting and cancellation of the audition mode of the electronic musical instrument. Further, the performance data transfer control device according to the second aspect may be configured by a server which is connected to a network and distributes the performance data for trial listening. In this case, an electronic musical instrument or the like may be directly connected to the network.

A performance data acquisition program according to claim 3 is
A process for receiving a setting instruction from an external device and for setting an operation mode for prohibiting the operation of outputting the data from the temporary storage area to the outside, and receiving the performance data for the audition from the external device and performing the performance for the audition. The data is recorded in a temporary storage area and the processing for erasing the trial performance data recorded in the temporary storage area when the trial mode is released is executed by a computer. By executing the acquisition program, the same operational effect as that of the first aspect can be obtained.

According to a fourth aspect of the present invention, there is provided a performance data transfer control program, wherein when a start of the trial listening mode is instructed, a process of sending a trial listening mode setting instruction to an external device, and after sending the setting instruction, the trial listening performance data is transmitted to the external device. This is for causing the computer to execute the processing of sending to the device and the processing of sending the instruction to cancel the audition mode to the external device when the end of the audition mode is instructed. For example, the same effect as that of claim 2 can be obtained.

[0012]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of an entire system according to an embodiment of the present invention.
The electronic musical instrument is an electronic organ (for example, "Electone (registered trademark)"). In the figure, the personal computer is abbreviated as “PC” and the electronic organ is abbreviated as “EL”. The electronic organ 1 is a personal computer 2 as a performance data transfer control device.
Is connected with a MIDI cable. The personal computer 2 is also connected to a server 4 (the computer) via a communication network 3 such as the Internet.

<Performance Data> The computer of the server 4 has a database, and stores “purchase performance data” and “listening performance data” corresponding to each of a large number of music pieces. Performance data for purchase and performance data for trial listening (hereinafter collectively referred to as "performance data")
Includes "playback mode data" and "music data".

The reproduction mode data is “registration”.
Alternatively, the data is referred to as “resist”.
As shown in (A), for example, data that specifies the tone of the first keyboard (lower keyboard) of the electronic organ 1, data that specifies the effect of the first keyboard, and tone of the second keyboard (upper keyboard) are specified. The data is data that determines various settings such as the tone color and effect of the electronic organ 1, such as data and data that specifies effects on the second keyboard. And
This reproduction mode data is assigned to a registration switch provided on the operation panel when used in the electronic organ 1, and by operating the registration switch, the electronic organ 1 is changed to a mode according to the assigned reproduction mode data. Is set.

Also, a plurality of reproduction mode data corresponding to the flow of music is often used as a set for each music.
In this case, each reproduction mode data is assigned to a plurality of registration switches. Therefore, for example, by operating the registration switch during the keyboard performance (manual performance), it is possible to change the mode such as the tone color or effect in the middle of the music according to the flow of the music. Furthermore, in automatic performance,
It is also possible to switch the reproduction mode data according to the instruction data recorded in the performance data, and automatically switch the timbre or effect according to the flow of the automatic performance.

The music data is, for example, data called "song". As shown in FIG. 2 (B), music event data (MIDI event data) corresponding to one music sound is used as a performance timing. I remember along. Further, as described above, it also includes data instructing the reproduction mode data set when the music is reproduced.

There are some songs in which the purchase performance data and the trial listening performance data have both the reproduction mode data and the music data, and some songs have only one of them. For example, there is a piece of music data that is included only in the performance data for trial listening. In this case, only the reproduction mode data (registration) is purchased from the performance data for purchase, and the actual performance of the music is a keyboard performance, etc. This is what you do. Also, some songs have only the playing mode data for trial listening, and in this case, the playing mode is auditioned by setting the playing mode data and playing the keyboard. Furthermore, the reproduction mode data of the performance data for trial listening is
It may be the same as the reproduction mode data of the purchase performance data, or may be partially omitted from the reproduction mode data of the purchase performance data.

<Hardware Configuration> The electronic organ 1 and the personal computer 2 each have a basic configuration of a microcomputer including a CPU, an input / output device, a storage device, and the like. The essential part of the configuration is shown in the common block diagram of FIG. CPU 10a
Executes the control program stored in the ROM 10b, the RAM 10c, or the external storage device 10d to realize the functions of the electronic organ 1 and the personal computer 2.
The timer 10e takes control timing and generates a reproduction clock and the like for automatic performance. The MIDI interface (I / F) 10f transmits / receives a MIDI signal to / from an external MIDI device 10g. When the block diagram is the electronic organ 1, the MIDI device 10g corresponds to the personal computer 2, and when the block diagram is the personal computer 2, the MIDI device 10g corresponds to the electronic organ 1.

In the case of the electronic organ 1, specific examples of each element are as follows. The external storage device 10d is an FDD (floppy (trademark) disk drive) in this embodiment.
The performance data for purchase purchased after receiving the distribution is stored in the floppy disk as a storage unit. The operator 10h is a keyboard (lower keyboard, upper keyboard, pedal keyboard), a foot switch, a switch of an operation panel, or the like, and various operations are detected by the detection circuit 10i. The display unit 10j is a liquid crystal display or the like provided on the operation panel, and is driven via the display circuit 10k.

The tone generator circuit 10m generates musical tone signals corresponding to the operation of various keyboards of the electronic organ 1 according to the set tone color, and the sound system 10 such as an amplifier or a speaker.
It is output to n to generate a musical sound. When performing an automatic performance based on the music data, the interrupt processing by the timer 10e is performed, the data of various notes in the music data is reproduced, and note code, touch data, note-on / note-off, etc. are generated by the sound source circuit 10m. To generate a musical sound. A control program (a performance data acquisition program on the electronic musical instrument side) is stored in the ROM 10b. The electronic organ 1 alone can be connected to the communication network 3 via the communication interface 10p.

In the case of the personal computer 2, specific examples of each element are as follows. The external storage device 10d is an HDD (hard disk drive), FDD, CD-R.
An OM (compact disc-read only memory) device, a magneto-optical disc (MO) device, a digital multipurpose disc (DVD) device, etc., and a control program (performance data transfer control program) from the server 4 to the external storage device 10d. Downloaded to. The operator 10h is a keyboard, a mouse, or the like, and the detection circuit 10h
Various operations are detected by i. The display unit 10j is a liquid crystal display, a CRT display or the like, and has a display circuit 10k.
Is driven via the screen to display an initial screen and a trial listening screen, which will be described later, when the performance data is purchased. Further, the server 4 is connected via the communication interface 10p and the communication network 3.
Data is exchanged with the electronic organ 1 (MI
Receive the performance data distribution service used by the DI device 10g).

<Outline of Operation and Process> FIG. 5 is a diagram conceptually showing the outline of the operation and the flow of data and instructions in the embodiment, and the outline of the operation and process in the embodiment will be described. The server 4 is a site that provides performance data. When the server 4 is accessed using the browser of the personal computer 2, the site is launched by the server 4 and the site is presented to the personal computer 2. The transfer control program is downloaded. At the same time, the HTML file data for screen display is distributed. As a result, the personal computer 2 displays the initial screen shown in FIG. Then, while accessing the server 4, the operators (screen switches) SW1, SW2, SW3 of this initial screen
Can be operated with a mouse or the like to perform a trial listening operation, a purchasing operation, and a confirming operation.

Then, when a desired song is selected on the initial screen and a request for trial listening is transmitted to the server 4, the server 4 sends HTML.
File data is sent and personal computer 2
The preview screen of Fig. 4 (B) is displayed on the screen. In addition, the performance data for trial listening encrypted (first encryption) is sent from the server 4 to the personal computer 2. The personal computer 2 decodes this (first decoding), sends an instruction to the electronic organ 1 to fix the electronic organ 1 in the audition mode, and sends the performance data for audition sent to the electronic organ 1 later. Set so that it cannot be output to the outside.

The electronic organ 1 generates a key for re-encryption, and the personal computer 2 newly encrypts the trial performance data based on the key (second encryption). Then, the encrypted data is included in the exclusive data of the MIDI standard and sent to the electronic organ 1, and the electronic organ 1 extracts the encrypted data from the received exclusive data and decrypts it based on the key ( 2 decoding) to obtain performance data for trial listening. The first encryption method and the second encryption method are different. Each method uses two data different in data communication standard between the server 4 and the personal computer 2 (data format of data to be transmitted) and data communication standard between the personal computer 2 and the electronic organ 1. It is suitable for each communication standard. The performance data encrypted by the first encryption is in a data format that allows communication between the server 4 and the personal computer 2, and the performance data encrypted by the second encryption is the personal computer 2 and the electronic organ 1. It is a data format that can be communicated between.

As described above, the electronic organ 1 can perform an automatic performance or a keyboard performance (that is, a reproduction mode of the audition) based on the audition performance data. Then, when the trial listening is finished, when the operator SW4 of the finish is operated on the trial listening screen of the personal computer 2, the personal computer 2 sends the electronic organ 1 an instruction to cancel the mode. As a result, the electronic organ 1 erases the stored trial-listening performance data, enables external output of other data, and releases the trial-listening mode.

When the performance data is purchased after the above-mentioned trial listening, a song (for example, a trial listened song) is selected on the initial screen and the purchase request is transmitted to the server 4, and the server 4 performs the process of charging and the purchase. The performance data is encrypted (first encryption) and transmitted to the personal computer 2, and the personal computer 2 decrypts it (first decryption). Then, the personal computer 2 confirms with the electronic organ 1 whether the floppy disk is ready. In response to this, the electronic organ 1 formats the floppy disk and secures an empty area, if necessary, and outputs the result (status information) to the personal computer 2.
To send. Then, when a free area is secured in the formatted floppy disk, the personal computer 2 starts the operation of transmitting the performance data for purchase.

The operation of transmitting the purchase performance data is as follows.
The electronic organ 1 is the same as the case of the performance data for trial listening.
A mode fixing instruction for the key, generation of a key in the electronic organ 1, re-encryption (second encryption) and MIDI processing in the personal computer 2, electronic organ 1
The decryption process is performed. And electronic organ 1
The performance data for purchase that was decrypted at is written in the storage unit (floppy disk) and protected.
After that, as in the case of the performance data for trial listening, the mode-fixed state of the electronic organ 1 is released.

<Second Encryption> FIG. 6 is a diagram showing the concept of the second encryption performed by the personal computer 2.
As shown in (I), the performance data for one file (one song) distributed and decrypted from the server 4 is in the MIDI format or the like, and predetermined event data for playing the song is stored in order. It is a thing. Each circle of (I) represents each event data (timing data, MIDI event data, etc.), and each data is stored in the processing order. The original performance data cannot be reproduced by a normal reading method (a method of reading the bit string sequentially from the beginning of the file and reading the data) using the key for receiving the data string of one file of (I) from the electronic organ 1. Converting into a data string (re-encryption) and processing the converted data string into a data format that can be sent to the electronic organ 1 (MIDI conversion) is called second encryption.

As the conversion method, there is a method of converting the data string (I) into a new data string by shifting the data string (bit string) forward or backward by the amount indicated by the key received from the electronic organ 1 in bit units. (The first data is moved to the end, the last data is moved to the beginning.) Of the data strings in (I), the key represents the data string (bit string) represented by the key received from the electronic organ 1. There is a method of converting into a new data string by replacing them in order. The data string of (I) whose contents are corrupted by these conversion methods is (II)
As described above, there is a list of broken data in which the original performance data cannot be reproduced by the normal reading method.

Then, as shown in (III), the data string of (II) is sequentially extracted from the beginning by a predetermined length (a predetermined number of bits), and the extracted data and a number indicating the extraction order. The electronic organ 1 is processed into exclusive data (representing MIDI standard system exclusive message data) having the message content of
Sent to. This creation and transmission process is repeated until all the data is extracted from the data string of (II).
The electronic organ 1 restores the data received from the personal computer 2 to the original performance data by the reverse procedure (second decoding).

Note that the second encrypted data is encrypted as being matched with a transmission path independent from the transmission path by the communication network 3 between the personal computer 2 and the server 4. That is, each of the encrypted data is embedded in the exclusive data of the MIDI standard, and is the data that matches the transmission path of the MIDI cable between the electronic organ 1 and the personal computer 2.

<Trial listening operation> FIG. 7 shows the server 4 and the personal computer 2 when performing the trial listening operation in the embodiment.
3 is a diagram showing a processing procedure of the electronic organ 1. FIG. In addition,
The following trial listening operation, purchase operation described later, and processing shown in each flowchart described later correspond to the “performance data transfer control program” in the personal computer 2 and the “performance data acquisition program” in the electronic organ 1.

Before the processing of FIG. 7, the personal computer 2 is connected to the server 4 via the communication network 3. The personal computer 2 has a server 4
The performance data transfer control program has been downloaded from, and the initial screen (Fig. 4 (A)) is displayed.

First, a music list N (see FIG. 4) is displayed on the initial screen.
(A)) is displayed, the desired song is selected, and the operator SW2 for trial listening is operated to request the trial listening from the personal computer 2 to the server 4 (step A in FIG. 7).
1). As a result, the server 4 reads out the trial performance data of the requested music from the database,
The performance data for trial listening in the I format is encrypted (first encryption) under a predetermined condition and sent to the personal computer 2 (step A2). The first encryption is the same as the conventional technique, and the data after the encryption is in a format that can be transmitted through the line of the communication network 3. Further, the server 4 also transmits an HTML file for displaying a preview screen.

Next, in the personal computer 2, H
A preview screen (FIG. 4 (B)) is displayed based on the TML file (step A3), and the data transmitted from the server 4 is decoded into MIDI-format performance data for preview (first decoding) (step A4). ). Then, an instruction for fixing the mode is sent to the electronic organ 1 (step A5).

In response to an instruction from the personal computer 2, the electronic organ 1 performs a mode-fixing process, which will be described later with reference to FIG. 8, and sets so that the performance data for trial listening received thereafter cannot be output to the outside ( Step A
6). Next, the key generation process shown in FIG. 9 is performed to newly generate a key for encrypting the trial listening performance data supplied from the personal computer 2 (second encryption),
The key is sent to the personal computer 2 (step A7).

When the personal computer 2 receives the key, the re-encryption process shown in FIG. 10 is performed, and the trial performance data of one file (one song) is encrypted as described above according to the key (second encryption). (Step A8).
Then, the MIDI processing shown in FIG. 11 is performed, and the encrypted data is inserted into the exclusive data and sent to the electronic organ 1 (step A9).

Next, the electronic organ 1 performs the decoding process shown in FIG. 12, receives all the exclusive data for one file from the personal computer 2, and decodes it into the performance data for trial listening (second decoding). ) Is performed (step A10). Then, the processing of the trial listening mode shown in FIG. 13 is performed to reproduce the decrypted trial listening performance data (step A11). That is, operations other than outputting to the outside of the electronic organ 1 are processed as usual.

On the other hand, the personal computer 2 detects the operation of the operator SW4 for ending the trial listening screen (FIG. 4 (B)) and monitors whether or not there is an instruction to end the trial listening (step A12). If there is an instruction to finish, an instruction to cancel the mode is sent to the electronic organ 1 (step A1).
3). Then, in the electronic organ 1, the mode release process shown in FIG. 14 is performed to erase the trial performance data in the memory so that the data to be written in the memory thereafter can be output to the outside (step A14). .

Next, the specific processing of steps A6 to A11 and A14 will be described with reference to the flow charts of FIGS. The electronic organ 1 is a personal computer 2
When an instruction to fix the mode is received from (step A6), the mode fixing process of FIG. 8 is started in response to this. First, in step S11, the data in the temporary storage unit preset in the RAM 10c or the like is erased, in step S12, the external transmission of the data in the temporary storage unit is prohibited, and in step S13, the data in the temporary storage unit is moved. Ban. Next, in step S14, the display of the display unit (10j in FIG. 3) is fixed to the trial listening mode screen so that it cannot be changed to another screen, and in step S15, writing of data in the temporary storage unit is prohibited. It should be noted that the write-protection of the temporary storage means prohibiting the writing by an external operation for editing the trial performance data in the temporary storage using the operator 10h of the electronic organ 1, as will be described later. In the internal processing of the electronic organ 1, such as writing of test-listening performance data sent from the personal computer 2, writing is performed as necessary.

The state after performing the above-mentioned respective settings of steps S11 to S15 is the "listening mode", and in this trial listening mode, the received performance data for trial listening cannot be output to the outside. The audition mode screen of the display unit is, for example, a screen similar to that of FIG. 4 (B), and it can be confirmed that the electronic organ 1 side is fixed in the audition mode. Further, in this trial listening mode, it is also preferable that the contents of the trial listening performance data cannot be changed or edited.

When the electronic organ 1 completes the mode fixing process, that is, when the mode fixing is completed, the electronic organ 1 starts the key generating process shown in FIG. First, in step S21, a random number having a specific length is generated, and in step S22, it is determined whether or not the generated number is a previously generated number,
If it is the previously generated number, the process returns to step S21. If it is not the previously generated number, the generated number is sent to the personal computer 2 as a re-encryption key in step S23. Then, in step S24, the generated key is held for decryption. It should be noted that those stored as the numbers (keys) generated previously may be excluded from the determination criteria sequentially if the history is somewhat old.

When the personal computer 2 receives the key from the electronic organ 1, in response to the key, the personal computer 2 of FIG.
The re-encryption (second encryption) process of FIG. 10 corresponding to (I) to (II) is performed, and in step S31, the decrypted (first decryption) MIDI format is performed according to the contents of the key. Encrypted by destroying the content of the performance data for trial listening (second encryption)
To do. Next, the personal computer 2 operates as shown in FIG.
To (III) corresponding to the MIDI conversion process of FIG. 11 is performed, and in step S41, a part of the data re-encrypted in step S31 of FIG. 10 is extracted, and in step S4.
In step 2, part of the data is embedded in the exclusive data. Then, in step S43, the exclusive data is sent to the electronic organ 1, and in step S44, it is determined whether or not all the re-encrypted data has been sent. If not all, the steps after step S41 are repeated. In step S45, the electronic organ 1 is notified that all the data has been sent.

The electronic organ 1 starts the decoding (second decoding) process of FIG. 12 when the data transmission from the personal computer 2 is started, and stores the data received in step S51 in the temporary storage section. In step S52, it is determined whether the data transmission is completed. If not completed, the process returns to step S51, and if completed, the process proceeds to step S53. That is, the next decryption is performed after the fact that the transmission is completed is received from the personal computer 2. In step S53, the received data is rearranged in a regular order based on the number indicating the order of the data, and in step S54, the embedded data is extracted from all the exclusive data and connected. And
Decryption (second decryption) is performed using the key held in step S55.

When the above decoding is completed, the electronic organ 1 starts the processing of the audition mode of FIG. 13, and step S6
At 1, the performance data for trial listening in the temporary storage section is reproduced. In this reproducing process, the reproduction mode data (registration data) in the trial listening performance data is assigned to the registration switch, and if the trial listening performance data includes song data, the automatic performance is performed based on the song data. To do.
Next, in step S62, the operation on the operation panel (of the electronic organ 1) is detected, and in step S63, it is determined whether or not the instructed operation is the operation prohibited in the audition mode. The prohibited operation is the operation of copying or editing the audition performance data in the temporary storage section.The operation to perform the operation is, for example, the operation to release the audition mode or the audition performance data to an external device. These are operations for transmitting (outputting), moving the trial-listening performance data to another storage unit in the electronic organ 1, an operation for making a duplicate of the trial-listening performance data, and an operation for editing the contents of the trial-listening performance data. On the other hand, the operation that is not prohibited is an operation for performing a trial listening using the performance data for trial listening such as a keyboard performance and a change of the playback mode. These are operations of a resist switch for changing the reproduction mode and an operation of turning off the power of the electronic organ 1.

If it is prohibited, the operation is ignored and the process returns to step S62. If it is not prohibited, the operation corresponding to the operation instructed in step S64 is performed and step S65 is performed. Proceed to. In step S65, it is determined whether or not the power supply is turned off. If it is not turned off, the process returns to step S62. The process ends.

Next, when the personal computer 2 gives an instruction to end the audition (step A12 in FIG. 7), the personal computer 2 sends an instruction to cancel the mode to the electronic organ 1, so that the electronic organ 1 shown in FIG. Start the mode release process. First, the data in the temporary storage unit is erased in step S71, the external transmission of the data in the temporary storage unit is enabled in step S72, and further step S73.
Use to enable data movement in the temporary storage. Next, in step S74, the normal mode screen is displayed on the display unit, and in step S75, writing of data in the temporary storage unit is enabled, and the process ends. As a result, the audition ends and the audition performance data is erased, and the electronic organ 1 returns to the normal state.

With the above-described processing, in the audition mode, the reproduction mode data assigned to the registration switch is read out and played on the keyboard with the reproduction mode of the electronic organ 1 changed or stored in the temporary storage section. Music data for trial listening can be automatically played. In addition, the external transfer operation and the content change operation of the data stored in the temporary storage unit are invalidated, and it is possible to prevent illegal copying of the trial performance data.

<Purchase Operation> FIG. 15 is a diagram showing the processing of the server 4, the personal computer 2 and the electronic organ 1 when the purchase operation in the embodiment is performed. When the end of the audition is instructed in the process of step A12 (FIG. 7) of the personal computer 2, the personal computer 2 returns to the initial screen of FIG. 4 (A). Therefore, select the desired song (for example, the song you listened to) on the initial screen and purchase the operator SW
1 is operated to request purchase (step B1). As a result, the server 4 performs the charging process (step B
2) The purchase performance data is encrypted (first encryption) and transmitted to the personal computer 2 (step B3).
Then, the personal computer 2 receives and decrypts the transmitted data (step B4).

When the decryption is completed, the personal computer 2 and the electronic organ 1 perform the checking operation of FIG. 16 in steps B5 and B6 to check whether the electronic organ 1 is ready for a floppy disk (storage unit). Check. In the processing of the confirmation operation of FIG. 16, in the personal computer 2, an instruction to confirm whether or not the floppy disk is inserted is sent to the electronic organ 1 in step S81. As a result, the electronic organ 1 determines whether or not the floppy disk is inserted in step S82, and transmits the determination result to the personal computer 2 as status information in step S83. In step S84, the personal computer 2 determines whether or not it has been inserted. If not, then in step S85, a display prompting the user to insert the floppy disk into the electronic organ 1 is displayed, and the process returns to step S81.

The loop of steps S81 to S85 is repeated until the floppy disk is inserted, and the insertion is periodically confirmed. In addition, in this example, the insertion of the floppy disk is regularly confirmed. However, when a screen prompting the insertion of the floppy disk is displayed and the OK switch on this screen is pressed (when clicked) ) May be reconfirmed that the floppy disk is inserted.

If a floppy disk is inserted,
In step S86, an instruction to confirm whether the floppy disk is in the unformatted state is sent to the electronic organ 1. As a result, the electronic organ 1 determines the formatted state of the floppy disk in step S87, and formats the floppy disk if unformatted in step S88. Then, in step S89, the fact that the formatting is completed is notified to the personal computer 2 as status information. Next, in step S801, the personal computer 2 sends an instruction to the electronic organ 1 to confirm whether or not there is a free area on the floppy disk. At this time, the data of the capacity necessary for recording the purchase performance data is also sent.

As a result, the electronic organ 1 determines in step S802 whether or not there is a free area in the floppy disk, and in step S803 the determination result is transmitted to the personal computer 2 as status information. In step S804, the personal computer 2 determines whether or not there is a free space. If there is no free space, then step S805.
Then, a display prompting the user to make a free area on the floppy disk is displayed, and the process returns to step S801. If there is a free area on the floppy disk, the process proceeds to step B7 in FIG. 15 to return to the purchase operation. Note that steps S801 to S80
The loop of 5 is repeated until free space is created,
It is also possible to display a screen prompting the user to create an empty area and reconfirm the existence of the empty area only when the OK switch on this screen is pressed (when clicked).

The processing of steps B7 to B12 in FIG.
Processing similar to the processing for the trial listening performance data in steps A5 to A10 (FIGS. 8 to 12) in FIG. 7 is performed on the purchasing performance data, and a detailed description thereof will be omitted. , Until the recording of the performance data for purchase on the floppy disk and the release of the mode, the external transmission of the data in the temporary storage section is prohibited as described above.
Prohibition of movement of data in the temporary storage unit and prohibition of writing of data in the temporary storage unit are set.

When the decryption is completed in step B12 of the electronic organ 1, the decrypted purchase performance data is written in the floppy disk (storage section) in step B13, and the floppy disk (storage section) is protected in step SB14. Ends the process. This protection is a process of prohibiting copying (copying) of the performance data for purchase from the floppy disk, and a known technique can be applied.

On the other hand, when the personal computer 2 finishes sending all the data re-encrypted by the MIDI processing of step B11 to the electronic organ 1, it sends an instruction to cancel the mode to the electronic organ 1 (step B15). ), The electronic organ 1 receives the instruction and performs the mode releasing process (step A16). In addition, step A
The mode release processing of 16 is also similar to that of FIG.
By this processing for canceling the mode, the performance data for purchase in the temporary storage section is erased and the electronic organ 1 returns to the normal state.

By the above processing, the presence / absence of the floppy disk, the format state, and the presence / absence of a free area can be automatically confirmed, and the distributed performance data can be surely acquired. Further, when the performance data is transmitted from the personal computer 2 to the electronic organ 1, the personal computer 2 must re-encrypt and transmit the performance data, and the electronic organ 1 must be re-decrypted with a key to be effective as the performance data. The data output from the computer 2 via the MIDI cable cannot be used as it is as performance data, and it is possible to prevent unauthorized use.

In the purchase operation (FIG. 15) of the embodiment, the mode cancellation is instructed after sending all the data in the MIDI processing (step B11) of the personal computer 2. After completing the protection of the floppy disk in 1, the electronic organ 1 to the personal computer 2
Alternatively, the personal computer 2 may instruct the cancellation of the mode by issuing a request to cancel the mode.

In the embodiment, the performance data for trial listening is stored in the server 4, but the performance data for trial listening is not prepared, and when the request for trial listening is met, specific information is obtained from the performance data for purchase. The deleted data may be created as performance data for trial listening, and this may be distributed for trial listening.

The instruction to set the audition mode may be issued from the server to the electronic organ via the personal computer instead of the personal computer. By doing so, the provider of the performance data for trial listening can surely protect the performance data.

When the personal computer is connected to the site, the electronic organ is set to the audition mode,
You can keep listening mode active until you exit the site or turn off the electronic organ or personal computer.

Before confirming the floppy disk, it is preferable to confirm that the electronic organ is connected and, if not, prompt the connection of the electronic organ. Then, the confirmation operation of the floppy disk may be performed after the connection of the electronic organ is confirmed.

Further, in the embodiment, the determination result of the presence / absence of the floppy disk, the format state, and the presence / absence of the free area are sent to the personal computer one by one. The result may be sent to the personal computer at once as status information.

In the embodiment, the case where the floppy disk is used as the storage unit has been described. However, when the electronic organ has a plurality of types of storage units, it is possible to select which storage unit to record the purchase performance data. You may The selection method is a method selected by the user on the personal computer, a method selected by the user on the electronic organ, a method automatically selected by the personal computer,
Any method automatically selected by the electronic organ may be used. When the electronic organ is selected, the personal computer is notified of the selected storage unit, and the same checking operation and purchase operation are performed as the storage unit for storing the purchase performance data.

The encryption applied when the performance data is sent from the server to the personal computer and the encryption applied when the performance data is sent from the personal computer to the electronic organ are respectively created as the result of the encryption. Any encryption method may be used as long as the data has a format capable of transmitting a communication path between the server and the personal computer and between the personal computer and the electronic organ. The method of the embodiment is one of the preferred methods in terms of ease of processing and certainty of protection.

Encryption by the personal computer is 1
Not only the data of all files is encrypted, but MI
Any format may be used as long as it can be output from the DI terminal, and the original performance data cannot be reproduced by simply reproducing the output data. For example, a method may be used in which only a part of the performance data for one file is encrypted using a key, embedded in the exclusive data and transmitted, and the other data is transmitted as it is.

When the electronic organ is directly connected to the server, the operation of the personal computer may be performed by the electronic organ or by the server. In this case, re-encryption is unnecessary. The server may send the performance data to the electronic organ by performing the encryption performed by the personal computer, or the electronic organ may be provided with an interface capable of receiving the data encrypted by the encryption performed by the server. The decryption performed by the personal computer may be performed on the electronic organ side. In this case, the server performs the part of the checking operation that was performed by the personal computer. That is, the server sends an instruction to the electronic organ to confirm the state of the storage unit (for example, floppy disk), and the electronic organ sends the same state information of the storage unit to the server. Also, the server can
A display or the like prompting the electronic organ to set the storage unit to a state in which performance data can be stored is displayed.

In the above example, a personal computer has been described as an example of the performance data transfer control device connected to the server. However, the first electronic musical instrument is directly connected to the server as the performance data transfer control device, and the performance data transfer control device is further connected to the personal computer. When connecting another electronic musical instrument to one electronic musical instrument,
Needless to say, the electronic musical instrument may be caused to operate the personal computer 2, and the other electronic musical instrument may be caused to operate the electronic organ 1. in this case,
The first electronic musical instrument may be provided with an interface capable of receiving the data encrypted by the encryption performed by the server.

In the above embodiments, the electronic organ has been described as an example, but the electronic musical instrument may have any form.
Further, although the case where the performance data includes the reproduction mode data (registration data) for the electronic organ has been described, the performance data may be, for example, only music data. Further, it goes without saying that the performance data may have any form.

[0070]

According to the execution of the electronic musical instrument of claim 1 or the performance data acquisition program of claim 3, in the audition mode, audition can be performed with the audition performance data recorded in the temporary storage area. , The performance data for trial listening cannot be output to the outside. When the trial listening mode is released, the trial listening performance data recorded in the temporary storage area is forcibly erased. Therefore, it is possible to surely prevent the performance data for trial listening from leaking or being illegally used.

According to the performance data transfer control device of the second aspect or the performance data transfer control program of the fourth aspect, the electronic musical instrument of the first aspect can be suitably controlled, and the performance data for trial listening flows out. It is possible to prevent illegal use.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an entire system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of reproduction mode data and music data in the embodiment of the present invention.

FIG. 3 is a block diagram of an electronic organ and a personal computer according to an embodiment of the present invention.

FIG. 4 is a diagram showing an example of an initial screen and a trial listening screen in the embodiment of the present invention.

FIG. 5 is a diagram conceptually showing a schematic operation and a flow of data and instructions in the embodiment of the present invention.

FIG. 6 is a diagram showing a concept of second encryption in the embodiment of the present invention.

FIG. 7 is a diagram showing a processing procedure of a server, a personal computer, and an electronic organ when performing a trial listening operation in the embodiment of the present invention.

FIG. 8 is a flowchart of mode fixing processing according to the embodiment of the present invention.

FIG. 9 is a flowchart of a key generation process according to the embodiment of the present invention.

FIG. 10 is a flowchart of a re-encryption process according to the embodiment of the present invention.

FIG. 11 is a flowchart of a MIDI conversion process according to the embodiment of the present invention.

FIG. 12 is a flowchart of a decoding process according to the embodiment of the present invention.

FIG. 13 is a flowchart of processing in a trial listening mode according to the embodiment of the present invention.

FIG. 14 is a flowchart of a mode releasing process according to the embodiment of the present invention.

FIG. 15 is a diagram showing processing of a server, a personal computer, and an electronic organ when performing a purchase operation in the embodiment of the present invention.

FIG. 16 is a diagram showing processing of a confirmation operation according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Electronic organ (electronic musical instrument), 2 ... Personal computer (performance data transfer control device), 3 ... Communication network, 4 ... Server.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akira Suzuki             Yamaha stock, 10-1 Nakazawa-machi, Hamamatsu-shi, Shizuoka             In the company F term (reference) 5D378 MM12 MM92 QQ05 QQ06 QQ34                       QQ38 WW09 ZZ05

Claims (4)

[Claims] 1. A function of receiving a setting instruction from an external device and for setting an audition mode by prohibiting an operation of outputting data from a temporary storage area to the outside, and receiving a performance data for audition from an external device. And a function of recording the trial listening performance data in a temporary storage area and a function of erasing the trial listening performance data recorded in the temporary storage area when the trial listening mode is released. Musical instrument. 2. A function of sending an instruction to set an audition mode to an external device when the start of the audition mode is instructed; a function of sending the performance data for audition to the external device after sending the setting instruction; A performance data transfer control device, comprising a function of sending an instruction to release the trial listening mode to the external device when an end is instructed. 3. A process of receiving a setting instruction from an external device and setting an audition mode by prohibiting an operation of outputting data from a temporary storage area to the outside, and receiving a performance data for audition from an external device. Recording the performance data for trial listening in a temporary storage area and deleting the performance data for trial listening recorded in the temporary storage area when the trial listening mode is cancelled. Acquisition program. 4. A process of sending a setting command of the audition mode to an external device when the start of the audition mode is instructed, a process of sending the performance data for audition to the external device after sending the setting command, A performance data transfer control program for executing, on a computer, a process of sending an instruction to cancel the audition mode to the external device when the end is instructed.