JP4674562B2 - Electronic musical instrument and computer program applied to the electronic musical instrument - Google Patents

Description

  The present invention relates to an electronic musical instrument having a function of displaying a web page on a display device and enabling communication according to the web page with a server computer, and a computer program applied to the electronic musical instrument.

Conventionally, as shown in, for example, Patent Document 1 below, music content data such as sound waveform data, music data (MIDI data), electronic score data, and the like is purchased by communication with a server computer and used as an electronic musical instrument. Electronic musical instruments that are designed to be played back are known.
Further, in Patent Document 2 below, an electronic musical instrument and a printer are connected to a personal computer so that the electronic musical score data on the personal computer is printed by the printer, or the musical instrument is generated using performance data generated from the electronic musical score data. Shows a technique for automatically playing music corresponding to the electronic score data.
JP 2003-271766 A JP 2004-117487 A

  In general, when purchasing music content, it may be desired to check or store content purchase information such as a list of content that can be purchased, receipts at the time of content purchase, and content purchase history. However, since the conventional electronic musical instrument does not have a printing function, the content purchase information cannot be printed and stored. In addition, the display device in the electronic musical instrument is usually composed of a small LCD display device, which is inconvenient in confirming the content purchase information. It is also known to connect a personal computer to an electronic musical instrument as in the latter prior art, but even in this case, in order to confirm and store the content purchase information, it is necessary to bother personally. It is necessary to prepare a computer and connect it to an electronic musical instrument. Even if a personal computer is connected to an electronic musical instrument, the operation is complicated. That is, the conventional electronic musical instrument is inconvenient for confirming and storing the content specified by the web page.

  The present invention has been made to address the above problems, and its purpose is to easily print the content specified on the web page in connection with the purchase of music content by communication with a server computer, It is an object to provide an electronic musical instrument that allows a user to easily confirm and store the same contents, and a computer program applied to the electronic musical instrument.

In order to achieve the above object, the present invention is characterized in that web page data fetching means for fetching web page data from a server computer in an electronic musical instrument that is communicably connected to a server computer and directly connected to a printer device. Display control means for displaying a web page represented by the fetched web page data on a display, and each of the display states of the web page defined by the web page data according to a user instruction and including a print instruction File acquisition means for acquiring code data representing the processing content of the file and a file containing the print content or the storage destination of the print content, and when the code data represents a print instruction, printing is performed based on the acquired file. Print content data to obtain print content data representing the content An acquisition unit; an image file generation unit that converts the acquired print content data according to the capability of the connected printer device to generate an image file that can be printed by the printer device; and the generated image file is a printer. And a print control means for sending the print contents to the printer and causing the printer to print. In this case, the print content is, for example, a list of contents that can be purchased, a receipt at the time of purchasing the contents, or a purchase history of the contents. In the present specification, “directly connecting a printer device to an electronic musical instrument” means excluding connecting the printer device via another device such as a personal computer.

In this case, in the electronic musical instrument, the web page data captured by the web page data capturing unit further includes code data representing the processing content of each file including the print instruction and a file including the print content or the storage destination of the print content. It is preferable to provide automatic file acquisition means for automatically loading the file described to be read when it is described to be read.

In addition, when the file acquired by the file acquisition unit includes the print content, the print content data acquisition unit may extract the print content data from the acquired file. In addition, when the file acquired by the file acquisition unit includes a storage destination of the print content, and the storage destination is a storage device provided in the electronic musical instrument , the print content data acquisition unit prints from the storage device provided in the electronic musical instrument. Content data may be acquired . Further, when the file acquired by the file acquisition unit includes a storage destination of the print content, and the storage destination is a server computer , the print content data acquisition unit may acquire the print content data from the server computer. Good.

  In the present invention configured as described above, in a web page display state, a print content defined by web page data is printed by a printer device in accordance with a user instruction. Therefore, the contents specified by the web page (for example, a list of contents that can be purchased, receipts at the time of purchase of contents, history of purchase of contents, etc.) can be performed simply by following the instructions on the web page without preparing a personal computer. Etc.), the user can easily confirm and store the content specified by the web page.

  Furthermore, the implementation of the present invention is not limited to the invention of the electronic musical instrument, and can be implemented as an invention of a computer program and method applied to the electronic musical instrument.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a state in which an electronic musical instrument EL according to the present invention is communicably connected to a server computer SV via a communication network NW, and a printer PR is connected to the electronic musical instrument EL. The communication network NW is, for example, the Internet. The server computer SV includes a computer and a large-capacity storage device (database). In the storage device, music content such as web page data (html file for displaying the web page), sound waveform data, music data (MIDI data), electronic score data, and the like, which will be described later in detail. In addition, a program executed by the computer is stored.

  The printer PR is directly connected to the electronic musical instrument EL via the USB connector 11, the USB cable 12, and the USB connector 13. The printer PR and the electronic musical instrument EL are provided with connector portions to which the USB connectors 11 and 13 are detachably connected. In a state where the printer PR is connected to the electronic musical instrument EL, the electronic musical instrument EL functions as a USB device and also functions as an SICD (Still Image Capture Device) interface. The printer PR functions as a USB host. Further, the electronic musical instrument EL and the printer PR operate according to CIPA standard DC-001 (hereinafter referred to as “PictBridge” (registered trademark)), and the printer PR prints an image corresponding to the image data from the electronic musical instrument ER. Here, the USB connectors 11 and 13, the USB cable 12, the connector part on the electronic musical instrument EL side, the USB interface circuit 34 described later, and the like constitute means for directly connecting the electronic musical instrument EL of the present invention and the printer PR.

  The electronic musical instrument EL includes a keyboard 21 composed of a plurality of keys, and a plurality of setting operators 22 and a display 23 provided on the operation panel. The keyboard 21 is operated by a user to instruct the generation of musical sounds and to specify the pitch of the generated musical sounds. The plurality of setting operators 22 are operated by a user operation to instruct various operations of the electronic musical instrument EL. The display device 23 is for displaying characters, graphics, and the like on the display screen, and is configured by a small liquid crystal display (LCD) in this embodiment.

  As shown in FIG. 2, the keyboard 21, setting operator 22 and display 23 are connected to a bus 24 via a detection circuit 21a, a detection circuit 22a and a display control circuit 23a, respectively. The detection circuit 21a detects an operation of the keyboard 21. The detection circuit 22 a detects the operation of the setting operator 22. The display control circuit 23 a controls display on the display device 23.

  A sound source circuit 25 and an effect circuit 26 are also connected to the bus 24. The tone generator circuit 25 generates a digital tone signal based on performance data and various tone control parameters supplied under the control of the computer unit 31 described later, and outputs the generated digital tone signal to the effect circuit 26. The effect circuit 26 adds an effect such as reverb or chorus to the supplied digital musical sound signal and outputs it to the sound system 27 under the control of the computer unit 31. The sound system 27 includes a D / A converter, an amplifier, a speaker, and the like, converts a supplied digital musical sound signal into an analog musical sound signal, amplifies it, and emits the sound through the speaker.

  The electronic musical instrument includes a CPU 31a, a timer 31b, a ROM 31c, and a RAM 31d that are connected to the bus 24 and constitute the computer unit 31, and an external storage device 32, a MIDI interface circuit 33, a USB interface circuit 34, and the like. A communication interface circuit 35 is also provided.

  The external storage device 32 includes various recording media such as a hard disk HD and a flash memory that are pre-installed in the electronic musical instrument, a compact disc CD and a flexible disc FD that can be mounted on the electronic musical instrument, and a drive unit for each recording medium. Various programs and data including programs to be described later are stored. These programs and data may be stored in advance in the external storage device 32, or may be taken in from the outside via the MIDI interface circuit 33 and the communication interface circuit 35. Various programs and data are also stored in advance in the ROM 31c.

  The MIDI interface circuit 33 can be connected to a MIDI-compatible external device 41 such as another electronic musical instrument or a personal computer, and the electronic musical instrument EL can communicate various programs and data with the external device 41. The USB interface circuit 34 is connected to the USB connector 13 and is connected to the USB host device 42. In this embodiment, the USB interface circuit 34 is connected to the printer PR as the USB host device 42 via the USB connector 13, the USB cable 12, and the USB connector 11. The communication interface circuit 35 can be connected to the server computer SV via the communication network NW, and the electronic musical instrument EL can receive various programs and data from the server computer SV or transmit them to the server computer SV. ing.

  Next, the operation of the electronic musical instrument EL configured as described above will be described. When the user turns on a power switch of an electronic musical instrument (not shown) and instructs the access to the server computer SV by operating the setting operator 22, the computer unit 31 executes the web page processing program in step E10 of FIG. Start. After starting the execution of the web page processing program, the computer unit 31 acquires an html file representing the web page from the server computer SV via the communication network NW in step E11. In this case, the acquired html file may be stored in the RAM 31d, but may be stored in the external storage device 32. If the previously stored html file is left in the external storage device 32, the html file may be acquired from the external storage device 32 instead of the server computer SV.

  Next, the computer unit 31 displays the acquired html file on the display unit 23 in step E12. The screen display in this case is a display of information relating to acquisition of print content data to be printed according to the present invention. That is, it is a display relating to acquisition of data indicating the contents to be printed, that is, a musical instrument remote file, such as a list of contents that can be purchased, receipts at the time of purchase of contents, and purchase history of contents.

  Here, some explanations regarding the purchase of contents will be given, and the instrument remote file will be explained. Regarding the purchase of content, by executing a program (not shown), the content desired to be purchased (for example, sound waveform data, music data (MIDI data), electronic score data, etc.) on the screen of the list of contents that can be purchased as described above. Music content data) is selected by the user. When the user selects a desired content using the setting operation element 22, the computer unit 31 of the electronic musical instrument EL requests the server computer SV for the selected content. In response to this request, the server computer SV executes billing processing for the user and distributes the content selected by the user to the electronic musical instrument EL. The computer unit 31 of the electronic musical instrument EL downloads the distributed content to the external storage device 32. Thereafter, the user can use the downloaded content.

  As shown in FIG. 5, the instrument remote file stores various data including print content data to be printed by the printer PR, and includes one or a plurality of files 1, 2,. Each file includes a file identifier, a remote ID, a remote data size, a remote data type flag, remote data, and the like. The file identifier represents a file name and has an extension (for example, GRM1) indicating a musical instrument remote file. The remote ID is code data representing the processing content of each file including a print instruction directly related to the present invention. In the present embodiment, the code representing the print instruction is “6” in the figure. The remote data size represents the size of each file. The remote data type flag indicates the type of remote data. For example, “the remote data is the print content data itself”, “the file to the print content data file stored in the external storage device 32” "It is a path" or "The remote data is a URL of a print content data file stored in the server computer SV". The remote data is various data including the print content data, file path or URL. A remote ID indicating the end of the file is attached to the end of the instrument remote file.

  The print content data is data representing the content that is actually printed by the printer PR, and includes information related to the purchase of the content (for example, list information of content that can be purchased, receipts at the time of purchase of content, content of content by the user) Purchase history). Such print content data may be directly included in one or more files constituting the instrument remote file as described above, or may be stored in the database of the external storage device 32 or the server computer SV. In some cases, the print content data file is provided independently of the instrument remote file. Such a musical instrument remote file and print content data file may be provided in advance in a database in the server computer SV, but may be stored and stored in the external storage device 32 of the electronic musical instrument EL. Specifically, for example, at the time of content purchase, the server computer SV sends an instrument remote file or print content data file containing information related to the purchase of content such as the list information, receipts, purchase history, etc. to the external storage device of the electronic musical instrument EL. It can also be downloaded to 32.

  Returning to the description of the web page processing program in FIG. 3 again, in step E13, the computer unit 31 determines whether or not it is described to read the instrument remote file in the acquired html file. If reading of an instrument remote file is described, an instrument remote file processing routine is executed at step E14. If the reading of the instrument remote file is not described, the process of step E14 is jumped, and the processes after step E15 are executed. When the web page is opened for the first time, a normal menu is displayed on the display 23, and there is no description that the instrument remote file is read into the acquired html file. Therefore, the processing of step E14 will be described later, and the processing after step E15 will be described next.

  In step E15, the computer unit 31 determines whether an operation for reading an external file is performed in a state where the web page is displayed on the display unit 23. This external file reading operation is performed in association with the display state of the display 23 using the mouse, movement key, enter key, etc. in the setting operator 22. Moreover, if the display device 23 is a touch panel type, the function can also be used. Specifically, a text display representing a hyperlink is clicked or selected. Click or select the display button associated with loading an external file. Move the cursor over the display associated with reading an external file. After focusing on the display unit linked to reading of the external file, the instruction to the display unit is determined. Instruct "Back" and "Forward" to select an external file. These external file reading operations, especially instructions such as “return” and “forward”, are to acquire web page data (html file) and return the web page to the previous page or advance to the next page. Including.

  Next, the computer unit 31 determines whether or not the external file instructed to be read in step E16 is an html file. If the file is in the html format, the process returns to step E11, and the html file is acquired and displayed on the display unit 23 by the processes in steps E11 and E12 described above. If the file is not in the html format, it is determined in step E17 whether the external file is in the instrument remote file format. This determination can be made based on the extension “GRM1” of the file identifier (see FIG. 5). If the file is in the instrument remote file format, the instrument remote file processing routine is executed in step E18. If the file is not in the instrument remote file format, processing other than the html file format and the instrument remote format file is executed in step E19. Note that the processing in step E19 is not directly related to the present invention, and thus description thereof is omitted. After the processes of steps E18 and E19, the computer unit 31 executes the circulation process of steps E15 to E19 described above.

  Next, the instrument remote file processing routine will be described. The execution of the instrument remote file processing routine is started in step E20 of FIG. 4, and the computer unit 31 of the electronic instrument EL stores the file path in the external storage device 32 in the description of reading of the instrument remote file in step E21. Determine whether the instrument remote file is indicated. If the file path indicates the instrument remote file in the external storage device 32, the instrument remote file indicated by the file path is acquired from the external storage device 32 in step E22. If the file path does not indicate the instrument remote file in the external storage device 32, the computer unit 31 sends a request for the instrument remote file indicated by the file path to the server computer SV via the communication network NW in step E23. Send.

  In parallel with the musical instrument remote file processing routine in the electronic musical instrument EL, the server computer SV starts executing the file transmission program in step S20, and repeatedly executes the cyclic processing consisting of steps S21 and S22. When there is a request for an instrument remote file from the electronic instrument EL as described above, the server computer SV receives the request in step S21, and transmits the instrument remote file designated by the file path in step S22 via the communication network NW. To the electronic musical instrument EL. In the electronic musical instrument EL, the computer unit 31 receives the musical instrument remote file sent from the server computer SV in step E24.

  After the processes of steps E22 and E24, the computer unit 31 executes the processes of steps E25 to E32 for each of one or more files constituting the instrument file received from the external storage device 32 or the server computer SV. To do. If the remote ID of each file does not represent “printing”, “No” is determined in step E25, processing according to the remote ID is executed in step E26, and this instrument remote file is executed in step E39. The execution of the processing routine is terminated. Since processing other than “printing” is not directly related to the present invention, detailed description thereof is omitted.

  If the remote ID represents “printing”, the computer unit 31 executes the determination processing of steps E27 and E28. In step E27, it is determined whether the remote data is the print data itself based on the remote data type flag. In step E28, it is determined whether the remote data indicates the file path of the external storage device 32 based on the remote data type flag. If the remote data is the print content data itself, “Yes” is determined in step E27, and the print content data is extracted from the remote data in step E29. If the remote data indicates the file path of the external storage device 32, “Yes” is determined in step E28, and the print contents stored in the external storage device 32 and specified by the file path in step E30. Get the data file.

  If the remote data is not the print content data itself and does not indicate the file path of the external storage device 32, it is determined "No" in steps E27 and E28, and the computer unit 31 performs communication in step E31. A request for the print content data file indicated by the file path which is the remote data is transmitted to the server computer SV via the network NW. The server computer SV receives the request in step S21 during the circulation process consisting of the steps S21 and S22, and sends the print content data file designated by the file path in step S22 to the electronic musical instrument EL via the communication network NW. send. In the electronic musical instrument EL, the computer unit 31 receives the print content data file sent from the server computer SV in step E32.

  After the processing in steps E29, E30, and E32, the computer unit 31 converts the print content data into an image file page by page in step E33 according to the format supported by the printer PR. This one page means one page in a printed state. The conversion to the image file will be described with a specific example. When the print content data file is in text format or html format, the font information in the ROM 31c is used to create an image file that matches the capabilities of the printer PR. To do. Also, if the print content data is image data, it is converted into image data in a format that matches the capabilities of the printer. For example, when the print content data file is in the GIF format and the printer supports only the BPM format, the print content data file in the GIF format is converted into an image file in the BPM format. However, if the print content data file can be directly printed by the printer PR, there is no need for conversion. The format supported by the printer PR is defined by settable information acquired when the printer PR is connected to the electronic musical instrument EL via the USB connectors 11 and 13 and the USB cable 12.

  The settable information will be specifically described. When the printer PR is connected to the electronic musical instrument EL and the printer PR and the electronic musical instrument EL are powered on, initialization is performed according to the USB specifications of the computer unit 31 and the computer unit built in the printer PR. The settable information is set by a process, that is, an enumeration process. In this initialization process, first, the electronic musical instrument EL detects the printer PR as a USB host device, and the printer PR detects the electronic musical instrument as a SICD (Still Image Capture Device). Next, it is confirmed that the electronic musical instrument EL and the printer PR are compatible with the protocol for image printing. Next, the electronic musical instrument EL and the printer PR confirm what service functions they have. Specifically, the electronic musical instrument EL informs the printer PR that it has an image file supply function and uses the other party's printing function. The printer PR tells the electronic musical instrument EL that it has a printing function and uses the partner image file supply function. Finally, the electronic musical instrument EL inquires about the capability that can be set with respect to the printer PR, and the printer PR transmits settable information indicating the capability that can be set in response to this inquiry to the electronic musical instrument EL. Here, the settable capability of the printer PR is a file format that can be received, such as image data in a bitmap data (BMP) format, for example.

  Returning to the description of FIG. 4, after the processing in step E33, the computer unit 31 requests the printer PR to start printing in step E34. On the other hand, in parallel with the execution of the instrument remote file processing routine in the electronic musical instrument EL, the printer PR starts the execution of the print processing program in step P10 and repeatedly executes the circulation process including steps P11 to P17. When there is a print start request from the electronic musical instrument EL as described above, the printer PR receives the print start request in step P11, and requests image file information (file size, etc.) from the electronic musical instrument EL in step P12. In step E35, the computer unit 31 of the electronic musical instrument EL transmits image file information to the printer PR in accordance with a request from the printer PR. The printer PR receives the image file information transmitted in step P13, and requests an image file in step P14.

  In step E36, the computer unit 31 of the electronic musical instrument EL transmits the image file generated by the process of step E33 to the printer PR in accordance with a request from the printer PR. The printer PR receives the image file transmitted in step P15, and prints the image file received in step P16. When the printing of the image file is completed, the printer PR sends a completion notification to the electronic musical instrument EL in step P17. The computer unit 31 of the electronic musical instrument EL receives this completion notice in step E37, and determines in step E38 whether printing of all pages related to the print content data has been completed. When the printing of all pages is completed, the computer unit 31 determines “Yes” in step E38 and ends the execution of the instrument remote file processing routine.

  If printing of all pages has not been completed, the computer unit 31 makes a “No” determination at step E38 to return to step E33, and an image file relating to the next page is obtained by the process including steps E33 to E38 described above. Send to printer PR. The printer PR prints the image file of the next page by the processing in steps P11 to P17 described above. Thereby, the printing related to the instrument remote file designated by the html file acquired by the process of step E11 in FIG. 3 is completed. In this way, when the user designates the instrument remote file in the state where the web page (html file) is displayed on the display device 23, the print contents defined by the instrument remote file (for example, a list of contents that can be purchased, The receipt of the content purchase, the purchase history of the content, etc.) are printed by the printer PR.

  Next, a case where the file instructed to be read by the user is in the html file format will be described. In this case, as described above, the computer unit 31 determines “Yes” in step E16, acquires the html file by the processing in steps E11 and E12, and displays it on the display unit 23. If reading of the instrument remote file is not described in the html file, the process of step E14 is skipped and the process after step E15 is executed as described above.

  However, when a web page is advanced sequentially or to a specific page, it may be described that an instrument remote file is read in an html file related to the next display. In this case, “Yes” is determined in step E13, and the instrument remote file processing routine in step E14 is executed. The processing of the instrument remote file processing routine is as described above, and the print content data defined by the instrument remote file instructed to be read is acquired by the processing of the routine, and the printing represented by the data is performed. The contents are printed by the printer PR. In this operation, in the display state of the web page immediately before the currently displayed web page, in response to the external file reading operation by the user, the print content specified by the web page data is printed by the printer PR. means.

  As can be understood from the above operation description, in the above-described embodiment, in the display state of the web page on the display unit 23, the print content defined by the web page data (html file) is printed by the printer PR in accordance with a user instruction. Is done. As a result, according to the above-described embodiment, the contents specified by the web page (for example, a list of contents that can be purchased, receipts at the time of purchase of contents, purchase history of contents, etc.) by simple operations such as following instructions on the web page ) Is printed, the user can easily confirm and store the content specified by the web page. In particular, in this case, the printer PR can be used by directly connecting to the electronic musical instrument EL via the USB cable 12, and it is not necessary to interpose a personal computer, so that it is not necessary to prepare a personal computer without complicated operations. Nor.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  In the above embodiment, web page data, print content data files, etc. are basically stored and saved in the server computer SV except for data downloaded from the server computer SV to the external storage device 32 of the electronic musical instrument EL. I used it. However, instead of these, web page data, a print content data file, and the like may be stored in advance in the external storage device 32 of the electronic musical instrument EL and used.

  Furthermore, in the above-described embodiment, the present invention is applied to the electronic musical instrument EL that employs the keyboard 21 as a performance operator. However, instead of a key, a performance operator that designates a pitch using a simple press switch, touch switch, or the like. The present invention may be applied to the adopted electronic musical instrument. In particular, the present invention can be applied to electronic musical instruments such as electronic stringed musical instruments and electronic wind instruments regardless of the form of the electronic musical instrument.

1 is an overall schematic diagram of a data distribution system including a printer, an electronic musical instrument, and a server computer according to an embodiment of the present invention. It is a whole block diagram of the electronic musical instrument of FIG. It is a flowchart which shows the web page processing program performed with the said electronic musical instrument. It is a flowchart which shows the detail of the musical instrument remote file processing routine in the said web page processing program, the file transmission processing program run by a server computer, and the printer processing printer run by a printer. It is a figure which shows the example of a format of an instrument remote file.

Explanation of symbols

EL ... electronic musical instrument, SV ... server computer, PR ... printer, NW ... communication network, 12 ... USB cable, 21 ... keyboard, 22 ... setting operator, 23 ... display, 25 ... sound source circuit, 31 ... computer unit, 32 ... External storage device 34 ... USB interface circuit 35 ... Communication interface circuit

Claims (7)

In an electronic musical instrument that is communicably connected to a server computer and directly connected to a printer device,
Web page data fetching means for fetching web page data from the server computer;
Display control means for displaying a web page represented by the fetched web page data on a display;
In the display state of the web page, the code data representing the processing content of each file including the printing instruction and the file including the printing content or the storage destination of the printing content are obtained by the user's instruction and specified by the web page data. File acquisition means to
Print content data acquisition means for acquiring print content data representing print content based on the acquired file when the code data represents a print instruction ;
Image file generation means for converting the acquired print content data according to the capability of the connected printer device and generating an image file that can be printed by the printer device;
An electronic musical instrument comprising: a print control unit that sends the image file to the printer device and causes the printer device to print the print content. The electronic musical instrument according to claim 1 , further comprising:
It is described that the web page data fetched by the web page data fetching unit reads the code data representing the processing contents of each file including the printing instruction and the file including the printing contents or the storage destination of the printing contents. An electronic musical instrument provided with automatic file acquisition means for automatically taking in the file described to be read . The electronic musical instrument according to claim 1 or 2 ,
When the file acquired by the file acquisition unit includes a print content, the print content data acquisition unit extracts the print content data from the acquired file . The electronic musical instrument according to claim 1 or 2 ,
When the file acquired by the file acquisition unit includes a storage destination of print contents, and the storage destination is a storage device provided in the electronic musical instrument, the print content data acquisition unit is stored in a storage device provided in the electronic musical instrument. An electronic musical instrument for acquiring the print content data. The electronic musical instrument according to claim 1 or 2 ,
When the file acquired by the file acquisition unit includes a storage location for print contents, and the storage destination is the server computer, the print content data acquisition unit acquires the print content data from the server computer. An electronic musical instrument. The electronic musical instrument according to any one of claims 1 to 5,
The printed content is an electronic musical instrument that is a list of contents that can be purchased, a receipt when the contents are purchased, or a purchase history of the contents. A computer that is communicably connected to a server computer and applied to an electronic musical instrument that is directly connected to a printer device.
A web page data fetching function for fetching web page data from the server computer;
A display control function for causing a display to display a web page represented by the captured web page data;
In the display state of the web page, the code data representing the processing content of each file including the printing instruction and the file including the printing content or the storage destination of the printing content are obtained by the user's instruction and specified by the web page data. File acquisition function
When the code data represents a print instruction, based on the acquired file, the print content data acquisition function for acquiring print content data representing the print content and the acquisition according to the capability of the connected printer device An image file generation function that converts the printed content data and generates an image file that can be printed by the printer device;
A computer program for realizing a print control function for causing the generated image file to be sent to the printer device and causing the printer device to print the print contents.

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