JP2017117073A - Music reproduction application program and graphical user interface for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a GUI for enabling music to be reproduced by batch operation in a state where many apparatuses for storing sound source data and many apparatuses having a reproduction function are connected on a network.SOLUTION: On an operation screen, there are provided: a reproduction device selection region 20 in which a reproduction unit selection icon for using a selection function of a reproduction apparatus connected to a music reproduction device main body 10, and an external reproduction device selection icon for using a selection function of an external reproduction device having a music reproduction function connected to a network are arranged; and a sound source data selection region 21 in which a main body storage sound source selection icon for selecting sound source data which is directly stored on a storage of the music reproduction device main body 10, and a network sound source selection icon for selecting a sound source stored on an apparatus having a storage capable of storing the sound source from among other apparatuses connected to the network are arranged. These reproduction device selection region 20 and the sound source data selection region 21 are arranged and displayed on the same screen.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a music playback application program for selecting sound source data and a playback device in a music playback application program, and a graphical user interface of the program.

It is becoming common for sound source data used for music playback to be managed as digital data. Even in the home environment, a large amount of sound source data can be stored in a storage such as an HDD, or sound source data can be portable when necessary. Increasingly, sound source data is managed by various devices, such as copying to a music player and carrying it.
In addition, with the improvement of the functions of portable music playback devices, there is an increasing demand for a model capable of reproducing higher sound quality. In connection with this, the sound source of the music has begun to appear that the sampling frequency of CD (sampling frequency 44.1 kHz) or higher is stored with high sound quality such as 96 kHz or 192 kHz. That is, the volume of sound source data is increasing.

  Because of the above situation, it is rather rare to consolidate and manage all sound source data in one specific music playback device, and the sound source data is distributed and stored in various devices Therefore, it is necessary for the user to know in which device the sound source data to be heard is stored.

Here, Patent Document 1 has already proposed a network type content reproduction system in which a client can freely select and reproduce contents such as audio and video stored in a server.
JP 2007-140535 A

  As described in Patent Document 1, a product has been proposed in which sound source data stored in another device is acquired by a different client (playback device) and played back, so that the storage location can be used as a playback device. There is an advantage that sound source data can be reproduced without centralized management in the client.

  By the way, in order to play sound source data with different playback devices as described above, the devices need to be connected to the network, but when the number of devices increases when trying to connect to the network individually between devices. There was a problem that the work was complicated. In addition, there is no mechanism for playing music by operating them all at once in a state in which many devices that store sound source data and devices that have playback functions are connected to the network.

  The present invention has been made in view of the above problems, and can automatically search for connectable devices to establish a network connection, and a number of devices for storing sound source data and devices having a playback function are connected to the network. It is an object of the present invention to provide a music playback application program capable of playing back music in a batch operation and a graphical user interface of the program.

  Claim 1 of the present invention is a music playback application program for playing back sound source data in a music playback apparatus main body having an input means and a display and capable of network connection with other devices, wherein the network connectable device is connected to UPnP. And a function for searching using the above protocol, and arbitrary sound source data can be selected from NAS data that can be connected to the network by an operation on the music playback device main body, and this is transferred to the music playback device main body to be transmitted to the music playback device A function to execute playback of the sound source data on the main unit, and a music playback function that allows arbitrary sound source data to be selected from the data of the music playback device main body by operating the music playback device main body, and this can be connected to the network A function of transferring to an external playback device and causing the external playback device to play back the sound source data, and a network Arbitrary sound source data can be selected from the NAS data that can be connected by an operation on the music playback device main body, and the selected sound source data is transferred to an external playback device having a music playback function that can be connected to the network, and is sent to the external playback device. A music playback application program characterized in that a function for executing data playback can be realized.

  Claim 2 of the present invention is a graphical user interface of a music playback application program for playing back sound source data in a music playback device main body having an input means and a display and capable of network connection with other devices, In the screen for selecting and proceeding to the playback process, a playback unit selection icon for using a playback device selection function connected to the music playback device main body, and a music playback function among other devices connected to the network A playback device selection area in which an external playback device selection icon for using an external playback device selection function is provided, and for selecting sound source data directly stored in the storage of the music playback device main body The main unit storage sound source selection icon and the sound of other devices connected to the network A sound source data selection area in which a network sound source selection icon for selecting a sound source stored in a device having a storage capable of storing the sound source is provided, and the playback device selection area and the sound source data selection area are arranged on the same screen. It is the graphical user interface of the music reproduction application program characterized by arrange | positioning and displaying on.

  According to a third aspect of the present invention, in addition to the second aspect, in the sound source data selection area, a device having a storage capable of storing a sound source among the music playback device main body and / or other devices connected to the network. A graphical user interface of a music playback application program, wherein a high resolution sound source selection icon for extracting and selecting only sound source data classified as a high resolution audio sound source from stored sound source data is also arranged. .

  According to claim 4 of the present invention, in addition to claim 2 or 3, when any one of the icon of the playback device selection area or the icon of the sound source data selection area is selected, the option candidates are hierarchically arranged. A graphical user interface of a music playback application program, wherein a hierarchical display area to be displayed is provided on the same screen as the playback device selection area and the sound source data selection area.

  According to a fifth aspect of the present invention, in addition to the fourth aspect, when the user selects the external playback device selection icon, a candidate for an external playback device capable of playing music among other devices connected to the network is searched. It is a graphical user interface of a music playback application program characterized in that the search result is displayed in the hierarchical display area.

  According to a sixth aspect of the present invention, in addition to the fourth aspect, when the user selects the network sound source selection icon, a device having a storage capable of storing sound source data among other devices connected to the network is searched. It is a graphical user interface of a music playback application program characterized in that the search result is displayed in the hierarchical display area.

  According to the first aspect of the present invention, arbitrary sound source data can be selected from NAS data that can be connected to the network by an operation on the music playback device main body, which is transferred to the music playback device main body to be transmitted to the music playback device. A function to execute playback of the sound source data on the main unit, and a music playback function that allows arbitrary sound source data to be selected from the data of the music playback device main body by operating the music playback device main body, and this can be connected to the network A function for transferring to an external playback device and causing the external playback device to play back the sound source data, and selecting any sound source data from NAS data that can be connected to the network by operation on the music playback device body; This can be transferred to an external playback device with a music playback function that can be connected to the network, and the external playback device can play back the sound source data. Therefore, the music playback application program installed in the music playback device itself is connected to the NAS or an external playback device over the network, and the operation to play any sound source data on the network on any playback device on the network All of the operations can be performed by the playback apparatus main body, and the convenience for the user is improved.

  According to the second aspect of the present invention, a playback unit selection icon for using a playback device selection function connected to the music playback device main body and a music playback function among other devices connected to the network are provided. A main body storage sound source for selecting sound source data directly provided in the storage of the music playback device main body, provided with a playback device selection area in which an external playback device selection icon for using the selection function of the external playback device is arranged A sound source data selection area in which a selection icon and a network sound source selection icon for selecting a sound source stored in a device having a storage capable of storing a sound source among other devices connected to the network are provided. The playback device selection area and the sound source data selection area are arranged and displayed on the same screen. Is from it becomes possible to easily select a device to be used for reproducing device, it is possible to easily select the sound source data from a network connected device. In addition, since icons for making these selections are arranged on the same screen, it is possible to visually recognize where the playback device and sound source data are selected from.

  According to the third aspect of the present invention, the sound source data stored in the sound source data selection area is a music playback device main body and / or a device having a storage capable of storing a sound source among other devices connected to the network. Among them, since a high-resolution sound source selection icon for extracting and selecting only sound source data classified as a high-resolution audio sound source is also arranged, only the high-resolution sound source can be extracted and selected.

  According to the fourth aspect of the present invention, the hierarchical display area that displays the option candidates hierarchically when either the icon of the playback device selection area or the icon of the sound source data selection area is selected. Since it is provided on the same screen as the playback device selection area and the sound source data selection area, device option candidates can be displayed and selected in the hierarchical display area, and folders can be opened sequentially when searching for sound source data. It is possible to trace to the target sound source data.

  According to the fifth aspect of the present invention, when the user selects the external playback device selection icon, a search is made for a candidate for an external playback device capable of playing music from other devices connected to the network, and the search result is displayed as the search result. Since the display is made in the hierarchical display area, for example, the external playback device can be easily made by searching for and displaying available devices by performing SSDP communication with respect to devices that can recognize each other using the UPnP function. It is possible to search and display.

  According to the sixth aspect of the present invention, when the user selects the network sound source selection icon, a device having a storage capable of storing sound source data among other devices connected to the network is searched and the search result is obtained as the search result. Since it is displayed in the hierarchical display area, for example, it is easy to store on the network by searching for and displaying available devices by performing SSDP communication on devices that can recognize each other using the UPnP function. Can be searched and displayed.

It is explanatory drawing showing the graphical user interface which is an operation screen of a music reproduction application program. 2 is a block diagram showing an internal configuration of a music playback device main body 10. FIG. It is a flowchart figure showing the flow in the case of reproducing sound source data on NAS11. FIG. 5 is a flowchart showing a flow when sound source data on the NAS 11 is played back by the music playback device main body 10. FIG. 6 is a flowchart showing a flow when sound source data on the NAS 11 is played back by the external playback device 12. FIG. 6 is a flowchart showing a flow in a case where sound source data stored in a music playback device main body 10 is played back by an external playback device 12. It is a flowchart figure showing the flow of processing when a reproduction buffer becomes empty at the time of buffer reproduction processing. It is the model showing the condition where the music reproduction apparatus main body 10, NAS11, and external reproduction apparatus 12 are network-connected by a mutually compatible standard.

  The graphical user interface of the music playback application program of the present invention is a graphical user interface of a music playback application program for playing back sound source data in a music playback device main body that has an input means and a display and can be connected to other devices via a network. In the screen for selecting sound source data and proceeding to playback processing, a playback unit selection icon for using the playback device selection function connected to the music playback device main body and other devices connected to the network Sound source data provided with a playback device selection area in which an external playback device selection icon for using a selection function of an external playback device having a music playback function is arranged and directly stored in the storage of the music playback device main body Body strain for selecting A sound source data selection area in which a sound source selection icon and a network sound source selection icon for selecting a sound source stored in a device having a storage capable of storing a sound source among other devices connected to the network are provided, The playback device selection area and the sound source data selection area are arranged and displayed on the same screen. Details will be described below.

  The music playback application program according to the present invention is an application program used in an electronic device such as a smartphone, a playback device specialized for music playback, and the like (hereinafter collectively referred to as the music playback device 10), and has a hardware configuration. As a CPU, a memory, an input device such as a touch panel or a key switch, a display device such as a liquid crystal, an external storage device (storage) for storing sound source data, and an audio output unit such as a speaker or earphone output. is there. That is, it is assumed to be used in the music playback device 10 having an arithmetic processing function equivalent to that of a computer.

The music playback application program according to the present invention is a standard in which an external playback device 12 such as a network attached storage 11 (hereinafter referred to as NAS 11) or a music playback component is compatible with each other as shown in FIG. In the situation of being connected to the network, the music playback application program is used like a remote control device, and the sound source data stored in the NAS 11 is played back by the external playback device 12 or the music playback device 10, or the music The sound source data stored in the playback device 10 can be easily played back by the external playback device 12.
Note that the NAS 11 in this embodiment includes not only the literally network-attached storage but also all devices that have a storage that can store sound sources and can be connected to the network.

FIG. 2 is a block diagram showing the internal configuration of the music playback device main body 10. As shown in FIG. 2, the music playback apparatus main body 10 includes an arithmetic processing unit 13 corresponding to a CPU of a computer, a memory 14 for temporary storage such as a playback buffer, and a storage for storing sound source data and the like. 15, an input device 16 used for operation by the user, a display 17 for displaying a user interface of the music playback application program, a playback unit 18 that contributes to actual music playback, and a function for realizing network connection. The network connection unit 19 is provided.
Although not shown, the NAS 11 needs to include the arithmetic processing unit 13, the memory 14, the storage 15, and the network connection unit 19 in the music playback device main body 10.
Similarly, the external playback device 12 needs to include the arithmetic processing unit 13, the memory 14, the input device 16, the playback unit 18, and the network connection unit 19 in the music playback device main body 10. Note that the external playback device 12 may include the storage 15 and function as the NAS 11.

  As shown in FIG. 8, the music playback device main body 10, NAS 11, and external playback device 12 are configured to recognize and link to each other by network connection. As a network connection method at this time, Considering mutual recognition using a communication protocol (protocol) called UPnP (Universal Plug and Play), for example, DLNA (abbreviation of industry association called Digital Living Network Alliance, “DLNA” is a registered trademark of the organization) In addition, by adopting industry standards (guidelines) that allow products to be compatible with each other and enable network connection between electronic devices in the home, it is easy for electronic equipment that adopts industry standard standards. A method of setting up a network connection is conceivable. DLNA is a standard for LAN connection, but other communication standards may be adopted as long as it satisfies requirements for music reproduction such as transfer speed.

  Next, an operation screen when using the music playback application program of the present invention will be described. FIG. 1 is an explanatory diagram showing a graphical user interface which is an operation screen of a music playback application program. In FIG. 1, what is displayed on the display 17 of the music playback apparatus main body 10 is an example of a graphical user interface (hereinafter, GUI) by a music playback application program. As shown in FIG. 1, the music playback application program according to the present invention has a playback device selection area 20 on the GUI screen so that the playback device and playback sound source data can be selected on the same screen. And the sound source data selection area 21 are fixedly arranged. Furthermore, when performing selection using the playback device selection area 20 and the sound source data selection area 21, a hierarchical display area 22 is provided for hierarchically displaying the selection targets.

  The playback device selection area 20 is an area for selecting a playback device, and two icons are arranged as an example. One is a playback unit such as an earphone or a headphone that is directly connected to the music playback device main body 10 or a D / A conversion (digital / analog conversion) performed by the music playback device main body 10 and is used by skipping signals wirelessly. This is a “playback unit selection icon 23” used when a playback unit such as an earphone or a headphone is selected. The other is a device connected to the network, which is an “external playback device selection icon 24” for selecting an external playback device 12 that itself can perform music playback processing, such as a music playback component. When either one of these two icons is selected, a device as an option is displayed in the hierarchical display area 22, and a device to be used for reproduction is selected from among the devices. As for the options of the playback unit selection icon 23, information on the devices connected to the music playback device main body 10 (including wireless connection) is collected and displayed in the hierarchical display area 22, and the options of the external playback device selection icon 24 are selected. Displays in the hierarchy display area 22 information on the device recognized as an external playback device through a network connection such as DLNA. The selected icon is displayed differently from other icons (such as having a different color) so that it can be seen that it is in a selected state. Similarly, the selected device is displayed in a different manner from the other devices so that the selected device can be visually identified.

  The sound source data selection area 21 is an area for selecting sound source data to be reproduced. As an example, three icons are arranged. One is a “main body storage sound source selection icon 25” for selecting sound source data directly stored in the storage 15 of the music playback device main body 10. The other is a “high resolution sound source selection icon 26” for selecting sound source data classified as a high resolution audio sound source (so-called high resolution sound source). The last one is a “network sound source selection icon 27” for selecting a sound source stored in a network-connected device such as NAS11. When any one of these three icons is selected, sound source data as an option is displayed in the hierarchical display area 22, and the sound source data to be reproduced is selected from them. As for the options of the main body storage sound source selection icon 25, the information on the sound sources stored in the storage of the main body of the music playback device 10 is collected and displayed in the hierarchical display area 22, and the options of the high resolution sound source selection icon 26 are selected as music. Only the high-resolution sound source information is extracted from the storage of the main body of the playback apparatus 10 or a network-connected device and displayed in the hierarchical display area 22, and the options of the network sound source selection icon 27 are connected by a network connection such as DLNA. Sound source information is collected and displayed from devices that have storage for storing songs. The selected icon is displayed differently from other icons (such as having a different color) so that it can be seen that it is in a selected state. Similarly, the selected sound source data is visually distinguished from the other sound source data so that the selected sound source data is in a selected state. Since there may be a plurality of layers until the sound source data is reached, in each layer, the existing folders are also displayed. In the example shown in FIG. 1, the network sound source selection icon 27 is being selected, and folders 1 to 4 and sound source data of Titles 1 to 3 are displayed in the hierarchical display area 22.

  Next, the flow of processing when using the music playback application program of the present invention will be described with reference to the drawings. FIG. 3 is a flowchart showing a flow when reproducing sound source data on the NAS 11. When reproducing sound source data on the NAS 11, as shown in FIG. 3, the user first selects the network sound source selection icon 27 (S301). In response, a list of devices such as NAS 11 connected to the network is displayed in the hierarchy display area 22 (S302). For example, SSDP (Simple Service Discovery Protocol) is used for determining whether the NAS 11 is compatible with a network connection such as DLNA. When the user selects one of the devices such as NAS 11 displayed in the hierarchy display area 22 (S303), the folder and sound source data stored in the storage of the selected apparatus are displayed in the hierarchy display area 22 (S304). . When one of the displayed folder and sound source data is selected (S305), it is determined whether the selected one is a folder or sound source data (S306). If a folder is selected, the contents of the folder are displayed in a hierarchy. Therefore, the process returns to step (S304), and if sound source data is selected, the process proceeds to (S307). Finally, it is determined whether the device that reproduces the selected sound source data is the external playback device 12 or the music playback device main body 10 (S307). When the process proceeds to the reproduction process (S308) and the music reproduction apparatus body 10 reproduces, the process proceeds to the reproduction process in the music reproduction apparatus body 10 (S309).

  FIG. 4 is a flowchart showing a flow in the case where the sound source data on the NAS 11 is played back by the music playback device main body 10. If it is selected in step S309 in the flowchart of FIG. 3 to shift to the playback processing in the music playback device main body 10, the processing in FIG. 4 is started. In FIG. 4, first, a decoder is selected according to the selected sound source data (S401). This is because it is necessary to change the header analysis processing according to the file type. After selecting the decoder, data reception from the NAS 11 is started (S402). As a data acquisition method, for example, data is downloaded in units of 8192 bytes from the server using HTTP communication. Thereafter, it is determined whether the data necessary for header analysis has been read (S403). If the amount of data is insufficient, data reception is continued (S402). If data sufficient for header analysis is read, the sound source data is read. Format analysis is performed from the header (S404). As the contents of the format analysis, acquisition of the sampling rate, the number of bits, and the number of channels is an indispensable item. Based on the analysis result, it is determined whether or not the music playback device main body 10 is compatible with the format of the sound source data (S405). If the format is not supported, this is displayed (S414) and the process ends.

  If the format is compatible, buffer reproduction processing is started in parallel processing (S406). Buffer playback processing is a method of accumulating playback data in the playback buffer queue and sequentially playing it back. However, there is a limit to the amount of playback data that can be stored due to the memory capacity. It is necessary to confirm whether or not (S407). If the reproduction buffer queue is empty, data reception from the NAS 11 is continued (S408). If there is no space in the playback buffer queue, the process waits until there is space in the playback buffer queue (S409). Thereafter, the received data is decoded (S410). Then, the decoded data is added to the reproduction buffer queue (S411). It is determined whether or not the end of the sound source data being reproduced has been reached (S412). If the end has not been reached, the steps (S407) to (S412) are repeated, and reproduction is performed while adding reproduction data to the reproduction buffer queue as needed. Continue. At the stage where the end of the sound source data being reproduced is reached, the reproduction end flag of the sound source data is set to end (S413).

  FIG. 5 is a flowchart showing the flow when the external playback device 12 performs playback processing of the sound source data on the NAS 11. When it is selected in step S308 in the flowchart of FIG. 3 to shift to the reproduction process in the external reproduction apparatus 12, the process in FIG. 5 is started. In FIG. 5, first, a decoder is selected according to the selected sound source data (S501). After selecting the decoder, reception of data from the NAS 11 is started (S502). Thereafter, it is determined whether the data necessary for header analysis has been read (S503). If the amount of data is insufficient, data reception is continued (S502). If data sufficient for header analysis is read, the sound source data is read. Format analysis is performed from the header (S504). Based on the analysis result, it is determined whether or not the external playback device 12 is compatible with the format of the sound source data (S505). If the format is not supported, that effect is displayed (S512) and the process ends.

  If the format is compatible, the external playback device 12 checks whether other sound source data is currently being played back (S506). If other sound source data is being played back, the external playback device 12 is requested to stop playback (S507). Thereafter, the path information of the sound source data acquired from the NAS 11 (for example, the URL of the sound source data when using HTTP communication) is transmitted to the external playback device 12 (S508). Then, the external reproduction apparatus 12 is requested to reproduce the sound source data (S509). While the sound source data is being reproduced, the current reproduction position is acquired (S510), and it is confirmed whether the song has reached the end (S511). It ends when the song reaches the end.

  FIG. 6 is a flowchart showing a flow when the external playback device 12 performs playback processing on the sound source data stored in the music playback device main body 10. In FIG. 6, first, sound source data to be reproduced is selected from the sound source data stored in the music reproducing apparatus main body 10 (S601). When the sound source data is selected, the header information of the sound source data is read and the format analysis is performed (S602). Then, based on the format analysis result, it is determined whether or not the external playback device 12 is compatible with the format of the sound source data (S603). If the format is not supported, this is displayed (S613), and the process ends.

  If the external playback device 12 supports the format of the sound source data, it is confirmed whether or not the external playback device 12 is selected (S604). If the external playback device 12 is not selected, the music playback device main body 10 performs playback processing (S614). If the external playback device 12 is selected, it is confirmed whether or not other sound source data is currently being played back in the external playback device 12 (S605). When other sound source data is being played back, the external playback device 12 is requested to stop playback (S606). Thereafter, it is confirmed whether or not the HTTP server is activated (S607). If the HTTP server is not activated, the HTTP server is immediately activated in the music playback device main body 10 (S608). By starting up an HTTP server in the music playback device main body 10, it is possible to transfer sound source data from the music playback device main body 10 to another device. In the state where the HTTP server is activated, the URL of the selected sound source data is transmitted to the external playback device 12 (S609), and the playback of the sound source data is requested (S610). While the sound source data is being reproduced, the current reproduction position is acquired (S611), and it is confirmed whether the song has reached the end (S612). It ends when the song reaches the end.

  FIG. 7 is a flowchart showing a process flow when the reproduction buffer becomes empty during the buffer reproduction process. When the buffer reproduction process is started, first, it is confirmed whether or not data exists in the reproduction buffer queue (S701). At this time, if there is data in the reproduction buffer queue, the data in the reproduction buffer queue is sounded as sound (S702), but if there is no data in the reproduction buffer queue, silence is sounded. (S703). Thereafter, it is determined whether or not the song end flag is set (S704). If the song end flag is not set, the steps (S701) to (S704) are repeated to continuously play the song. When the end flag is set (Yes in S704), the buffer reproduction process is ended.

  As described above, by using the music playback application program of the present invention, the music playback device main body 10, the NAS 11, and the external playback device 12 are connected to each other via a network connection, and the music playback application program as shown in FIG. By operating these devices like a remote controller using a GUI, settings for playing sound source data stored in any device on other devices can be realized by operating only the music playback device main body.

  In addition, the playback device selection area and the sound source data selection area are arranged and displayed on the same screen, and the hierarchical display area is also displayed at the same time, for example, the playback displayed in the hierarchical display area. Immediately after the operation of selecting the device is completed, it is possible to select an icon existing in the sound source data selection area and shift to sound source data selection. As a result, there is an advantage that it is possible to shift to the next operation without returning to the initial operation screen, and the currently selected playback device is directly connected to the earphone or the like even while the sound source data is being selected. There is an advantage that it is possible to recognize whether the device is an external playback device or an external playback device simply by looking at the icon.

DESCRIPTION OF SYMBOLS 10 ... Music reproduction apparatus main body, 11 ... NAS, 12 ... External reproduction apparatus, 13 ... Arithmetic processing part (CPU), 14 ... Memory, 15 ... Storage, 16 ... Input device, 17 ... Display, 18 ... Reproduction unit, 19 ... Network connection unit, 20 ... playback device selection area, 21 ... sound source data selection area, 22 ... hierarchical display area, 23 ... playback unit selection icon, 24 ... external playback device selection icon, 25 ... main unit storage sound source selection icon, 26 ... high resolution Sound source selection icon, 27 ... Network sound source selection icon.

Claims (6)

A music playback application program for playing back sound source data in a music playback device main body that has an input means and a display and can be connected to other devices via a network,
A function for searching for devices that can be connected to the network using the UPnP protocol;
Arbitrary sound source data can be selected from NAS data that can be connected to the network by operating the music playback device, and this data is transferred to the music playback device and the music playback device plays the sound source data. Function to
Arbitrary sound source data can be selected from the data of the music playback device main body by an operation on the music playback device main body, which is transferred to an external playback device having a music playback function that can be connected to the network, and the sound source is sent to the external playback device A function to execute data playback,
Arbitrary sound source data can be selected from the network connectable NAS data by operating the music playback device main body, and this is transferred to an external playback device having a music playback function that can be connected to the network to the external playback device. A music playback application program capable of realizing a function for playing back sound source data. A music reproduction application program graphical user interface for reproducing sound source data in a music reproduction apparatus main body having an input means and a display and capable of being connected to other devices via a network,
In the screen for selecting sound source data and proceeding to playback processing,
To use a playback unit selection icon for using a selection function of a playback device connected to the music playback device main body, and a selection function of an external playback device having a music playback function among other devices connected to the network A playback device selection area in which an external playback device selection icon is arranged,
A main body storage sound source selection icon for selecting sound source data directly stored in the storage of the music playback device main body, and a sound source stored in a device having a storage capable of storing a sound source among other devices connected to the network A sound source data selection area with a network sound source selection icon for selecting
A graphical user interface of a music playback application program, wherein the playback device selection area and the sound source data selection area are arranged and displayed on the same screen.   In the sound source data selection area, sound source data stored in a device having a storage capable of storing a sound source among other devices connected to the music playback device and / or network is classified as a high resolution audio sound source. 2. A graphical user interface of a music playback application program according to claim 1, further comprising a high-resolution sound source selection icon for extracting and selecting only the sound source data to be selected.   When either the icon of the playback device selection area or the icon of the sound source data selection area is selected, a hierarchical display area that displays option candidates hierarchically is the playback device selection area and the sound source data selection area. 4. The graphical user interface of the music playback application program according to claim 2, wherein the graphical user interface is provided on the same screen.   When a user selects the external playback device selection icon, a search is made for candidates of external playback devices capable of playing music among other devices connected to the network, and the search result is displayed in the hierarchical display area. The graphical user interface of the music playback application program according to claim 4.   When the user selects the network sound source selection icon, a device having a storage capable of storing sound source data among other devices connected to the network is searched, and the search result is displayed in the hierarchy display area. The graphical user interface of the music playback application program according to claim 4.

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