JP6980942B1 - Playback terminal, playback method, program, recording medium, and music playback system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To organize a more natural chorus medley. SOLUTION: A reproduction terminal 10 connects and reproduces a chorus section of a music registered in a playlist. The playback terminal 10 is from the acquisition unit 11 that acquires the chorus section of the music registered in the playlist and the specific position that is relatively determined as a ratio to the total length of the music when the chorus section of the music cannot be acquired. It has a reproduction instruction unit 12 that defines a specific section as a chorus section of the music, and a reproduction unit 13 that connects and reproduces the chorus section of the music. [Selection diagram] Fig. 2

Description

The present invention relates to a playback terminal, a playback method, a program, a recording medium, and a music playback system.

In recent years, music distribution services that allow unlimited listening to music for a fixed amount have become widespread. Also known are music distribution services that allow not only professional musicians but also semi-professional or amateur musicians to post music. The video distribution service also posts a large number of music that users themselves sing, play, and have Vocaloid sing, as well as their own music. Hereinafter, it is referred to as a music distribution service including a service for distributing music and videos posted by users.

Patent No. 4243682

"Songrim", National Institute of Advanced Industrial Science and Technology, Internet <URL: https://songrium.jp/>

The music distribution service provides a wide variety of playlists such as playlists of popular songs, playlists of new songs, playlists by genre, or playlists according to user's taste. A playlist is a list containing one or more songs. The user can play the songs in the order registered in the playlist, or shuffle and play the songs registered in the playlist. The playlist can be created by the user himself, but can be provided by the business operator or a playlist created by another user can be used. By playing playlists created by businesses or other users, users can learn about new artists and new songs.

By playing only the chorus section of the music registered in the playlist in the medley, the user can quickly check the music registered in the playlist and discover his / her favorite music.

By using the technique of Patent Document 1, it is possible to analyze the structure of a musical piece and extract a rust section from the musical piece.

The super-history player of Non-Patent Document 1 plays a predetermined time in a medley from the beginning of a chorus section of a musical piece in chronological order.

In the case of a service that allows a user to post a song, there is a problem that the chorus section is not extracted at the time of uploading the song, and it is difficult to organize a chorus medley without unnaturalness. In the super-history player of Non-Patent Document 1, unanalyzed music is displayed as unanalyzed and played from a specified number of seconds.

The present invention has been made in view of the above, and an object of the present invention is to form a more natural chorus medley.

The reproduction terminal of one aspect of the present invention is a reproduction terminal that connects and reproduces the chorus sections of the music registered in the music reproduction order list, and is an acquisition unit that acquires the chorus sections of the music registered in the music reproduction order list. The acquisition unit has a playback unit that connects and reproduces the chorus sections of the music, and the acquisition unit is a specific position that is relatively determined as a ratio to the total length of the music when the chorus section of the music cannot be acquired. The specific section is defined as the chorus section of the music.

The music reproduction system of one aspect of the present invention is a music reproduction system that connects and reproduces chorus sections of music registered in the music reproduction order list, and includes a management server and a reproduction terminal, and the management server is the reproduction. It manages the music data of the music played by the terminal, acquires the chorus section of the music, and when the chorus section cannot be acquired, it is a specific section from a specific position that is relatively determined as a ratio to the total length of the music. Is defined as the chorus section of the music, and the playback terminal receives the music data of the music registered in the music reproduction order list and the chorus section of the music data, and reproduces the music by connecting the chorus sections.

According to the present invention, a more natural chorus medley can be organized.

FIG. 1 is a diagram showing an example of the overall configuration of the music reproduction system of the present embodiment. FIG. 2 is a diagram showing an example of the configuration of the reproduction terminal of the present embodiment. FIG. 3 is a sequence diagram showing an example of the processing flow of the music reproduction system. FIG. 4 is a flowchart showing an example of the flow of crossfade processing in the rust section. FIG. 5 is a diagram for explaining an example of crossfade processing. FIG. 6 is a diagram showing an example of a display screen of a playback terminal. FIG. 7 is a diagram showing an example of another configuration of the music reproduction system of the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[System configuration]
FIG. 1 is a diagram showing an example of the overall configuration of the music reproduction system of the present embodiment. The music reproduction system shown in the figure is a system including a reproduction terminal 10 and a management server 30 that sequentially connects and reproduces chorus sections of music registered in a playlist.

The distribution server 50 holds the music data and distributes the music data as requested. The distribution server 50 may receive music (musical piece) and video postings from users, retain and distribute music data and video data. The distribution server 50 may distribute only the sound data accompanying the moving image. Hereinafter, it is assumed that the music includes the sound accompanying the moving image, and the music data includes the sound data accompanying the moving image.

The analysis server 70 analyzes the music structure of the music data held by the distribution server 50, and holds the music structure data. The music structure data is data obtained by analyzing the chorus section of the music. The analysis server 70 periodically crawls the music data held by the distribution server 50, and if there is music data newly determined to be the analysis target, analyzes the music data and creates music structure data. The analysis server 70 may analyze the music data that the analysis server 70 has not determined to be the analysis target in response to an analysis request from the user. Alternatively, when the music is posted to the distribution server 50, the distribution server 50 requests the analysis server 70 to analyze the music at a predetermined timing, and the analysis server 70 analyzes the music in response to the request and obtains music structure data. You may create it.

The management server 30 manages music information related to music. For example, the management server 30 manages the content ID in association with the music name, the artist name (poster name), the length of the music, the jacket image of the music, and the music data acquisition destination information. The content ID is an identifier that identifies the music held by the distribution server 50. For example, when the management server 30 receives the content ID from the playback terminal 10, the management server 30 returns information such as a music name associated with the content ID as music information. The management server 30 transmits the content ID to the analysis server 70 to obtain the music structure data of the music indicated by the content ID. The music data acquisition destination information is information used when receiving music data distribution from the distribution server 50. By transmitting a music data request including music data acquisition destination information to the distribution server 50, the music data is distributed from the distribution server 50.

The management server 30 may manage playlists and provide them to users. For example, the playlist created by the management server 30 includes a popular song playlist in which songs that have been played a lot in a predetermined period are registered, a new song playlist in which songs newly posted within the latest predetermined period are registered, and a playlist. Alternatively, there is a playlist in which songs are registered according to the user's preference or situation. You may create the playlist yourself. The playlist is identified by the playlist ID, and the content IDs of the songs included in the playlist are arranged and managed in the order of the songs.

The playback terminal 10 receives the music data and reproduces the music. The playback terminal 10 may stream the music data, or may download the music data to a storage device included in the playback terminal 10 and then download and play the music data. When the playlist is specified by the user, the playback terminal 10 continuously plays the music registered in the playlist. The playback terminal 10 may continuously play the songs in the order registered in the playlist, or may shuffle the order and continuously play the songs in the playlist.

The playback terminal 10 has a sabi medley function. The chorus medley is a function that connects only the chorus sections of the songs in the playlist and continuously plays them. The chorus section is acquired from the music structure data held by the analysis server 70. When the chorus section cannot be acquired, the playback terminal 10 defines a specific section as a chorus section from a specific position that is relatively determined as a ratio to the total length of the music.

The playback terminal 10, the management server 30, the distribution server 50, and the analysis server 70 are communicably connected via a network. Although only one reproduction terminal 10 is shown in FIG. 1, a large number of reproduction terminals 10 actually exist. Further, in FIG. 1, the management server 30, the distribution server 50, and the analysis server 70 are shown as separate devices, but one device may have the function of each server. Each server may be configured by a plurality of devices, or each server may be configured by a virtual server on the cloud.

[Playback terminal]
Next, an example of the configuration of the reproduction terminal 10 will be described with reference to FIG. The reproduction terminal 10 shown in FIG. 2 includes an acquisition unit 11, a reproduction instruction unit 12, a reproduction unit 13, a display unit 14, and a storage unit 15. Each part included in the reproduction terminal 10 may be configured by a computer provided with an arithmetic processing unit, a storage device, and the like, and the processing of each part may be executed by a program. This program is stored in a storage device included in the reproduction terminal 10, and can be recorded on a recording medium such as a magnetic disk, an optical disk, or a semiconductor memory, or can be provided through a network.

The acquisition unit 11 acquires various data. For example, the acquisition unit 11 transmits the playlist ID to the management server 30 to acquire the list of the content IDs of the songs registered in the playlist. The acquisition unit 11 transmits the content ID to the management server 30 to acquire the music information. The acquisition unit 11 requests the distribution server 50 to distribute the music data, and acquires the music data from the distribution server 50.

Further, upon receiving the instruction of the chorus medley for the playlist, the acquisition unit 11 requests the management server 30 for the chorus section data of each of the songs in the playlist, and also requests the distribution server 50 to distribute the music data of the music to be played. do. The chorus section data includes the time stamp at the beginning of the chorus and the time stamp at the end of the chorus. Although there may be a plurality of chorus sections in one song, the chorus section data includes information of only one of the plurality of chorus sections (for example, only the first chorus section).

The reproduction instruction unit 12 instructs the reproduction unit 13 to play a musical piece according to a user's instruction or a playlist.

At the time of rust medley, the reproduction instruction unit 12 designates the section corresponding to the rust section as the reproduction section. When the chorus section cannot be acquired, the reproduction instruction unit 12 considers the specific section from the specific position relatively determined as a ratio to the total length of the music as the chorus section. For example, the playback instruction unit 12 sets any position between one-fifth and one-third of the total length of the music as the start position of the chorus section, and has any length of 15 seconds to 35 seconds. Let this be the length of the rust section. In particular, it is advisable to set the start position of the chorus section at a position one-fourth of the total length of the music and the length of the chorus section at 25 seconds. When the chorus section cannot be acquired, the playback terminal 10 determines the beginning of the chorus section as a ratio to the total length of the music, so that the time stamp at the beginning of the chorus section is different for each music, which is unnatural. You can organize a chorus medley without it. In particular, even if the playlist of new songs continues to have songs for which the chorus section cannot be acquired, a more natural chorus medley with scattered time stamps at the start of playback can be organized.

The reproduction unit 13 decodes the music data and reproduces the music. The reproduction unit 13 may reproduce the music data streamed from the distribution server 50, or may reproduce the music data stored in the storage unit 15.

When the reproduction section is designated, the reproduction unit 13 reproduces only the designated reproduction section. That is, at the time of the chorus medley, the reproduction unit 13 reproduces only the chorus section of the music, and after the chorus section is reproduced, moves to the reproduction of the chorus section of the next music.

At the time of chorus medley, the reproduction unit 13 may crossfade so that the reproduction timings of the chorus sections do not overlap in the preceding and following music. Specifically, the playback unit 13 raises the playback volume from the position before the chorus section to the beginning of the chorus section, starts lowering the playback volume after playing the chorus section, and plays the next song after playing the chorus section. Start.

At the time of chorus medley, for each song in the playlist, the reproduction section may be from the beginning of the song to the end of the chorus section. The playback time of each song in the playlist is longer than when playing only the chorus section, but by playing from the beginning of the song to the chorus, the playlist is played with a different impression than when playing only the chorus section. can.

The display unit 14 provides a user interface. For example, the display unit 14 displays a music name, an artist name, and a jacket image of the music currently being played. The display unit 14 accepts operations for the music currently being played, such as pausing and resuming playback, rewinding, and postponing.

The display unit 14 may display a list of playlists and accept playlist selection. For example, the playback terminal 10 receives information on a large number of playlists such as popular song playlists, new song playlists, and playlists for each genre from the management server 30. The display unit 14 displays a list of received playlists and receives a playback instruction in normal playback, shuffle playback, or sabi medley. The playback terminal 10 plays the music in the playlist in a format according to the playback instruction from the user.

The storage unit 15 stores playlist information, music information, and chorus section data. In order to be able to listen to the music offline, the storage unit 15 may store the music data.

[motion]
Next, an example of the processing flow of the music reproduction system will be described with reference to FIG. It is assumed that the user selects a playlist and inputs an instruction to play the playlist in the sabi medley to the playback terminal 10. The playback terminal 10 has already acquired a list of content IDs of songs included in the playlist.

In step S101, the playback terminal 10 selects the next music to be played from the playlist. To play the playlist in order, select from the first song in the playlist. If you want to shuffle and play the songs in the playlist, randomly select from the songs that have not been played yet. In the case of sabi medley, you may select songs in the order of the playlist.

In step S102, the playback terminal 10 transmits a music information request including the content ID of the selected music to the management server 30.

In step S103, the playback terminal 10 receives music information from the management server 30. The music information includes information displayed on the screen as a music being played and information for receiving distribution from the distribution server 30.

In step S104, the playback terminal 10 transmits a chorus section data request including the content ID of the selected music to the management server 30.

In step S105, the management server 30 transmits the music structure data request including the content ID to the analysis server 70.

In step S106, the management server 30 receives the music structure data from the analysis server 70.

In step S107, the management server 30 creates chorus section data to be returned to the playback terminal 10 from the music structure data. The chorus section data includes the start time stamp and the end time stamp of the chorus section.

In step S108, the management server 30 returns the chorus section data to the reproduction terminal 10. If the chorus section data cannot be created from the music structure data, the management server 30 returns the message without the chorus section data to the playback terminal 10.

In step S109, the reproduction terminal 10 determines whether or not the rust section data has been acquired.

When the chorus section data cannot be acquired, in step S110, the playback terminal 10 determines a specific section as a chorus section from a specific position that is relatively determined as a ratio to the total length of the music.

In step S111, the playback terminal 10 requests the distribution server 50 to distribute the music data. When the reproduction terminal 10 holds the music data, the music data held by the reproduction terminal 10 may be used.

In step S112, the distribution server 50 starts distribution of the music data to the reproduction terminal 10.

In step S113, the playback terminal 10 reproduces only the chorus section of the music according to the chorus section data.

When the reproduction position reaches the end of the chorus section, the reproduction terminal 10 repeats the process from step S101 for the next music. The playback terminal 10 repeats the processes from step S101 to step S113 for each of the songs in the playlist, and reproduces the playlist in the sabi medley.

Next, an example of the crossfade processing of the rust section will be described with reference to FIGS. 4 and 5.

In step S201, the playback terminal 10 starts playing the music from the playback position before the chorus section with the volume minimized. FIG. 5 shows an example of crossfading from song A to song B. In FIG. 5, the horizontal axis represents time and the vertical axis represents volume. In the example of FIG. 5, the reproduction of the song A is started from t0 before the chorus section of the song A with the volume minimized. t0 is not the beginning of the song A, but the reproduction position before the chorus section (t1 to t2) of the song A.

In step S202, the playback terminal 10 raises the volume to a specified volume by the rust section. In the example of FIG. 5, the volume is raised to the specified volume from t0 to t1 at the beginning of the chorus section of the song A. The specified volume may be reached before t1. The specified volume is the volume specified by the user.

In step S203, the reproduction terminal 10 reproduces the rust section at a predetermined volume. In the example of FIG. 5, t1 to t2 are chorus sections of song A.

In step S204, the reproduction terminal 10 starts to lower the volume after the reproduction position exceeds the end of the rust section. The playback terminal 10 lowers the volume of the current song so that the volume of the current song is minimized before the playback position of the next song enters the chorus section. In the example of FIG. 5, the volume of the song A starts to be lowered from the end t2 of the chorus section of the song A.

In step S205, the playback terminal 10 starts playing the chorus section of the next song after the playback position of the current song exceeds the end of the chorus section. The next song is also processed in order from step S201, and the volume is gradually increased from the playback position before the chorus section to play. In the example of FIG. 5, the reproduction of the song B is started from t3 after the end t2 of the chorus section of the song A. Like song A, song B also starts playing song B with the volume minimized from t3 before the chorus section (t5 to t6) of song B.

In step S206, the reproduction terminal 10 stops the reproduction of the current music before the reproduction position of the next music enters the chorus section. In the example of FIG. 5, the reproduction of the song A is stopped at t4 before the beginning t5 of the chorus section of the song B.

The playback terminal 10 determines an interval between songs and a chorus section of a song (interval from t2 to t5 in FIG. 5), and fades in and out each song within the interval. This makes it possible to naturally connect songs and to hear the chorus section of each song more clearly.

[interface]
Next, an example of the display screen of the reproduction terminal 10 will be described with reference to FIG.

The display screen 100 shown in FIG. 6 includes a jacket image display area 110, an artist name display field 111, and a music name display field 112 as areas for showing information on the music being played. The jacket image of the music is displayed in the jacket image display area 110. If the music is a sound that accompanies the video, a thumbnail image of the video may be displayed. In the artist name display field 111, the name of the artist who is playing the music is displayed. The name of the poster of the music may be displayed in the artist name display field 111. The name of the music is displayed in the music name display field 112. The title of the moving image may be displayed in the music name display field 112.

Further, the display screen 100 includes a reproduction position display bar 120 corresponding to the entire length of the music and indicating the reproduction position 122. The reproduction time indicating the current reproduction position is displayed on the left side of the reproduction position display bar 120, and the time indicating the length of the song is displayed on the right side.

In the case of rust medley, the reproduction range 121 corresponding to the rust section to be reproduced is superimposed on the reproduction position display bar 120 and displayed. This makes it possible to know where the chorus section you are listening to is in a song and how soon you will move on to the next song.

The display screen 100 includes a pause button 130, a return button 131, a feed button 132, and an add button 133 as buttons for accepting user operations. Of course, buttons with functions other than the above may be provided.

The pause button 130 is a button for pausing the playback of the music. When the pause button 130 is pressed, the playback of the music is paused. During the pause, a play button (not shown) is displayed at the same position instead of the pause button 130. When the play button is pressed, the pause is released and the music is restarted.

The return button 131 is a button for returning the playback position to the beginning of the current music. When the playback position of the music when the return button 131 is pressed is near the beginning of the music (for example, within 2 to 3 seconds from the beginning), the music is returned to the previous music and played.

When the return button 131 is pressed during the chorus medley, the music may be played from the beginning of the chorus section of the current song. Alternatively, when the return button 131 is pressed during the chorus medley, the music may be played from the beginning. For example, when the user hears the chorus and there is a song that he / she is interested in, when the return button 131 is touched (pressed), the song is played from the beginning.

The feed button 132 is a button for moving to the next song.

At the time of chorus medley, a button (not shown) for listening to the music in full is arranged in the display screen 100, and when that button is pressed, even if the music playing the chorus is replayed from the beginning to the end of the music. good. Alternatively, if the button is pressed during playback of the chorus, the music may be continuously played from the chorus section to the end of the music without moving to the next music even if the playback position reaches the end of the chorus section. ..

The add button 133 is a button for adding the current music to its own library or playlist. If you press the add button 133 when you find a song you are interested in in Sabi Medley, the song will be added to the library and you can listen to it again later.

During the reproduction of the music for which the rust section data could not be acquired, the reproduction position display bar 120 or the reproduction range 121 may be displayed in different colors to inform the user whether or not the rust section data has been acquired. Further, a link (button) to the analysis request transmission form may be provided in the display screen 100 during playback of the music for which the chorus section data could not be acquired. By operating this link, the user can easily send the analysis request of the music data to the analysis server 70.

[Another system configuration]
Next, with reference to FIG. 7, an example of another configuration of the music reproduction system of the present embodiment will be described. In the music reproduction system of FIG. 7, the management server 30 organizes a chorus medley from a playlist, connects the chorus sections, and transmits the chorus medley information for reproduction to the reproduction terminal 10.

The management server 30 shown in FIG. 7 includes an acquisition unit 31, a transmission unit 32, and a storage unit 33.

The acquisition unit 31 acquires the playlist from the storage unit 33, acquires the music structure data of the music registered in the playlist from the analysis server 70, extracts the chorus section data, and choruses the music included in the playlist. Organize a medley. When the chorus section cannot be acquired, the acquisition unit 31 defines a specific section as a chorus section from a specific position that is relatively determined as a ratio to the total length of the music.

The transmission unit 32 transmits the sabi medley information to the reproduction terminal 10. The sabi medley information is, for example, a list of a set of music information (which may be a content ID) and sabi section data for each song of the sabi medley.

The storage unit 33 stores playlists and music information. The storage unit 33 may store the music information including the chorus section data acquired from the analysis server 70. The acquisition unit 31 may acquire the music structure data from the analysis server 70 when the chorus section data is not stored in the storage unit 33.

The management server 30 may have the function of the analysis server 70, and the management server 30 itself may analyze the music and extract the chorus section data.

The reproduction terminal 10 of FIG. 7 includes a reproduction unit 13, a display unit 14, and a reception unit 16.

The reproduction unit 13 and the display unit 14 are the same as the reproduction terminal 10 shown in FIG.

The receiving unit 16 instructs the reproducing unit 13 of the music to be reproduced and the reproduction section based on the sabi medley information received from the management server 30.

As described above, the reproduction terminal 10 of the present embodiment connects and reproduces the chorus sections of the music registered in the playlist. The playback terminal 10 is from the acquisition unit 11 that acquires the chorus section of the music registered in the playlist and the specific position that is relatively determined as a ratio to the total length of the music when the chorus section of the music cannot be acquired. It has a reproduction instruction unit 12 that defines a specific section as a chorus section of the music, and a reproduction unit 13 that connects and reproduces the chorus section of the music. As a result, even if the chorus section of the music in the playlist cannot be acquired, a more natural chorus medley can be organized.

The playback terminal 10 of the present embodiment raises the playback volume from the position before the chorus section to the beginning of the chorus section, starts lowering the playback volume after playing the chorus section, and starts playing the next song after playing the chorus section. do. As a result, when the chorus sections of the music are connected and played, the chorus sections of the preceding and following songs do not overlap, so that the chorus sections of the music can be naturally connected and played.

10 ... Playback terminal 11 ... Acquisition unit 12 ... Playback instruction unit 13 ... Playback unit 14 ... Display unit 15 ... Storage unit 16 ... Reception unit 30 ... Management server 31 ... Acquisition unit 32 ... Transmission unit 33 ... Storage unit 50 ... Distribution server 70 … Analysis server

Claims (11)

It is a playback terminal that connects and plays the chorus sections of the songs registered in the song playback order list.
The acquisition unit that acquires the chorus section of the music registered in the music playback order list,
It has a playback unit that connects and plays the chorus sections of the music.
The acquisition unit is a playback terminal that defines a specific section as a chorus section of the music from a specific position that is relatively determined as a ratio to the total length of the music when the chorus section of the music cannot be acquired. The playback terminal according to claim 1.
The acquisition unit sets any position between 1/5 and 1/3 of the total length of the music as the start position of the chorus section, and has any length between 15 seconds and 35 seconds. A playback terminal whose length is the length of the chorus section. The playback terminal according to claim 1 or 2.
The reproduction unit raises the reproduction volume from a position before the rust section to the beginning of the rust section, starts to decrease the reproduction volume after reproducing the rust section, and reproduces the next song after reproducing the rust section. Playback terminal to start. The playback terminal according to any one of claims 1 to 3.
A reproduction terminal including a display unit which displays the total length and the reproduction position of the music being reproduced and displays the section of the total length to be reproduced by the reproduction unit. The playback terminal according to any one of claims 1 to 4.
The reproduction unit is a reproduction terminal that connects and reproduces a section from the beginning of the music to the end of the chorus section. The playback terminal according to any one of claims 1 to 5.
The reproduction unit is a reproduction terminal that reproduces the music from the beginning of the music being reproduced in the chorus section according to the operation of the user. The playback terminal according to any one of claims 1 to 6.
The reproduction unit is a reproduction terminal that reproduces the music being reproduced in the chorus section to the end of the music according to the user's operation. It is a playback method that connects the chorus sections of the songs registered in the song playback order list and plays them.
By computer
The step to acquire the chorus section of the music registered in the music playback order list, and
When the chorus section of the music cannot be acquired, the step of defining the specific section from the specific position, which is relatively determined as a ratio to the total length of the music, as the chorus section of the music, and
A reproduction method including a step of connecting and reproducing the chorus sections of the music based on the chorus sections of the music. The process of acquiring the chorus section of the music registered in the music playback order list, and
When the chorus section of the music cannot be acquired, the process of defining the specific section from the specific position, which is relatively determined as a ratio to the total length of the music, as the chorus section of the music.
A program that causes a computer to execute a process of connecting and playing a chorus section of a song based on the chorus section of the song. The process of acquiring the chorus section of the music registered in the music playback order list, and
When the chorus section of the music cannot be acquired, the process of defining the specific section from the specific position, which is relatively determined as a ratio to the total length of the music, as the chorus section of the music.
A recording medium recording a program that causes a computer to execute a process of connecting and playing back the chorus sections of the music based on the chorus sections of the music. It is a music playback system that connects and plays the chorus sections of the music registered in the music playback order list.
Equipped with a management server and playback terminal
The management server manages the music data of the music played by the playback terminal, acquires the chorus section of the music, and when the chorus section cannot be acquired, it is relatively determined as a ratio to the total length of the music. A specific section from the specific position to be played is defined as the chorus section of the song.
The playback terminal is a music playback system that receives music data of a music registered in a music playback order list and a chorus section of the music data, and connects the chorus sections to play the music.

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