WO2023062721A1 - Dispositif acoustique, procédé de commande de dispositif acoustique et programme - Google Patents

Dispositif acoustique, procédé de commande de dispositif acoustique et programme Download PDF

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Publication number
WO2023062721A1
WO2023062721A1 PCT/JP2021/037741 JP2021037741W WO2023062721A1 WO 2023062721 A1 WO2023062721 A1 WO 2023062721A1 JP 2021037741 W JP2021037741 W JP 2021037741W WO 2023062721 A1 WO2023062721 A1 WO 2023062721A1
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WO
WIPO (PCT)
Prior art keywords
playback speed
tempo
change
range
tempo slider
Prior art date
Application number
PCT/JP2021/037741
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English (en)
Japanese (ja)
Inventor
崇 眞下
七生 ▲高▼城
Original Assignee
ＡｌｐｈａＴｈｅｔａ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ＡｌｐｈａＴｈｅｔａ株式会社 filed Critical ＡｌｐｈａＴｈｅｔａ株式会社
Priority to JP2023553796A priority Critical patent/JPWO2023062721A1/ja
Priority to PCT/JP2021/037741 priority patent/WO2023062721A1/fr
Publication of WO2023062721A1 publication Critical patent/WO2023062721A1/fr

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the present invention relates to an audio device, an audio device control method, and a program.
  • DJ equipment such as a DJ controller has a plurality of decks, and by switching the audio output between the decks while playing music on each deck, the music being played is switched to another music.
  • DJ equipment such as a DJ controller
  • the BPM is changed by about 20 to 30, for example, a relative mode that can be operated based on the relative position of the tempo slider instead of the absolute position has been considered (see, for example, Non-Patent Document 1).
  • the tempo is adjusted based on the relative position of the tempo slider while the SHIFT button is pressed, and the absolute position of the tempo slider is adjusted when the SHIFT button is not pressed. Adjusting tempo based on position. Therefore, when executing the relative mode, it is necessary for the user to operate with both hands in order to keep pressing the SHIFT button. In addition, there is a problem that when an operation error related to the SHIFT button occurs, such as pressing the wrong SHIFT button, an abnormal sound is generated or the sound is suddenly changed.
  • a sound device equipped with a tempo slider that changes the playback speed of a piece of music being played comprising an operation unit that accepts a user operation to change the range of change in the playback speed that can be changed by the tempo slider, and a user operation by the operation unit. and a setting unit configured to set a range of change of the reproduction speed by the tempo slider according to the reproduction speed at the time of user's operation, when receiving the .
  • the setting unit sets the range of change of the playback speed by the tempo slider according to the ratio between the playback speed of the original song of the song being played and the playback speed at the time of user operation. sound device.
  • the operation unit further accepts a user operation to set a mode for synchronizing the tempos of at least two pieces of music, and the setting unit accepts a user operation to change the range of change after setting the mode, playback using the tempo slider.
  • the acoustic device according to any one of [1] to [3], wherein the range of change is set according to the reproduction speed at the time of user operation for changing the range of speed change.
  • the operation unit accepts a user operation to set a mode for synchronizing the tempos of at least two songs, and the setting unit accepts a user operation to set the mode, and playback after the user operation to set the mode.
  • the audio device according to any one of [1] to [3], wherein the tempo slider sets the range of change in playback speed according to the speed.
  • a control method for a sound device provided with a tempo slider that changes the playback speed of a piece of music being played comprising: receiving a user operation to change the variable range of the playback speed that can be changed by the tempo slider;
  • a method of controlling a sound device comprising: upon receiving, setting a range of change in reproduction speed by a tempo slider according to a reproduction speed at the time of user's operation.
  • a program for causing a computer to function as an audio device comprising: a setting unit for setting a range of change in playback speed by a tempo slider according to the playback speed at the time of user operation when a user operation is received by the operation unit.
  • the audio device provided with the tempo slider for changing the playback speed of the song being played, when a user operation to change the changeable range of the playback speed by the tempo slider is received, playback at the time of the user operation is performed.
  • the range of change according to the speed, it is possible to perform tempo adjustment with intuitive operation and high operability.
  • FIG. 1 is a schematic diagram showing an acoustic device according to an embodiment of the present invention
  • FIG. 1 is a block diagram showing a schematic functional configuration of an acoustic device according to one embodiment of the present invention
  • FIG. 4 is an enlarged view of the vicinity of the tempo slider in one embodiment of the present invention
  • FIG. 4B is another close-up view of the vicinity of the tempo slider in one embodiment of the present invention
  • 4 is a flow chart showing a control method according to an embodiment of the invention
  • FIG. 1 is a schematic diagram showing an acoustic device in one embodiment.
  • a sound device 1 is a DJ system in which two players 2A and 2B that reproduce music and a mixer 3 that controls the players 2A and 2B are integrated.
  • the audio device 1 functions as an audio reproduction device and an audio reproduction control device by a user's operation, reproduces music, and applies various effects to the music being reproduced.
  • the effects include, for example, effects such as delay, echo, reverb, or loop, which are applied to music to reproduce the effect sound, and effects for processing and reproducing the original sound.
  • Effects that process and reproduce the original sound include effects that change the pitch of the original sound, such as pitch, and effects that filter and reproduce a specific frequency band of the original sound, such as filters. included.
  • the audio device 1 includes, as shown in FIG. 1, operation units 21A and 21B provided on the players 2A and 2B, respectively, and an operation unit 31 provided on the mixer 3. As shown in FIG. 21 A of operation parts receive user operation with respect to the player 2A, and the operation part 21B receives user operation with respect to the player 2B. Further, the operation unit 31 receives user operations on the mixer 3 .
  • the operation unit 21A includes a jog dial 211A, a tempo slider 212A, a cue button 213A, a play/pause button 214A, a performance pad 215A, a takeover button 216A, a BEAT SYNC button 217A, and a MASTER button 218A.
  • the jog dial 211A is a dial that functions as a rotary operator and is used when setting the playback direction and playback speed of the music being played by the player 2A.
  • the tempo slider 212A is a lever that adjusts the playback speed of the song being played by the player 2A.
  • the tempo slider 212A is slid upward in FIG. 1 to slow down the playback speed of the original song, and is slid downward in FIG. 1 to speed up the playback speed of the song. slide operation.
  • the cue button 213A is a button that is pressed when setting a predetermined position of a piece of music as a cue point.
  • the play/pause button 214A is a button that is pressed when the player 2A starts or stops playing music.
  • Performance pad 215A is a general-purpose operator to which various functions relating to playback control can be assigned.
  • the takeover button 216A is a button that is pressed during an operation to change the variable range of the playback speed that can be changed by the tempo slider 212A.
  • the details of the process of changing the variable range of the playback speed that can be changed by the tempo slider 212A (hereinafter referred to as the setting process of the tempo slider 212A) will be described later.
  • the takeover button 216A may be a dedicated operator as illustrated in FIG. 1, or may be configured to use an existing operator.
  • the BEAT SYNC button 217A is a button that is pressed when executing the BEAT SYNC process for synchronizing the tempos of the songs being reproduced by the players 2A and 2B.
  • the MASTER button 218A is a button that is pressed when one of the players 2A and 2B is set as the master deck, or when the tempo slider 212A is used to change the variable range of the playback speed.
  • the operating section 21B includes a jog dial 211B, a tempo slider 212B, a cue button 213B, a play/pause button 214B, a performance pad 215B, a takeover button 216B, a BEAT SYNC button 217B, and a MASTER button 218B, similarly to the operating section 21A. Then, for example, when the operation unit 21A of the player 2A is operated by the user, the audio device 1 reproduces the music loaded in the player 2A and applies an effect to the music being reproduced. The same is true for player 2B.
  • the mixer 3 switches music playback between the players 2A and 2B, adjusts the volume of each channel, and performs playback with effects applied, according to user operations.
  • the operation unit 31 of the mixer 3 includes effect selection knobs 311A and 311B, effect amount adjustment knobs 312A and 312B, channel faders 313A and 313B, and a cross fader 314.
  • Effect selection knobs 311A and 311B are knobs used when selecting effects to be applied to music being reproduced by players 2A and 2B, respectively.
  • Effect amount adjustment knobs 312A and 312B are knobs used when adjusting parameters such as the depth and magnitude of the effect applied to the music being reproduced by the players 2A and 2B, respectively.
  • Channel faders 313A and 313B are levers used to adjust the output sound volume level of the music being reproduced by the players 2A and 2B, respectively.
  • the crossfader 314 is a lever used when switching the output volume level of the music output from the players 2A and 2B.
  • the operation units 21A and 21B and the operation unit 31 may further include a touch panel or the like for detecting the touched position by the user, in addition to the respective configurations described above.
  • FIG. 2 is a block diagram showing a schematic functional configuration of the acoustic device according to one embodiment.
  • the acoustic device 1 includes a music data storage section 4, a control section 5, and an audio output section 6, as shown in FIG. 2, in addition to the respective sections described above.
  • the functions of the above units are realized by a processor operating according to a program in, for example, an acoustic device having a computer hardware configuration. The function of each unit will be further described below.
  • the music data storage unit 4 is configured to be able to store music data using a HDD (Hard Disk Drive), flash memory, or the like.
  • the song data storage unit 4 stores song data of a plurality of songs in a predetermined format such as MP3 format.
  • the song data includes, in addition to audio information, information such as BPM, artwork, title, artist name, album name, key, number of DJ plays, and genre of the song as tag information.
  • the music data stored in the music data storage unit 4 is associated with a time stamp, which is reproduction position information.
  • the control unit 5 is implemented in the audio device 1 by, for example, a communication interface, a processor such as a CPU (Central Processing Unit), and a memory serving as a work area, and controls the operation of the audio device 1.
  • the control unit 5 includes a setting unit 51 implemented by the processor operating according to a program stored in a memory or received via a communication interface, a tempo detection unit 52, a first playback unit 53, a 2 playback unit 54 .
  • the control unit 5 detects user operations on the operation units 21A, 21B, and the operation unit 31, and supplies information indicating the contents of the user operations to each unit within the control unit 5.
  • the setting unit 51 When the setting unit 51 receives a user operation related to setting processing related to the tempo slider 212A, the setting unit 51 sets the range of change in the reproduction speed of the tempo slider 212A in accordance with the music reproduction speed at the time of the user's operation.
  • the tempo detector 52 detects the tempo of the music being reproduced by the players 2A and 2B.
  • the first reproduction unit 53 reproduces music on the player 2A and outputs audio signals to the audio output unit 6 .
  • the second reproduction unit 54 reproduces music on the player 2B and outputs audio signals to the audio output unit 6 .
  • the first playback unit 53 applies effects to the music being played by the player 2A
  • the second playback unit 54 applies effects to the music being played by the player 2B.
  • the audio device 1 may be configured to have a communication interface, acquire music data stored in an external storage device, a computer, or the like via a communication interface (not shown) and store the music data in the music data storage unit 4 .
  • the music data storage unit 4 is not included in the audio device 1 , and the external storage device functions as the music data storage unit 4 .
  • the audio output unit 6 has an audio output terminal such as a speaker terminal or a headphone terminal, and outputs audio signals of songs reproduced by the first reproduction unit 53 and the second reproduction unit 54 as audio information.
  • variable range of the playback speed that can be changed by operating the tempo slider is basically fixed, and can be preset to ⁇ 6, 10, 16, 100%, etc. by operating the MASTER button 218A, for example.
  • 3A and 3B are enlarged views of the vicinity of tempo slider 212A in one embodiment.
  • the tempo slider 212A of the player 2A will be described below.
  • a takeover button 216A, a BEAT SYNC button 217A, and a MASTER button 218A are provided near the tempo slider 212A.
  • lighting sections 219A and 220A are provided at positions corresponding to the movable ends on both sides of the tempo slider 212A.
  • the first playback unit 53 changes the playback speed of the playback music according to the operation. In other words, the tempo adjustment of the reproduced music is performed manually.
  • the first playback unit 53 and the second playback unit 54 synchronize the tempo of the song being played by the players 2A and 2B, respectively.
  • BEAT SYNC processing for synchronizing the In other words, the tempo adjustment of the reproduced music is performed automatically.
  • the BEAT SYNC processing since various known techniques can be used, detailed description thereof will be omitted.
  • the setting unit 51 sets the range of change in playback speed by the tempo slider 212A according to the playback speed at the time the takeover button 216A is operated by the user.
  • the setting unit 51 sets the playback speed variation range of the tempo slider 212A to -30% (upper movable end) to +30% (lower movable end).
  • the user can change the change range of the playback speed by the tempo slider 212A to a suitable change range according to the current playback speed simply by turning on the takeover button 216A. can. Therefore, fine adjustment of the tempo can be easily performed.
  • the range of change in the playback speed by the tempo slider 212A is the ratio of the playback speed of the original song being played to the playback speed when the takeover button 216A is turned on (BPM value). ratio), or may be set according to the difference (difference in BPM value) between the playback speed of the original song of the song being played and the playback speed when the takeover button 216A is turned on. good too. Also, the ratio and difference of BPM values may be combined for setting, or the method for setting the change range of the playback speed by the tempo slider may be switched according to the user's designation or various conditions.
  • the variation range of the reproduction speed by the tempo slider 212A may be set according to the difference in the reproduction speed of the songs being reproduced by the players 2A and 2B. For example, if the difference in playback speed between the songs being played back by the players 2A and 2B is small, the tempo slider 212A can be used to set the variation range of the playback speed according to the difference in playback speed, thereby enabling finer adjustment. can be made possible.
  • the control unit 5 temporarily disables the operation of the tempo slider 212A, and instructs the user to match the operation position of the tempo slider 212A with the playback speed of the music being played. Take action to prompt.
  • "disabling” means that the tempo slider 212A can be physically operated, but the playback speed is not changed based on the operation of the tempo slider 212A.
  • the control unit 5 lights the lighting unit 219A corresponding to the upper movable end
  • the lighting portion 220A corresponding to the lower movable end is lit.
  • the lighting section 220A corresponding to the lower movable end of the tempo slider 212A is lit.
  • control unit 5 determines whether or not the tempo slider 212A has been slid to the movable end where the lighting unit 219A or 220A is lit. Validate the operation of the slider 212A.
  • enabling means that the tempo slider 212A can be physically operated, and that the playback speed is changed based on the operation of the tempo slider 212A.
  • the user after turning on the takeover button 216A, the user simply slides the tempo slider 212A so as to press it against the movable end where the lighting section 219A or 220A is lit, and the range of change in the playback speed by the tempo slider 212A is It is possible to change the range of change to a suitable change range according to the current playback speed, and to match the operation position of the tempo slider 212A with the playback speed of the playback music.
  • the sliding operation of pressing the tempo slider 212A against the movable end in this way is a simple operation that does not require delicacy, so the user's operational burden is small, and the possibility of erroneous operation is low.
  • the range of change in the playback speed by the tempo slider 212A is changed to a suitable range of change according to the current playback speed.
  • the tempo slider 212A is slid to the movable end where the lighting portion 219A or 220A is lit, the operating position of the tempo slider 212A and the reproduction speed of the reproduced music match.
  • the user simply turns on the takeover button 216 and slides the tempo slider 212A to the movable end to change the range of change in the playback speed of the tempo slider 212A to a suitable range of change according to the current playback speed.
  • the operating position of the tempo slider 212A and the playback speed of the playback music can be matched. Therefore, the user can easily operate with one hand or both hands, and can simultaneously perform operations other than tempo adjustment, such as effect operations.
  • the user can easily operate with one hand or both hands, and can simultaneously perform operations other than tempo adjustment, such as effect operations.
  • tempo adjustment such as effect operations.
  • by temporarily disabling the operation of the tempo slider 212A until the operation position of the tempo slider 212A and the reproduction speed of the reproduced music are matched abnormal sound output may occur or the sound output may suddenly change. You can reduce the problem of doing.
  • the tempo adjustment state can be grasped intuitively and instantaneously.
  • the ON operation of the takeover button 216A indicating the user operation of changing the range of change in the playback speed by the tempo slider 212A is performed.
  • the example of performing a series of processes has been shown, but the present invention is not limited to this example.
  • the BEAT SYNC button 217A for setting the BEAT SYNC process (mode) is turned on, a series of processes may be executed without waiting for the takeover button 216A to be turned on.
  • the change range described above may be set according to the playback speed of player A when the BEAT SYNC process (mode) is completed.
  • the tempo slider 212A sets the range of change in the playback speed according to the playback speed after the BEAT SYNC button 217A is turned on, so that the user's operation can be controlled. Furthermore, it is possible to meet the demands of users who are beginners and users who wish to simultaneously perform operations other than tempo adjustment, such as effect operations. It is possible to select whether only the ON operation of the BEAT SYNC button 217A for setting the BEAT SYNC processing (mode) is to be the trigger or the ON operation of the takeover button 216A after setting the BEAT SYNC processing (mode) is to be the trigger. It may be possible, or only one of them may be executable. If only the ON operation of the BEAT SYNC button 217A is the trigger, for example, the present invention can be similarly applied to a configuration without the takeover button 216A described in this embodiment.
  • FIG. 4 shows a flowchart of setting processing for the tempo slider 212A.
  • setting processing regarding the tempo slider 212A during playback of music on the player 2A will be described.
  • the BEAT SYNC button 217A is turned on (step S101 YES)
  • the first playback unit 53 and the second playback unit 54 execute BEAT SYNC processing for synchronizing the tempos of the songs being played by the players 2A and 2B, respectively. (step S102).
  • step S104 the control unit 5 disables the operation of the tempo slider 212A (step S104), and adjusts the playback speed according to the playback speed when the takeover button 216A is turned on. , set the range of change in the playback speed by the tempo slider 212A (step S105), and light the lighting section 219A or the lighting section 220A according to the playback speed when the takeover button 216A is turned on and the playback speed of the original song. (step S106). Note that the processing from steps S104 to S106 may be performed simultaneously, or may be performed in a different order.
  • the control unit 5 determines whether or not the tempo slider 212A has been slid to the movable end where the lighting unit 219A or 220A is lit. The operation is validated (step S108), and the lighting section 219A or the lighting section 220A that was lit in step S106 is turned off (step S109). Note that the processes of steps S108 and S109 may be executed simultaneously, or may be executed in a different order. As described above, when only the ON operation of the BEAT SYNC button 217A is used as a trigger, the determination of the ON operation of the takeover button 216A described in step S103 may be skipped.
  • the tempo slider 212A of the player 2A has been described as an example, but similar processing is performed for the tempo slider 212B of the player 2B. That is, a takeover button 216B is provided near the tempo slider 212B, and a BEAT SYNC button 217B and a MASTER button 218B are provided. Furthermore, lighting sections 219B and 220B are provided at positions corresponding to the movable ends on both sides of the tempo slider 212B (see FIG. 1).
  • the setting unit 51 sets the range of change in the reproduction speed by the tempo slider 212B according to the reproduction speed when the takeover button 216B is turned on. . Then, the control unit 5 temporarily disables the operation of the tempo slider 212B, and lights the lighting unit 219B when the playback speed when the takeover button 216B is turned on is slower than the playback speed of the original song. , the lighting unit 220B is turned on when the reproduction speed is faster than the original music. Further, the control unit 5 determines whether or not the tempo slider 212B has been slid to the movable end where the lighting unit 219B or 220B is lit. 212B operation.
  • the range of change in playback speed by the tempo slider is set according to the playback speed at the time of user operation. Therefore, intuitive operation is possible, and tempo adjustment with high operability can be realized. Further, according to one embodiment of the present invention, the range of change in playback speed by the tempo slider is set according to the difference between the playback speed of the original song of the song being played and the playback speed at the time of user's operation.
  • the range of change in playback speed by the tempo slider is set according to the ratio between the playback speed of the original song of the song being played and the playback speed at the time of user's operation. Therefore, it is possible to easily set a suitable range of change according to the relationship between the reproduction speed of the original song and the current reproduction speed.
  • the user operation to change the range of change in the playback speed by the tempo slider when a user operation to change the range of change in the playback speed by the tempo slider is received after setting the mode for synchronizing the tempos of at least two songs, the user operation to change the range of change is accepted.
  • the range of change when receiving a user operation to set a mode for synchronizing the tempos of at least two songs, the range of change is changed according to the playback speed after the user operation for setting the mode. set. Therefore, when setting the BEAT SYNC process for synchronizing the tempos of the songs being played on the players 2A and 2B, the range of playback speed change can be automatically set using a suitable tempo slider, thus reducing user operations. be able to.
  • the acoustic device having the above functions is not limited to the examples described in the above embodiments, and may be, for example, a mixer, a DJ controller having a mixer function, or the like.
  • the present invention may be applied to computers, smartphones, and tablet terminals that execute DJ applications. In such a case, a similar effect can be obtained even in an acoustic device that does not have a tempo slider member.
  • the present invention may be applied not only to DJ equipment and DJ applications, but also to music applications, streaming services using the Internet, and the like. In such a case, the present invention can be applied to, for example, automatic playback using a playlist or the like.
  • the two-channel sound system having the two players 2A and 2B has been described in each of the above embodiments, the same function can be realized with, for example, a four-channel sound system.
  • the present invention is not limited to DJ equipment, but can be applied to general mixers, electronic musical instruments, DAWs (Digital Audio Workstations), DTMs (Desk Top Music), and other audio equipment.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

L'invention concerne un dispositif acoustique (1) pourvu de curseurs de tempo (212A, 212B) destinés à modifier la vitesse de lecture d'une chanson pendant une lecture, le dispositif acoustique (1) comprenant des unités d'opération (21A, 21B) destinées à recevoir une opération d'utilisateur pour modifier une plage de modification de vitesse de lecture qui peut être modifiée par les curseurs de tempo et une unité de réglage (51) destinée à régler la plage de modification de vitesse de lecture par les curseurs de tempo en fonction de la vitesse de lecture au moment d'une opération d'utilisateur lorsque l'opération d'utilisateur est reçue par une unité d'opération.
PCT/JP2021/037741 2021-10-12 2021-10-12 Dispositif acoustique, procédé de commande de dispositif acoustique et programme WO2023062721A1 (fr)

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JP2023553796A JPWO2023062721A1 (fr) 2021-10-12 2021-10-12
PCT/JP2021/037741 WO2023062721A1 (fr) 2021-10-12 2021-10-12 Dispositif acoustique, procédé de commande de dispositif acoustique et programme

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Application Number Priority Date Filing Date Title
PCT/JP2021/037741 WO2023062721A1 (fr) 2021-10-12 2021-10-12 Dispositif acoustique, procédé de commande de dispositif acoustique et programme

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001243692A (ja) * 2000-02-25 2001-09-07 Teac Corp 記録媒体再生装置
JP2009531807A (ja) * 2006-03-28 2009-09-03 ヌマーク インダストリーズ，エルエルシー メディア・ストレージ・マネージャおよびプレーヤー
WO2012081054A1 (fr) * 2010-12-15 2012-06-21 パイオニア株式会社 Dispositif de boîte de mixage, système de lecteur, procédé de fonctionnement de dispositif de boîte de mixage et programme associé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001243692A (ja) * 2000-02-25 2001-09-07 Teac Corp 記録媒体再生装置
JP2009531807A (ja) * 2006-03-28 2009-09-03 ヌマーク インダストリーズ，エルエルシー メディア・ストレージ・マネージャおよびプレーヤー
WO2012081054A1 (fr) * 2010-12-15 2012-06-21 パイオニア株式会社 Dispositif de boîte de mixage, système de lecteur, procédé de fonctionnement de dispositif de boîte de mixage et programme associé

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