Performance system, control system and control method

Abstract

The performance system (100) comprises: a plurality of keys (K); a plurality of light-emitting parts (E) arranged along the plurality of keys (K); and a guidance control part which guides a key to be operated among the plurality of keys (K) by causing the light emission of at least one light-emitting part (E) among the plurality of light-emitting parts (E) to change over time.

Description

Technical Field

[0001] The present invention relates to a technology for guiding the performance of a musical instrument. Background Art

[0002] Various techniques for guiding a player to play a keyboard instrument have been proposed in the past. For example, Patent Document 1 discloses a performance training device that emits light from a plurality of LEDs (Light Emitting Diodes) disposed near different keys, corresponding to a key that the player should operate.

[0003] Patent Document 1: Japanese Patent No. 4496882 Summary of the invention

[0004] However, if the LEDs corresponding to the keys to be operated are simply illuminated, it is actually difficult for an unskilled performer to perform smoothly. In view of the above, an object of one embodiment of the present invention is to effectively guide the performer to operate a plurality of keys.

[0005] In order to solve the above problems, one embodiment of the present invention involves a performance system comprising: a plurality of keys; a plurality of light-emitting parts arranged along the plurality of keys; and a guidance control part, which guides the keys to be operated among the plurality of keys by changing the light emission of at least one of the plurality of light-emitting parts over time.

[0006] Another aspect of the present invention relates to a performance system comprising: a plurality of keys; and a performance guide unit that presents a guidance display to a user that changes over time in a direction from a first key among the plurality of keys toward a second key that should be operated after the first key.

[0007] One embodiment of the present invention involves a performance system that is a system for controlling a keyboard instrument, the keyboard instrument comprising: a plurality of keys; and a plurality of light-emitting portions arranged along the plurality of keys, the control system comprising: a music processing portion that determines a key to be operated among the plurality of keys; and a guidance control portion that guides a key to be operated among the plurality of keys by causing the light emission of at least one of the plurality of light-emitting portions to vary over time.

[0008] A control method involved in one embodiment of the present invention is a method for controlling a keyboard instrument, which has: a plurality of keys; and a plurality of light-emitting portions arranged along the plurality of keys. In the control method, a key to be operated among the plurality of keys is determined, and the key to be operated among the plurality of keys is guided by causing the light emission of more than one light-emitting portion among the plurality of light-emitting portions to change over time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a top view of the performance system according to the first embodiment.

[0010] Figure 2 It is a block diagram illustrating the structure of a control system.

[0011] Figure 3 It is a block diagram illustrating the functional configuration of a control system.

[0012] Figure 4 This is a diagram for explaining the migration guidance operation.

[0013] Figure 5 This is a diagram for explaining the migration guidance operation.

[0014] Figure 6 This is a flowchart of the performance guidance process.

[0015] Figure 7 It is an explanatory diagram of the operation of the guidance control unit according to the fourth embodiment.

[0016] Figure 8 This is a flowchart of the performance guidance process according to the fourth embodiment.

[0017] Fig. 9 This is an explanatory diagram related to the light emission of each light emitting unit in the fourth embodiment.

[0018] Fig.10 This is a block diagram illustrating the structure of the performance system according to the fifth embodiment.

[0019] Fig.11 It is a perspective view of the keyboard instrument of the 6th embodiment.

[0020] Fig.12 It is a cross-sectional view of the keyboard cover.

[0021] Fig.13 It is an explanatory diagram of the transition guidance operation of the modified example.

[0022] Fig.14 It is an explanatory diagram of the transition guidance operation of the modified example.

[0023] Fig.15 It is an explanatory diagram of the transition guidance operation of the modified example.

[0024] Fig.16 It is an explanatory diagram of the transition guidance operation of the modified example.

[0025] Fig.17 It is an explanatory diagram of the transition guidance operation of the modified example.

[0026] Fig.18 It is an explanatory diagram of the transition guidance operation of the modified example.

[0027] Fig.19 It is an explanatory diagram of the transition guidance operation of the modified example.

[0028] Fig. 20 It is a block diagram illustrating the configuration of a performance system according to a modified example.

[0029] Fig.21 It is a block diagram illustrating the configuration of a performance system according to a modified example. DETAILED DESCRIPTION

[0030] A: First embodiment

[0031] Figure 1 1 is a top view of a musical instrument system 100 according to the first embodiment. The musical instrument system 100 is an electronic musical instrument that emits musical sounds in accordance with the performance of a performer, and includes a keyboard instrument 10 and a control system 50. The keyboard instrument 10 is an electronic keyboard instrument including a housing 11, a keyboard unit 20, a playback system 30, and a guide device 40. The control system 50 is a computer system that controls the operation of the keyboard instrument 10. The housing 11 of the keyboard instrument 10 is a hollow structure that supports and accommodates the keyboard unit 20, the playback system 30, the guide device 40, and the control system 50.

[0032] The keyboard unit 20 has a keyboard 21 and a detection device 22. The keyboard 21 is composed of a plurality of keys K corresponding to different pitches. Each key K is a performance operating member that receives an operation by a performer (specifically, pressing and releasing a key). The plurality of keys K include a plurality of white keys and a plurality of black keys. The plurality of keys K are arranged along the X-axis. The X-axis is an axis extending in the left and right directions of the performer. In the following description, one direction along the X-axis is marked as the X1 direction, and the other direction along the X-axis is marked as the X2 direction. The X1 direction is equivalent to the right direction of the performer, and the X2 direction is equivalent to the left direction of the performer.

[0033] The detection device 22 is a sensor that detects the operation of each of the multiple keys K. Specifically, the detection device 22 detects the player's operation of playing each key K (i.e., pressing the key) and the release of the operation (i.e., releasing the key). The detection device 22 is composed of a sensor that detects the displacement of each key K in an optical, mechanical or magnetic manner, for example.

[0034] The playback system 30 plays the musical sound corresponding to the performance of the performer. Specifically, the playback system 30 has a sound source device 31 and a sound playback device 32. The sound source device 31 generates a sound signal corresponding to the performance of the performer. The sound signal is a signal indicating the musical sound corresponding to the key K operated by the performer. That is, the sound source device 31 generates a sound signal of a pitch corresponding to the key K operated by the performer among a plurality of pitches.

[0035] The sound emitting device 32 emits the musical sound represented by the acoustic signal. For example, a single speaker or a plurality of speakers are used as the sound emitting device 32. In addition, headphones mounted on the head of the performer can also be used as the sound emitting device 32. In addition, the playback system 30 or the sound emitting device 32 configured separately from the keyboard instrument 10 can be connected to the keyboard instrument 10 in a wired or wireless manner.

[0036] The guidance device 40 is an output device that guides the player to operate the keys K among the keys K in sequence. The guidance device 40 includes a plurality of light emitting parts E corresponding to different keys K of the keyboard 21 and a driving circuit 41 that drives each light emitting part E. Each of the plurality of light emitting parts E is composed of one or more light emitting elements such as LEDs. In addition, the shape of the light emitting part E is arbitrary. The light emission / extinguishing and the light emission color of each light emitting part E are variably controlled for each light emitting part E.

[0037] The control system 50 controls each element of the keyboard instrument 10 . Figure 2 2 is a block diagram illustrating a configuration of a control system 50. The control system 50 is implemented by a computer system including a control device 51, a storage device 52, and an operating device 53.

[0038] The control device 51 is composed of a single or multiple processors that control various elements of the keyboard instrument 10. Specifically, the control device 51 is composed of one or more processors such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an SPU (Sound Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or an ASIC (Application Specific Integrated Circuit).

[0039] The storage device 52 is a single memory or multiple memories that store programs executed by the control device 51 and data used by the control device 51. The storage device 52 is composed of a known recording medium such as a magnetic recording medium or a semiconductor recording medium. In addition, the storage device 52 can be composed of a combination of multiple recording media. In addition, a removable recording medium that can be attached to and detached from the control system 50, or an external recording medium (such as an online storage) with which the keyboard instrument 10 can communicate can be used as the storage device 52.

[0040] The storage device 52 stores music data M. The music data M is data that specifies the time series (i.e., music score) of multiple notes constituting the music. Specifically, the music data M specifies the pitch and the sounding period for each of the multiple notes of the music. The pitch is specified by a number representing a scale tone. The pitch is also expressed as information that specifies a key K of the keyboard 21. The sounding period is specified by the start and end times of the notes.

[0041] As understood from the above description, the music data M is data that specifies the keys K that the performer should operate in time series. For example, a file in a format that complies with the MIDI (Musical Instrument Digital Interface) standard is used as the music data M. The starting point of the sounding period of a note is specified by a note-on event, and the end point of the sounding period is specified by a note-off event.

[0042] The operating device 53 is an input device for receiving instructions from the performer. Figure 1 As illustrated, a plurality of operating elements operated by a user are exemplified as the operating device 53. Alternatively, a touch panel that detects a touch of a performer may be employed as the operating device 53.

[0043] In addition, the functions of the sound source device 31 may be realized by the control device 51 executing a program stored in the storage device 52. That is, the element (sound source unit) that generates the sound signal may be any of a software sound source realized by the general control device 51 and a hardware sound source realized by a dedicated circuit (sound source device 31).

[0044] Figure 3 2 is a block diagram illustrating a functional configuration of the control system 50. The control device 51 executes a program stored in the storage device 52 to realize a plurality of functions (music processing unit 511, guidance control unit 512) for guiding the operation of each key of the keyboard 21 to the performer.

[0045] The music processing unit 511 analyzes the music data M and sequentially determines the keys K that the performer should operate. The music processing unit 511 determines each key K in parallel with the performer's performance. In addition, in a mode in which a plurality of music data M corresponding to different music pieces are stored in the storage device 52, the music processing unit 511 processes one music data M selected by the performer through the operation of the operating device 53.

[0046] The guidance control unit 512 controls the guidance device 40 in accordance with the music data M. Specifically, the guidance control unit 512 guides the performer to the key K that should be operated for the performance of the music by causing each of the plurality of light emitting units E of the guidance device 40 to emit light in sequence in accordance with the music data M. In addition, the action of the guidance control unit 512 causing each of the light emitting units E to emit light also represents an action of assisting the performer in the performance of the music or an action of training the performer in the performance of the music.

[0047] Figure 4 2 is an explanatory diagram of the operation of the guidance control unit 512. Figure 4 In FIG. 1 , the time transition of the light-emitting state of each light-emitting portion E is illustrated with the lower side of the figure as the direction of the time axis. Figure 4 In FIG. 1 , nine light emitting units E ( E1 to E9 ) of the guiding device 40 are illustrated for convenience.

[0048] The guidance control unit 512 causes the light-emitting unit E corresponding to the key K that the performer should play next among the multiple light-emitting units E of the guidance device 40 to emit light through the first color. That is, the light emission of the light-emitting unit E based on the first color is a display that guides the operation of the key K corresponding to the light-emitting unit E in advance. In the case where the key K guided by the light emission of the first color is actually operated by the performer, the guidance control unit 512 changes the light emission color of the key K from the first color to the second color. The first color and the second color are different light emission colors. In addition, when the operation of the key K is released (the key is released), the guidance control unit 512 turns off the light-emitting unit E corresponding to the key K. In addition, the guidance control unit 512 can also turn off the light-emitting unit E corresponding to the key K when the performer operates the key K.

[0049] Assume that the performer operates the first key K1 and the second key K2 in sequence. The second key K2 is the key K that should be played immediately after the first key K1. That is, the pitch corresponding to the first key K1 and the pitch corresponding to the second key K2 are specified in sequence by the music data M. The pitch of the second key K2 is higher than the pitch of the first key K1. Therefore, the second key K2 is located in the X1 direction (right direction) compared to the first key K1.

[0050] exist Figure 4In the example, it is assumed that the performer operates the first key K1 between time t1 and time t2. Therefore, the luminous color of the light-emitting part E corresponding to the first key K1 among the multiple light-emitting parts E (hereinafter referred to as "the first light-emitting part Ea1") changes from the first color to the second color at time t2. In addition, as a result of the first key K1 being actually operated, the key K that the performer should play next is updated from the first key K1 to the second key K2. Therefore, the light-emitting part E corresponding to the second key K2 among the multiple light-emitting parts E (hereinafter referred to as "the second light-emitting part Ea2") starts to emit light based on the first color at time t2. In addition, at time t6 when the operation of the first key K1 is released, the first light-emitting part Ea1 is extinguished.

[0051] exist Figure 4 In the example, it is assumed that the performer operates the second key K2 between time t6 and time t7. Therefore, the luminous color of the second light-emitting part Ea2 corresponding to the second key K2 changes from the first color to the second color at time t7. The above actions are repeated over the entire range of the music. Therefore, the performer can play the music according to the guidance of the guidance device 40 while confirming the lighting / extinguishing and luminous color of each light-emitting part E at any time.

[0052] In parallel with the above action of sequentially guiding the keys K that the performer should operate by the light emission of the light emitting unit E, the guidance control unit 512 performs an action of guiding the transition of the keys K that the performer should operate (hereinafter referred to as "transition guidance action"). The transition guidance action is an action of notifying the performer of the transition from the first key K1 to the second key K2.

[0053] The transition guidance action is an action of causing two or more transition light emitting parts Eb (Lb1 to Lb5) to emit light in sequence in the direction from the first key K1 to the second key K2. The plurality of transition light emitting parts Eb are light emitting parts E located between the first light emitting part Ea1 and the second light emitting part Ea2. The number of transition light emitting parts Eb is a variable value corresponding to the pitch difference between the first key K1 and the second key K2. In the transition guidance action, the guidance control unit 512 causes the plurality of transition light emitting parts Eb to emit light in sequence in the third color. The third color is a light emitting color different from the first color and the second color.

[0054] exist Figure 4In the example of , the second key K2 is located in the X1 direction compared to the first key K1. Therefore, the guidance control unit 512 causes the five transition light-emitting parts Eb1 to Lb5 to emit light in sequence in the order of arrangement along the X1 direction. That is, at time t2 when the transition guidance action starts, the transition light-emitting part Eb1 at the left end among the five transition light-emitting parts Eb1 to Lb5 emits light, at time t3, the transition light-emitting part Eb2 emits light, at time t4, the transition light-emitting part Eb3 emits light, at time t5, the transition light-emitting part Eb4 emits light, and at time t6, the transition light-emitting part Eb5 at the right end among the five emits light. That is, the state of emitting light in the third color transitions with time in each of the plurality of transition light-emitting parts Eb. As understood from the above description, the direction (X1 direction) of the light emission transition of the transition light-emitting part Eb is the direction in which the player who is operating the first key K1 should move his finger in order to operate the next second key K2.

[0055] like Figure 4 As shown in the example, the transition light emitting part Eb1 closest to the left end of the first light emitting part Ea1 among the plurality of transition light emitting parts Eb emits light in parallel with the first light emitting part Ea1. That is, the guidance control part 512 causes the first light emitting part Ea1 to emit light during a period that includes at least the time point (time t3) when the transition light emitting part Eb1 emits light. Similarly, the transition light emitting part Eb5 closest to the right end of the second light emitting part Ea2 among the plurality of transition light emitting parts Eb emits light in parallel with the second light emitting part Ea2. That is, the guidance control part 512 causes the second light emitting part Ea2 to emit light during a period that includes at least the time point (time t6) when the transition light emitting part Eb5 emits light. Therefore, in addition to being able to grasp the direction in which the finger should be moved by visually confirming that the plurality of transition light emitting parts Eb are illuminated in sequence, the performer can also grasp the first key K1 and the second key K2 that should be operated before and after by visually confirming the illumination of the first light emitting part Ea1 and the second light emitting part Ea2.

[0056] like Figure 4 As shown by the arrow A, the migration guidance action is repeated until the second key K2 is operated. That is, the guidance control unit 512 ends the migration guidance action when the second key K2 is operated. Therefore, the performer can reliably and easily grasp the direction and distance in which his finger should be moved in order to operate the second key K2.

[0057] exist Figure 5 The example shows a case where the pitch of the second key K2 is lower than the pitch of the first key K1. That is, the second key K2 is located in the X2 direction (left direction) compared to the first key K1. Figure 5Under the condition of, the guidance control unit 512 makes the five transition light emitting units Eb1 to Lb5 emit light in sequence according to the arrangement order along the X2 direction. As described above, in the first embodiment, the light emission of the plurality of transition light emitting units Eb changes with time in the direction from the first key K1 toward the second key K2.

[0058] Figure 6 1 is a flowchart of the process (hereinafter referred to as "performance guidance process") in which the control device 51 controls each light emitting unit E. The performance guidance process is initiated by an instruction from the performer to the operating device 53. The performance guidance process is executed in parallel with the generation of the sound signal. Figure 4 The guidance control unit 512.

[0059] The control device 51 performs a transition guidance operation (Sa1). That is, the control device 51 causes the plurality of transition light emitting parts Eb to emit light in sequence in a direction from the first key K1 that should have been operated immediately before toward the second key K2 that should be operated next.

[0060] The control device 51 determines whether the second key K2 has been operated (Sa2). If the second key K2 has not been operated (Sa2: NO), the control device 51 advances the process to step Sa1. That is, the transition guidance operation is repeated until the second key K2 is operated (Sa1).

[0061] On the other hand, when the second key K2 has been operated (Sa2: YES), the control device 51 updates the light-emitting state of each light-emitting part E (Sa3). Specifically, the control device 51 turns off the first light-emitting part Ea1 corresponding to the first key K1 at the current time point. The control device 51 updates the second key K2 operated by the performer to the new first key K1, and changes the first light-emitting part Ea1 corresponding to the updated first key K1 from the first color to the second color. In addition, the control device 51 determines the new second key K2 by referring to the music data M, and makes the second light-emitting part Ea2 corresponding to the second key K2 emit light in the first color.

[0062] When the lighting state is updated through the above process, the control device 51 advances the process to step Sa1 to execute a transition guidance operation (Sa1). In the transition guidance operation, the plurality of transition light emitting units Eb sequentially emit light in the direction from the updated first key K1 toward the updated second key K2.

[0063] As described above, in the first embodiment, the light emission of each of the plurality of light emitting parts E is changed over time, thereby guiding the performer to operate the second key K2. Therefore, compared with a structure that only controls the light emission / extinguishing of the light emitting part E corresponding to the key K that the performer should operate, the performer can be effectively guided to operate the plurality of keys.

[0064] In the first embodiment, the light emission of the plurality of transition light emitting parts Eb changes with time, particularly in the direction from the first key K1 toward the second key K2. The performer can visually and intuitively grasp the direction in which his finger should be moved in order to operate the second key K2. Therefore, compared with, for example, a method in which only one light emitting part E corresponding to the key K to be operated among the plurality of light emitting parts E emits light, the performer can be effectively guided in playing the keyboard instrument 10.

[0065] In the first embodiment, the light emission of the plurality of transition light emitting portions Eb between the first light emitting portion Ea1 corresponding to the first key K1 and the second light emitting portion Ea2 corresponding to the second key K2 to be operated after the first key K1 varies with time. Therefore, compared with a method of controlling the light emission of the plurality of transition light emitting portions Eb selected independently of the first light emitting portion Ea1 and the second light emitting portion Ea2, it is easier for the performer to visually and intuitively grasp the direction and distance to which his or her finger should be moved in order to operate the second key K2.

[0066] B: Second embodiment

[0067] In the following exemplary embodiments, the same reference numerals as those in the first embodiment are used for elements having the same functions as those in the first embodiment, and detailed descriptions thereof are appropriately omitted.

[0068] The control device 51 of the second embodiment functions as a music processing unit 511 and a guidance control unit 512, similarly to the first embodiment. The music processing unit 511 of the second embodiment sets the performance speed T (tempo) of the music. For example, the music processing unit 511 sets the performance speed T in accordance with the instruction from the performer to the operating device 53. In addition, the method of setting the performance speed T is arbitrary. For example, the music processing unit 511 can set the performance speed T to a value specified by the music data M.

[0069] In the transition guidance operation, the guidance control unit 512 of the second embodiment controls the speed (hereinafter referred to as “transition speed”) Va at which the light emission of the plurality of transition light emitting units Eb changes with time according to the performance speed T of the music.

[0070] The migration speed Va is, for example, the speed at which the light is emitted in the third color and sequentially travels to each of the plurality of transition light-emitting portions Eb. The migration speed Va is also expressed as an index of the frequency of light emission migration of each transition light-emitting portion Eb per unit time. For example, the higher the migration speed Va, the shorter the period from when each transition light-emitting portion Eb turns off until when the next transition light-emitting portion Eb turns on, or the period during which each transition light-emitting portion Eb turns on.

[0071] Specifically, the higher the performance speed T is, the higher the guidance control unit 512 sets the transition speed Va. For example, it is assumed that the performance speed T can be set to a numerical value T1 and a numerical value T2. The numerical value T1 is greater than the numerical value T2 (T1>T2). The transition speed Va1 when the performance speed T is set to the numerical value T1 is greater than the transition speed Va2 when the performance speed T is set to the numerical value T2 (Va1>Va2).

[0072] The change of the transition speed Va with respect to the performance speed T may be a linear change or a curved change. In addition, the range in which the transition speed Va does not change with respect to the change of the performance speed T may be included in the numerical range of the performance speed T.

[0073] The operations other than the control of the transition speed Va are the same as those of the first embodiment. Therefore, in the second embodiment, the same effects as those of the first embodiment are achieved. In addition, in the second embodiment, the performer can roughly grasp the performance speed T of the music by visually grasping the speed (transition speed Va) of the light emission changes of the plurality of transition light-emitting parts Eb.

[0074] C: Third embodiment

[0075] The control device 51 of the third embodiment functions as a music processing unit 511 and a guidance control unit 512 in the same manner as in the first embodiment. The music processing unit 511 of the third embodiment determines the duration L of each note. The duration L is the length of time that one note lasts. Specifically, the music processing unit 511 calculates the duration L based on the start time and the end time of the sounding period specified by the music data M for each note.

[0076] The guidance control unit 512 of the third embodiment controls the transition speed Va that changes the light emission of the plurality of transition light emitting units Eb with time in the transition guidance operation according to the duration L of the note corresponding to the first key K1 in the music. That is, the transition speed Va from the first key K1 to the second key K2 changes according to the duration L of the note corresponding to the first key K1 being operated by the performer.

[0077] Specifically, the shorter the sustain length L is, the higher the transition speed Va is set by the guidance control unit 512. For example, it is assumed that the sustain length L can be set to a numerical value L1 and a numerical value L2. The numerical value L1 is smaller than the numerical value L2 (L1<L2). The transition speed Va1 when the sustain length L of the note corresponding to the first key K1 is the numerical value L1 is greater than the transition speed Va2 when the sustain length L is the numerical value L2 (Va1>Va2).

[0078] The change in migration velocity Va with respect to the persistence length L may be a linear change or a curved change. In addition, the range in which the migration velocity Va does not change with respect to the change in the persistence length L may be included in the numerical range of the persistence length L.

[0079] The operations other than the control of the transition speed Va are the same as those of the first embodiment. Therefore, in the third embodiment, the same effects as those of the first embodiment are achieved. In addition, in the third embodiment, the performer can grasp the length of time (continuation length L) that the operation of the first key K1 should be continued by visually confirming the speed of the light emission change of the plurality of transition light-emitting parts Eb (transition speed Va).

[0080] D: Fourth embodiment

[0081] In the first to third embodiments, a method of causing a plurality of transition light-emitting portions Eb to emit light in sequence in the direction from the first key K1 toward the second key K2 is exemplified. In the fourth embodiment, the light-emitting characteristics of a light-emitting portion E (hereinafter referred to as the "target light-emitting portion E") corresponding to the key K that the performer should operate next (hereinafter referred to as the "target key K") are changed over time. The light-emitting characteristics are the light-emitting color or the light-emitting intensity. The target light-emitting portion E of the fourth embodiment is equivalent to the second light-emitting portion Ea2 of the first to third embodiments.

[0082] The structure of the performance system 100 is the same as that of the first embodiment. In the fourth embodiment, the control of the plurality of transitional light emitting units Eb illustrated in the first to third embodiments is omitted. However, the control of the transitional light emitting units Eb in the first to third embodiments can also be applied to the fourth embodiment.

[0083] Figure 7 It is an explanatory diagram of the operation of the guidance control unit 512 according to the fourth embodiment. Figure 7 The target time point tc on the time axis of is the time point at which the player should operate the target key K. Specifically, the target time point tc is the starting point of the sounding period (note-on) specified by the music data M for the note corresponding to the target key K.

[0084] The guide control unit 512 causes the light emission characteristics of the target light emitting unit E to change over time during the control period C. Specifically, the guide control unit 512 causes the target light emitting unit E to emit light at the starting point ta of the control period C, and turns off the target light emitting unit E at the end point tb of the control period C. The control period C is a period corresponding to the target time point tc. Specifically, the control period C is a period including the target time point tc. The control period C is divided into a first period Q1 and a second period Q2 using the target time point tc as a boundary.

[0085] The first period Q1 is the period before the target time point tc. Specifically, the first period Q1 is the period from the time point ta which is a predetermined time (e.g., 1 second) earlier than the target time point tc to the target time point tc. On the other hand, the second period Q2 is the period after the target time point tc. Specifically, the second period Q2 is the period from the target time point tc to the time point tb which is a predetermined time later.

[0086] The guide control unit 512 changes the luminous color of the target luminous unit E over time during the first period Q1. Specifically, during the first period Q1, the guide control unit 512 changes the luminous color of the target luminous unit E continuously from the first color to the second color. The luminous color during the process from the first color to the second color is arbitrary.

[0087] In addition, in the second period Q2, the control unit 512 guides the target light emitting unit E to emit light in the third color. The third color is an arbitrary light emitting color. It is arbitrary whether the third color is the same as the first color or the second color. In the second period Q2, the light emission intensity of the target light emitting unit E is constant. For example, the light emission intensity of the target light emitting unit E in the second period Q2 is less than the light emission intensity of the target light emitting unit E in the first period Q1.

[0088] In addition, Figure 7 , the change of the light emission characteristics of the target light emitting unit E when the player does not operate the target key K is conveniently shown. When the player operates the target key K at any time point in the control period C, the guidance control unit 512 turns off the target light emitting unit E at that time point. That is, at the time point when the target key K is operated in the first period Q1 or the second period Q2, the target light emitting unit E is turned off regardless of the light emission characteristics of the target light emitting unit E at that time point.

[0089] Figure 8 This is a flowchart of the performance guidance process of the fourth embodiment. The performance guidance process is executed sequentially or in parallel for each of the plurality of keys K. As in the first embodiment, the guidance control unit 512 is realized by the control device 51 executing the performance guidance process.

[0090] The control device 51 waits for a specific key K (target key K) among the multiple keys K until the time point ta of the start of the control period C arrives (Sb1: NO). When the time point ta arrives (Sb1: YES), the control device 51 changes the light emission characteristics of the target light emitting unit E with time (Sb2) until the target time point tc arrives (Sb3: NO). Specifically, the light emission color of the target light emitting unit E changes with time from the first color to the second color.

[0091] If the target time point tc arrives (Sb3: YES), the control device 51 causes the target light emitting unit E to emit light in the third color (Sb4). The control device 51 maintains the light emission of the third color by the target light emitting unit E until the time point tb of the end point of the second period Q2 arrives (Sb5: NO). If the time point tb arrives (Sb5: YES), the control device 51 turns off the target light emitting unit E (Sb6).

[0092] As described above, in the fourth embodiment, the light emission of each of the plurality of light emitting parts E is changed over time to guide the player to the target key K to be operated. Therefore, compared with a structure in which only the light emission / extinguishing of the light emitting part E corresponding to the key K to be operated by the player is controlled, the player can be effectively guided to operate the plurality of keys.

[0093] In the fourth embodiment, in particular, the light color of the target light emitting portion E corresponding to the target key K that the performer should operate among the plurality of light emitting portions E changes with time. Therefore, compared with a structure in which the light emission / extinguishing of the light emitting portion E corresponding to the key K that the performer should operate is controlled only in a binary manner, the performer can be effectively guided to operate the plurality of keys K.

[0094] Fig. 9 This is an explanatory diagram of a case where two operations are performed on one key K at short intervals. Fig. 9 Case 1 is a case where the control period C1 corresponding to the target key K starts from the time point ta1. Fig. 9 Case 2 is a case where the control period C1 corresponding to the target key K starts from the time point ta2. The time point ta2 is a time point after the time point ta1.

[0095] Fig. 9Case 3 is a case where two notes (the first note and the second note) corresponding to the target key K are played one after the other with a short interval. Specifically, in case 3, the control period C1 of the first note corresponding to the target key K starts at time point ta1, and the control period C2 of the second note corresponding to the target key K starts at time point ta2. Specifically, it is assumed that the time point ta2 at which the control period C2 corresponding to the second note starts is a time point in the middle of the control period C1 corresponding to the first note. That is, the control period C1 and the control period C2 partially overlap.

[0096] like Fig. 9 As illustrated, it is assumed that the performer operates the target key K at time point tx in order to play the first note. Time point tx is a time point in the period during which the control period C1 and the control period C2 overlap each other. Under the above state, the light-emitting characteristics of the target light-emitting portion E change from the light-emitting state of situation 1 to the light-emitting state of situation 2 at time point tx (hereinafter referred to as the "comparative example"), and the light emission of the target light-emitting portion E continues uninterruptedly before and after the time point tx. That is, the performer cannot visually confirm the extinction of the target light-emitting portion E caused by the operation of the target key K. Therefore, the performer may not be able to clearly recognize the light emission of the target light-emitting portion E corresponding to the second note.

[0097] In consideration of the above, the guidance control unit 512 of the fourth embodiment turns off the target light emitting unit E at the time point tx of the player's operation, and keeps the target light emitting unit E turned off until the time point ty after a predetermined length of time (hereinafter referred to as "turn-off period") δ. The turn-off period δ is, for example, a period of about 100 milliseconds.

[0098] Then, at the end point ty of the extinguishing period δ, the control unit 512 is guided to start the target light emitting unit E corresponding to the control period C2. Specifically, the control unit 512 guides the target light emitting unit E to perform the light emitting operation after the time point ty at the time point ty on the time axis, assuming that the control of the light emission characteristics of the target light emitting unit E is started from the starting point ta2 of the control period C2 (case 2). That is, the target light emitting unit E starts to emit light from the time point ty.

[0099] As understood from the above description, when the performer operates the target key K at time point tx during the period in which the control period C1 of the first note and the control period C2 of the second note overlap each other, the guidance control unit 512 turns off the target light emitting unit E during the extinguishing period δ from time point tx to time point ty. Furthermore, the guidance control unit 512 sets the light emitting state at time point ty, assuming that the light emitting characteristics of the target light emitting unit E change with time from the starting point ta1 of the control period C2, as the initial state, and makes the target light emitting unit E emit light from time point ty.

[0100] According to the above aspect, the target light emitting part E is turned off during the turn-off period δ. Therefore, there is an advantage that the player can clearly distinguish between the light emission of the target light emitting part E corresponding to the first note and the light emission of the target light emitting part E corresponding to the second note.

[0101] In addition, similarly to the second embodiment or the third embodiment, the speed (hereinafter referred to as "change speed") Vb at which the light emission characteristics of the target light emitting unit E change over time can be controlled in accordance with the performance speed T of the music or the duration L of the note. For example, the change speed Vb in the first period Q1 of the control period C is controlled in accordance with the performance speed T or the duration L.

[0102] Specifically, the higher the performance speed T is, the higher the speed the guidance control unit 512 sets the change speed Vb. For example, it is assumed that the performance speed T can be set to a value T1 and a value T2 (T1>T2). The change speed Vb1 when the performance speed T is set to the value T1 is greater than the change speed Vb2 when the performance speed T is set to the value T2 (Vb1>Vb2).

[0103] The change in the change speed Vb with respect to the performance speed T may be a linear change or a curved change. In addition, the range in which the change speed Vb does not change with respect to the change in the performance speed T may be included in the numerical range of the performance speed T.

[0104] In addition, the shorter the sustain length L of the note that the player has just played, the higher the speed the guidance control unit 512 sets the change speed Vb. For example, suppose that the sustain length L can be set to a value L1 and a value L2 (L1 < L2). The change speed Vb1 when the sustain length L of the previous note is the value L1 is greater than the change speed Vb2 when the sustain length L is the value L2 (Va1 > Va2).

[0105] The change in the change speed Vb with respect to the persistence length L may be a linear change or a curved change. In addition, the range in which the change speed Vb does not change with respect to the change in the persistence length L may be included in the numerical range of the persistence length L.

[0106] In the first to third embodiments, a method of changing the light emission characteristics of the plurality of transition light emitting parts Eb with time in the direction from the first key K1 toward the second key K2 is exemplified. In the fourth embodiment, a method of changing the light emission characteristics of the target light emitting part E corresponding to the target key K with time is exemplified. The guidance control part 512 of the first to fourth embodiments generally expresses an element of guiding the key K that the performer should operate by changing the light emission of one or more of the plurality of light emitting parts E with time.

[0107] E: Fifth embodiment

[0108] Fig.10 1 is a block diagram illustrating the structure of the performance system 100 of the fifth embodiment. In the first embodiment, the control system 50 is mounted on the housing 11 of the keyboard instrument 10. In the performance system 100 of the fifth embodiment, the control system 50 is implemented as a device separate from the keyboard instrument 10. For example, a general-purpose information processing device such as a smart phone, a tablet terminal, or a personal computer may be used as the control system 50.

[0109] Specifically, the control system 50 has the same elements (control device 51, storage device 52, operation device 53) as those of the first embodiment, and further has a communication device 54. On the other hand, the keyboard instrument 10 has the same elements as those of the first embodiment, and further has a communication device 60. The communication device 54 and the communication device 60 can communicate with each other by wire or wirelessly.

[0110] The control device 51 of the control system 50 communicates with the keyboard instrument 10 via the communication device 54, thereby controlling the operation of the keyboard instrument 10. The operation (e.g., performance guidance processing) performed by the control system 50 and the operation of the keyboard instrument 10 performed in accordance with the control of the control system 50 are the same as those in the first embodiment.

[0111] In the fifth embodiment, the same effects as those of the first embodiment are achieved. In the above description, the fifth embodiment is described based on the first embodiment, but the structure of the fifth embodiment can also be applied to the second to fourth embodiments. In addition, the playback system 30 (the sound source device 31 and the sound playback device 32) can be mounted on the control system 50 that is separate from the keyboard instrument 10.

[0112] F: Sixth embodiment

[0113] Fig.11 1 is a perspective view of a keyboard instrument 10 according to a sixth embodiment. The keyboard instrument 10 according to the sixth embodiment has a keyboard cover 12 in addition to the same elements as those of the first embodiment. The keyboard cover 12 is a plate-like member provided on the frame 11 in an openable and closable state. The keyboard cover 12 rotates from one of a closed state and an open state to the other. The closed state is a state in which the keyboard 21 is covered by the keyboard cover 12. The open state is a state in which the keyboard 21 is exposed. The performer moves the keyboard cover 12 from the closed state to the open state to perform on the keyboard instrument 10, and when the performance is finished, the performer moves the keyboard cover 12 from the open state to the closed state.

[0114] Fig.12It is a partial cross-sectional view of the keyboard cover 12 in a cross section perpendicular to the X-axis. The guide device 40 of the sixth embodiment is provided on the keyboard cover 12. Specifically, the guide device 40 is provided on the inner surface 13 of the keyboard cover 12. The inner surface 13 of the keyboard cover 12 is a surface facing the keyboard 21 in the closed state. An installation groove 14 is formed along the inner surface 13 of the keyboard cover 12 close to the lower side of the frame 11. The installation groove 14 is a recessed portion extending in a straight line in the direction of the X-axis. The guide device 40 is accommodated in the installation groove 14.

[0115] The guide device 40 of the sixth embodiment is a structure in which a plurality of light emitting units E are arranged on the surface of a strip-shaped mounting substrate 42. Fig.12 The guide device 40 is also provided on the mounting substrate 42. In a state where the mounting substrate 42 is in contact with the bottom surface of the mounting groove 14, the guide device 40 is provided on the keyboard cover 12. Therefore, the plurality of light emitting portions E are arranged in the direction of the X-axis along the lower side of the keyboard cover 12 near the keyboard 21.

[0116] As per Fig.12 As can be understood, the thickness H of the guide device 40 is less than the depth D of the mounting groove 14 (H<D). Therefore, each light emitting portion E does not protrude from the inner surface 13 of the keyboard cover 12. That is, the guide device 40 is accommodated within the step difference between the inner surface 13 of the keyboard cover 12 and the bottom surface of the mounting groove 14. In addition, the thickness H of the guide device 40 is the total value of the thickness of the mounting substrate 42 and the thickness of the light emitting portion E.

[0117] The operation of the keyboard instrument 10 of the sixth embodiment is the same as that of the first embodiment. Therefore, in the sixth embodiment, the same effect as that of the first embodiment is achieved. In addition, in the sixth embodiment, a plurality of light emitting parts E are provided on the inner surface 13 of the keyboard cover 12. That is, in the closed state, the plurality of light emitting parts E are concealed in a state opposite to the keyboard 21. Therefore, compared with a method in which the plurality of light emitting parts E are always exposed on the exterior of the frame 11, there is an advantage in that the keyboard instrument 10 can maintain its aesthetic appearance in a non-used state (i.e., closed state).

[0118] In the above description, the sixth embodiment is described based on the first embodiment, but the structure of the sixth embodiment can also be applied to the second to fifth embodiments in the same manner.

[0119] G: Deformation

[0120] Specific modified forms added to the above-exemplified forms are exemplified below. A plurality of forms arbitrarily selected from the above-described embodiments and the following exemplified modified examples can be appropriately combined within a range that does not contradict each other.

[0121] (1) In the first to third embodiments, the plurality of light-emitting portions E between the first light-emitting portion Ea1 corresponding to the first key K1 and the second light-emitting portion Ea2 corresponding to the second key K2 are determined as transition light-emitting portions Eb as the object of the transition guidance action, but the positions of the plurality of transition light-emitting portions Eb are not limited to the above examples. The following methods are conceived as other examples of the transition guidance action. In addition, in the following examples, it is assumed that the second key K2 is located in the X1 direction of the first key K1. In the case where the second key K2 is located in the X2 direction of the first key K1, the light-emitting method of each light-emitting portion E becomes a method in which the left-right inversion of the following example is performed.

[0122] [Method 1]

[0123] The first light emitting portion Ea1 and the second light emitting portion Ea2 may be included in a plurality of transition light emitting portions Eb. Fig.13 As shown in the example, the first light emitting unit Ea1 may constitute one end of the arrangement of the plurality of transition light emitting units Eb, and the second light emitting unit Ea2 may constitute the other end of the arrangement. The transition guiding action of the above-mentioned configuration is an action to make the plurality of transition light emitting units Eb from the first light emitting unit Ea1 to the second light emitting unit Ea2 emit light in the third color in sequence.

[0124] [Method 2]

[0125] The light emitting unit E at a point midway between the first light emitting unit Ea1 and the second light emitting unit Ea2 may be set as an end point of a plurality of transition light emitting units Eb to be the subject of the transition guidance operation. Fig.14 and Fig.15 The figure shows nine light emitting units E from the light emitting unit E1 to the light emitting unit E9. The light emitting unit E1 is a first light emitting unit Ea1 corresponding to the first key K1, and the light emitting unit E9 is a second light emitting unit Ea2 corresponding to the second key K2.

[0126] like Fig.14 As shown in the example, the four light-emitting units E from light-emitting unit E2 to light-emitting unit E5 can be used as transition light-emitting units Eb to perform the transition guidance action. That is, each transition light-emitting unit Eb from light-emitting unit E2 to light-emitting unit E5 emits light in the third color in sequence. The three light-emitting units E from light-emitting unit E6 to light-emitting unit E8 do not emit light. That is, Fig.14 The method is to set the light emitting portion E5 at a point midway between the first light emitting portion Ea1 and the second light emitting portion Ea2 to be the end portion close to the second light emitting portion Ea2 in the arrangement of the plurality of transition light emitting portions Eb.

[0127] In addition, if Fig.15As shown in the example, the four light-emitting units E from light-emitting unit E5 to light-emitting unit E8 can be used as transition light-emitting units Eb to perform the transition guidance action. That is, each transition light-emitting unit Eb from light-emitting unit E5 to light-emitting unit E8 emits light in the third color in sequence. The three light-emitting units E from light-emitting unit E2 to light-emitting unit E4 do not emit light. That is, Fig.15 The method is a method in which the light emitting portion E5 at a point midway between the first light emitting portion Ea1 and the second light emitting portion Ea2 is an end portion close to the first light emitting portion Ea1 in the arrangement of the plurality of transition light emitting portions Eb.

[0128] [Method 3]

[0129] The light emitting section E located outside the range from the first light emitting section Ea1 to the second light emitting section Ea2 may be included in the plurality of transition light emitting sections Eb. Fig.16 and Fig.17 The figure shows nine light emitting units E from the light emitting unit E1 to the light emitting unit E9. The light emitting unit E3 is a first light emitting unit Ea1 corresponding to the first key K1, and the light emitting unit E7 is a second light emitting unit Ea2 corresponding to the second key K2.

[0130] like Fig.16 As shown in the example, the six light-emitting units E from the light-emitting unit E4 to the light-emitting unit E9 adjacent to the first light-emitting unit Ea1 can be used as the transition light-emitting units Eb to perform the transition guidance action. Each transition light-emitting unit Eb from the light-emitting unit E4 to the light-emitting unit E9 emits light in the third color in sequence. The light-emitting unit E9 is located in the X1 direction compared to the second light-emitting unit Ea2. That is, Fig.16 The method is based on the method in which the light emitted by the third color passes through the second light-emitting unit Ea2.

[0131] In addition, if Fig.17 As shown in the example, the six light-emitting units E from light-emitting unit E1 to light-emitting unit E6 can be used as transition light-emitting units Eb to perform the transition guidance action. Each transition light-emitting unit Eb from light-emitting unit E1 to light-emitting unit E6 emits light in the third color in sequence. Light-emitting unit E1 is located in the X2 direction compared to the first light-emitting unit Ea1. That is, Fig.17 The method is based on the method in which the light emitted by the third color passes through the first light-emitting unit Ea1.

[0132] [Method 4]

[0133] In the above examples, the method of determining the plurality of transition light emitting parts Eb in accordance with the first light emitting part Ea1 and the second light emitting part Ea2 is illustrated, but the relationship between the first light emitting part Ea1 and the second light emitting part Ea2 and the plurality of transition light emitting parts Eb is arbitrary. That is, the plurality of transition light emitting parts Eb may be determined regardless of the positions of the first key K1 and the second key K2.

[0134] For example, a predetermined number of light-emitting units E including the end in the X2 direction in the arrangement of the plurality of light-emitting units E may be used as a plurality of transition light-emitting units Eb to perform a transition guidance action. That is, the plurality of transition light-emitting units Eb corresponding to the end in the X2 direction in the keyboard 21 each emit light in the third color in sequence. In addition, a predetermined number of light-emitting units E including the end in the X1 direction in the arrangement of the plurality of light-emitting units E may be used as a plurality of transition light-emitting units Eb to perform a transition guidance action. That is, the plurality of transition light-emitting units Eb corresponding to the end in the X1 direction in the keyboard 21 each emit light in the third color in sequence.

[0135] [Method 5]

[0136] It is not necessary to utilize all the mutually adjacent light emitting sections E between the first light emitting section Ea1 and the second light emitting section Ea2 as the target of the transition guiding operation, namely, the transition light emitting section Eb. Fig.18 The figure shows nine light emitting units E from the light emitting unit E1 to the light emitting unit E9. The light emitting unit E1 is a first light emitting unit Ea1 corresponding to the first key K1, and the light emitting unit E9 is a second light emitting unit Ea2 corresponding to the second key K2.

[0137] The migration guiding action can be performed by selecting four light emitting units E (E2, E4, E6, E8) from among the seven light emitting units E2 to E8 between the first light emitting unit Ea1 and the second light emitting unit Ea2 as the migration light emitting units Eb. That is, a part of the plurality of light emitting units E between the first light emitting unit Ea1 and the second light emitting unit Ea2 can be used for the migration guiding action.

[0138] As can be understood from the examples of the first to fifth embodiments, the guidance control unit 512 causes each of the plurality of transition light emitting units Eb to emit light in sequence in the direction from the first key K1 toward the second key K2. Matters such as the positions of the plurality of transition light emitting units Eb relative to the keyboard 21, the positions of the plurality of transition light emitting units Eb relative to the first light emitting unit Ea1 and the second light emitting unit Ea2, or whether the first light emitting unit Ea1 and the second light emitting unit Ea2 are included in the plurality of transition light emitting units Eb are arbitrary in the present invention.

[0139] (2) In the above-mentioned embodiments, the light emitting section E corresponding to one first key K1 is exemplified as the first light emitting section Ea1. However, sometimes, for example, when playing a chord, the performer operates a plurality of keys K in parallel. The guidance control section 512 may select the light emitting section E corresponding to the combination of the plurality of keys K played in parallel by the performer as the first light emitting section Ea1.

[0140] For example, the light-emitting part E corresponding to one key K (hereinafter referred to as "representative key K") representing multiple keys K can be selected as the first light-emitting part Ea1. The representative key K is the key K corresponding to the representative values ​​of multiple pitches played in parallel by the performer. The representative value is, for example, the central value of multiple pitches. For example, when the performer plays "ド(do)", "ミ(mi)", and "ソ(so)" in parallel, the guidance control part 512 selects the key K of the representative value "ミ(mi)" as the representative key K, and determines the light-emitting part E corresponding to the representative key K as the first light-emitting part Ea1. In the above manner, the representative key K can be interpreted as the first key K1, and the multiple keys K played in parallel by the performer can also be interpreted as the first key K1 respectively.

[0141] Similarly, the guidance control unit 512 can select the light-emitting unit E corresponding to the combination of the multiple keys K that the performer should play in parallel as the second light-emitting unit Ea2 corresponding to the second key K2. For example, the light-emitting unit E corresponding to the representative key K of the multiple keys K can be selected as the second light-emitting unit Ea2. In the above manner, the representative key K can be interpreted as the second key K2, and the multiple keys K played in parallel by the performer can also be interpreted as the second key K2.

[0142] (3) The luminous color of each light emitting section E is not limited to the above-mentioned examples. For example, in the first to third embodiments, the first light emitting section Ea1, the second light emitting section Ea2, and each transition light emitting section Eb are illustratively shown to emit light with different luminous colors (hues), but the first light emitting section Ea1, the second light emitting section Ea2, and each transition light emitting section Eb may also emit light with the same luminous color. That is, in the first to third embodiments, the first color, the second color, and the third color may be the same color or different colors.

[0143] The luminous colors of each luminous part E can be made different in accordance with the fingers used in the operation of each key K. For example, it is assumed that the music data M specifies the fingering in the music. That is, the music data M specifies the number of the finger to be used in the performance of each note in the music. The guidance control unit 512 causes the first luminous part Ea1 to emit light with the luminous color corresponding to the finger that should operate the first key K1, and causes the second luminous part Ea2 to emit light with the luminous color corresponding to the finger that should operate the second key K2. In addition, the guidance control unit 512 causes each transition luminous part Eb to emit light with the luminous color corresponding to the finger that should operate the first key K1 or the second key K2.

[0144] In addition, the light emitting color of the light emitting portion E may be different for the black key and the white key. For example, the guidance control portion 512 may make the light emitting color of the first light emitting portion Ea1 different when the first key K1 is a black key and when it is a white key. The guidance control portion 512 may make the light emitting color of the second light emitting portion Ea2 different when the second key K2 is a black key and when it is a white key. In addition, the guidance control portion 512 may make the light emitting color of each transition light emitting portion Eb different when the first key K1 or the second key K2 is a black key and when it is a white key.

[0145] (4) In the first to third embodiments, the first light emitting section Ea1 and the second light emitting section Ea2 emit light with different luminous colors, but the luminous characteristics other than the luminous colors may be different for the first light emitting section Ea1 and the second light emitting section Ea2. For example, the intensity of the emitted light (luminous intensity) of the light emitting section E or the luminous mode of the light emitting section E may be different for the first light emitting section Ea1 and the second light emitting section Ea2. The luminous mode is, for example, the way the light emitting section E flashes. For example, the flashing cycle or the time ratio of light emission and extinction are exemplified as the luminous mode.

[0146] In addition, in each of the above-mentioned methods, the first light emitting section Ea1 or the second light emitting section Ea2 and each transition light emitting section Eb emit light with different light colors, but the light emission characteristics other than the light emission color may be different between the first light emitting section Ea1 or the second light emitting section Ea2 and each transition light emitting section Eb. For example, the light emission intensity or light emission pattern may be different between the first light emitting section Ea1 or the second light emitting section Ea2 and each transition light emitting section Eb.

[0147] As understood from the above description, the “light emission characteristics” generally represent any characteristics related to the light emission of the light emitting unit E. For example, characteristics such as light emission color, light emission intensity, and light emission pattern are examples of “light emission characteristics”.

[0148] (5) In the first to third embodiments, a method of guiding the performer in transition between the first key K1 currently being operated by the performer and the second key K2 to be operated next is exemplified, but a method of further guiding the performer in transition between the keys K to be operated by the performer after the second key K2 is also envisioned.

[0149] For example, in Fig.19The figure shows the third key K3 that the performer should operate after the second key K2. The guidance control unit 512 causes the third light-emitting unit Ea3 corresponding to the third key K3 to emit light in the fourth color. The fourth color is a light-emitting color different from the first to third colors. In addition, in addition to causing each transition light-emitting unit Eb between the first key K1 and the second key K2 to emit light in sequence, the guidance control unit 512 also causes each transition light-emitting unit Eb between the second key K2 and the third key K3 to emit light in sequence in the direction toward the third key K3. It is arbitrary whether the light-emitting color of each transition light-emitting unit Eb between the first key K1 and the second key K2 is the same as the light-emitting color of each transition light-emitting unit Eb between the second key K2 and the third key K3.

[0150] In the above description, three keys K (K1 to K3) are illustrated for convenience, but the number of keys K to be guided to the performer is arbitrary. For example, the guidance control unit 512 can guide the performer to the multiple keys K corresponding to the notes in a specific interval of the music by emitting light from the light-emitting unit E corresponding to each key K. The interval to be guided is, for example, an interval corresponding to a predetermined number of bars in the music.

[0151] (6) In the first to third embodiments, the transition guidance action is repeatedly performed, but the transition guidance action may be performed only once. One transition guidance action is, for example, an action of causing a plurality of transition light emitting units Eb to emit light one at a time in a specific direction. That is, the guidance control unit 512 may perform one transition guidance action for each selection of the second key K2.

[0152] (7) In the first to third embodiments, the method of selectively making the plurality of transition light emitting portions Eb emit light is exemplified, but the plurality of transition light emitting portions Eb may be made to emit light in sequence by taking two or more adjacent portions in the direction of the X axis as a unit. Figure 4 , the guidance control unit 512 makes the light emitting unit E3 and the light emitting unit E4 emit light at time t2, makes the light emitting unit E4 and the light emitting unit E5 emit light at time t3, and makes the light emitting unit E5 and the light emitting unit E6 emit light at time t4. In addition, the two or more light emitting units E that emit light at each time point may not overlap each other. For example, the guidance control unit 512 may also make the light emitting unit E3 and the light emitting unit E4 emit light at time t2, and make the light emitting unit E5 and the light emitting unit E6 emit light at time t3.

[0153] (8) In the first to third embodiments, it is difficult for the player who is operating the first key K1 to recognize that the light emission of the second light-emitting portion Ea2 corresponding to the second key K2 is a state in which the first key K1 and the second key K2 are fully separated. In view of the above situation, it is preferred that the guidance control portion 512 performs a migration guidance action when the pitch difference between the first key K1 and the second key K2 is greater than a prescribed threshold value. When the pitch difference is less than the threshold value, the guidance control portion 512 does not perform the migration guidance action. According to the above method, there is an advantage of simplifying the light emission of multiple light-emitting portions E.

[0154] (9) In the above-mentioned embodiments, the following embodiments are exemplified in which the next key K is guided each time the player operates a key K. However, the method of guiding the player in conjunction with his / her performance is not limited to the above-mentioned embodiments.

[0155] For example, the control device 51 (guidance control unit 512) may also advance the guidance of the music performance in conjunction with the progress of the position in the music that the performer is currently playing (hereinafter referred to as the "performance position"). For example, in the fourth embodiment, when the performance position reaches a time point that is ahead of the starting point of each note in the music by a predetermined time, the control device 51 starts the control period C (first period Q1) corresponding to the note. According to the above method, the operation of each note can be guided with appropriate timing in conjunction with the performance of the performer. In addition, for the analysis of the performance position, a known performance analysis technology (distribution technology) such as the technology disclosed in Japanese Patent Gazette No. 2016-099512 is arbitrarily adopted.

[0156] (10) In the first to third embodiments, the method of making the plurality of transitional light emitting parts Eb light up in sequence is exemplified, but the method for guiding the player in the direction of the second key K2 relative to the first key K1 is not limited to the above exemplification. For example, the guidance control unit 512 may turn off each transitional light emitting part Eb in sequence in the direction from the first key K1 toward the second key K2 while making the plurality of transitional light emitting parts Eb light up. That is, the state of turning off each transitional light emitting part Eb is shifted to each of the plurality of transitional light emitting parts Eb over time.

[0157] In addition, the guidance control unit 512 can change the luminous color of each transitional luminous unit Eb in the direction from the first key K1 toward the second key K2 while making the plurality of transitional luminous units Eb emit light in a specific luminous color. That is, the state in which the luminous color of each transitional luminous unit Eb is changed transitions to each of the plurality of transitional luminous units Eb over time.

[0158] In the above manner, the direction of the second key K2 can also be guided to the performer. As understood from the above examples, the guidance control unit 512 is generally expressed as an element that changes the light emission of the plurality of transition light emitting units Eb over time. "The change of light emission over time" includes a change from one of light emission and extinguishing to the other and a change in light emission characteristics such as light emission color.

[0159] (11) An animation showing the performance of a piece of music may be played in conjunction with the performance of the keyboard instrument 10 by the performer. Fig. 20 1 is a block diagram of a performance system 100 according to a modified example. The performance system 100, like the fifth embodiment, includes a keyboard instrument 10 and a control system 50 that are configured separately from each other. However, the control system 50 may also be mounted on the keyboard instrument 10. In addition, the action of guiding the performance of the performer by the guiding device 40 of the keyboard instrument 10 is the same as the above-mentioned embodiments.

[0160] The storage device 52 of the control system 50 stores the animation data Z of the music. The animation data Z is data representing an animation related to the performance of the music. The animation represented by the animation data Z represents the performance of the music by a musical instrument different from the keyboard instrument 10 (hereinafter referred to as an "auxiliary musical instrument"). In addition, the animation represented by the animation data Z includes the musical sound of the auxiliary musical instrument. The musical sound represented by the animation data Z is the performance sound produced by the auxiliary musical instrument through the performance of the music.

[0161] The auxiliary musical instrument is, for example, a musical instrument other than the keyboard instrument 10 among a plurality of musical instruments corresponding to different playing parts of the music. For example, the keyboard instrument 10 corresponds to the playing part of the main melody of the music, and the auxiliary musical instrument is a musical instrument such as a string instrument corresponding to the playing part of the accompaniment sound of the music. For example, the way a performer skilled in playing the auxiliary musical instrument plays the music using the auxiliary musical instrument is recorded, thereby generating the animation data Z.

[0162] The control system 50 has the same elements as the above-mentioned embodiments (control device 51, storage device 52, operation device 53, communication device 54), and further includes a display device 55 and a sound reproduction device 56. The display device 55 and the sound reproduction device 56 are used as a reproduction device for reproducing the animation data Z.

[0163] The display device 55 displays the animation represented by the animation data Z based on the control of the control device 51. The display device 55 is composed of, for example, a liquid crystal panel or an organic EL panel. The sound-reproducing device 56 radiates the musical sound represented by the animation data Z based on the control of the control device 51. The sound-reproducing device 56 is, for example, a speaker. In addition, the display device 55 or the sound-reproducing device 56, which is separately configured from the control system 50, can be connected to the control system 50 by wire or wirelessly.

[0164] The control device 51 of the control system 50 advances the playback of the animation data Z in conjunction with the performance of the keyboard instrument 10 by the performer. The control device 51 can cause the display device 55 and the sound playback device 56 to play from any position (hereinafter referred to as the "playback position") in the animation represented by the animation data Z. The control device 51 estimates the performance position of the keyboard instrument 10 by the performer and controls the playback position of the animation data Z in conjunction with the performance position. Specifically, the animation of the part corresponding to the performance position in the music played by the auxiliary instrument is played by the display device 55 and the sound playback device 56. Therefore, the performer can play the keyboard instrument 10 according to the guidance of the guidance device 40 with the feeling of playing with the auxiliary instrument.

[0165] In addition, multiple display devices 55 can be used to play the animation data Z. For example, each of the multiple display devices 55 can display animations related to different types of auxiliary musical instruments. Similarly, the music corresponding to each of the multiple auxiliary musical instruments can also be radiated by different multiple sound emitting devices 56.

[0166] (12) As described above, the playback system 30 may be configured as a device separate from the keyboard instrument 10 . Fig.21 1 is a block diagram of a performance system 100 according to a modified example in which the playback system 30 and the keyboard instrument 10 are configured separately. Fig.21 The playback system 30 is an automatic musical instrument having a communication device 35, a sounding mechanism 36, and a driving device 37. For example, an automatic piano is used as the playback system 30. Fig.21 Although the embodiment in which the playback system 30 is omitted from the keyboard musical instrument 10 is illustrated, the sound source device 31 and the sound emitting device 32 may be mounted on the keyboard musical instrument 10 .

[0167] The communication device 35 communicates with the communication device 54 of the control system 50 by wire or wirelessly. The control system 50 sends the performance instruction to the playback system 30. The performance instruction is, for example, data that instructs the pronunciation of the pitch corresponding to the key K operated by the performer. For example, event data according to MIDI is exemplified as the performance instruction. In addition, the performance instruction of the notes corresponding to the performance parts other than the keyboard instrument 10 among the multiple performance parts of the music can be sent from the control system 50. For example, the performance instruction of the notes corresponding to the performance position of the performer of the keyboard instrument 10 among the multiple notes constituting the performance parts other than the keyboard instrument 10 is sent from the control system 50. The communication device 35 receives the performance instruction sent from the control system 50.

[0168] The sound-generating mechanism 36 is composed of a combination of a plurality of parts, and produces any one of a plurality of musical sounds through the mechanical movement of each part. The sound-generating mechanism 36 is, for example, a string-strike mechanism for striking a plurality of strings corresponding to different pitches. The driving device 37 drives the sound-generating mechanism 36 in accordance with the performance instruction received from the control system 50 by the communication device 35. That is, the driving device 37 drives the sound-generating mechanism 36 in such a manner that the musical sound specified by the performance instruction is produced. According to the above manner, the musical sound corresponding to the performance of the keyboard instrument 10 by the performer is produced by the playback system 30.

[0169] (13) In the above-mentioned embodiments, a method in which the key K and the light-emitting portion E correspond to each other in a one-to-one manner is exemplified, but the correspondence between each key K and each light-emitting portion E is not limited to the above-mentioned example. Specifically, a method in which the number of light-emitting portions E is greater than the number of keys K is also conceivable. For example, in addition to providing one light-emitting portion E near each key K, one light-emitting portion E may be provided between two adjacent keys K. According to the structure in which the number of light-emitting portions E is greater than the number of keys K, the light emission of each light-emitting portion E can be continuously transferred.

[0170] (14) In the first to third embodiments, the method of changing the light emission of each of the plurality of transition light emitting parts Eb with time is exemplified, but the method for guiding the direction of the second key K2 to the player is not limited to the method using the light emitting part E. For example, the following exemplified methods 1 to 3 are assumed.

[0171] [Method 1]

[0172] The direction of the second key K2 relative to the first key K1 can be guided to the performer by using a projection image obtained by a projection-type display device (projector). For example, the projection-type display device projects a long guide image in the direction of the X-axis onto the projection surface of the keyboard instrument 10. The guide control unit 512 controls the projection-type display device in such a way that the guide image changes in the direction from the first key K1 toward the second key K2. In the above manner, the performer who visually confirms the guide image can visually grasp the direction of the second key K2 that should be operated immediately thereafter.

[0173] [Method 2]

[0174] The direction of the second key K2 relative to the first key K1 can also be guided to the performer using a display image obtained by a direct-view display device. For example, a display device that is long in the direction of the X-axis is provided along the keyboard 21. The display device is composed of, for example, a liquid crystal panel or an organic EL (Electroluminescence) panel. The display device displays the guide image. The display device is controlled in such a way that the guide image changes in the direction from the first key K1 toward the second key K2. In the above manner, the performer who visually confirms the guide image can visually grasp the direction of the second key K2 that should be operated immediately thereafter.

[0175] [Method 3]

[0176] The direction of the second key K2 relative to the first key K1 can also be guided to the performer by using the display image of a display device (HMD: Head Mounted Display) worn on the user's head. The HMD displays a guide image that changes with time in the direction from the first key K1 to the second key K2, superimposed on the keyboard instrument 10 visually recognized by the performer. For example, a transparent HMD that can visually recognize the real space using the performer as the background of the guide image, or a non-transparent HMD that superimposes the guide image on the image of the keyboard instrument 10 captured by a camera. That is, the HMD displays the guide image through augmented reality (AR: Augmented Reality) or mixed reality (MR: Mixed Reality).

[0177] Furthermore, in the first to third embodiments, the display of the guide image for guiding the direction of the second key K2 relative to the first key K1 is envisioned (the first to third embodiments), but the fourth embodiment for guiding the target key K to the performer can also be applied to the first to third embodiments. Specifically, the guide image for guiding the target key K is displayed by the display device of the first to third embodiments.

[0178] As understood from the above description, one embodiment of the present invention is generally represented by a structure having an element (performance guide unit) that presents a guide display that changes over time in the direction from the first key K1 toward the second key K2 to the user. If the structures of the first to third embodiments are focused on, the performance guide unit is composed of a guide control unit 512 and a plurality of light-emitting units E, and the guide display is realized by the light emission of the plurality of light-emitting units E. In addition, in embodiment 1 using a projection-type display device, the performance guide unit is composed of a projection-type display device and a guide control unit 512. In embodiment 2 using a direct-view display device, the performance guide unit is composed of a direct-view display device and a guide control unit 512. In the embodiment using a display device, the guide display is realized by an image displayed by the display device.

[0179] (15) In the fourth embodiment, an example is given of a method in which the luminous color of the target luminous portion E is changed over time in the first period Q1 of the control period C. However, the luminous characteristics that change over time in the first period Q1 are not limited to the luminous color. For example, the guidance control unit 512 may change the luminous intensity of the target luminous portion E over time in the first period Q1. In addition, the guidance control unit 512 may change the luminous pattern (for example, the blinking cycle) of the target luminous portion E over time in the first period Q1.

[0180] In the fourth embodiment, an example is given of a method in which the target light emitting unit E emits light in the third color during the second period Q2 of the control period C, but the method of emitting light by the target light emitting unit E during the second period Q2 is not limited to the above example. For example, the guidance control unit 512 may change the light color or light intensity of the target light emitting unit E over time during the second period Q2. In addition, the guidance control unit 512 may also change the light emission pattern (e.g., blinking cycle) of the target light emitting unit E over time during the second period Q2.

[0181] As can be understood from the above description, the guidance control unit 512 of the fourth embodiment is generally expressed as an element that changes the light emission characteristics of the target light emitting unit E over time. As mentioned above, the "light emission characteristics" are any characteristics related to the light emission of the light emitting unit E. For example, characteristics such as light emission color, light emission intensity, and light emission pattern are examples of "light emission characteristics".

[0182] (16) In the fourth embodiment, the first period Q1 of the control period C may be of variable length. That is, the control device 51 may change the time length of the first period Q1. For example, it is assumed that the time length of the first period Q1 is specified by the music data M. For example, the time length of the first period Q1 is specified as a numerical value of a control change or speed of the music data M. In addition, it is assumed that the time length of the first period Q1 is set in accordance with the performance speed T of the music. Specifically, the faster the performance speed T, the shorter the time length of the first period Q1 is set by the control device 51.

[0183] It is also conceivable to set the time length of the first period Q1 in accordance with the interval between successive beats in the music (hereinafter referred to as the "beat cycle"). For example, the control device 51 (guidance control unit 512) estimates the beat of the music by analyzing the performer's performance of the keyboard instrument 10. Moreover, the control device 51 (guidance control unit 512) sets the time length of the first period Q1 to, for example, an integer multiple of the beat cycle. According to the above method, in the part of the music where the interval between successive notes is short, the first period Q1 during which the light emission of each light-emitting part E lasts is controlled to be a short time. Therefore, the number of light-emitting parts E that emit light in parallel is reduced, and as a result, the burden on the performer to confirm the guidance can be reduced.

[0184] In addition, in the above description, the time length of the first period Q1 is focused on for convenience, but the time length of the control period C or the second period Q2 can also be a variable length. The control of the time length of the control period C or the second period Q2 is carried out by the same method as the method described above for the control of the time length of the first period Q1.

[0185] (17) In the fourth embodiment, the time point at which the performer should operate the target key K is exemplified as the target time point tc, but the relationship between the time point at which the target key K should be operated and the control period C for controlling the light emission of the target light emitting portion E is not limited to the above example. For example, the control period C may be started from the time point at which the target key K should be operated. The control period C may be ended at the time point at which the target key K should be operated. In addition, in the fourth embodiment, the control period C is exemplified as including the first period Q1 and the second period Q2, but the distinction between the first period Q1 and the second period Q2 may be omitted. That is, the light emission of the target light emitting portion E may be continuously controlled from the start point to the end point of the control period C.

[0186] (18) In the sixth embodiment, the mounting substrate 42 on which the plurality of light emitting units E are mounted is provided on the keyboard cover 12, but the plurality of light emitting units E may be directly provided on the keyboard cover 12. For example, the light emitting units E may be respectively accommodated in a plurality of mounting holes provided on the inner surface 13 of the keyboard cover 12. That is, the mounting substrate 42 may be omitted.

[0187] (19) The location where the guide device 40 is provided is not limited to the above-mentioned examples. For example, in a mode where each key K is formed of a light-transmitting material, the light-emitting portion E corresponding to each key K may be provided inside the key K. That is, the guide device 40 may be mounted on the keyboard unit 20.

[0188] (20) In the sixth embodiment in which the guide device 40 is provided on the keyboard cover 12, a wireless power supply device for wirelessly supplying power to the guide device 40 may be provided on the frame 11. For wireless power supply to the guide device 40, any power supply method such as electromagnetic induction, magnetic resonance, electric field coupling, or electromagnetic wave is adopted.

[0189] Wireless power supply to the guide device 40 may be started in conjunction with the displacement of the keyboard cover 12. For example, a sensor for detecting the opening and closing of the keyboard cover 12 is provided on the keyboard instrument 10. The wireless power supply device starts wireless power supply to the guide device 40 when the keyboard cover 12 is moved from the closed state to the open state. In addition, the wireless power supply device stops wireless power supply to the guide device 40 when the keyboard cover 12 is moved from the open state to the closed state. According to the above method, compared with a method of supplying power to the guide device 40 regardless of the state of the keyboard cover 12, power consumption can be reduced.

[0190] (21) In parallel with the operations exemplified in the above-mentioned embodiments, the approximate positions where the performer should place the right and left hands can be guided to the performer by lighting the plurality of light emitting units E. For example, the guidance control unit 512 causes the light emitting units E corresponding to the positions of the performer's right and left hands to light using a light color different from that of the light emitting units E (Ea1, Ea2, Eb) in the above-mentioned performance guidance processing.

[0191] (22) In each of the above-mentioned embodiments, an electronic musical instrument equipped with a sound source device 31 that generates an acoustic signal is exemplified as the keyboard musical instrument 10, but the present invention can be applied to a natural musical instrument that is not equipped with a sound source device 31. For example, the present invention can also be applied to a keyboard musical instrument having a sound producing mechanism that produces sound in conjunction with the operation of each key K. The sound producing mechanism is, for example, a string striking mechanism that strikes a string in conjunction with the displacement of the key K. In addition, the keyboard musical instrument 10 can have both the sound source device 31 and the sound producing mechanism.

[0192] (23) The functions of the control system 50 involved in each of the aforementioned methods are realized as described above by the coordinated action of a single or multiple processors constituting the control device 51 and the program stored in the storage device 52. The program exemplified above can be provided in the form of being stored in a computer-readable recording medium and installed in the computer. The recording medium is, for example, a non-transitory recording medium, preferably an optical recording medium (optical disc) such as a CD-ROM, and also includes any known form of recording medium such as a semiconductor recording medium or a magnetic recording medium. In addition, as a non-transitory recording medium, it includes any recording medium other than a temporary transmission signal (transitory, propagating signal), and volatile recording media may not be excluded. In addition, in a structure in which a transmission device transmits a program via a communication network, in the transmission device, the recording medium that stores the program is equivalent to the aforementioned non-transitory recording medium.

[0193] H: Appendix

[0194] According to the above-exemplified embodiment, for example, the following configuration can be understood.

[0195] One embodiment (embodiment 1) of the present invention involves a performance system having: a plurality of keys; a plurality of light-emitting parts arranged along the plurality of keys; and a guidance control part, which guides the keys to be operated among the plurality of keys by causing the light emission of at least one of the plurality of light-emitting parts to vary over time. In the above embodiment, the keys to be operated among the plurality of keys are guided by causing the light emission of at least one of the plurality of light-emitting parts to vary over time. Therefore, compared with a structure that controls only the light emission / extinguishing of the light-emitting parts corresponding to the keys to be operated by the performer, it is possible to effectively guide the performer to operate the plurality of keys.

[0196] In addition, in a state where the first key to be operated at a certain point in time and the second key to be operated immediately thereafter are sufficiently separated, the user may not be able to quickly grasp the light emission of the light emitting portion corresponding to the second key after operating the first key. In consideration of the above situation, in a specific example (method 2) of method 1, the guidance control portion changes the light emission of two or more light emitting portions among the plurality of light emitting portions over time in a direction from the first key among the plurality of keys toward the second key to be operated after the first key. In the above method, the light emission of the two or more light emitting portions changes over time in a direction from the first key toward the second key. The performer can visually and intuitively grasp the direction in which his or her finger should be moved in order to operate the second key after the first key. Therefore, compared with a method in which, for example, only one light emitting portion corresponding to the key to be operated among the plurality of light emitting portions is illuminated, the performer's performance can be effectively guided. For example, in a state where the first key and the second key are sufficiently separated, the user may not be able to quickly grasp the light emission of the light emitting portion corresponding to the second key after operating the first key. According to the present invention, since the direction in which the finger should be moved for operating the second key is guided, the player can easily master the second key.

[0197] In a specific example of method 2 (method 3), the two or more light-emitting parts include a light-emitting part between the first light-emitting part corresponding to the first key and the second light-emitting part corresponding to the second key among the multiple light-emitting parts. According to the above method, for the two or more light-emitting parts including the light-emitting part between the first light-emitting part corresponding to the first key and the second light-emitting part corresponding to the second key that should be operated after the first key, the light emission changes over time. Therefore, compared with a method of controlling the light emission of two or more light-emitting parts selected independently of the first light-emitting part and the second light-emitting part, it is easy for the performer to visually and intuitively grasp the direction and distance in which his or her fingers should be moved in order to operate the second key after the first key. In addition, the two or more light-emitting parts may include the first light-emitting part or the second light-emitting part.

[0198] In a specific example (method 4) of method 2 or method 3, the guide control unit causes the two or more light-emitting units to emit light in sequence in the direction from the first key toward the second key. According to the above method, by visually confirming that the two or more light-emitting units emit light in sequence, the performer can visually and intuitively grasp the direction in which his or her finger should be moved in order to operate the second key.

[0199] In a specific example (method 5) of any one of the methods 2 to 4, the guidance control unit causes the second light emitting unit to emit light after executing the action of causing the light emission of the two or more light emitting units to change over time. According to the above method, the performer can grasp the direction in which his / her finger should be moved by visually observing the light emission of the two or more light emitting units in sequence, and can also accurately grasp the position of the second key to be operated next to it by visually observing the light emission of the second light emitting unit.

[0200] In a specific example (method 6) of any one of the methods 2 to 5, the guidance control unit repeatedly performs an action of changing the light emission of the two or more light emitting units over time. In the above method, the action of changing the light emission of the two or more light emitting units over time in the direction from the first key toward the second key is repeated multiple times. Therefore, the performer can reliably and easily grasp the direction and distance in which his or her finger should be moved in order to operate the second key.

[0201] In a specific example (method 7) of any one of the methods 2 to 5, the guidance control unit controls the speed at which the light emission of the two or more light emitting units changes over time in accordance with the performance speed of the music. According to the above method, the performer can roughly grasp the performance speed of the music by visually confirming the speed at which the light emission of the two or more light emitting units changes.

[0202] In a specific example (method 8) of any one of the methods 2 to 7, the guidance control unit controls the speed at which the light emission of the two or more light emitting units changes over time according to the duration of the note corresponding to the first key in the music. According to the above method, the performer can grasp the length of time that the operation of the first key should be continued by confirming the speed of the light emission change of the two or more light emitting units.

[0203] In a specific example of mode 1 (mode 9), the guidance control unit changes the light emission characteristics of the light emission unit corresponding to the key to be operated among the plurality of light emission units over time. In the above mode, the light emission characteristics of the light emission unit corresponding to the key to be operated among the plurality of light emission units change over time. Therefore, compared with a structure that controls the light emission / extinguishing of the light emission unit corresponding to the key to be operated by the performer only in a binary manner, it is possible to effectively guide the performer to operate the plurality of keys.

[0204] Another embodiment of the present invention (embodiment 10) involves a performance system having: a plurality of keys; and a performance guide unit that presents a guidance display to a user that changes over time in a direction from a first key among the plurality of keys toward a second key that should be operated after the first key. In the above embodiment, the guidance display changes over time in a direction from the first key toward the second key. The performer can visually and intuitively grasp the direction in which his or her fingers should be moved in order to operate the second key after the first key. Therefore, compared with, for example, a method in which only one light-emitting unit corresponding to the key to be operated among a plurality of light-emitting units is illuminated, the performer's performance can be effectively guided.

[0205] A control system involved in one embodiment of the present invention (embodiment 11) is a system for controlling a keyboard instrument, the keyboard instrument comprising: a plurality of keys; and a plurality of light-emitting portions arranged along the plurality of keys, the control system comprising: a music processing portion which determines a key to be operated among the plurality of keys; and a guidance control portion which guides a key to be operated among the plurality of keys by varying the light emission of one or more of the plurality of light-emitting portions over time.

[0206] A control method involved in one embodiment of the present invention (method 12) is a method for controlling a keyboard instrument, which has: a plurality of keys; and a plurality of light-emitting portions arranged along the plurality of keys. In the control method, a key to be operated among the plurality of keys is determined, and the key to be operated among the plurality of keys is guided by causing the light emission of more than one light-emitting portion among the plurality of light-emitting portions to change over time.

[0207] Description of the label

[0208] 100…performance system, 10…keyboard instrument, 11…frame, 12…keyboard cover, 13…inner surface, 14…installation groove, 20…keyboard unit, 21…keyboard, 22…detection device, K…key, 30…playback system, 31…sound source device, 32…playback device, 35…communication device, 36…sound producing mechanism, 37…driving device, 40…guiding device, E…light emitting unit, 41…driving circuit, 42…installation substrate, 50…control system, 51…control device, 511…music processing unit, 512…guidance control unit, 52…storage device, 53…operating device, 54…communication device, 55…display device, 56…playback device, 60…communication device.

Claims

1. A performance system, comprising: Multiple keys; a plurality of light emitting portions arranged along the plurality of keys; and The guidance control unit guides the key to be operated among the plurality of keys by changing the light emission of one or more light emitting units among the plurality of light emitting units with time.

2. The performance system according to claim 1, wherein: The guidance control unit changes the light emission of two or more light emitting units among the plurality of light emitting units with time in a direction from a first key among the plurality of keys toward a second key to be operated after the first key.

3. The performance system according to claim 2, wherein: The two or more light emitting sections include a light emitting section between a first light emitting section corresponding to the first key and a second light emitting section corresponding to the second key among the plurality of light emitting sections.

4. The performance system according to claim 3, wherein: The guide control unit causes each of the two or more light emitting units to emit light sequentially in a direction from the first key toward the second key.

5. The performance system according to claim 4, wherein: The guidance control unit causes the second light emitting unit to emit light after executing an operation of causing the light emission of the two or more light emitting units to change over time.

6. The performance system according to claim 2, wherein: The guidance control unit repeatedly performs an operation of changing the light emission of the two or more light emitting units over time.

7. The performance system according to claim 2, wherein: The guidance control unit controls the speed at which the light emission of the two or more light emitting units changes with time according to the performance speed of the music.

8. The performance system according to claim 2, wherein: The guidance control unit controls a speed at which the light emission of the two or more light emitting units changes over time, according to a duration of a note corresponding to the first key in the music.

9. The performance system according to claim 1, wherein: The guidance control unit changes the light emission characteristics of a light emitting unit corresponding to a key to be operated among the plurality of light emitting units over time.

10. A performance system, comprising: Multiple keys; and The performance guide unit presents a guidance display to the user that changes with time in a direction from a first key among the plurality of keys toward a second key that should be operated after the first key.

11. A control system for controlling a keyboard instrument, the keyboard instrument comprising: a plurality of keys; and a plurality of light emitting portions arranged along the plurality of keys. The control system has: a music processing section that determines a key that should be operated among the plurality of keys; and The guidance control unit guides the key to be operated among the plurality of keys by changing the light emission of one or more light emitting units among the plurality of light emitting units with time.

12. A control method, which is a method for controlling a keyboard instrument, the keyboard instrument having: a plurality of keys; and a plurality of light emitting parts arranged along the plurality of keys, The control method is implemented by a computer system. In the control method, determining a key among the plurality of keys that should be operated, By changing the light emission of one or more of the plurality of light emitting units over time, a key to be operated among the plurality of keys is guided.

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