WO2024057766A1

WO2024057766A1 - Musical playing system, control system, and control method

Info

Publication number: WO2024057766A1
Application number: PCT/JP2023/028539
Authority: WO
Inventors: 安樹絵檜尾; 宗一瀧川; 和彦山本; 陽前澤; 琢哉藤島; 涼彌薄羽
Original assignee: ヤマハ株式会社
Priority date: 2022-09-16
Filing date: 2023-08-04
Publication date: 2024-03-21
Also published as: JP2024043174A

Abstract

This musical playing system 100 comprises: a plurality of keys K; a plurality of light-emitting units E arranged along the plurality of keys K; and a guidance control unit that, over time, varies the emission of light by one or more light-emitting units E from among the plurality of light-emitting units E, thereby issuing guidance indicating keys to be operated from among the plurality of keys K.

Description

Performance system, control system and control method

The present disclosure relates to a technique for guiding the performance of a musical instrument.

Various techniques have been proposed in the past for guiding a player in playing a keyboard instrument. For example, Patent Document 1 discloses a performance training device that causes one LED (Light Emitting Diode), among a plurality of LEDs (Light Emitting Diodes) installed near different keys, to emit light, which corresponds to the key that the player is to operate. ing.

Patent No. 4496882

However, it is actually not easy for an inexperienced performer to perform smoothly by simply lighting up the LED corresponding to the key to be operated. In consideration of the above circumstances, one aspect of the present disclosure aims to effectively guide a player in operating a plurality of keys.

In order to solve the above problems, a performance system according to one aspect of the present disclosure includes a plurality of keys, a plurality of light emitting sections arranged along the plurality of keys, and one of the plurality of light emitting sections. A guide control section is provided that guides the key to be operated among the plurality of keys by changing the light emission of the above-mentioned light emitting section over time.

A performance system according to another aspect of the present disclosure includes a plurality of keys, and a performance system that sequentially moves from a first key of the plurality of keys toward a second key to be operated next to the first key. The apparatus includes a performance guide section that presents a changing guide display to the user.

A performance system according to one aspect of the present disclosure is a system for controlling a keyboard instrument including a plurality of keys and a plurality of light emitting parts arranged along the plurality of keys, By changing over time the light emission from one or more light emitting parts of the plurality of light emitting parts and the music processing part that identifies the key to be operated, the key to be operated among the plurality of keys can be determined. and a guidance control section that provides guidance.

A control method according to one aspect of the present disclosure is a method for controlling a keyboard instrument including a plurality of keys and a plurality of light emitting parts arranged along the plurality of keys, the method comprising: The key to be operated is identified, and the light emission from one or more of the plurality of light emitting parts is changed over time to guide the key to be operated among the plurality of keys.

FIG. 1 is a plan view of the performance system in the first embodiment. FIG. 1 is a block diagram illustrating the configuration of a control system. FIG. 2 is a block diagram illustrating a functional configuration of a control system. It is an explanatory diagram of transition guidance operation. It is an explanatory diagram of transition guidance operation. It is a flowchart of performance guidance processing. It is an explanatory view of operation of a guidance control part in a 4th embodiment. It is a flow chart of performance guide processing in a 4th embodiment. It is an explanatory view about light emission of each light emitting part in a 4th embodiment. It is a block diagram which illustrates the structure of the performance system in 5th Embodiment. It is a perspective view of the keyboard instrument in a 6th embodiment. FIG. 3 is a sectional view of the keyboard lid. It is an explanatory view of transition guidance operation in a modification. It is an explanatory view of transition guidance operation in a modification. It is an explanatory view of transition guidance operation in a modification. It is an explanatory view of transition guidance operation in a modification. It is an explanatory view of transition guidance operation in a modification. It is an explanatory view of transition guidance operation in a modification. It is an explanatory view of transition guidance operation in a modification. It is a block diagram which illustrates the structure of the performance system in a modification. It is a block diagram which illustrates the structure of the performance system in a modification.

A: First Embodiment FIG. 1 is a plan view of a performance system 100 according to a first embodiment. The performance system 100 is an electronic musical instrument that emits musical tones in response to a performance by a player, and includes a keyboard instrument 10 and a control system 50. The keyboard instrument 10 is an electronic keyboard instrument that includes 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.

The keyboard unit 20 includes a keyboard 21 and a detection device 22. The keyboard 21 is composed of a number of keys K corresponding to different pitches. Each key K is a performance operator that accepts operation by the performer (specifically, key pressing and key release). The keys K include a number of white keys and a number of black keys. The keys K are arranged along the X-axis. The X-axis is an axis that extends in the left-right direction of the performer. In the following description, one direction along the X-axis is referred to as the X1 direction, and the other direction along the X-axis is referred to as the X2 direction. The X1 direction corresponds to the right of the performer, and the X2 direction corresponds to the left of the performer.

The detection device 22 is a sensor that detects operations on each of the plurality of keys K. Specifically, the detection device 22 detects the player's operation of playing each key K (ie, key press) and the release of the operation (ie, key release). The detection device 22 includes, for example, a sensor that detects the displacement of each key K optically, mechanically, or magnetically.

The reproduction system 30 reproduces musical tones according to the performance by the performer. Specifically, the reproduction system 30 includes a sound source device 31 and a sound emitting device 32. The sound source device 31 generates an acoustic signal according to a performance by a performer. The acoustic signal is a signal representing a musical tone corresponding to the key K operated by the performer. That is, the sound source device 31 generates an acoustic signal of a pitch corresponding to the key K operated by the performer among a plurality of pitches.

The sound emitting device 32 emits the musical tone represented by the acoustic signal. For example, one or more speakers are used as the sound emitting device 32. Note that headphones worn on the player's head may be used as the sound emitting device 32. Further, a reproduction system 30 or a sound emitting device 32 configured separately from the keyboard instrument 10 may be connected to the keyboard instrument 10 by wire or wirelessly.

The guide device 40 is an output device that sequentially guides the player to operate the keys K out of a plurality of keys K. The guide device 40 includes a plurality of light emitting sections E corresponding to different keys K of the keyboard 21, and a drive circuit 41 that drives each light emitting section E. Each of the plurality of light emitting parts E is configured with one or more light emitting elements such as LEDs. Note that the shape of the light emitting part E is arbitrary. Light emission/extinguishment and emission color of each light emitting section E are variably controlled for each light emitting section E.

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

The control device 51 is composed of one or more processors that control each element of the keyboard instrument 10. Specifically, the control device 51 includes, for example, 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 ( It consists of one or more types of processors such as Application Specific Integrated Circuits.

The storage device 52 is one or more 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. Note that the storage device 52 may be configured by a combination of multiple types of recording media. Further, a portable recording medium that can be attached to and detached from the control system 50 or an external recording medium (for example, online storage) with which the keyboard instrument 10 can communicate may be used as the storage device 52.

The storage device 52 stores music data M. The music data M is data that specifies a time series (i.e., a musical score) of a plurality of notes constituting a music piece. Specifically, the music data M specifies the pitch and sound period for each of a plurality of notes of the music. The pitch is specified by a number representing a scale note. The pitch is also expressed as information specifying one key K on the keyboard 21. The sound production period is specified by the times of the start and end points of the note.

As understood from the above explanation, the music data M is data that specifies the keys K to be operated by the performer in chronological order. For example, a file in a format compliant with the MIDI (Musical Instrument Digital Interface) standard is used as the music data M. The start point of a note sound period is specified by a note-on event, and the end point of a note sound period is specified by a note-off event.

The operating device 53 is an input device that accepts instructions from the performer. For example, as illustrated in FIG. 1, a plurality of operators operated by a user are illustrated as the operating device 53. Note that a touch panel that detects a touch by a player may be employed as the operating device 53.

Note that the control device 51 may realize the functions of the sound source device 31 by executing a program stored in the storage device 52. That is, the element (sound source section) that generates the acoustic signal may be either a software sound source realized by the general-purpose control device 51 or a hardware sound source realized by a dedicated electronic circuit (sound source device 31).

FIG. 3 is a block diagram illustrating the functional configuration of the control system 50. The control device 51 realizes a plurality of functions (music processing section 511, guidance control section 512) for guiding the player to operate each key of the keyboard 21 by executing a program stored in the storage device 52. do.

The music processing unit 511 sequentially identifies the keys K to be operated by the performer by analyzing the music data M. The identification of each key K by the music processing unit 511 is performed in parallel with the performance by the performer. Note that in a configuration in which a plurality of pieces of music data M corresponding to different songs are stored in the storage device 52, the music processing unit 511 processes one piece of music data M selected by the performer by operating the operating device 53. .

The guidance control unit 512 controls the guidance device 40 according to the music data M. Specifically, the guide control unit 512 sequentially causes each of the plurality of light emitting units E of the guide device 40 to emit light according to the music data M, thereby controlling the key K to be operated by the performer in order to play the music. to guide you. Note that the operation of the guide control unit 512 to cause each light emitting unit E to emit light can also be expressed as an operation of assisting the performer in playing the music, or an operation of teaching the performer how to play the music.

FIG. 4 is an explanatory diagram of the operation of the guidance control section 512. In FIG. 4, the temporal transition of the light emitting state by each light emitting unit E is illustrated with the time axis pointing downward in the drawing. In FIG. 4, nine light emitting parts E (E1 to E9) of the guide device 40 are illustrated for convenience.

The guide control unit 512 causes the light emitting unit E of the plurality of light emitting units E of the guide device 40, which corresponds to the key K to be played next by the player, to emit light in the first color. That is, the light emission of the light emitting part E in the first color is a display that guides in advance the operation of the key K corresponding to the light emitting part E. When the player actually operates the key K guided by the first color of light emission, 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 emission colors. Further, when the operation of the key K is released (key released), the guide control section 512 turns off the light emitting section E corresponding to the key K. Note that when the player operates a key K, the guide control section 512 may turn off the light emitting section E corresponding to the key K.

Assume that a performer operates the first key K1 and the second key K2 in order. The second key K2 is the key K to 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 order 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 further in the X1 direction (to the right) than the first key K1.

In FIG. 4, it is assumed that the performer operates the first key K1 between time t1 and time t2. Therefore, the emitted light color of the light emitting part E corresponding to the first key K1 (hereinafter referred to as "first light emitting part Ea1") among the plurality of light emitting parts E changes from the first color to the second color at time t2. Further, as a result of the actual operation of the first key K1, the key K to be played next by the player is updated from the first key K1 to the second key K2. Therefore, among the plurality of light emitting parts E, the light emitting part E corresponding to the second key K2 (hereinafter referred to as "second light emitting part Ea2") starts emitting light in the first color at time t2. Furthermore, at time t6 when the operation of the first key K1 is released, the first light emitting section Ea1 is turned off.

In FIG. 4, it is assumed that the performer operates the second key K2 between time t6 and time t7. Therefore, the emitted light color of the second light emitting section Ea2 corresponding to the second key K2 changes from the first color to the second color at time t7. The above operations are repeated throughout the song. Therefore, the performer can perform the music according to the guidance provided by the guide device 40 while checking the light emission/extinguishment of each light emitting section E and the color of the light emission at any time.

In parallel with the above-mentioned operation of sequentially guiding the keys K to be operated by the performer by the light emission of the light emitting unit E, the guidance control unit 512 performs an operation (hereinafter referred to as “guidance”) for guiding the transition of the keys K to be operated by the performer. (referred to as "transition guidance operation"). The transition guidance operation is an operation that notifies the performer of the transition from the first key K1 to the second key K2.

The transition guide operation is an operation in which each of the two or more transition light emitting parts Eb (Lb1 to Lb5) sequentially causes light to emit light 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 depending on the pitch difference between the first key K1 and the second key K2. In the transition guidance operation, the guidance control section 512 sequentially causes each of the plurality of transition light emitting sections Eb to emit light in the third color. The third color is a different emitted color from the first and second colors.

In the example of FIG. 4, the second key K2 is located further in the X1 direction than the first key K1. Therefore, the guide control section 512 sequentially causes each of the five transition light emitting sections Eb1 to Lb5 to emit light in the order of arrangement along the X1 direction. That is, at time t2 when the transition guide operation is started, the leftmost transition light emitting section Eb1 of the five transition light emitting sections Eb1 to Lb5 emits light, at time t3 the transition light emitting section Eb2 emits light, and at time t4, the leftmost transition light emitting section Eb1 emits light. The transition light emitting section Eb3 emits light, the transition light emitting section Eb4 emits light at time t5, and the rightmost transition light emitting section Eb5 among the five emits light at time t6. That is, the state of emitting light in the third color changes over time to each of the plurality of transition light emitting parts Eb. As can be understood from the above explanation, the direction in which the light emission of the transition light emitting section Eb transitions (X1 direction) is such that the player who is operating the first key K1 moves his/her finger to operate the next second key K2. This is the direction in which it should be moved.

As illustrated in FIG. 4, among the plurality of transition light emitting parts Eb, the leftmost transition light emitting part Eb1 closest to the first light emitting part Ea1 emits light in parallel with the first light emitting part Ea1. That is, the guide control section 512 causes the first light emitting section Ea1 to emit light during a period that includes at least the time point (time t3) at which the transition light emitting section Eb1 emits light. Similarly, among the plurality of transition light emitting parts Eb, the rightmost transition light emitting part Eb5 closest to the second light emitting part Ea2 emits light in parallel with the second light emitting part Ea2. That is, the guide control section 512 causes the second light emitting section Ea2 to emit light during a period that includes at least the time point (time t6) at which the transition light emitting section Eb5 emits light. Therefore, the performer can grasp the direction in which the finger should be moved by visually checking how each of the plurality of transition light emitting parts Eb sequentially emits light, and also can control the light emission of the first light emitting part Ea1 and the second light emitting part Ea2. By visually checking, the first key K1 and the second key K2 to be operated in succession can also be grasped.

As illustrated by arrow A in FIG. 4, the transition guidance operation is repeated until the second key K2 is operated. That is, the guidance control unit 512 ends the transition guidance operation when the second key K2 is operated. Therefore, the player can reliably and easily grasp the direction and distance to which his or her fingers should be moved in order to operate the second key K2.

FIG. 5 illustrates 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 (leftward) than the first key K1. Therefore, in the situation of FIG. 5, the guide control unit 512 sequentially causes each of the five transition light emitting units Eb1 to Lb5 to emit light in the order of arrangement along the X2 direction. As described above, in the first embodiment, the light emission of the plurality of transitional light emitting parts Eb changes over time in the direction from the first key K1 to the second key K2.

FIG. 6 is a flowchart of a process (hereinafter referred to as "performance guidance process") in which the control device 51 controls each light emitting section E. The performance guidance process is started in response to an instruction from the player to the operating device 53. Performance guidance processing is executed in parallel with the generation of the acoustic signal. The guidance control unit 512 in FIG. 4 is realized by the control device 51 executing the performance guidance process.

The control device 51 executes a transition guidance operation (Sa1). That is, the control device 51 sequentially causes each of the plurality of transitional light emitting sections Eb to emit light in the direction from the first key K1, which should have been operated immediately before, to the second key K2, which should have operated next.

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

On the other hand, when the second key K2 is operated (Sa2: YES), the control device 51 updates the light emitting state of each light emitting section E (Sa3). Specifically, the control device 51 turns off the first light emitting section Ea1 corresponding to the current first key K1. The control device 51 updates the second key K2 operated by the performer to a 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. do. Further, the control device 51 specifies a new second key K2 by referring to the music data M, and causes the second light emitting section Ea2 corresponding to the second key K2 to emit light in the first color.

After updating the light emitting state through the above procedure, the control device 51 moves the process to step Sa1 and executes a transition guidance operation (Sa1). In the transition guidance operation, each of the plurality of transition light emitting parts Eb sequentially emits light in the direction from the updated first key K1 to the updated second key K2.

As explained above, in the first embodiment, the second key K2 to be operated by the player is guided by changing the light emission of each of the plurality of light emitting parts E over time. Therefore, compared to a configuration in which only the light emission/extinguishing of the light emitting section E corresponding to the key K to be operated by the player is controlled, the player's operation of a plurality of keys can be effectively guided.

In the first embodiment, in particular, the light emission of the plurality of transition light emitting parts Eb changes over time in the direction from the first key K1 to the second key K2. The player can visually and intuitively grasp the direction in which his or her fingers should be moved in order to operate the second key K2. Therefore, compared to, for example, a configuration in which only one light emitting part E corresponding to the key K to be operated out of the plurality of light emitting parts E emits light, it is possible to effectively guide the player in playing the keyboard instrument 10.

Further, in the first embodiment, between the first light emitting part Ea1 corresponding to the first key K1 and the second light emitting part Ea2 corresponding to the second key K2 to be operated next to the first key K1. The light emission changes over time for the plurality of transition light emitting parts Eb located therein. Therefore, compared to a configuration in which the light emission of a plurality of transitional light emitting parts Eb selected independently of the first light emitting part Ea1 and the second light emitting part Ea2 is controlled, the player can control the light emission due to the operation of the second key K2. It is easy to visually and intuitively grasp the direction and distance to which one's fingers should be moved.

B: Second Embodiment The second embodiment will be described. In addition, in each aspect illustrated below, for elements whose functions are similar to those in the first embodiment, the same reference numerals as in the description of the first embodiment are used, and detailed descriptions of each are omitted as appropriate.

The control device 51 of the second embodiment functions as a music processing section 511 and a guidance control section 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 an instruction from the performer to the operating device 53. Note that the method of setting the performance speed T is arbitrary. For example, the music processing unit 511 may set the performance speed T to a numerical value specified by the music data M.

In the transition guidance operation, the guidance control unit 512 of the second embodiment changes the speed (hereinafter referred to as "transition speed") Va at which the light emission of the plurality of transition light emitting parts Eb is changed over time according to the performance speed T of the music. Control.

The transition speed Va is, for example, the speed at which the state of emitting light in the third color sequentially shifts to each of the plurality of transition light emitting parts Eb. The transition speed Va is also expressed as an index of the frequency at which the light emission of each transition light emitting portion Eb changes within a unit time. For example, the period from when each transitional light emitting section Eb goes out until the next transitional light emitting section Eb emits light, or the period during which each transitional light emitting section Eb emits light, becomes shorter as the transition speed Va is higher.

Specifically, the guidance control unit 512 sets the transition speed Va to a higher speed as the performance speed T is higher. For example, assume that the playing speed T can be set to a numerical value T1 and a numerical value T2. The numerical value T1 exceeds the numerical value T2 (T1>T2). The transition speed Va1 when the performance speed T is set to the numerical value T1 exceeds the transition speed Va2 when the performance speed T is set to the numerical value T2 (Va1>Va2).

Note that the change in the transition speed Va with respect to the performance speed T may be a linear change or a curved change. Furthermore, the range in which the transition speed Va does not change with respect to changes in the performance speed T may be included in the numerical range of the performance speed T.

The operations other than the control of the transition speed Va are the same as in the first embodiment. Therefore, the second embodiment also achieves the same effects as the first embodiment. Further, in the second embodiment, the performer can roughly grasp the performance speed T of the music by visually checking the speed at which the light emission of the plurality of transition light emitting parts Eb changes (transition speed Va). .

C: Third Embodiment The control device 51 of the third embodiment functions as a music processing section 511 and a guidance control section 512 similarly to the first embodiment. The music processing unit 511 of the third embodiment specifies the duration L of each note. The duration L is the length of time one note continues. Specifically, the music processing unit 511 calculates the duration L from the start point time and end point time of the sound generation period specified by the music data M for each note.

In the transition guidance operation, the guidance control unit 512 of the third embodiment adjusts the transition speed Va, which changes the light emission of the plurality of transition light emitting units Eb over time, to the duration L of the note corresponding to the first key K1 in the music piece. Control accordingly. That is, the transition speed Va from the first key K1 to the second key K2 changes depending on the duration L of the note corresponding to the first key K1 being operated by the performer.

Specifically, the guidance control unit 512 sets the transition speed Va to a higher speed as the duration L is shorter. For example, consider a case where the duration L can be set to a value L1 and a value L2. The value L1 is lower than the value L2 (L1<L2). The transition speed Va1 when the duration L of the note corresponding to the first key K1 is the value L1 is higher than the transition speed Va2 when the duration L is the value L2 (Va1>Va2).

Note that the change in the transition speed Va with respect to the duration L may be a linear change or a curved change. Further, a range in which the transition speed Va does not change with respect to a change in the duration L may be included in the numerical range of the duration L.

The operations other than the control of the transition speed Va are the same as in the first embodiment. Therefore, the third embodiment also achieves the same effects as the first embodiment. In addition, in the third embodiment, the player can visually confirm the speed at which the light emission of the plurality of transition light emitting parts Eb changes (transition speed Va), and determine the time at which the operation of the first key K1 should be continued. (Continuation length L) can be understood.

D: Fourth Embodiment In the first to third embodiments, a mode is illustrated in which each of the plurality of transition light emitting parts Eb is caused to emit light in order in the direction from the first key K1 to the second key K2. In the fourth embodiment, the light emitting characteristics of one light emitting section E (hereinafter referred to as "target light emitting section E") corresponding to the key K to be operated next by the performer (hereinafter referred to as "target key K") are measured over time. to change. The luminescent property is the luminescent color or the luminescent intensity. The target light emitting section E in the fourth embodiment corresponds to the second light emitting section Ea2 in the first to third embodiments.

Note that the configuration of the performance system 100 is the same as that of the first embodiment. The control of the plurality of transition light emitting units Eb illustrated in the first to third embodiments is omitted in the fourth embodiment. However, the control of the transition light emitting section Eb in the first to third embodiments may also be applied to the fourth embodiment.

FIG. 7 is an explanatory diagram of the operation of the guidance control section 512 in the fourth embodiment. The target time tc on the time axis in FIG. 7 is the time when the player should operate the target key K. Specifically, the target time tc is the start point (note-on) of the sound generation period specified by the music data M for the note corresponding to the target key K.

The guide control unit 512 changes the light emission characteristics of the target light emission unit E over time within the control period C. Specifically, the guide control section 512 causes the target light emitting section E to emit light at the starting point ta of the control period C, and turns off the target light emitting section E at the end point tb of the control period C. The control period C is a period corresponding to the target time tc. Specifically, the control period C is a period that includes the target time tc. The control period C is divided into a first period Q1 and a second period Q2 with the target time tc as a boundary.

The first period Q1 is a period before the target time tc. Specifically, the first period Q1 is a period from a time point ta, which is a predetermined time (for example, 1 second) past the target time point tc, to the target time point tc. On the other hand, the second period Q2 is a period after the target time tc. Specifically, the second period Q2 is a period from the target time tc to the time tb at which a predetermined time has elapsed.

The guide control unit 512 changes the emission color of the target light emitting unit E over time in the first period Q1. Specifically, during the first period Q1, the guide control section 512 continuously changes the emission color of the target light emitting section E from the first color to the second color. The emitted color in the process from the first color to the second color is arbitrary.

Furthermore, in the second period Q2, the guide control section 512 causes the target light emitting section E to emit light in the third color. The third color is any luminescent color. It does not matter whether the third color is different from the first color or the second color. During the second period Q2, the light emission intensity of the target light emitting section E is constant. For example, the light emission intensity of the target light emitting section E during the second period Q2 is lower than the light emission intensity of the target light emitting section E during the first period Q1.

Note that in FIG. 7, changes in the light emission characteristics of the target light emitting section E when the player does not operate the target key K are illustrated for convenience. When the player operates the target key K at any time within the control period C, the guide control section 512 turns off the target light emitting section E at that time. That is, when the target key K is operated in the first period Q1 or the second period Q2, the target light emitting section E is turned off regardless of the light emission characteristics of the target light emitting section E at that time.

FIG. 8 is a flowchart of performance guidance processing in the fourth embodiment. Performance guidance processing is performed for each of the plurality of keys K sequentially or in parallel. As in the first embodiment, the guidance control unit 512 is realized by the control device 51 executing performance guidance processing.

The control device 51 waits until time ta, the start of the control period C, arrives for a specific key K (target key K) among the plurality of keys K (Sb1: NO). When the time point ta has arrived (Sb1: YES), the control device 51 changes the light emission characteristics of the target light emitting section E over time (Sb2) until the target time point tc has arrived (Sb3: NO). Specifically, the emitted light color of the target light emitting section E changes over time from the first color to the second color.

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

As described above, in the fourth embodiment, the target key K to be operated by the player is guided by changing the light emission of each of the plurality of light emitting sections E over time. Therefore, compared to a configuration in which only the light emission/extinguishing of the light emitting section E corresponding to the key K to be operated by the player is controlled, the player's operation of a plurality of keys can be effectively guided.

Particularly in the fourth embodiment, the emitted light color of the target light emitting part E corresponding to the target key K to be operated by the player among the plurality of light emitting parts E changes over time. Therefore, compared to a configuration in which the light emission/extinguishing of the light emitting section E corresponding to the key K to be operated by the player is only controlled in a binary manner, the player's operation of a plurality of keys K is effectively guided. can.

FIG. 9 is an explanatory diagram of a case where two operations occur at short intervals for one key K. Case 1 in FIG. 9 is a case where the control period C1 corresponding to the target key K starts from time ta1. Case 2 in FIG. 9 is a case where the control period C1 corresponding to the target key K starts from time ta2. Time ta2 is a time after time ta1.

Case 3 in FIG. 9 is a case where two notes (the first note and the second note) corresponding to the target key K are placed one after the other at a short interval. Specifically, in case 3, the control period C1 of the first note corresponding to the target key K starts from time ta1, and the control period C2 of the second note corresponding to the target key K starts from time ta2. Start. Specifically, a case is assumed in which the start time ta2 of the control period C2 corresponding to the second note is 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.

As illustrated in FIG. 9, it is assumed that the performer operates the target key K at time tx to play the first note. The time point tx is a time point within a period in which the control period C1 and the control period C2 mutually overlap. In the above state, in a form in which the light emission characteristics of the target light emitting section E change from the light emitting state of Case 1 to the light emitting state of Case 2 at time tx (hereinafter referred to as "comparative example"), the target light emitting section E changes before and after time tx. E's light emission continues without interruption. That is, the player cannot visually recognize that the target light emitting section E is turned off by operating the target key K. Therefore, the player may not be able to clearly recognize the light emission from the target light emitting section E corresponding to the second note.

Taking the above circumstances into consideration, the guidance control unit 512 of the fourth embodiment turns off the target light emitting unit E at the time tx of the operation by the player, and a predetermined period of time (hereinafter referred to as “light-off period”) δ has elapsed. The target light emitting section E is kept turned off until time ty. The light-off period δ is, for example, a period of about 100 milliseconds.

Then, at the end point ty of the light-off period δ, the guide control section 512 starts emitting light from the target light emitting section E corresponding to the control period C2. Specifically, the guide control unit 512 controls the light emission operation after time ty on the time axis, assuming that control of the light emission characteristics of the target light emission unit E is started from the starting point ta2 of the control period C2 (case 2). The target light emitting unit E is caused to execute at the time ty. That is, the target light emitting section E starts emitting light from time ty.

As can be understood from the above explanation, when the player operates the target key K at the time tx during which the control period C1 for the first note and the control period C2 for the second note mutually overlap, the guide control unit 512 turns off the target light emitting unit E during the turn off period δ from time tx to time ty. Then, the guide control unit 512 sets the light emitting state at time ty as an initial state, assuming that the light emission characteristics of the target light emitting part E are changed over time from the starting point ta1 of the control period C2, and from time ty to the target light emitting part E. to emit light.

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

Note that, similarly to the second embodiment or the third embodiment, the speed at which the light emitting characteristics of the target light emitting section E changes over time (hereinafter referred to as "change speed") Vb is determined by the performance speed T of the music or the duration of the musical note. It may be controlled according to L. For example, the rate of change Vb within the first period Q1 of the control period C is controlled according to the performance speed T or the duration L.

Specifically, the guide control unit 512 sets the change speed Vb to a higher speed as the performance speed T is higher. For example, assume that the performance speed T can be set to a numerical value T1 and a numerical value T2 (T1>T2). The rate of change Vb1 when the performance speed T is set to the numerical value T1 exceeds the rate of change Vb2 when the performance speed T is set to the numerical value T2 (Vb1>Vb2).

Note that the change in the speed of change Vb with respect to the performance speed T may be a linear change or a curved change. Further, the numerical range of the performance speed T may include a range in which the change rate Vb does not change with respect to a change in the performance speed T.

Further, the guide control unit 512 sets the change speed Vb to a higher speed as the duration L of the note played by the player immediately before is shorter. For example, assume that the duration L can be set to a numerical value L1 and a numerical value L2 (L1 < L2). The rate of change Vb1 when the continuation length L of the immediately preceding note is the numerical value L1 exceeds the rate of change Vb2 when the continuation length L is the numerical value L2 (Va1>Va2).

Note that the change in the rate of change Vb with respect to the continuous length L may be a linear change or a curved change. Further, a range in which the rate of change Vb does not change with respect to a change in the duration L may be included in the numerical range of the duration L.

In the first to third embodiments, a mode in which the light emitting characteristics of the plurality of transitional light emitting parts Eb are changed over time in the direction from the first key K1 to the second key K2 has been illustrated. In the fourth embodiment, an example is given in which the light emission characteristics of the target light emitting section E corresponding to the target key K are changed over time. The guidance control unit 512 in the first to fourth embodiments guides the player to the key K to be operated by changing the light emission of one or more light emitting parts E out of the plurality of light emitting parts E over time. It is comprehensively expressed as an element that

E: Fifth Embodiment FIG. 10 is a block diagram illustrating the configuration of a performance system 100 in a 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 realized as a separate device from the keyboard instrument 10. For example, a general-purpose information processing device such as a smartphone, a tablet terminal, or a personal computer may be used as the control system 50.

Specifically, the control system 50 includes a communication device 54 in addition to the same elements as in the first embodiment (control device 51, storage device 52, operating device 53). On the other hand, the keyboard instrument 10 includes a communication device 60 in addition to the same elements as in the first embodiment. The communication device 54 and the communication device 60 can communicate with each other by wire or wirelessly.

The control device 51 of the control system 50 controls the operation of the keyboard instrument 10 by communicating with the keyboard instrument 10 via the communication device 54. The operations executed by the control system 50 (for example, performance guidance processing) and the operations of the keyboard instrument 10 executed in accordance with the control by the control system 50 are the same as in the first embodiment.

The same effects as in the first embodiment are achieved in the fifth embodiment as well. Although the fifth embodiment has been described above based on the first embodiment, the configuration of the fifth embodiment may be similarly applied to the second to fourth embodiments. Furthermore, the reproduction system 30 (the sound source device 31 and the sound emitting device 32) may be installed in a control system 50 separate from the keyboard instrument 10.

F: Sixth Embodiment FIG. 11 is a perspective view of a keyboard instrument 10 in a sixth embodiment. The keyboard instrument 10 of the sixth embodiment includes a keyboard lid 12 in addition to the same elements as the first embodiment. The keyboard lid 12 is a plate-like member installed in the housing 11 in an openable and closable state. The keyboard lid 12 rotates from one of the closed state and the open state to the other. The closed state is a state in which the keyboard lid 12 covers the keyboard 21. The open state is a state in which the keyboard 21 is exposed. The player plays the keyboard instrument 10 by moving the keyboard lid 12 from the closed state to the open state, and when the performance is finished, moves the keyboard lid 12 from the open state to the closed state.

FIG. 12 is a partial sectional view of the keyboard lid 12 in a cross section perpendicular to the X-axis. The guide device 40 of the sixth embodiment is installed on the keyboard lid 12. Specifically, a guide device 40 is installed on the inner surface 13 of the keyboard lid 12. The inner surface 13 of the keyboard lid 12 is a surface that faces the keyboard 21 in the closed state. A mounting groove 14 is formed along the lower side of the inner surface 13 of the keyboard lid 12 near the housing 11. The mounting groove 14 is a recess that extends linearly in the direction of the X-axis. The guide device 40 is accommodated in the mounting groove 14 .

The guide device 40 of the sixth embodiment is a structure in which a plurality of light emitting parts E are arranged on the surface of a long mounting board 42. A drive circuit 41 (not shown in FIG. 12) is also installed on the mounting board 42. The guide device 40 is installed on the keyboard lid 12 with the mounting board 42 in contact with the bottom surface of the mounting groove 14. Therefore, the plurality of light emitting parts E are arranged in the X-axis direction along the lower side of the keyboard lid 12 in the vicinity of the keyboard 21.

As understood from FIG. 12, 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 part E does not protrude from the inner surface 13 of the keyboard lid 12. That is, the guide device 40 is housed within the step between the inner surface 13 of the keyboard lid 12 and the bottom surface of the mounting groove 14 . Note that the thickness H of the guide device 40 is the total value of the thickness of the mounting board 42 and the thickness of the light emitting part E.

The operation of the keyboard instrument 10 in the sixth embodiment is similar to that in the first embodiment. Therefore, the same effects as in the first embodiment are achieved in the sixth embodiment as well. Furthermore, in the sixth embodiment, a plurality of light emitting parts E are installed on the inner surface 13 of the keyboard lid 12. That is, in the closed state, the plurality of light emitting parts E are hidden in a state facing the keyboard 21. Therefore, compared to a configuration in which the plurality of light emitting parts E are always exposed on the exterior of the housing 11, there is an advantage that the appearance of the keyboard instrument 10 when not in use (that is, in the closed state) can be maintained.

Although the sixth embodiment has been described above based on the first embodiment, the configuration of the sixth embodiment may be similarly applied to the second to fifth embodiments.

G: Modification Examples Specific modifications added to each of the above-mentioned aspects are illustrated below. A plurality of aspects arbitrarily selected from each of the above-mentioned embodiments and the modified examples illustrated below may be combined as appropriate to the extent that they do not contradict each other.

(1) In the first to third embodiments, a plurality of light emitting parts E are provided between the first light emitting part Ea1 corresponding to the first key K1 and the second light emitting part Ea2 corresponding to the second key K2. Although the transition light emitting parts Eb are specified as targets of the transition guiding operation, the positions of the plurality of transition light emitting parts Eb are not limited to the above example. As other examples of the transition guidance operation, the following aspects are assumed. In the following example, it is assumed that the second key K2 is located in the X1 direction of the first key K1. When the second key K2 is located in the X2 direction of the first key K1, the light emission mode of each light emitting section E becomes a mode in which the left and right sides are reversed in the following example.

[Aspect 1]
The first light emitting section Ea1 and the second light emitting section Ea2 may be included in the plurality of transition light emitting sections Eb. For example, as illustrated in FIG. 13, the first light emitting section Ea1 may constitute one end of an array of a plurality of transition light emitting sections Eb, and the second light emitting section Ea2 may constitute the other end of the array. The transition guiding operation in the above configuration is an operation of causing each of the plurality of transition light emitting parts Eb from the first light emitting part Ea1 to the second light emitting part Ea2 to emit light in the third color in order.

[Aspect 2]
The light emitting part E at a point halfway between the first light emitting part Ea1 and the second light emitting part Ea2 may be used as the end point of the plurality of transition light emitting parts Eb to be subjected to the transition guiding operation. For example, in FIGS. 14 and 15, nine light emitting parts E from light emitting part E1 to light emitting part E9 are illustrated. The light emitting section E1 is the first light emitting section Ea1 corresponding to the first key K1, and the light emitting section E9 is the second light emitting section Ea2 corresponding to the second key K2.

As illustrated in FIG. 14, the transition guidance operation may be performed using the four light emitting parts E from the light emitting part E2 to the light emitting part E5 as the transition light emitting part Eb. That is, each transition light emitting part Eb from the light emitting part E2 to the light emitting part E5 sequentially emits light in the third color. The three light emitting parts E from the light emitting part E6 to the light emitting part E8 do not emit light. That is, in the form of FIG. 14, the light emitting part E5 at a point halfway between the first light emitting part Ea1 and the second light emitting part Ea2 is placed at the end near the second light emitting part Ea2 of the arrangement of the plurality of transition light emitting parts Eb. It is in the form of a section.

Further, as illustrated in FIG. 15, the transition guide operation may be performed using the four light emitting parts E from the light emitting part E5 to the light emitting part E8 as the transition light emitting part Eb. That is, each transitional light emitting section Eb from the light emitting section E5 to the light emitting section E8 sequentially emits light in the third color. The three light emitting parts E from the light emitting part E2 to the light emitting part E4 do not emit light. That is, in the form of FIG. 15, the light emitting part E5 located halfway between the first light emitting part Ea1 and the second light emitting part Ea2 is placed at the end near the first light emitting part Ea1 of the array of the plurality of transition light emitting parts Eb. It is in the form of a section.

[Aspect 3]
A light emitting part E located outside the range from the first light emitting part Ea1 to the second light emitting part Ea2 may be included in the plurality of transition light emitting parts Eb. For example, in FIGS. 16 and 17, nine light emitting parts E from light emitting part E1 to light emitting part E9 are illustrated. The light emitting section E3 is the first light emitting section Ea1 corresponding to the first key K1, and the light emitting section E7 is the second light emitting section Ea2 corresponding to the second key K2.

As illustrated in FIG. 16, the transition guidance operation may be performed using the six light emitting parts E from the light emitting part E4 to the light emitting part E9 adjacent to the first light emitting part Ea1 as the transition light emitting part Eb. Each transition light emitting section Eb from the light emitting section E4 to the light emitting section E9 sequentially emits light in the third color. The light emitting part E9 is located further in the X1 direction than the second light emitting part Ea2. That is, the configuration shown in FIG. 16 is a configuration in which light emission of the third color passes through the second light emitting portion Ea2.

Further, as illustrated in FIG. 17, the transition guide operation may be performed using the six light emitting parts E from the light emitting part E1 to the light emitting part E6 as the transition light emitting part Eb. Each transitional light emitting section Eb from the light emitting section E1 to the light emitting section E6 sequentially emits light in the third color. The light emitting section E1 is located further in the X2 direction than the first light emitting section Ea1. That is, the configuration shown in FIG. 17 is a configuration in which light emission of the third color passes through the first light emitting portion Ea1.

[Aspect 4]
In the above example, a plurality of transition light emitting parts Eb are specified according to the first light emitting part Ea1 and the second light emitting part Ea2, but the first light emitting part Ea1 and the second light emitting part Ea2, The relationship between the transition light emitting portion Eb and the transition light emitting portion Eb is arbitrary. That is, a plurality of transition light emitting parts Eb may be specified regardless of the positions of the first key K1 and the second key K2.

For example, in an arrangement of a plurality of light emitting parts E, a predetermined number of light emitting parts E including the ends in the X2 direction may be used as a plurality of transition light emitting parts Eb to perform the transition guidance operation. That is, each of the plurality of transition light emitting parts Eb corresponding to the ends in the X2 direction of the keyboard 21 sequentially emit light in the third color. Further, in the arrangement of the plurality of light emitting parts E, a predetermined number of light emitting parts E including the ends in the X1 direction may be used as a plurality of transition light emitting parts Eb to perform the transition guidance operation. That is, each of the plurality of transition light emitting parts Eb corresponding to the ends of the keyboard 21 in the X1 direction sequentially emit light in the third color.

[Aspect 5]
It is not necessary to use all the mutually adjacent light emitting parts E between the first light emitting part Ea1 and the second light emitting part Ea2 as the transition light emitting part Eb which is the target of the transition guiding operation. For example, FIG. 18 shows nine light emitting parts E from light emitting part E1 to light emitting part E9. The light emitting section E1 is the first light emitting section Ea1 corresponding to the first key K1, and the light emitting section E9 is the second light emitting section Ea2 corresponding to the second key K2.

Four light emitting parts E (E2, E4, E6, E8) selected every other one among the seven light emitting parts E2 to E8 located between the first light emitting part Ea1 and the second light emitting part Ea2 are A transition guidance operation may be performed as the transition light emitting unit Eb. That is, a part of the plurality of light emitting parts E located between the first light emitting part Ea1 and the second light emitting part Ea2 may be used for the transition guiding operation.

As understood from the examples of aspects 1 to 5, the guide control section 512 causes each of the plurality of transition light emitting sections Eb to sequentially emit light in the direction from the first key K1 to the second key K2. The positions of the plural transition light emitting parts Eb with respect to the keyboard 21, the positions of the plural transition light emitting parts Eb with respect to the first light emitting part Ea1 and the second light emitting part Ea2, or the positions of the plural transition light emitting parts Eb with respect to the first light emitting part Ea1 and the second light emitting part Ea2. Matters such as whether it is included in the light emitting section Eb are arbitrary in the present disclosure.

(2) In each of the above embodiments, the light emitting part E corresponding to one first key K1 was exemplified as the first light emitting part Ea1, but for example, when playing a chord, the performer operates multiple keys K in parallel. There are cases where The guide control section 512 may select, as the first light emitting section Ea1, a light emitting section E corresponding to a combination of a plurality of keys K played in parallel by the player.

For example, a light emitting unit E corresponding to one key K representing a plurality of keys K (hereinafter referred to as “representative key K”) may be selected as the first light emitting unit Ea1. The representative key K is a key K corresponding to a representative value of a plurality of pitches played in parallel by a performer. The representative value is, for example, the median value of a plurality of pitches. For example, when a performer plays "C", "E", and "G" in parallel, the guidance control unit 512 selects the key K with the representative value "Mi" as the representative key K, and selects the key K corresponding to the representative key K. The light emitting section E is specified as the first light emitting section Ea1. In the above embodiment, the representative key K may be interpreted as the first key K1, or each of the plurality of keys K played in parallel by the player may be interpreted as the first key K1.

Similarly, the guide control section 512 may select the light emitting section E corresponding to the combination of the plurality of keys K to be played in parallel by the player as the second light emitting section Ea2 corresponding to the second key K2. For example, the light emitting section E corresponding to the representative key K of the plurality of keys K may be selected as the second light emitting section Ea2. In the above embodiment, the representative key K may be interpreted as the second key K2, or each of the plurality of keys K played in parallel by the player may be interpreted as the second key K2.

(3) The emitted light color of each light emitting part E is not limited to the examples of each form described above. 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 emit light in different colors (hues). The first light emitting section Ea1, the second light emitting section Ea2, and each transition light emitting section Eb may emit light in the same color. That is, in the first to third embodiments, the first color, second color, and third color may be the same color or different colors.

The emitted light color of each light emitting part E may be made different depending on the finger used to operate each key K. For example, assume that the music data M specifies the fingering within the music. That is, the music data M specifies the finger number to be used to play each note in the music. The guide control unit 512 causes the first light emitting portion Ea1 to emit light in a color corresponding to the finger that operates the first key K1, and causes the second light emitting portion Ea2 to emit light in a color corresponding to the finger that operates the second key K2. to emit light. Further, the guide control unit 512 causes each transition light emitting unit Eb to emit light in a light emitting color depending on the finger that operates the first key K1 or the second key K2.

Furthermore, the light emission color of the light emitting section E may be made different between black keys and white keys. For example, the guide control unit 512 causes the first light emitting unit Ea1 to emit light in different colors depending on whether the first key K1 is a black key or a white key. The guide control section 512 makes the emitted light color of the second light emitting section Ea2 different depending on whether the second key K2 is a black key or a white key. Further, the guide control unit 512 makes the emitted light color of each transition light emitting unit Eb different depending on whether the first key K1 or the second key K2 is a black key or a white key.

(4) In the first to third embodiments, the first light emitting part Ea1 and the second light emitting part Ea2 emit light in different colors, but the light emitting characteristics other than the light emitting color are different from those of the first light emitting part Ea1. and the second light emitting portion Ea2 may be different. For example, the intensity of light emitted by the light emitting section E (light emission intensity) or the light emission pattern of the light emitting section E may be different between the first light emitting section Ea1 and the second light emitting section Ea2. The light emitting pattern is, for example, a mode in which the light emitting section E blinks. For example, the period of blinking or the temporal ratio of light emission and extinguishment is exemplified as the light emission pattern.

Further, in each of the above-described embodiments, 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 emitting colors, but the light emitting characteristics other than the light emitting color are different from those of the first light emitting section. Ea1 or the second light emitting part Ea2 and each transition light emitting part Eb may be different. 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.

As understood from the above explanation, the "emission characteristics" are comprehensively expressed as any characteristics related to light emission of the light emitting section E. For example, characteristics such as emitted light color, emitted light intensity, and emitted light pattern are examples of "emitted light characteristics."

(5) In the first to third embodiments, examples are given of forms in which the player is guided through the transition between the first key K1 that the player is operating and the second key K2 that is to be operated next. However, it is also conceivable that the player is further guided through the transitions for each key K to be operated after the second key K2.

For example, FIG. 19 illustrates a third key K3 that the player should operate next to the second key K2. The guide control section 512 causes the third light emitting section Ea3 corresponding to the third key K3 to emit light in the fourth color. The fourth color is a luminescent color different from the first to third colors. Further, the guide control unit 512 causes each transition light emitting unit Eb between the first key K1 and the second key K2 to emit light in order, and also causes each transition light emitting unit Eb between the second key K2 and the third key K3 to emit light in order. Eb is made to emit light in order in the direction toward the third key K3. It does not matter whether the emitted light color of each transition light emitting part Eb between the first key K1 and the second key K2 is different from the emitted light color of each transition light emitting part Eb between the second key K2 and the third key K3. be.

Note that in the above explanation, three keys K (K1 to K3) are illustrated for convenience, but the number of keys K guided to the player is arbitrary. For example, the guide control unit 512 may guide the performer to a plurality of keys K corresponding to notes within a specific section of the song by emitting light from the light emitting unit E corresponding to each key K. The section to be guided is, for example, a section corresponding to a predetermined number of bars of the song.

(6) In the first to third embodiments, the transition guidance operation is repeated, but the transition guidance operation may be performed only once. One transition guiding operation is, for example, an operation of causing each of the plurality of transition light emitting sections Eb to emit light once in a specific direction. That is, the guidance control unit 512 may perform one transition guidance operation for each selection of the second key K2.

(7) In the first to third embodiments, a mode in which each of the plurality of transition light emitting parts Eb is selectively emitted is illustrated, but a plurality of The transition light emitting parts Eb may be made to sequentially emit light. For example, referring to FIG. 4, the guide control unit 512 causes the light emitting parts E3 and E4 to emit light at time t2, causes the light emitting parts E4 and E5 to emit light at time t3, and causes the light emitting parts E5 to emit light at time t4. and the light emitting section E6 to emit light. Note that the two or more light emitting parts E that emit light at each time do not have to overlap with each other. For example, the guide control section 512 may cause the light emitting sections E3 and E4 to emit light at time t2, and may cause the light emitting sections E5 and E6 to emit light at time t3.

(8) In the first to third embodiments, it is difficult for the performer operating the first key K1 to recognize the light emission of the second light emitting section Ea2 corresponding to the second key K2. K1 and second key K2 are in a state where they are sufficiently separated. Considering the above circumstances, it is preferable to have a configuration in which the guidance control unit 512 executes the transition guidance operation when the pitch difference between the first key K1 and the second key K2 exceeds a predetermined threshold. If the pitch difference is less than the threshold, the guidance control unit 512 does not perform the transition guidance operation. According to the above embodiment, there is an advantage that light emission by the plurality of light emitting sections E is simplified.

(9) In each of the above-mentioned embodiments, each time the performer operates a key K, the next key K is guided. Not limited to examples.

For example, the control device 51 (guidance control unit 512) may advance the guidance of the music performance in conjunction with the progression of the position where the performer is playing within the music (hereinafter referred to as the "performance position"). For example, in the fourth embodiment, when the performance position reaches a point a predetermined time before the starting point of each note in the song, the control device 51 controls the control period C (first period Q1) starts. According to the above embodiment, it is possible to guide the operation of each note at an appropriate timing linked to the performance of the performer. Note that a known performance analysis technique (score alignment technique), such as the technique disclosed in Japanese Patent Application Laid-open No. 2016-099512, may be arbitrarily employed to analyze the performance position.

(10) In the first to third embodiments, a mode in which each of the plurality of transition light emitting parts Eb is made to emit light in sequence is illustrated, but the player is guided in the direction of the second key K2 with respect to the first key K1. The method for doing so is not limited to the above examples. For example, the guide control unit 512 may turn off each transition light emitting unit Eb in order in the direction from the first key K1 to the second key K2 in a state where the plurality of transition light emitting units Eb are emitted. That is, the state in which each transitional light emitting section Eb turns off changes over time to each of the plurality of transitional light emitting sections Eb.

In addition, the guide control unit 512 changes the light emitting color of each transition light emitting part Eb in the direction from the first key K1 to the second key K2 in a state where the plurality of transition light emitting parts Eb emit light with a specific light emitting color. You can. That is, the state in which the emitted light color of each transitional light emitting section Eb changes changes over time to each of the plurality of transitional light emitting sections Eb.

Even in the above embodiment, it is possible to guide the player in the direction of the second key K2. As understood from the above example, the guide control section 512 is comprehensively expressed as an element that changes the light emission of the plurality of transition light emitting sections Eb over time. "Change in luminescence over time" includes a change from one of luminescence and extinguishment to the other, and a change in luminescence characteristics such as luminescence color.

(11) A video showing the performance of a song may be played in conjunction with the performance of the keyboard instrument 10 by the performer. FIG. 20 is a block diagram of a performance system 100 according to a modified example. Similar to the fifth embodiment, the performance system 100 includes a keyboard instrument 10 and a control system 50 that are configured separately from each other. However, the control system 50 may be installed in the keyboard instrument 10. Note that the operation of guiding the player to play using the guiding device 40 of the keyboard instrument 10 is the same as in each of the above-described embodiments.

The storage device 52 of the control system 50 stores the moving image data Z of the song. The video data Z is data representing a video regarding the performance of a song. The video represented by the video data Z represents how a song is played by a musical instrument of a different type than the keyboard instrument 10 (hereinafter referred to as an "auxiliary instrument"). Further, the moving image represented by the moving image data Z includes musical sounds of an auxiliary instrument. The musical sound represented by the video data Z is a performance sound produced by an auxiliary musical instrument during the performance of a musical piece.

The auxiliary instrument is, for example, an instrument other than the keyboard instrument 10 among a plurality of types of instruments corresponding to different performance parts of a song. For example, the keyboard instrument 10 corresponds to the performance part of the main melody of a song, and the auxiliary instrument is an instrument such as a stringed instrument that corresponds to the performance part of the accompaniment sound of the song. For example, video data Z is generated by recording a player who is proficient in playing an auxiliary instrument playing a piece of music using the auxiliary instrument.

The control system 50 includes a display device 55 and a sound emitting device 56 in addition to the same elements as in each of the above-described embodiments (control device 51, storage device 52, operating device 53, communication device 54). The display device 55 and the sound emitting device 56 are used as playback devices for playing back the video data Z.

The display device 55 displays the moving image represented by the moving image data Z under 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 emitting device 56 emits musical sounds represented by the moving image data Z under the control of the control device 51. The sound emitting device 56 is, for example, a speaker. Note that a display device 55 or a sound emitting device 56 configured separately from the control system 50 may be connected to the control system 50 by wire or wirelessly.

The control device 51 of the control system 50 advances the reproduction of the video data Z in conjunction with the performance of the keyboard instrument 10 by the player. The control device 51 can cause the display device 55 and the sound emitting device 56 to reproduce an arbitrary position (hereinafter referred to as a "playback position") in the video represented by the video 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 video data Z so as to be linked to the performance position. Specifically, the display device 55 and the sound emitting device 56 play back a video in which the auxiliary instrument plays a portion of the song that corresponds to the performance position. Therefore, the player can play the keyboard instrument 10 according to the guidance provided by the guide device 40, as if playing in concert with the auxiliary instrument.

Note that a plurality of display devices 55 may be used to reproduce the video data Z. For example, each of the plurality of display devices 55 may display videos related to different types of auxiliary instruments. Similarly, musical tones corresponding to each of a plurality of types of auxiliary instruments may be emitted by a plurality of different sound emitting devices 56.

(12) As mentioned above, the playback system 30 may be configured as a separate device from the keyboard instrument 10. FIG. 21 is a block diagram of a performance system 100 in a modified example in which the reproduction system 30 is configured separately from the keyboard instrument 10. The playback system 30 in FIG. 21 is an automatic musical instrument that includes a communication device 35, a sounding mechanism 36, and a drive device 37. For example, a player piano is used as the playback system 30. Although FIG. 21 shows an example in which the reproduction system 30 is omitted from the keyboard instrument 10, the sound source device 31 and the sound emitting device 32 may be installed in the keyboard instrument 10.

The communication device 35 communicates with the communication device 54 of the control system 50 by wire or wirelessly. Control system 50 sends performance instructions to playback system 30 . The performance instruction is, for example, data that instructs the player to produce a tone corresponding to the key K operated by the player. For example, MIDI-compliant event data is exemplified as the performance instruction. Note that the control system 50 may transmit an instruction to play notes corresponding to a performance part other than the keyboard instrument 10 among the plurality of performance parts of the music piece. For example, the control system 50 transmits an instruction to play a note corresponding to the performance position of the player of the keyboard instrument 10, among a plurality of notes constituting a performance part other than the keyboard instrument 10. The communication device 35 receives performance instructions transmitted from the control system 50.

The sounding mechanism 36 is constructed from a combination of a plurality of members, and produces one of a plurality of musical tones through mechanical movement of each member. The sound generating mechanism 36 is, for example, a string-striking mechanism that strikes a plurality of strings corresponding to different pitches. The driving device 37 drives the sounding mechanism 36 in response to a performance instruction received by the communication device 35 from the control system 50 . That is, the driving device 37 drives the sounding mechanism 36 so that the musical tone specified by the performance instruction is produced. According to the above embodiment, the reproduction system 30 produces musical tones corresponding to the performance of the keyboard instrument 10 by the player.

(13) In each of the above-mentioned embodiments, the keys K and the light-emitting parts E are exemplified in one-to-one correspondence, but the correspondence between each key K and each light-emitting part E is not limited to the above examples. Specifically, a configuration in which the number of light emitting parts E exceeds the number of keys K is also assumed. For example, in addition to installing one light emitting part E near each key K, one light emitting part E may also be installed between two keys K that are adjacent to each other. According to the configuration in which the number of light emitting parts E exceeds the number of keys K, it is possible to continuously change the light emission of each light emitting part E.

(14) In the first to third embodiments, the light emission of each of the plurality of transition light emitting parts Eb is changed over time, but in order to guide the player in the direction of the second key K2, The method is not limited to the method using the light emitting section E. For example, aspects 1 to 3 illustrated below are assumed.

[Aspect 1]
The direction of the second key K2 relative to the first key K1 may be guided to the player by using a projected image by a projection type display device (projector). For example, a 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 display device so that the guide image changes in the direction from the first key K1 to the second key K2. With the above embodiment as well, the player who visually recognizes the guide image can visually grasp the direction of the second key K2 to be operated immediately.

[Aspect 2]
The direction of the second key K2 relative to the first key K1 may be guided to the player using a display image on a direct-view display device. For example, a long display device is installed along the keyboard 21 in the direction of the X axis. The display device is composed of, for example, a liquid crystal panel or an organic EL (Electroluminescence) panel. The display device displays a guide image. The display device is controlled so that the guide image changes in the direction from the first key K1 to the second key K2. With the above embodiment as well, the player who visually recognizes the guide image can visually grasp the direction of the second key K2 to be operated immediately.

[Aspect 3]
The direction of the second key K2 relative to the first key K1 may be guided to the player using a display image on a display device (HMD: Head Mounted Display) mounted on the user's head. The HMD displays a guide image that changes over time in a direction from the first key K1 to the second key K2, superimposed on the keyboard instrument 10 that is visually recognized by the player. For example, a transmissive HMD that allows the performer to view the real space as the background of the guide image, or a non-transparent HMD that superimposes the guide image on an image of the keyboard instrument 10 captured by an imaging device is used. That is, the HMD displays a guide image using augmented reality (AR) or mixed reality (MR).

Note that in Aspects 1 to 3, it is assumed that a guide image is displayed to guide the direction of the second key K2 with respect to the first key K1 (first to third embodiments). Aspects 1 to 3 may also be applied to the fourth embodiment that guides. Specifically, a guide image guiding the target key K is displayed by the display devices of aspects 1 to 3.

As can be understood from the above description, one aspect of the present disclosure includes an element (performance guide section) that presents the user with a guide display that changes over time in the direction from the first key K1 to the second key K2; It is comprehensively expressed as a configuration comprising the following. Focusing on the configurations of the first to third embodiments, the performance guide section is composed of a guide control section 512 and a plurality of light emitting sections E, and the guide display is realized by light emission from the plurality of light emitting sections E. . Furthermore, in the first aspect in which a projection type display device is used, the performance guide section is configured by a projection type display device and a guide control section 512. In the second embodiment in which a direct-view display device is used, the performance guide section is configured by a direct-view display device and a guide control section 512. In a mode in which a display device is used, the guidance display is realized by an image displayed by the display device.

(15) In the fourth embodiment, a mode in which the emitted light color of the target light emitting unit E is changed over time in the first period Q1 of the control period C is exemplified, but the light emitting characteristics that change over time in the first period Q1 are illustrated. is not limited to the emitted color. For example, the guide control unit 512 may change the light emission intensity of the target light emitting unit E over time during the first period Q1. Further, the guide control unit 512 may change the light emission pattern (for example, blinking cycle) of the target light emission unit E over time during the first period Q1.

Furthermore, in the fourth embodiment, a mode in which the target light emitting section E emits light in the third color in the second period Q2 of the control period C is illustrated, but the manner in which the target light emitting section E emits light in the second period Q2 is as described above. The invention is not limited to this example. For example, the guide control section 512 may change the emission color or emission intensity of the target light emission section E over time during the second period Q2. Further, the guide control unit 512 may change the light emission pattern (for example, blinking cycle) of the target light emission unit E over time during the second period Q2.

As understood from the above description, the guidance control section 512 in the fourth embodiment is comprehensively expressed as an element that changes the light emission characteristics of the target light emission section E over time. As described above, the "emission characteristics" are any characteristics related to light emission from the light emitting section E. For example, characteristics such as emitted light color, emitted light intensity, and emitted light pattern are examples of "emitted light characteristics."

(16) In the fourth embodiment, the first period Q1 of the control period C may have a 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 control change or velocity value in the music data M. Further, it is assumed that the time length of the first period Q1 is set according to the performance speed T of the music. Specifically, the control device 51 sets the first period Q1 to a shorter time length as the performance speed T becomes faster.

It is also conceivable that the time length of the first period Q1 is set according to the interval between successive beat points in a song (hereinafter referred to as "beat cycle"). For example, the control device 51 (guidance control unit 512) estimates the beat of a song by analyzing the performance of the keyboard instrument 10 by the performer. Then, the control device 51 (guidance control unit 512) sets the time length of the first period Q1 to, for example, an integral multiple of the beat cycle. According to the above embodiment, the first period Q1 during which each light emitting section E continues to emit light is controlled to be short in a part of the song where the interval between successive notes is short. Therefore, the number of light emitting parts E that emit light in parallel to each other is reduced, and as a result, the burden on the performer in checking the guidance can be reduced.

Although the above explanation focuses on the time length of the first period Q1 for convenience, the time length of the control period C or the second period Q2 may be similarly variable. To control the time length of the control period C or the second period Q2, the same method as described above for controlling the time length of the first period Q1 is adopted.

(17) In the fourth embodiment, the time point at which the player should operate the target key K was illustrated as the target time point tc, but the time point at which the target key K should be operated and the light emission of the target light emitting section E are controlled. The relationship with the control period C is not limited to the above example. For example, the control period C may start from the point in time when the target key K is to be operated. The control period C may end at the time when the target key K is to be operated. Further, in the fourth embodiment, the control period C includes 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 section E may be continuously controlled from the start point to the end point of the control period C.

(18) In the sixth embodiment, the mounting board 42 on which the plurality of light emitting parts E is mounted is installed on the keyboard lid 12, but the plurality of light emitting parts E are directly mounted on the keyboard lid 12. may be installed. For example, the light emitting section E may be accommodated in each of a plurality of attachment holes installed in the inner surface 13 of the keyboard lid 12. That is, the mounting board 42 may be omitted.

(19) The position where the guide device 40 is installed is not limited to the examples in each of the above embodiments. For example, in a configuration in which each key K is formed of a light-transmitting material, a light emitting section E corresponding to each key K may be installed inside the key K. That is, the guide device 40 may be mounted on the keyboard unit 20.

(20) In the sixth embodiment in which the guide device 40 is installed on the keyboard lid 12, a wireless power supply device that wirelessly supplies power to the guide device 40 may be installed in the housing 11. For wireless power feeding to the guide device 40, any power feeding method such as an electromagnetic induction method, a magnetic resonance method, an electric field coupling method, or an electromagnetic wave method is adopted.

Wireless power supply to the guide device 40 may be started in conjunction with the displacement of the keyboard lid 12. For example, a sensor that detects opening and closing of the keyboard lid 12 is installed in the keyboard instrument 10. The wireless power supply device starts wireless power supply to the guide device 40 when the keyboard lid 12 changes from the closed state to the open state. Further, the wireless power supply device stops wireless power supply to the guide device 40 when the keyboard lid 12 transitions from the open state to the closed state. According to the above embodiment, power consumption can be reduced compared to the embodiment in which power is supplied to the guide device 40 regardless of the state of the keyboard lid 12.

(21) In parallel to the operations exemplified in each of the above-described embodiments, the approximate positions at which the player should place his right and left hands may be guided to the player by emitting light from a plurality of light emitting sections E. For example, the guidance control unit 512 causes the light emitting parts E corresponding to the positions of the right hand and left hand of the performer to emit light in a different color from the light emitting parts E (Ea1, Ea2, Eb) in the above-mentioned performance guidance process. .

(22) In each of the above embodiments, an electronic musical instrument equipped with a sound source device 31 that generates an acoustic signal is exemplified as the keyboard instrument 10, but the present disclosure is also applied to a natural musical instrument that is not equipped with a sound source device 31. For example, the present disclosure is also applicable to a keyboard instrument that includes a sound generation mechanism that generates sound in conjunction with the operation of each key K. The sound generating mechanism is, for example, a string-striking mechanism that strikes a string in conjunction with the displacement of the key K. Note that the keyboard instrument 10 may have both the sound source device 31 and a sound generation mechanism.

(23) As described above, the functions of the control system 50 according to each of the above embodiments are realized by cooperation between one or more processors that constitute the control device 51 and a program stored in the storage device 52. The programs exemplified above may be provided in a form stored in a computer-readable recording medium and installed on a computer. The recording medium is, for example, a non-transitory recording medium, and an optical recording medium (optical disk) such as a CD-ROM is a good example, but any known recording medium such as a semiconductor recording medium or a magnetic recording medium is used. Also included are recording media in the form of. Note that the non-transitory recording medium includes any recording medium excluding transitory, propagating signals, and does not exclude volatile recording media. Furthermore, in a configuration in which a distribution device distributes a program via a communication network, a recording medium that stores a program in the distribution device corresponds to the above-mentioned non-transitory recording medium.

H: Supplementary Note From the forms exemplified above, for example, the following configurations can be understood.

A performance system according to one aspect (aspect 1) of the present disclosure includes a plurality of keys, a plurality of light emitting sections arranged along the plurality of keys, and one or more light emitting sections among the plurality of light emitting sections. The apparatus further includes a guide control section that guides the key to be operated among the plurality of keys by changing the light emission over time. In the above aspect, the key to be operated among the plurality of keys is guided by changing the light emission from one or more of the plurality of light emitting parts over time. Therefore, compared to a configuration in which only the light emission/extinguishing of the light emitting section corresponding to the key to be operated by the player is controlled, it is possible to effectively guide the player's operation of a plurality of keys.

Note that in a state where the first key to be operated at a certain point and the second key to be operated immediately after are sufficiently separated, the user operates the first key and then operates the second key. In some cases, it may not be possible to quickly determine the light emission from the light emitting section. In consideration of the above circumstances, in a specific example of aspect 1 (aspect 2), the guidance control unit selects a second key to be operated next to the first key from among the plurality of keys. Light emission from two or more of the plurality of light emitting parts is changed over time in a direction toward the key. In the above aspect, the light emission of the two or more light emitting parts changes over time in the direction from the first key to the second key. The player 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 to, for example, a configuration in which only one light-emitting part corresponding to the key to be operated out of a plurality of light-emitting parts emits light, it is possible to guide the performance by the player more effectively. For example, if 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 section corresponding to the second key after operating the first key. be. According to the present disclosure, since the direction in which the player should move his or her fingers in order to operate the second key is guided, the player can easily grasp the second key.

In a specific example of Aspect 2 (Aspect 3), the two or more light emitting units include a first light emitting unit corresponding to the first key and a second light emitting unit corresponding to the second key, among the plurality of light emitting units. including the light emitting part between the According to the above aspect, two or more light emitting parts including 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 to be operated next to the first key. Regarding the light emitting part, the light emission changes over time. Therefore, compared to a configuration in which the light emission of two or more selected light emitting parts is controlled independently of the first light emitting part and the second light emitting part, the player can operate the second key after the first key. It is easy to visually and intuitively grasp the direction and distance to which one's fingers should be moved in order to achieve the goal. Note that the two or more light emitting sections may include a first light emitting section or a second light emitting section.

In a specific example of Aspect 2 or Aspect 3 (Aspect 4), the guide control section causes each of the two or more light emitting sections to sequentially emit light in a direction from the first key toward the second key. According to the above aspect, by visually observing how each of the two or more light emitting parts emit light in sequence, the performer can visually and visually determine the direction in which his or her fingers should be moved in order to operate the second key. It can be grasped intuitively.

In the specific example of any one of aspects 2 to 4 (aspect 5), the guide control unit causes the second light emitting unit to emit light after performing an operation of changing the light emission of the two or more light emitting units over time. . According to the aspect described above, by visually checking how each of the two or more light emitting parts sequentially emit light, the performer can grasp the direction in which to move his or her fingers, and also can control the light emission of the second light emitting part. By visually checking the position of the second key to be operated immediately after, it is possible to accurately grasp the position of the second key.

In a specific example of any one of aspects 2 to 5 (aspect 6), the guide control section repeats an operation of changing the light emission of the two or more light emitting sections over time. In the above aspect, the operation of changing the light emission of the two or more light emitting parts over time in the direction from the first key to the second key is repeated multiple times. Therefore, the player can reliably and easily grasp the direction and distance to which his or her fingers should be moved in order to operate the second key.

In a specific example of any one of aspects 2 to 5 (aspect 7), the guide control section controls the speed at which the light emission of the two or more light emitting sections is changed over time in accordance with the performance speed of the music. According to the above aspect, the performer can roughly grasp the performance speed of the music piece by visually checking the speed at which the light emission of the two or more light emitting sections changes.

In a specific example of any one of Aspects 2 to 7 (Aspect 8), the guide control unit may adjust the speed at which the light emission of the two or more light emitting units is changed over time to the musical note corresponding to the first key in the music piece. control according to the duration of. According to the aspect described above, the player can grasp the length of time for which the operation of the first key should be continued by checking the speed at which the light emission of the two or more light emitting sections changes.

In a specific example of Aspect 1 (Aspect 9), the guide control section changes over time the light emitting characteristics of a light emitting section corresponding to a key to be operated among the plurality of light emitting sections. In the above aspect, the light emitting characteristics of the light emitting part corresponding to the key to be operated among the plurality of light emitting parts change over time. Therefore, compared to a configuration in which the light emission/extinguishing of the light emitting section corresponding to the key to be operated by the player is only controlled in a binary manner, it is possible to effectively guide the player to operate a plurality of keys.

A performance system according to another aspect (aspect 10) of the present disclosure includes a plurality of keys, and a direction from a first key of the plurality of keys to a second key to be operated next to the first key. and a performance guide section that presents the user with a guide display that changes over time. In the above aspect, the guide display changes over time in the direction from the first key to the second key. The player 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 to, for example, a configuration in which only one light emitting part corresponding to a key to be operated out of a plurality of light emitting parts emits light, it is possible to guide the performance by the player more effectively.

A control system according to one aspect (aspect 11) of the present disclosure is a system for controlling a keyboard instrument including a plurality of keys and a plurality of light emitting parts arranged along the plurality of keys, A music processing section that identifies a key to be operated among the plurality of keys, and a light emission by one or more of the plurality of light emitting sections are changed over time to determine which of the plurality of keys is to be operated. and a guide control unit that guides the user to the desired key.

A control method according to one aspect (aspect 12) of the present disclosure is a method for controlling a keyboard instrument including a plurality of keys and a plurality of light emitting parts arranged along the plurality of keys, the method comprising: The key to be operated among the plurality of keys is identified, and the light emission from one or more of the plurality of light emitting parts is changed over time, thereby determining the key to be operated among the plurality of keys. invite.

DESCRIPTION OF SYMBOLS 100... Performance system, 10... Keyboard instrument, 11... Housing, 12... Keyboard lid, 13... Inner surface, 14... Mounting groove, 20... Keyboard unit, 21... Keyboard, 22... Detection device, K... Key, 30... Playback System, 31... Sound source device, 32... Sound emitting device, 35... Communication device, 36... Sound generating mechanism, 37... Drive device, 40... Guide device, E... Light emitting section, 41... Drive circuit, 42... Mounting board, 50... Control system, 51...Control device, 511...Music processing unit, 512...Guidance control unit, 52...Storage device, 53...Operation device, 54...Communication device, 55...Display device, 56...Sound emitting device, 60...Communication device .

Claims

multiple keys,
a plurality of light emitting parts arranged along the plurality of keys;
A performance system comprising: a guidance control section that guides a key to be operated among the plurality of keys by changing the light emission of one or more of the plurality of light emitting sections over time.
The guide control unit controls two or more of the light emitting units of the plurality of light emitting units in a direction from a first key of the plurality of keys to a second key to be operated next to the first key. The performance system according to claim 1, wherein light emission is changed over time.
2. 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. performance system.
The performance system according to claim 3, wherein the guide control section causes each of the two or more light emitting sections to sequentially emit light in a direction from the first key to the second key.
The guidance control section includes:
The performance system according to claim 4, wherein the second light emitting section is caused to emit light after performing an operation of changing the light emission of the two or more light emitting sections over time.
The performance system according to claim 2, wherein the guide control section repeats an operation of changing the light emission of the two or more light emitting sections over time.
The performance system according to claim 2, wherein the guide control section controls the speed at which the light emission of the two or more light emitting sections is changed over time in accordance with the performance speed of the music piece.
The performance system according to claim 2, wherein the guide control section controls the speed at which the light emission of the two or more light emitting sections is changed over time in accordance with the duration of a note corresponding to the first key in the music piece.
The performance system according to claim 1, wherein the guide control section changes over time the light emitting characteristics of a light emitting section corresponding to a key to be operated among the plurality of light emitting sections.
multiple keys,
and a performance guide unit that presents to the user a guide display that changes over time from a first key of the plurality of keys to a second key that is to be operated next to the first key. performance system.
A system for controlling a keyboard instrument comprising a plurality of keys and a plurality of light emitting parts arranged along the plurality of keys, the system comprising:
a music processing unit that specifies a key to be operated among the plurality of keys;
A control system comprising: a guidance control section that guides a key to be operated among the plurality of keys by changing light emission from one or more of the plurality of light emitting sections over time.
A method for controlling a keyboard instrument comprising a plurality of keys and a plurality of light emitting parts arranged along the plurality of keys, the method comprising:
identifying a key to be operated among the plurality of keys;
A control method realized by a computer system, wherein a key to be operated among the plurality of keys is guided by changing light emission from one or more of the plurality of light emitting parts over time.