JPH11282337A - Push key display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recognize visually a following play key and key push timing. SOLUTION: Surface display plates 5 comprising key board type display lamps 51, 52 corresponding to key boards are provided, and next white key indicating lamps 11 and next black key indicating lamps 12 are arranged along the longitudinal direction of the plates 5. Keys played now are displayed by the display lamps 51, 52, and keys played next are displayed to be guided by the lamps 11, 12. For example, the indicating lamps out of the indicating lamps 11 are lit in positions separated by planed numbers from the lamps of the next played keys in a high-pitched tone side and a low-pitched tone side respectively, and the lighting positions thereof are approached stepwisely to the indicating lamps in the position to be key-pushed so as to recognize key-push timing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key press display device, and more particularly, to a key press display device capable of easily visually indicating a key press position and a key press timing of a keyboard instrument.

[0002]

2. Description of the Related Art Conventionally, in a keyboard instrument such as an acoustic piano or an electronic piano, a light emitting diode (hereinafter, referred to as "LED") arranged corresponding to each key is turned on, and a key to be depressed, a hand position and a finger. There has been provided a key press display device for instructing fingering guide information including fingering information including the above information. In this type of keyboard instrument, a key to be depressed, fingering information, and the like can be displayed based on the performance information, so that the player can easily perform according to the display on the key depression display device. The performance information including display data such as keys to be pressed and fingering information may be stored in a storage device in advance, or may be input from an external device such as a MIDI sequencer.

[0003]

In the conventional key-depression display device, the key-depression position can be displayed by turning on the LED. However, the next key-depression timing and the key-release timing after key depression are recognized. There was a problem that it was difficult. In other words, the next key press timing is the
Is turned off, and the LED corresponding to the key to be played next is turned on, so that it can be recognized. Therefore, there is a problem in that the performer cannot smoothly move the key pressing position, and it is difficult to eliminate the awkwardness of the performance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a key press display device which solves the above-mentioned problems, makes it easier to see the key press display, and allows the key press timing to be easily visually recognized.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the object, the present invention provides a key press display device for displaying a key press position and a key press timing of a keyboard instrument. And a plurality of indicators including a plurality of indicator lights corresponding to each key, and a plurality of indicators including indicator lights corresponding to at least each key, which are arranged in a pitch direction of the keyboard to indicate key press timing. A second display unit comprising a light, and a display key corresponding to a corresponding key among the display lights of the first display unit and the second display unit when the first key to be pressed is displayed. The indicator lights of the second display means are turned on at predetermined intervals on the treble side and the bass side from the indicator lights corresponding to the second key to be depressed next, and then the next key depression is performed. Step by step until display time ; And a lighting control unit, said first
The first characteristic is that the key and the second key are selected based on preset performance information.

Further, according to the present invention, the second display means includes:
A plurality of indicator lights corresponding to each key for displaying a key pressing timing, which are arranged at intervals from the key in a stepwise manner, and the lighting control means is provided for the first key to be pressed; At the time of the display, the indicator light corresponding to the corresponding key among the indicator lights of the first display means and the second display means is turned on, and the second key to be pressed next among the indicator lights of the second display means The indicator light at the farthest position is turned on, and then the lighting target of the indicator lights of the second display means is gradually approached to the second key until the next key press display. There is a second feature in this point.

According to the above-mentioned feature, the first display means is energized for the key press display, and the display target of the second display means is turned on for the key press timing display. Is controlled so that the indicator light gradually changes to a key closer to the key to be pressed next (the second key).

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing an external appearance of a main part of a key press display device of the present invention and a piano equipped with the key press display device. In FIG. 1, the key press display device 1 can be arranged adjacent to the keyboard 3 of the piano 2, for example, by sucking the rear surface of a keyboard cover 4 with a suction cup. Since it is considered that the key press display device 1 is particularly often used by beginners, the key press display device 1 does not need to correspond to the entire range of the piano 2, for example, all 88 keys. In the example shown in the figure, the key depression display can be performed in a range excluding a part of the high range and the low range.

The key press display device 1 has a keyboard type surface light emitting plate 5 for displaying a key press position. Above and below the surface light-emitting plate 5, LEDs (described later) indicating the next key pressing position are provided. The lighting of the surface light-emitting plate 5 for displaying key presses and the LEDs is controlled according to performance information input from self-study software 6 set in a slot (not shown). Self-study software 6
Is a ROM card, for example.

A display operation panel 7 includes a switch for starting the output of the performance information and a tempo key 8 for adjusting the tempo of performance and display. A display 9 is provided for displaying the number of measures, the distinction between the left and right hands used for key pressing, and the like. The key press display device 1 can also produce accompaniment, and a speaker 10 is provided for this purpose.

Next, the surface light-emitting plate 5 and the LEDs arranged corresponding thereto will be described. FIG. 2 shows a key press display device 1.
FIG. In the figure, the keyboard type surface light emitting plate 5 includes a white key display plate 51 and a black key display plate 52. The display plates 51 and 52 are for displaying a white key and a black key to be pressed, respectively, and preferably emit light in five colors corresponding to a finger used for key pressing, but are single color. Is also good. The white key light emitting plate 51 and the black key light emitting plate 52 use a semi-transparent resin plate, and LEDs are arranged on the back surface. White key light-emitting plate 5
A light scattering plate is preferably interposed between the LED 1 and the black key light emitting plate 52 and the LED in order to give the effect of causing the white key light emitting plate 51 and the black key light emitting plate 52 to emit light as a whole.
In order to make the white key light emitting plate 51 and the black key light emitting plate 52 emit light,
The LEDs provided for each may be only five single-color LEDs corresponding to five emission colors, or two-color LEDs.
And the like. By changing the current supplied to each LED element using a multicolor LED, five emission colors can be easily obtained.

Further, a next white key indicator light 11 and a next black key indicator light 12 are arranged on the upper and lower sides in the figure along the longitudinal direction of the surface light emitting plate 5. These indicator lights are not for displaying the key to be played at present, but for displaying the guide to the next key to be played so that the next key press timing can be recognized. A two-color LED is used. Here, a red LED element and a green LED are used so that the indicator lights 11 and 12 can be turned on in red and green, respectively.
A two-light LED in which the element is integrated is used. The next white key indicator light 11 is turned on to guide the white key to be played next, and the next black key indicator light 12 is turned on to guide the black key to be played next. Each indicator light 11, 1
Each of the two LEDs is positioned corresponding to the center position of the white key and the black key (for example, B, W), and the other LED is positioned so as to compensate for the gap therebetween (for example, Ba, W).
a).

Next, a control device of the key press display device 1 will be described. FIG. 3 is a block diagram showing a hardware configuration of the control device. The CPU 13 controls the entire key press display device based on a control program stored in the ROM 14. The CPU 13 has a port for connecting the self-study software 6 to the CPU 13. The ROM 14 contains a control program, musical tone waveform data, envelope control information, and the like. The RAM 15 is used as a work area and a buffer, and may be backed up by a battery or the like. The panel circuit 16 includes various switches such as the tempo switch 8 and the display 9 and an interface circuit thereof.

The performance information of the self-study software 6 includes note information (note data), that is, information indicating whether the note data is the main melody or accompaniment, and information indicating the finger to be used, in addition to the pitch and length of the note. Finger information is included.

The shift register 17 receives the display control data generated by the CPU 13 on the basis of the note data, and holds the display control data to hold the display control data. Each LED of the key light emitting plate 52
Drive the element. The shift register 17 has the number of stages corresponding to each of the LED elements. The output terminal of the shift register 17 is connected to a base of a switching element (described later), and each LED element is connected to a power supply via the switching element. The switching element is selected so that the LED is turned on when the bit of the display control data transferred to the shift register 17 is “0”, and is turned off when the bit is “1”. The driving circuit of the LED element will be further described later with reference to FIG.

The display data transmission circuit 18 has a shift register (not shown) for transmitting a signal. The display data transmission circuit 18 controls each bit of the display control data corresponding to each LED element under the control of the CPU 13. The data is transmitted as a serial signal, and a shift pulse of the shift register 17 is transmitted in synchronization with the signal. Therefore, the display control bit data for all of the LED elements is transferred at one time. The transfer speed is set to several hundred kilobits / second or more so that the flicker of the display at the time of transfer is not recognized by the naked eye. If a parallel buffer for latching data set in the shift register is provided instead of the shift register 17, low-speed transmission is also possible.

The tone generating circuit 19 is a circuit for generating a desired tone signal by a waveform reading method.
Referring to the waveform data as digital tone waveform sample values stored in the waveform memory set in the memory 14, waveform data is sequentially read out at address intervals proportional to the pitch to be sounded, and interpolation is performed. Generate a tone waveform signal. The tone generating circuit 19 has an envelope generating circuit that multiplies the musical tone waveform signal by an envelope signal based on the set envelope parameters to give an envelope.

The tone signal output from the tone generating circuit 19 is a digital signal, and is converted into an analog signal by the D / A converter 20. The tone signal converted into an analog signal is amplified by an amplifier 21 and then supplied to the speaker 10 to be sounded.

FIG. 4 is a flowchart showing the main processing of the CPU 13. In step S1, the RAM 15 and the tone generator 19 are initialized. In step S2, a preset switch event process is performed based on a change in the state of a switch or the like on the panel circuit 16. In step S3, automatic performance processing is executed based on the performance information of the self-study software 6. In the automatic performance processing, an automatic performance timer, that is, a timing counter, updated by a timer interrupt is advanced in proportion to the music tempo. When the automatic performance timer value matches the timing information of each sound data in the performance information, that is, when the sound generation timing is reached, the sound is generated according to the sound data.

In the automatic performance processing, only the performance information used for sound generation is processed in the automatic performance processing. For example, note data of the main melody is used for key press display, and note data of accompaniment is used for sound generation. The separation of the performance information can be performed based on information indicating whether the melody or the accompaniment is included in the note data. The process of separating performance information and performing automatic performance is known as a so-called "minus one function".

In step S4, a key press display process is performed. In this key press display process, a process for displaying the key press position, the next key press position, and the key press timing on the front display panel 5 or the like is performed based on the performance information. The performance information used for key press display is a part of the main melody excluding that used in the automatic performance processing.

Subsequently, the key press display processing (step S
4) will be described in detail. First, an example of connection of each of the LED elements for key press display will be described. FIG. 5 shows a main part of the next white key indicating light 11 and shows two indicating lights, that is, LEDs. The LED 30 has LED elements 30a and 30b,
The ED 31 has LED elements 31a and 31b. Here, the LED elements 30a and 31a emit red light, and the LED element 3
0b and 31b are green. LED element 30a
Is connected to a 5V power supply via a transistor 32, and its cathode is grounded via a resistor 33.
The base of the transistor 32 is connected to the output terminal of the shift register 17. LED elements 30b, 31a, 3
1b is similarly connected to the transistors 34, 36, 38 and the resistors 35, 37, 39, respectively, and the bases of the transistors 34, 36, 38 are connected to the output terminal of each stage of the shift register 17.

In operation, the LED elements 30a, 30b,
31a and 31b are turned on if the data in the corresponding shift register 17 is "0", and turned off if the data is "1". In the example of FIG. 5, the LED elements 30a and 31b are turned on,
The elements 30b and 31a are turned off. Therefore, LED3
0 is red and the LED 31 is green. In addition,
Since the LEDs 30 and 31 are two-color LEDs, they can of course be colored in orange as a mixed color of red and green, and are not limited to two colors of red and green.

The indicator lights provided on the white key display plate 51 and the black key display plate 52 and the LED element of the next black key indicator light 12 are also shifted registers through transistors as driving elements, like the LEDs 30 and 31 and the like. 17 can be connected.

Next, an example of the key press display will be described. FIG. 6 is a diagram showing a lighting example of the surface display plate 5, the next white key indicator light 11, and the next black key indicator light 12. Here, it is assumed that the key to be played first is E and the key to be played next is G ^# . First, a white key display plate 51E corresponding to the key E as shown in FIG.
Is turned on in red, and the next white key indicator light 11E corresponding to the white key display board 51E is turned on in red. Here, the red color of the white key display plate 51E indicates the thumb. On the other hand, the next black key indicator light 12G # corresponding to the key G ^# to be played next
, The next black key indicator lights 12LA and 12HA, which are respectively arranged on the bass side and the treble side three away from each other, are lit in green.

After turning on the next black key indicating lights 12LA and 12HA, the time from when the key E is played to the key G ^# , that is, the time T corresponding to the note length of the key E, is determined by the next black key indicating light 12LA.
Each time a time t (= T / L) corresponding to a quotient obtained by dividing by the interval L between G # and the next black key indicating lamp 12LA or 12HA is changed, the lighting position of the next black key indicating lamp 12 is changed.

That is, when the first time t has elapsed, as shown in FIG. 6B, the next black key indicator lights 12LB and 12LB
HB lights up green. When the next time t has elapsed, as shown in FIG. 6C, the next black key indicator lights 12LC and 12LC
HC lights green. When the next time t has elapsed, the next black key indicating lamp 12G # lights in red as shown in FIG. 6 (d), and at the same time, the white key display boards 51E and 11E are turned off and the black key display board is turned off. 52G # lights in orange. Here, it is assumed that the orange of the black key display plate 52G # represents the little finger.

When the black key display plate 52G # is turned on, the next white key indicator light 11 or the next black key indicator light 12 for guiding a key to be played next is turned on to guide the key G ^#. Is done. FIG. 6D shows a lighting example of the next white key indicator 11 when the key to be played next is C. That is,
The next white key indicator lights 11LA and 11HA, which are respectively arranged on the low tone side and the high tone side at a distance of three from the next white key indicator light 11C corresponding to the key C to be played next, are lit in green.

As described above, in this embodiment, when the key to be played is displayed, the next white key indicator light 11 or the next black key indicator light 12 moves the display to the next key to be played. Is displayed so that the display is narrowed down to one point. As a result, the time required to play the next key can be visually recognized.

FIG. 7 is a schematic diagram showing a main part of data stored on the RAM 15 used for key press display. In the figure, a storage area P stores each bit data of display control data corresponding to each LED element. The numbers in FIG. 7 indicate the areas corresponding to the respective LED elements, and the areas correspond to the number n of the LED elements, and are “0” to “n−1”.
Is set up. The bit data "0" is set in the area corresponding to the LED element to be turned on, and the LED to be turned off is set.
Bit data “1” is stored in an area corresponding to the element.

On the other hand, the storage area R stores performance information indicating a key to be pressed next, and the area Q stores performance information indicating a key to be pressed now. The performance information also includes pitch data and data indicating the color of the LED for lighting the white key display board 51 and the black key display board 52 corresponding to the key indicated by the pitch data, that is, finger information. The data in the areas R and Q are updated each time one piece of performance information is processed in the automatic performance processing.

Next, the process of setting the LED display control data will be described with reference to a flowchart. Step S in FIG.
At 10, it is determined whether or not the time parameter T indicating the time corresponding to the note length of the performance information is "0". Since the parameter T has been reset to "0" in the initialization of the main flowchart, the first determination in step S10 is affirmative. In step S11, of the performance information, one piece of performance information of the main melody displayed by key press is read. In step S12, the performance information stored in the area R, that is, the next key press information, is transferred to the current key press information storage area Q, and the newly read performance information is written in the next key press information storage area R.

In step S13, it is determined whether the process is the first process. If it is the first process, the process returns to step S11,
Further, one piece of performance information is read. As a result, the data is aligned in the region R and the region Q by performing the subsequent step S12. In the second and subsequent processes, step S13 is negative, and the process proceeds to step S14. In step S14, based on the pitch data included in the performance information in the area Q and the finger information, that is, the information on which finger to play, the surface light-emitting plate 5
Is determined, and “0” is set in the region P corresponding to the corresponding LED element.

In step S15, the next white key indicator light 11 or the next black key indicator light 12 located at a position corresponding to the pitch data of the performance information in the area Q is specified, and the corresponding scheduled color (FIG.
In this case, the bit of the area P relating to the LED element corresponding to (red) is set to “0”.

In step S16, a time corresponding to the note length of the performance information in the area R is set as a time parameter T. This time T is a function of the set tempo and note length. In step S17, time t (= T /
L) is calculated. L is a predetermined integer, for example, “L = 3”. In step S18, for example, the down counter is reset at time t and time T. The count value of this down counter is decremented according to a predetermined clock.

In step S19, according to the pitch data of the performance information in the area R, a predetermined interval (FIG. 6) is shifted from the key of the pitch (the key to be depressed next) to the bass side and the treble side.
The next white key indicator light 11 and the black key indicator light 12 provided at positions separated by three (according to FIG. 6) are identified, and the area corresponding to the LED element of the corresponding scheduled color (green in FIG. 6) Set each bit of P to "0".

In step S20, it is determined whether or not the time t has elapsed based on the value of the down counter, and if affirmative, the process proceeds to step S21. In step S21, the data stored in the area P for the next key press instruction is updated.
In other words, the next white key indicating lamp 11 and the black key indicating lamp 12 are stored in the area P so that the lighting positions of the indicating lights 11 and 12 are close to the next key pressing position (the position indicated by the data in the area R). The numbers indicating what was being changed are changed one by one. Specifically, the lighting position on the lower note side from the next key pressing position is moved to the higher note side, and the lighting position on the higher note side from the next key pressing position is moved to the lower note side.

In this manner, until the time T corresponding to the note length elapses, that is, until step S10 becomes affirmative, the lighting positions of the next white key indicating lamp 11 and the black key indicating lamp 12 indicating the next key pressing timing. Is changed every time t elapses. If the time T has elapsed, steps S11 to S19
Thus, a process based on the new performance information is executed.

In this way, the LED display control data is updated with the performance information read one after another, and the LED display control data is transferred from the area P to the shift register 17 at a predetermined interruption timing. The transfer timing to the shift register 17 is obviously set to be much shorter than the update timing of the area P.

Next, a second embodiment of the present invention will be described.
In the above embodiment, the next white key indicator light 11 and the next black key indicator light 1
2 and the lighting position was moved in the pitch direction to display the key pressing timing. In the second embodiment, a plurality of indicator lights are associated with each of the white key display plate 51 and the black key display plate 52. FIG.
FIG. 6 is a schematic diagram illustrating a main part of a key press display device according to a second embodiment. In the same figure, a multi-stage indicator lamp array (four stages in this example) corresponding to each light-emitting plate of the keyboard type surface light-emitting plate 5.
22 are provided. The indicator light at the position furthest from the surface light-emitting plate 5 and at the top L1 in the figure is a triangle, and the next steps L2 and L3
The indicator light at the stage L3 is square, and the indicator light at the lowermost stage L4 is circular, but is not necessarily limited to this shape.

The color of the indicator lamp in each stage may be the same color, but may be different for each stage. It is preferable that the indicator light in the lowermost row L4 has a different color from that of the uppermost one or has at least a function of emitting light of two colors of the same color and different colors. For example, the indicator light can be constituted by an LED, and it is preferable that at least the indicator light at the bottom L4 uses a two-color LED.

[0042] In operation, when should play the key F ^#, said key F ^# corresponding surface emitting plate 52F #, the bottom together are turned on with the color that is associated in advance the finger to be depressed L4
Is turned on in a predetermined color (for example, red).
At the same time, the indicator L1E of the uppermost row L1 corresponding to the key to be pressed next (E) is turned on in a predetermined color (for example, green).

Each time the time L corresponding to the tempo and the note length of the key F ^# is divided by the number of intervals between the indicator lights (that is, the number of steps -1), the lighting position of the indicator light corresponding to the key E is set to 1 Move down one by one. Then, when the next key pressing timing is reached, that is, when the time L has elapsed, the lowermost indicator light L4E of the indicator light train corresponding to the key E is lit in a predetermined color (for example, red). At the same time, the surface light-emitting plate 51E corresponding to the key E is lit in a color that is previously associated with the finger to be pressed.

At the key pressing timing, not only the indicator light in the lowermost row L4 is turned on, but all the indicator lights of the indicator light train corresponding to the corresponding key are turned on for better and clear display. You may do so. In addition, the emission color at that time may be appropriately changed, such as unifying all the colors to red.

In the second embodiment, the number of indicator lights is larger than that in the first embodiment, so that the number of stages of the shift register 17 can be selected in accordance with the number of LED elements.
A modification such as changing the size of the corresponding storage area P is required. Further, in order to turn on a predetermined indicator light in accordance with the above operation based on the performance information, FIG. 8 may be modified.

The indicator light indicating the position where the key is currently being depressed, that is, the indicator light in the lowermost row L4 is changed to another different color (for example, orange) before the time L corresponding to the note length elapses. By changing the key release timing, the key release timing may be displayed.

FIG. 10 is a flowchart showing the operation for displaying the key release timing. The same number of steps as in FIG. 8 indicate the same or equivalent processing. In FIG. 10, if step S20 is negative, the process proceeds to step S22 to determine whether or not the key release timing has been reached. The key release timing is determined based on whether or not the time T becomes, for example, 100 ms or less. If it is the key release timing, the process proceeds to step S23, where the bit of the area P corresponding to the scheduled LED element is set in order to change the color of the indicator light indicating the key currently pressed. For example, in order to emit orange light, the area P is set so that two LED elements emit light simultaneously.
Set the bits of

In the above-described embodiment, the time from the current key depression to the next key depression timing is displayed by changing the lighting position of the indicator light based on the note length of the performance information. However, the key depression timing is not limited to be displayed based on the performance information of the currently depressed key, but may be displayed based on the elapsed time from a preset reference time.
For example, in the example of FIG. 9, the indicator light of the uppermost row L1 may be turned on one bar before the key depression timing, and the indicator lights to be emitted may be sequentially switched to the lower row sequentially at a preset switching timing. .

In the above-described embodiment, the key is pressed by the surface light emitting plate 5, the next white key indicator light 11, the next black key indicator light 12, or the indicator light train 22, but the surface light emitting plate 5 is omitted. Alternatively, the display may be made only by the next white key indicator light 11, the next black key indicator light 12, or the indicator light train 22.

[0050]

As is clear from the above description, according to the present invention, the key press display and the next key press timing are clearly displayed by the indicator lamps. In particular, when the lighting position of the indicator light moves in the direction of the key to be pressed next, the timing of the next key press can be easily visually recognized.

[Brief description of the drawings]

FIG. 1 is an external view of a piano including a key press display device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the key press display device.

FIG. 3 is a block diagram illustrating a hardware configuration of a key press display device.

FIG. 4 is a flowchart illustrating main processing of a CPU 1;

FIG. 5 is a circuit diagram of a light emitting unit capable of selecting a light emission color.

FIG. 6 is a diagram showing an example of a display of a key press display device.

FIG. 7 is an explanatory diagram showing a control data format in a RAM.

FIG. 8 is a flowchart showing a key press display process.

FIG. 9 is an enlarged view of a main part of a key press display device according to a second embodiment.

FIG. 10 is a flowchart illustrating a modified example of the key press display process.

[Explanation of symbols]

1 ... key press display device, 2 ... piano, 3 ... keyboard, 5 ...
Surface light-emitting plate, 6: Self-study software, 9: Display,
DESCRIPTION OF SYMBOLS 10 ... Speaker, 11 ... Next white key indicator light, 12 ... Next black key indicator light, 17 ... Shift register, 18 ... Display data transmission circuit, 51 ... White key light emitting plate, 52 ... Black key light emitting plate, 30, 31 ... LED, 30a, 30b, 31
a, 31b ... LED element

Claims (7)

[Claims] 1. A key press display device for displaying a key press position and a key press timing of a keyboard instrument, wherein a first display comprising a plurality of indicator lights provided for each key to display the key press position. Means, a plurality of indicator lights arranged in a pitch direction of a keyboard for displaying key-depression timing, and at least a plurality of indicator lights including an indicator light corresponding to each key; and a first key to be depressed. Is displayed, the indicator light corresponding to the corresponding key among the indicator lights of the first display means and the second display means is turned on, and the second key to be pressed next among the indicator lights of the second display means is displayed. And lighting control means for lighting those at predetermined intervals on the treble side and bass side from the indicator lights corresponding to, and thereafter gradually decreasing the scheduled interval until the next key press display. The first key and the second key are preset Key depression display device characterized in that it is selected based on the performance information. 2. A key press display device for displaying a key press position and a key press timing of a keyboard instrument, wherein a first display comprising a plurality of indicator lights provided for each key for displaying the key press position. Means for displaying key-pressing timing, a second display means comprising a plurality of indicator lights arranged corresponding to each key and arranged stepwise from the key; When the first key is displayed, the indicator light corresponding to the corresponding key among the indicator lights of the first display means and the second display means is turned on, and the second one of the indicator lights of the second display means to be depressed next. The indicator light at the position furthest from the second key is turned on, and then, the indicator to be turned on among the indicator lights of the second display means approaches the second key stepwise until the next key press display. Lighting control means, wherein the first key and the second key are: Key depression display device characterized in that it is selected based on the order set performance information. 3. An indicator light of the first display means is formed in a keyboard shape, and an indicator light of the second display means is provided at a portion corresponding to a white key and a black key of the first display means. 3. The key press display device according to claim 1, wherein the key press display device is arranged adjacent to the key press display device. 4. The lighting control means according to claim 1, wherein said first display means is capable of emitting five colors, and emits light in a predetermined color among said five colors based on finger information included in performance information. The key press display device according to any one of claims 1 to 3, wherein 5. The key press display device according to claim 1, wherein, among the indicator lights of said second display means, one corresponding to each key also serves as said first display means. 6. The key press display device according to claim 2, wherein, among the indicator lights of said second display means, the one closest to each key also serves as said first display means. 7. The display lamp of the second display means is a display lamp capable of emitting two colors, and when the first key to be depressed is displayed, the display lamp emits light of a different emission color from the previous key. The key press display device according to any one of claims 1 to 6, wherein the lighting control unit is configured to cause the lighting control unit to perform the operation.