JPH0522914B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a musical note display that is attached to the keys of a keyboard instrument such as a piano, organ, reed organ, etc. The present invention relates to a player guidance device for a keyboard instrument, which allows a player to play music with the help of this display.

The player guidance device according to the present invention is useful for people who cannot read musical scores, or those who cannot match keys and notes as they wish even if they can read musical scores, to play music without relying on musical scores. be.

<Prior art> Pianos and other keyboard instruments have been equipped with electronic computers that store musical scores, and have been made to automatically play the music stored in the storage device. The inconvenience is that he cannot play the piano.

When playing accompaniment chords in addition to the melody on a keyboard instrument, a chord display device that indicated only the key of the chord was developed, for example, in the Jitgen Showa era.
No. 49-42169. This code display device consists of a plurality of melody switches that are driven by each melody key when operated, a matrix circuit in which each of the switches is connected to a vertical line, and an output line of this matrix circuit that is connected to each other and lights up when the switch is output. and an indicator light corresponding to each pitch of at least one octave, and when the melody switch is driven by operation of a melody key, the matrix circuit displays a chord key corresponding to the pitch of the melody key. It is supposed to turn on the lights. This display device is designed to display only the chords to be played with the left hand, with indicator lights arranged corresponding to these keys, because even though it is possible to play a melody with a single note with the right hand, it is difficult to play the chords that match the melody with the left hand. This is how it is displayed.

<Problems to be solved by the invention> However, in the conventional display device described above, at least the melody must be able to be played while looking at the score, so it is difficult for people who cannot read music scores or to match keys to notes. It cannot be used by people who cannot use it, and of course it cannot be used if the song is simply a melody.

The purpose of the present invention is to enable even beginners to play the desired piece of music by instructing the performer to perform all the operations required for the desired piece of music using a note display, and by pressing the keys and pedals as necessary in accordance with the display. In order to do this, note codes are stored in advance in a storage device such as a programmable read-only memory, core memory, or magnetic bubble, and this is used as a fixed storage device, and during performance, these binary code information are decoded and stored using a microcomputer, etc. An object of the present invention is to provide a player guidance device in which information is displayed directly on a display device via a control circuit.

Still another object of the present invention is to provide a compact player guiding device with a simple structure that can be easily attached to an existing piano using a keyboard holder such as a piano.

<Means for Solving the Problems> The present invention has been achieved in accordance with the above-mentioned objects, and the gist thereof is to provide a keyboard instrument with one key for each key necessary for playing a predetermined piece of music. A note display body that displays notes in combination, and a fixed storage device such as a programmable read-only memory, a core memory, or a magnetic bubble that stores note codes pre-coded for the height and length of the notes of the song to be played. and a control circuit, and the control circuit includes a switch state detection circuit that detects when a key is pressed down or a pressed key is released as indicated by the display on the note display, and a switch state detection circuit that detects the note code from the fixed storage device. A keyboard including a display drive circuit that reads out and decodes the above-mentioned switch state detection circuit, and causes the next note of a piece of music to be displayed on the note display associated with the next key to be pressed in response to the output of the switch state detection circuit. This is a player guidance device for musical instruments.

<Example> Next, an example in which the player guidance device of the present invention is attached to an 88-key piano will be described.

In FIG. 9, a piano keyboard holder 25 is fixed to the main body of the piano at both ends with screws 70 or the like in order to suppress vibrations of the keys 15, 15' of the piano 10. In the present invention, this keyboard presser 25
As shown in Figure 1, all the white keys 1 of the piano are
5 and black key 15' respectively.
6 ₁ to 16 ₈₈ (Note display bodies may not be attached to all the white keys 15 and black keys 15', but only to the keys necessary for playing the music to be played). The note display bodies 16 ₁ to 16 ₈₈ are each composed of light emitting diodes a to h, and are embedded in appropriate recesses formed in the keyboard holder 25. However, note display 16 ₁
~ ₁₆₈₈ may be directly attached to the white key 15 and the black key 15' as shown in FIG. As will be described later, the musical note display bodies 16 ₁ to 16 ₈₈ are formed by integrally molding light emitting diodes a to h arranged in the shape of a musical note in a resin molded body, with necessary terminals drawn out. As shown in FIGS. 2a and 2b, it is fixed to the front opening of the keyboard holder 25 and is attached via a board with necessary wiring buried therein, or
As shown in the figure, it is attached to a correspondingly shaped recess provided in a white key 15 or a black key 15'. The note display bodies 16 ₁ to 16 ₈₈ may be attached to the mouthpiece located below the keyboard of the piano.

In Figure 1, 12 is 1 written on the musical score.
A fixed storage device such as a programmable ROM, non-volatile RAM, or magnetic bubble in which the pitch and length of one musical note is converted into a binary code; 13 is a computer signal reading/decoding/musical note display body 16 ₁ to 16 ₈₈ This control circuit includes a display drive circuit and a switch state detection circuit. The control circuit 13 sequentially reads the binary code information stored in the fixed storage device 12 from the immediate access storage device 12 in response to the player pressing down on a key or releasing the pressed key, and performs the following operations. It is used to operate and blink the light emitting diodes a to h of the musical note display bodies 16 ₁ to 16 ₈₈ so as to do so.

The fixed storage device 12 and the control circuit 13 form an integral component of a small electronic computer, and are attached to the piano. The connection cords of the keyboard holders 25 to the boards are pulled out respectively.

A musical score representing one piece of music includes the treble clef as a note symbol, notes and rests, dotted notes, speed indicators,
Various symbols are used, such as dynamic symbols and expression markers, but the most important of these are musical notes, which represent pitch and length. The player guidance device according to the present invention is mainly aimed at beginners, such as people who cannot read music scores, or people who cannot play by contrasting keys and notes as expected even if they can read music scores. is not necessarily necessary, and it is sufficient for most performances if the pitch and length of the notes are indicated one after another. By the way, there are whole notes, half notes, quarter notes, eighth notes, 16th notes, and 32nd notes to represent the length of a note, and these are known as ``tamajiyakushi''. It is represented by the symbol. This is visually displayed by selectively causing the eight light emitting diodes a to h shown in FIG. 3 to emit light according to a predetermined combination. In other words, a whole note uses only light emitting diode b, a half note uses light emitting diodes b, f, and a quarter note uses light emitting diodes a, f, and 8.
A diacritic note is displayed by light-emitting diodes a, f, c, a 16th note by light-emitting diodes a, f, c, d, and a 32nd note by light-emitting diodes a, f, c, d, e, respectively. In the musical note display body 16 ₁ shown in FIGS. 3 and 8, light emitting diodes a to
h are embedded in the resin molded body according to the arrangement shown in the figure, and for example, diode a has a round shape, and diode b has a ring shape around it. Other diodes c to h are similarly embedded in the resin molded body. each light emitting diode a
The eight lead terminals from ~h and the +B voltage terminal described later are drawn out as shown in the figure and connected to the control circuit 13, and the diodes a to h are selectively driven according to the binary information decoded by the control circuit 13. be done.
g and h are light emitting diodes representing dotted notes. In this example, there are 14 different levels of sound length, requiring 4 binary bits. Furthermore, assuming that note display bodies 16 ₁ to 16 ₈₈ are combined with each of the 88 keys,
The number of note representations is 88, which requires 8 binary bits. When displaying the pitch and length of one note, the number of bits for one note is 4+8=12 bits. This will be 12 bits. With these 12 bits as one block, all the data necessary for performance for all the notes of the musical score is recorded in a fixed storage device. At this time, it is convenient to store the fixed storage device in a compact cassette-like case.

In addition, for all 88 keys of the piano, note display 1
It is not always necessary to provide 6 ₁ to 16 ₈₈ ; for beginners' playing, it may be sufficient to use notes in a range of at most two octaves; The capacity can be reduced accordingly.

Further, as will be described later, during the performance, each time the performer hits a key 15 or 15' corresponding to one note, the note display bodies 16 ₁ to 16 corresponding to the next key 15 or 15' to be hit are displayed. ₈₈ light emitting diode a
~h selectively emits light.

Next, in order for the performer to perform, the control circuit 13 is activated by turning on the power or the like, and reads out the first note code of the piece of music from the fixed storage device 12. By decoding the 12 bits included in the first block, the pitch and length of the first note are determined, assuming the lowest note is the first key on the piano. Note 29 in Figure 1 is a "C" in C major, which is a quarter note, so it corresponds to the 40th key, counting from the 1st key, on a piano with 88 keys, including the black keys. This key is the note display 16 ₄₀ in Figure 1.
is displayed to represent a quarter note. This display method is shown in FIGS. 5 and 6. In FIG. 5, the rightmost block is the control circuit 13 of FIG. 1, and 88 conductive wires are housed in the lower part of this block, and each conductive wire is connected to the transistor TR ₁ combined with the note display bodies 16 ₁ to 16 ₈₈ . ~Connected to the base of the TR ₈₈ as shown. The figure shows three of the 88 musical note display bodies 16 ₁ to 16 ₈₈ 16 ₁ , 16 ₄₀ , 1
Only ₆₈₈ is shown. To explain only the musical note display 16 ₁ , the control circuit 13
One of the 88 conductors at the lower end is connected to the base of the transistor TR ₁ through a diode 50 with the polarity shown, and the point between the diode 50 and the base of the transistor TR ₁ is connected through a bias resistor 51 to the base of the transistor TR 1. Connected to the conductor connecting TR ₁ and +B power supply. This lead connects all transistors as shown.
Connect to TR ₁ to TR ₈₈ so that they are common.

A total of 88 conductive wires at the bottom of the control circuit 13 are key position specifying parts, and a voltage is applied only to the conductive wires corresponding to the key selected by the readout of the control circuit 13. For example, the transistor TR ₁ is turned on. do. On the other hand, the eight conductors shown in the center of the control circuit 13
a' _-1 , b' _-1 , ... h' _-1 are the resistances R ₁ a, R ₁ b ... respectively.
It is connected to the note display body 16 ₁ via R ₁ h, and forms a note length designation section. In addition, other note display bodies 16 ₂ to 16 ₈₈ , for example, note display body 1
For 6 ₄₀ and 16 ₈₈ , each of the 8 conductors is connected to a resistor.
R ₄₀ a, R ₄₀ b……R ₄₀ h, R ₈₈ a, R ₈₈ b……
Conductors a' _-40 to h' _-40 of control circuit 13 via R ₈₈ h,
Connect to a′ _-88 ~ h′ _-88 . If the note being read is a quarter note, light emitting diodes a, f must be energized. In FIG. 6, the cathode sides of the light emitting diodes a to h of the musical note display body ₁₆₄₀ are as follows:
Each of the transistors 41 is connected to the collectors of eight common emitter transistors 41 via resistors R ₄₀ a to R ₄₀ h, and the base potential of the transistors 41 is controlled by the control circuit 13 . With the control circuit 13 selecting the note display 16 ₄₀ , a control voltage is applied from the control circuit 13 to the transistors 41 combined with the light emitting diodes a and h.
join the base of Since transistor TR ₄₀ is conducting as mentioned above, this transistor
Note indicator 16 connected to TR ₄₀ Conductor wire at ₄₀
Only the light emitting diodes a and f leading to a' _-40 and f' _-40 emit light to indicate that it is a quarter note. Therefore, a quarter _{note is displayed on the note display 16 40 in} FIG. Press down. Note that this pressing time is not limited to one second, and can be set to any appropriate time desired by the performer.

Referring to FIGS. 2a and 2b, the operation of the control circuit 13 which confirms that the player has pressed a key and starts reading out the next block will be described. In FIG. 2a, the white key 15 corresponding to the note display 16 ₁
is not pressed down, and the contact 44 of the elastic contact conductor 43, which is fixed to the board attached to the keyboard holder 25 as shown by reference numeral 42 and located in the front part of the white key 15, is connected to the conductor 45 provided on the keyboard holder 25. Usually in contact. Conductor 45 is always held at ground potential, which corresponds to a binary "0". When white key 15 is not pressed down,
Current from the +B power supply flows through conductor 45 and no current flows through control circuit 13. When the white key 15 is pressed down, the state shown in Figure 2b is reached, and binary "1" is output from the +B power supply.
A current corresponding to the current flows through the control circuit 13. The control circuit 13 immediately starts reading the next block in response to this binary signal "1".

Note that if the control circuit 13 is activated immediately when one key is pressed, the next key will be instructed while one key is being pressed. You can also make the next key appear when you do so. The control circuit 13 shown as a block in FIG. 5 has a display drive circuit 80 that operates the note display bodies 16 ₁ to 16 ₈₈ based on read and decoded signals, and a switch state detection circuit 90, and detects the switch state. The detection circuit 90 is connected to a positive power source of, for example, 5V via switches S ₁ -S ₈₈ connected to the elastic contact wires 43 of the note indicators 16 ₁ -16 ₈₈ and a pull-up resistor circuit 100. When the player presses down one of the white keys 15, for example, the switch _S1 opens, and a voltage of 5V is applied to the detection circuit 90 from the positive power supply, and the white key 15 pressed down by the player opens the switch S1.
When you release switch _S1 is closed and grounded, so
This voltage decreases to 0V. In Fig. 5, switch _S1 opens when the key is pressed down and closes when the key is released, so the voltage of switch _S1 changes from 0V to 5V at the moment it is pressed down, and from 5V to 5V at the moment it is released. 0V
Each changes to Therefore, if the switch state detection circuit 90 is configured to submit the negative transition state of the signal, the next display will be displayed when the depressed key 15 is released. In this way, any piece of music in the key of C major, in the illustrated example, can be played by pressing down the designated keys one after another for a time corresponding to the length of the note.

In the present invention, the shapes of musical notes can be displayed even if liquid crystals, fluorescent display tubes, etc. are used in place of the light emitting diodes a to h. In addition, when the length of a note is specified using light emitting diodes a to h, the length of a note is programmed in advance according to the musical score to be played and stored in the fixed storage device 12, and the length of the note is programmed in advance for the specified time. When the light emitting diodes a to h of the display units 16 ₁ to 16 ₈₈ are made to emit light as described above according to the type of note, the performer can grasp the actual feeling of playing a quarter note or the like from the emitted light time, which is useful for music education. It is very useful. Furthermore, instead of the light emitting diodes a to h, the position of the next key to be pressed may be indicated simply by an indicator light. In this case, the electronic computer can be configured to display the length of the note in the form of the lighting time of the indicator light, thereby eliminating the need for a switch and a switch state detection circuit. Additionally, if the performer is familiar with a piece of music, they can generally play it accurately as long as the position of the next key to be pressed is displayed, so it is not necessarily necessary to match the lighting time to the length of the note. Therefore, it can be used with only the indicator light and the switch status detection circuit described above.

<Effects of the Invention> As described above, the present invention simply stores the notes of one song in a small electronic computer, and even beginners can press the keys according to the instructions by being instructed to press the keys one after another. The system was not designed so that even inexperienced performers could control their own speed and practice, gradually becoming able to perfect their performance. In detail, when a performer presses a certain key, the next key and note length can be displayed instantly, so you can see in advance not only the position of the next key to be pressed, but also the length of the note. This allows the performer to quickly recognize the next piece of music, and also allows the performer to move his/her hands and fingers smoothly.

In addition, the present invention does not require musical score notes as teaching materials, and each performer can press notes according to their ability while checking the length of the note as a note display with one combination for each key. Since it is possible to play keys, it enables performance practice that is similar to the guidance of experts, which is not possible with conventional devices.

Furthermore, by using a fixed storage device in the present invention, it is possible to eliminate the loss of data loading time and the troublesome operation caused by using an input medium such as a cassette tape or floppy disk or another storage device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entirety of the player guiding device according to the present invention, the electronic computer part is shown as a block diagram, and FIGS.
A schematic connection diagram of the switch mechanism, showing the states before and after the key is pressed, respectively. Figure 3 is a perspective view of one note display shown in Figure 1, and Figure 4 is a note display. 5 is a perspective view of a part of the keyboard section showing an example in which the keys are directly arranged on each of the white keys and black keys of the piano;
The figure is a connection diagram showing the circuit configuration for displaying the note length, Figure 6 is a circuit diagram for explaining the action of the light emitting diode of one of the note indicators in Figure 5, and Figure 7
The figure is a perspective view showing the entire player guiding device of the present invention;
FIG. 8 is a partially cutaway top view of the note display, and FIG. 9 is a perspective view of a portion of the piano to which the player guidance device of the present invention is attached. 10...Piano, 12...Fixed storage device, 13
...Control circuit, a~h...Light emitting diode, 1
5, 15'...Key, ₁₆₁ to ₁₆₈₈ ...Musical note display body, 80...Display body drive circuit, 90...Switch state detection circuit.

Claims (1)

[Claims] 1. For keyboard instruments, a note display body that displays notes in combination with all the keys required to play a given piece of music, and a pre-coded note height and length of the piece of music that is to be played. Programmable read-only memory that stores note codes,
It is composed of a fixed storage device such as a core memory or a magnetic bubble, and a control circuit, and the control circuit detects the state of a switch that detects the depression of a key indicated by the display on the note display or the release of a depressed key. a circuit, reads the note code from the fixed storage device, decodes it, and displays the next note of the song on the note display unit associated with the next key to be pressed in response to the output of the switch state detection circuit; A player guidance device for a keyboard instrument including a display drive circuit configured to