JPS6336345Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a key-pressing instruction device used for performance lessons and the like in an electronic musical instrument having a keyboard, and particularly relates to a key-pressing instruction device capable of giving a key-pressing instruction according to a chord performance mode. Conventional key press instructing devices assist chord performance by instructing the keys of each note that makes up the chord to be played (for example, if the chord is C major, the C note, E note, and G note). There is something I did. By the way, in recent years, electronic musical instruments such as electronic organs have a chord playing mode (this chord playing mode is called the fin guard chord mode, hereinafter referred to as FC), in which the chord is played by pressing the keys of each note that makes up the chord
(abbreviated as mode), you can specify the chord type by pressing the key corresponding to the root note of the chord (root key) and a white key or black key near the same root note, or specify the chord type as described above. A chord performance mode (this chord performance mode is called single finger chord mode, hereinafter abbreviated as SF mode) is provided in which chords are played by specifying the chord type by the number of keys pressed, including the root key. This is intended to simplify chord performance. And in this case, the above
It is desirable to be able to teach chord performance by giving key press instructions in each chord performance mode such as FC mode and SF mode. In view of the above circumstances, this invention provides a key press instruction device that can issue key press instructions according to each chord performance mode. The key display data corresponding to the chord performance mode selected by the chord performance mode selection switch is sequentially read out according to the chord data, and this key display data is used to display a key press instruction. . Hereinafter, an embodiment in which the key press indicating device according to the invention is applied to an electronic organ (electronic musical instrument) will be described in detail with reference to the drawings. First, examples of chord key presses in the SF mode and chord key presses in the FC mode in this embodiment will be shown with reference to FIGS. 1 and 2. Fig. 1 shows an example of pressing chord keys in the SF mode. In this figure, 1a, 1a, .
The root keys to be pressed in a, . . . are shown by black circles, and each key to be pressed to specify a chord type is shown by a white circle. In addition, a, b, c, and d in A in this figure show examples of key presses for C major, C minor, C seventh, and C minor seventh, and a, b, c, and d in B in the same figure show examples of key presses for C major, C minor, C seventh, and C minor seventh. Examples of key presses for minor, B seventh, and B minor seventh are shown, and a, b, c, and d in C of the same figure are A# major, A# minor,
Examples of key presses for A#7th and A#minor seventh are shown, and a, b, c, and d in FIG. In other words, this SF
In this mode, major chords are played by pressing only the root key, minor chords are played by pressing the root key and the first black key on the bass side of the same root key, and seventh The chord is played by pressing the root key and the first white key lower than the same root key, and the minor seventh chord is played by pressing the root key and the first black key lower than the same root key. and white keys to play. Fig. 2 also shows examples of chord key presses in the FC mode, and each chord keyboard 1a,
In 1a, . . . , the root key to be pressed is shown by a black circle, and the keys to be pressed other than the root key are shown by white circles. Also in this figure, as in Figure 1, a, b, c, d of A are C major, C minor,
Examples of key presses for C seventh and C minor seventh, a, b, c, and d for B are B major, B minor, B seventh, and B minor seventh, a, b for C,
c, d are A# major, A# minor, A# seventh,
A#minor seventh key press example, also d a, b,
c, d are F# major, F# minor, F# seventh,
Examples of key presses for F# minor seventh are shown.
That is, in this FC mode, a chord is played by pressing the keys of each note that makes up the chord. Next, FIG. 3 is a block diagram showing the configuration of this embodiment. In this figure, the musical score data writing means 2 includes, for example, musical score data read by a reading device (not shown) from a recording medium such as a magnetic tape affixed to the musical score, a program switch, a note length designation switch, and a key. It is composed of a writing circuit that writes musical score data inputted via the musical score data memory 3 into the musical score data memory 3. In this case, the musical score data includes melody data in which note codes representing each note in the melody portion of the song are arranged in the order of performance, and chord data in which chord codes representing each chord in the chord portion of the song are arranged in the order of performance. It's summery. The note code is a pitch code indicating the pitch of the corresponding note, that is, a key code indicating the key corresponding to the same pitch (consisting of a 4-bit note code indicating the note name and a 3-bit octave code indicating the octave). bit code)
and a note length code indicating the note length of the same note. Note that a rest is represented, for example, by setting all pitch codes to "0". In addition, the chord code includes a chord name code indicating the root note name of the corresponding chord (for example, C, C#, D, ...), the chord type (for example, major, minor, ...), and the length (time) of the same chord. This is a combination code with a length code indicating the length. In this case, the chord name code is composed of 6 bits, the lower 4 bits of which represent the root note name, and the upper 2 bits of which represent the chord type. The musical score data memory 3 is composed of, for example, a random access memory (RAM), and the musical score data memory 3 stores the corresponding melody data and chord data in the musical score data by the musical score data writing means 2. stored in the area. The readout control circuit 4 is a circuit that sequentially reads out the melody data and chord data from the musical score data memory 3 in the order in which the music progresses when a performance start command is given, and is configured as follows. That is, this read control circuit 4 accesses the two areas in the musical score data memory 3 in parallel using the address signal ADDR, reads out and temporarily stores the current note code in the melody data, and also reads out the current chord code in the chord data. Read and temporarily store the key code of the current note code.
While outputting KCA, it also outputs the chord name code CHC of the current chord chord. Furthermore, this read control circuit 4 uses the tempo clock TCLK output from the tempo oscillator 5 to measure the note length indicated by the note length code of the current note code, and when this note length has elapsed, the next note is read from the score data memory 3. The note data is read and temporarily stored as current note data. The readout control circuit 4 also measures the time indicated by the length code of the current chord using the tempo clock TCLK, and when this time has elapsed, reads the next chord from the musical score data memory 3, and uses this chord as the current chord. Temporarily memorized as a chord code. The octave addition circuit 6 includes the readout control circuit 4
A 3-bit octave code is added to the root note name corresponding to the lower 4 bits (b ₃ to b ₀ ) of the chord name code CHC output from the key code KCB.
Generate and output. On the other hand, the timing signal source 7 is a signal source that sequentially generates timing signals T0, T1, T2, T3, and T4 having the same time width. Further, the multiplexer 8 converts the key codes KCA, KCB and the key code KCC sent from the gate 10 of the key display data generating section 9, which will be described later, into the timing signals T0 to
This is for time-sharing transmission using T4.
While the timing signal T0 is a "1" signal, the input terminal A and the output terminal O are electrically connected, and while the timing signal T1 is a "1" signal, the input terminal B and the output terminal O are electrically connected. There is conduction between the input terminal C and the output terminal O while any one of the timing signals T ₂ to _{T 4} is a "1" signal. In this case, the gate 10 outputs a key code KCC of a key other than the root key corresponding to the chord to be played, depending on the chord performance mode, chord type, etc., as will be described later. i.e.
The key code KCC in SF mode is not output when the chord name code CHC indicates major, and when the chord name code CHC indicates minor, it becomes the key code of the black key indicating minor in timing signal T2 (Fig. 1). ~D b), if the chord name code CHC indicates the seventh, it is a timing signal.
At T3, it becomes the key code for the white key indicating the seventh (see c in Figure 1), and the chord name code.
When the CHC indicates a minor seventh, the key code is a black key indicating a minor in the timing signal T2 or a white key indicating a seventh in the timing signal T3 (see d in FIG. 1). Also FC
The key code KCC in mode is the timing signal if the chord name code CHC indicates major.
At T2 and T3, each major third (major third relative to the root note)
degree, and similar expressions will be used in the following sentences. ), which becomes the key code for the fifth key (Fig. 2 I~
(refer to a), if the chord name code CHC indicates minor, the timing signal T2 and T3 will each have a minor 3.
If the chord name code CHC indicates the 7th, the major 3 key code will be the key code for the key of the degree and the fifth degree (see b in Figure 2 A to D).
This is the key code for the degree and minor seventh keys (Figure 2 I~
), and if the chord name code CHC indicates a minus seventh, the timing signals T2, T3, T4
These are the key codes for the minor 3rd, 5th, and minor 7th keys, respectively. Therefore, from the output terminal 0 of the multiplexer 8, each key code as shown in Table 1 is output according to the timing signals T0 to T4 and according to the chord performance mode and the chord type indicated by the chord name code CHC. Ru.

【table】

[Table] Next, the display circuit 11 includes a decoder that decodes the key code output from the multiplexer 8, a driver that amplifies the output of this decoder with current, etc., and has each of the white keys 12, 12, . . . of the keyboard 1. ...and a light emitting diode (or lamp, etc.) 1 provided in one-to-one correspondence to each black key 13, 13, ...
4, 14, . . ., only the one corresponding to the key indicated by the key code output from the multiplexer 8 is made to emit light. In this keyboard 1, the left keyboard section mainly used for playing chords is called the chord keyboard 1a, and the right keyboard section mainly used for playing melodies is called the melody keyboard 1b.
A two-tiered keyboard may be used as the keyboard 1, with the lower keyboard serving as a chord keyboard 1a and the upper keyboard serving as a melody keyboard 1b. Next, the configuration of the key display data generating section 9 will be explained. In this key display data generation section 9, the SF data memory 15 (key display data memory) is a read-on memory (ROM) used to generate key display data in the SF mode, and is used to specify the chord type of the chord to be played. Seven-bit data corresponding to the difference between the key code of the specified key and the key code of the root key is stored in advance. This SF
Reading of data from the data memory 15 is performed as follows using the 6-bit chord name code CHC and the timing signal T2 or timing signal T3. In other words, if the chord name code CHC indicates major, no data is read, and if the chord name code CHC indicates minor, the key code of the black key for specifying the minor and the key code of the root key are read out in the timing signal T2. The difference data with the key code (for example, in the case of c minor shown in Figure 1 A, b, the difference data between the key code of the A ₁ # key and the key code of the C ₂ key) is read out, and the chord name code CHC is Timing signal T3 if showing seventh
, the difference data between the key code of the white key and the key code of the root key for specifying the seventh (for example, in the case of C seventh shown in c in Figure 1 A, the key code of the B ₁ key and the key code of the C ₂ key) If the chord name code CHC indicates a minor seventh, the difference data between the key code of the black key for specifying the minor and the key code of the root key is read out at the timing signal T2. In the timing signal T3, difference data between the key code of the white key for specifying the seventh and the key code of the root key is read out. The data read from this SF data memory 15 is sent to one input terminal A of the selector 16.
supplied to FC data memory (key display data memory) is a read-on memory (ROM) used to generate key display data in FC mode, and contains the key code of each key that makes up the chord to be played and the key of the root key. Seven bits of data corresponding to the difference from the code are stored in advance. Reading of data from the FC data memory 17 is performed as follows using the 6-bit chord name code CHC and timing signals T2 to T4. In other words, when the chord name code CHC indicates a major key, the difference data between the key code of the major third key and the key code of the root key in the timing signal T2 (for example, in the case of the C major shown in a of Figure 2 A) The difference data between the E ₂ key code and the C ₂ key code) is read out and the timing signal is
In T3, the difference data between the key code of the fifth key and the key code of the root key (in the case of the C ₂ major, the difference data between the key code of the G ₁ key and the key code of the C ₂ key) is read. If the chord name code CHC indicates minor, the difference data between the key code of the minor third key and the key code of the root key is read out in the timing signal T2, and the key code of the fifth key is read out in the timing signal T3. The difference data between the key code of the key code and the key code of the root key is read out, and if the chord name code CHC indicates the seventh, the key code of the major third key and the key code of the root key are read out at timing signal T2. At the same time, in the timing signal T3, the difference data between the key code of the minor seventh key and the key code of the root key is read out, and if the chord code CHC indicates the minor seventh, timing signal
At T2, the difference data between the key code of the minor third key and the key code of the root key is read out, and at the same time, at the timing signal T3, the difference data between the key code of the fifth key and the key code of the root key is read out. Then, at timing T4, the difference data between the key code of the minor seventh key and the key code of the root key is read out. The data read from this FC data memory 17 is transferred to the other input terminal B of the selector 16.
supplied to Next, reference numeral 18 is a chord performance mode selection switch, and when this switch 18 is closed, the signal line 1
The signal SF of switch 9 becomes a "1" signal and the SF mode is selected. On the other hand, when the switch 18 is opened, the signal SF becomes a "0" signal and the inverter 2
The output signal FC of 0 becomes a "1" signal and the FC mode is selected. And the signal SF is the selector 1
It is supplied to the control terminal SA of No. 6. When the signal SF is a "1" signal, that is, in the SF mode, the selector 16 selects the input terminal A and stores the SF data memory 1.
5 is supplied to one data input terminal of the adder circuit 21, and when the signal SF is a "0" signal, that is, in the FC mode, input terminal B is selected and the data is read from the FC data memory 17. Data is supplied to one data input terminal of the adder circuit 21. The key code KCB is supplied to the other data input terminal of this adding circuit 21, and therefore, this adding circuit 21 outputs the key code of the key (excluding the root key) to be instructed to press. Become. The output of the adder circuit 21 is supplied to the input terminal of the gate 10. Next, the conditions for opening the gate 10 will be explained. First, SF
In the mode, the AND gate 22 is in an openable state and the AND gate 23 is in a closed state. Here, if the chord name code CHC indicates major,
In other words, if bit b ₄ (bit indicating minor) and bit b ₅ (bit indicating seventh) of the same chord name code CHC are both “0”, the AND gate 24,
25 are both closed, and therefore the OR gate 26 is closed, the AND gate 22 is closed, and as a result, the OR gate 27 is also not closed. Therefore, in this case, the "1" signal is not supplied to the enable terminal EN of the gate 10, so the gate 10 remains closed and the key code KCC is not output. Next is the chord name code
When CHC indicates minor, that is, when bit b ₄ of the same chord name code CHC is "1" and bit b ₅ is "0", the AND gate 24 is open at timing signal T2, and as a result, the OR gate is 26, and gate 22, or gate 2
7 is in the open state and the enable terminal of gate 10
A "1" signal is supplied to EN, and the gate 10 becomes open. Therefore, in this case, the gate 10 outputs the key code KCC of the black key indicating minor in the timing signal T2. Next is the chord name code
When CHC indicates the seventh, that is, when bit b ₄ of the same chord name code CHC is "0" and bit b ₅ is "1", the AND gate 25, the OR gate 26, and the AND gate 22 in the timing signal T3. , the or gate 27 is in the open state,
The gate 10 is in an open state. Therefore, in this case, the gate 10 outputs the white key code KCC indicating the seventh in the timing signal T3.
Also, if the chord name code CHC indicates a minor seventh, that is, bit b ₄ of the chord name code CHC,
If b ₅ are both “1”, the timing signal T2,
At T3, AND gates 24 and 25 are each opened, and as a result, gate 10 is opened.
Therefore, in this case, gate 10 is a timing signal
Black key code indicating minor at T2 and T3
KCC and the white key code KCC indicating the seventh are output. Next, in the FC mode, the AND gate 22 is in a closed state, and conversely, the AND gate 23 is in an openable state. In this FC mode, in the case of major, minor, and seventh, when the OR gate 28 and the OR gate 29 are opened at the timing signals T2 and T3, the AND gate 23 and the OR gate 27 are opened, and the gate 10 is opened. Also, when the chord name code CHC indicates a minus seventh, the AND gate 3 is added to the timing signal T4.
0 is in the open state, the gate 10 is in the open state at the timing signals T2 to T4. However, in the above-described portion of FIG. 3, when the reading control circuit 4 starts reading out the score data in the score data memory 3, in the SF mode, the light emitting diode corresponding to the key of the melody note is activated. 14, the light emitting diode 14 corresponding to the root key of the chord, the light emitting diode 14 corresponding to each key specifying the chord type, etc. emit light in a time-divisional manner, and in the case of FC mode, the light emitting diode 14 corresponding to the root key of the chord, and the light emitting diode 14 corresponding to each key specifying the chord type, respectively. The light emitting diodes 14 corresponding to the keys and the light emitting diodes 14 corresponding to the keys constituting the chord emit light in a time-division manner to issue a key press instruction. Next, in other parts of FIG. 3, the melody key switch circuit 31 is connected to the melody keyboard 1b.
It consists of key switches provided in one-to-one correspondence with each key, and an encoder that encodes the output of these key switches.When a performer performs a melody on the melody keyboard 1b, each key pressed is The corresponding key code KCD will be output. The chord key switch circuit 32 consists of key switches provided in one-to-one correspondence with each key on the chord keyboard 1a, and an encoder that encodes the output of these key switches, so that the player can play chords on the chord keyboard 1a. key code corresponding to each key pressed
KCE is output. This key code KCE is connected to the data input terminal A of the selector 33 and the follower tone forming circuit 3.
4 and 4, respectively. The follower sound forming circuit 34 is SF
mode, the key code KCE (in this SF mode, the key code KCE is the key code of the root key in the case of major, and the key code of the root key and the key indicating the chord type in the case of minor, seventh, and minor seventh). (consisting of a plurality of key codes), the root note and the chord type are detected, and the key code KCF of each constituent note of the chord is generated and output based on the combination of these. This key code KCF is supplied to the data input terminal B of the selector 33. The selector 33 selects and outputs the key code KCF in the SF mode,
On the other hand, in the FC mode, the key code KCE is selected and output. The musical tone signal forming circuit 35 generates and outputs a melody tone signal by adding a timbre to a tone source signal having a pitch (frequency) corresponding to the key code KCD, and also generates and outputs a melody tone signal corresponding to each key code supplied from the selector 33. A chord signal is generated by adding a timbre to a sound source signal of a pitch, and this chord signal is output according to a rhythm pattern. Further, the rhythm sound signal generation circuit 36 generates and outputs a predetermined rhythm sound signal in accordance with the tempo clock TCLK and in accordance with the rhythm pattern. The amplifier 37 synthesizes and amplifies the melody sound signal output from the musical sound signal forming circuit 35 and the chord signal and the rhythm sound signal output from the rhythm sound signal generating circuit 36, and supplies the synthesized signal to the speaker 38. However, the melodic key switch circuit 31,
According to the chord key switch circuit 32 and subsequent parts,
When a chord is played on the chord keyboard 1a according to the chord performance mode and a melody is played on the melody keyboard 1b, the speaker 38 emits the musical tones of the desired song. As is clear from the above description, according to the key press instruction device according to this invention, the chord data generation means for generating chord data indicating the chord to be played, and the key display data corresponding to the chord are set in the chord performance mode. Separately stored key display data memories and display means are provided, and key display data corresponding to the chord performance mode selected by the chord performance mode selection switch is sequentially read from the key display data memory according to the chord data; This key display data is used to display the key press instructions, so music performance lessons can be performed in the chord performance mode desired by the practitioner or in the chord performance mode appropriate to the practitioner's skill level. This makes it possible to significantly improve the effect of teaching chord performance.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of pressing a chord key in the single finger chord mode (SF mode) in an electronic organ to which an embodiment of the present invention is applied, and Fig. 2 is a diagram showing an example of pressing a chord key in the single finger chord mode (SF mode) in an electronic organ to which an embodiment of the present invention is applied. FIG. 3 is a block diagram showing the configuration of an electronic organ to which the same embodiment is applied. 1... Keyboard, 1a... Chord keyboard, 1b... Melody keyboard, 2... Score data writing means, 3... Score data memory, 4... Read control circuit (chord data generating means), 7... Timing Signal source, 8...
Multiplexer, 11...display circuit (display means),
14...Light emitting diode, 15...SF data memory (key display data memory), 16...Selector,
17...FC data memory (key display data memory), 18...Chord performance mode selection switch, 3
2... Chord key switch circuit, 33... Selector, 35... Follow tone forming circuit.

Claims (1)

[Scope of utility model registration request] A chord keyboard for playing chords, a chord playing mode selection switch for selecting a chord playing mode, and a chord playing mode selection switch for selecting a chord playing mode; and a chord playing mode selection switch for selecting a chord playing mode; and a chord playing mode selection switch for selecting a chord playing mode; A key press instruction device for an electronic musical instrument having a chord signal forming circuit that forms a chord signal for a performance mode, including chord data generating means that generates chord data indicating a chord to be played, and a chord corresponding to the chord indicated by the chord data. A key display data memory in which key display data to be played is stored for each of the chord performance modes, and key display data read out from the key display data memory according to the chord performance mode selected by the chord performance mode selection switch. 1. A key press instruction device comprising: display means for displaying a key press instruction.