JPS637396B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides three keys in the same keyboard when generating chords.
The present invention relates to an electronic musical instrument in which, by pressing the above-mentioned keys, chords can be specified using a plurality of predetermined keys, and musical tone generation modes can be controlled using the remaining keys.

Traditionally, multiple keys were pressed simultaneously on the same keyboard,
Electronic musical instruments are already known in which one key specifies the root note of a chord, and another key specifies the type of chord (minor, seventh, etc.) (for example, see Utility Model Application Publication No. 19817-1981). ).

However, in this type of electronic musical instrument, the generation mode of musical sounds such as melody sounds, chords, and rhythm sounds (this includes control of musical sound characteristics such as timbre, volume, and effects, and control of switching between various operation modes) is controlled by the panel. Since this is performed based on the manual operation of a large number of controls provided on the surface, it is possible to control the desired tone generation mode by operating various controls during a performance, especially when playing a melody with chord accompaniment. It was extremely difficult to perform, and in this sense there were restrictions on musical expression.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new electronic musical instrument that can easily control the tone generation mode during accompaniment and is suitable for advanced performances.

The electronic musical instrument according to the present invention specifies a root note corresponding to one predetermined priority key among three or more keys pressed in the keyboard, and also specifies a root note corresponding to one or more predetermined keys other than the priority key. A chord type is specified in correspondence with a specific key, and a musical tone generation mode is controlled in correspondence with the priority key and the remaining keys excluding the specific key. , embodiments shown in the accompanying drawings will be described in detail.

FIG. 1 shows a circuit configuration of an electronic musical instrument according to an embodiment of the present invention.

The keyboard 10 includes an upper key range 10A for melody performance and a lower key range 10B for accompaniment, and a key switch circuit 12A for the upper key range and a key switch circuit for the lower key range correspond to these key ranges 10A and 10B, respectively. 12B is provided. Here, the key switch circuit 12A is used to switch between G ₃ and F ₆ of the upper key range 10A.
Contains a key switch KSW that supports 5 keys.
The key switch circuit 12B operates from _F2 of the lower key area 10B.
Contains a key switch KSW that supports 14 keys of F ₃ #. The reason why the lower key area 10B is made up of 14 keys is to enable chord type designation and tone generation mode control, as will be described later.

The key switch circuit 12A generates key press data based on key press operations in the upper key area 10A.
The key press data is supplied to the melody sound source circuit 14. The melody sound source circuit 14 electronically synthesizes a melody sound signal corresponding to the pitch indicated by the input key press data and supplies it to the timbre circuit 16, and the melody circuit 16 imparts timbre characteristics to the input melody sound signal. Send. The melody sound signal ME from the tone color circuit 16 is supplied to the speaker 20 via the output amplifier 18 and converted into sound.

On the other hand, in the chord forming section 22, the key switch circuit 12B generates key press data based on key press operations in the lower key area 10B, and the key press data is supplied to the selector circuit 24 as input a.
The selector circuit 24 has a memory mode signal _M0 of “0”.
At this time, the input key press data is supplied to the single note selection circuit 32.

Further, the key press data from the key switch circuit 12B is also supplied to the latch circuit 26 and the differentiating circuit group 28, and the latch circuit 26 is connected to an OR gate 30 which receives the differential outputs from the 14 differentiating circuits in the differentiating circuit group 28. The output signal is received as the load signal LD. Therefore, when any key switch in the key switch circuit 12B is closed, the latch circuit 26 latches the key press data from the key switch circuit 12B according to the output signal of the OR gate 30, and inputs it to the selector circuit 24 as input b. supply Since the selector circuit 24 is designed to receive the memory mode signal _M0 as the signal _Sb for selecting input b, when the signal _M0 takes the "1" level, the key press data from the latch circuit 26 is is supplied to the single note selection circuit 32 via the selector circuit 24. This state of supplying key press data (latch data) continues even after the key is released until the next key press due to the memory function of the latch circuit 26.

The single press selection circuit 32 preferentially selects the key press signal corresponding to the highest note (or the lowest note) from the key press data from the selector circuit 24 and supplies it to the note name discrimination circuit 34. The note name discrimination circuit 34 inputs key press signals with the same note name (F ₂ and F ₃ , F ₂ # and F ₃ #).
The root note designation signals corresponding to the 12 tone names C to B are generated by performing an OR operation on the 12 notes and directly deriving the other values, and each root note specification signal is supplied to the chord sound source circuit 36. Ru.

By the way, the circuit for forming the chord type designation signal S _n and the control signal CN includes an inverter circuit 38 including 14 inverters each receiving signals from the 14 output lines of the single note selection circuit 32, and a selector. It includes 14 AND gates each having one input as the signal of the 14 output lines of the circuit 24 and the other input as the output signal of the 14 inverters of the inverter circuit 38.
AND gate circuit 40 and this AND gate circuit 4
Among the output signals of 0, the output signal corresponding to the black key is input, and the chord type designation signal S _n for minor designation is generated.
OR gate 42 that generates and AND gate circuit 4
An OR gate 44 is provided which inputs the output signal corresponding to the white key among the output signals of 0 and generates a control signal CN for controlling the musical tone generation mode, and the chord type designation signal S _n is supplied to the chord sound source circuit 36. It is becoming more and more like this.

The chord sound source circuit 36 electronically synthesizes a chord signal based on the root note designation signal from the note name discrimination circuit 34 and the chord type designation signal S _n from the OR gate 42, and when the signal S _n is "0" Then, if the signal S _n is "1",
Then, a minor chord signal having a specified root note is generated. The chord signal CH from the chord tone source circuit 36 is given tone characteristics by a variable tone color circuit 46 and then sent to a gate circuit 48.
is supplied to

The variable timbre circuit 46 receives the output Q of the T-flip-flop 52 which is triggered by the control signal CN from the OR gate 44 via the timbre change switch 50.
The timbre characteristics are controlled according to the
If it is "1", each guitar tone is set. That is, when the switch 50 is turned on and the control signal CN becomes "1", the output Q of the flip-flop 52 becomes "1", so the timbre characteristic of the variable timbre circuit 46 is switched from the piano tone to the guitar tone. Change. And the control signal
When CN returns to "0" and then becomes "1" again, the output of the flip-flop 52 becomes "0" and the timbre characteristic of the variable timbre circuit 46 is switched from the guitar timbre to the piano timbre. Note that the flip-flop 52 may be omitted and the variable tone circuit 46 may be directly controlled by the control signal CN from the switch 50. In this case, the control signal CN may be "0" or "1". A piano tone or a guitar tone is set corresponding to each.

The rhythm change switch 54, when turned on, supplies the control signal CN from the OR gate 44 to the rhythm pattern generator 56.
The rhythm pattern generator 56 receives the control signal CN.
It is possible to change the rhythm tempo or rhythm pattern or stop the generation of the chord timing signal CT or rhythm pattern signal RP depending on the timing.

The code timing signal CT from the rhythm pattern generator 56 is supplied to the gate circuit 48,
The gate circuit 48 is intermittently controlled to be conductive in accordance with the code timing signal CT. Therefore, the chord signal CH' is sent out from the gate circuit 48 at a timing that matches the rhythm pattern, making it possible to perform a so-called autochord operation.

The rhythm pattern signal RP from the rhythm pattern generator 56 is supplied to the rhythm sound source circuit 58. The rhythm sound source circuit 58 drives an appropriate rhythm sound source according to the input rhythm pattern signal RP to generate a rhythm sound signal RY, and this rhythm sound signal RY is sent to the output amplifier 18 together with the chord signal CH' from the gate circuit 48. The signal is supplied to the speaker 20 via the speaker 20 and converted into sound.

When the memory mode selection switch 60 is turned on, the control signal CN from the OR gate 44 is set to T.
- It is supplied to the flip-flop 62, and when the flip-flop 62 is triggered by the control signal CN="1", the memory mode signal M ₀ = "1"
is starting to occur.

In order to generate a chord in the electronic musical instrument configured as described above, one or more keys may be pressed in the lower key area 10B of the keyboard 10. For example, when you press the key corresponding to G ₂ , only the root note G is specified, and the chord type designation signal S _n and control signal CN are "0", so
A mediocre chord signal CH having a root note G is generated. Also, if you press the key corresponding to G ₂ and the black key corresponding to F ₂ # at the same time, the root note G will be specified, while
The output signal of the AND gate corresponding to F ₂ # in the AND gate circuit 40 becomes “1” and the OR gate 42
generates the chord type designation signal S _n =“1”, so a minor chord signal CH having the root note G is generated. Furthermore, when the key corresponding to G ₂ and the white key corresponding to F ₂ are pressed at the same time, the root note G is specified, while the key corresponding to F ₂ in the AND gate circuit 40 is pressed.
Since the output signal of the AND gate becomes "1" and the OR gate 44 generates the control signal CN="1",
A mediocre chord signal CH having the root note G is generated, and various musical tone generation modes can be controlled based on the control signal CN.

Here, as for controlling the musical tone generation mode, if the tone color change switch 50 is turned on in advance, the tone color characteristics are controlled to be changed from the piano tone to the guitar tone. Furthermore, if the rhythm change switch 54 is turned on in advance, the rhythm tempo or rhythm pattern is controlled to change, or the autochord or autorhythm is controlled to be non-sounding. Furthermore, if the memory code selection switch 60 is turned on in advance, the memory mode signal _M0 becomes "1" and a chord generation operation in the memory mode based on the key press data from the latch circuit 26 is performed. In this memory mode, the latch circuit 26 stores the key press data even after the key is released until the next key press, so even if the length of the note to be played is long, the key press time is short. This has the advantage of simplifying the performance procedure.

In addition, 3 corresponding to G ₂ , F ₂ # and F ₂ respectively
If the keys are pressed at the same time, a chord type designation signal is displayed.
Both S _n and control signal CN become "1", and the root note G
A minor chord signal CH having the above-described minor chord signal CH is generated, and various musical tone generation modes control as described above become possible. Further, the above-described chord generation operation and tone generation mode control operation are performed in the same manner when other keys are pressed.

FIG. 2 shows a chord forming section 22' of an electronic musical instrument according to another embodiment of the present invention, and the same parts as in FIG. . The features of the embodiment shown in FIG. 2 are as follows:
Among the keys up to the second on the bass side of the root key, the black key specifies the minor and the white key specifies the seventh, and when the third and subsequent keys on the bass side of the root key are pressed, the manner in which musical sounds are generated is controlled. This is what I did.

The lower key range key switch circuit 12B' is a key switch KSW corresponding to 15 keys of _F2 to _G3 in the lower key range.
The key press data from the key switch circuit 12B' is supplied to the selector circuit 24, latch circuit 26, and differentiation circuit group 28 as in the case of FIG. Here, the reason why the lower key range is set to 15 keys is to enable chord type specification and tone generation mode control as described above.

The OR gate circuit 64 is connected to the F ₂ of the single tone selection circuit 32.
It includes 15 OR gates corresponding to the _G3 output line, and is designed to supply a signal to the AND gate circuit 66 to enable chord type specification. AND gate circuit 66 is selector circuit 2
15 ANDs corresponding to 4 F ₂ ~ G ₃ output lines
This includes a gate, and when a root key other than F ₂ is pressed, a chord type designation enable signal is generated from the OR gate circuit 64, and when a black key or white key up to the second bass side of the root key is pressed. and generates an output signal.

The OR gate 68 generates a chord type designation signal S _n for specifying a minor in accordance with the output signal of the AND gate circuit 66 corresponding to the black key, and the OR gate 70 generates a chord type designation signal S n for specifying the minor chord according to the output signal of the AND gate circuit 66 . A chord type designation signal _S7 for specifying the seventh is generated depending on the one corresponding to the white key. The chord type designation signals S _n and S ₇ are supplied to the chord sound source circuit 36 , and the chord type designation signals S n and S 7 are supplied to the chord sound source circuit 36 .
If both S _n and S ₇ are “0”, it is a major, if S _n is “1”, it is a minor, if S ₇ is “1”, it is a seventh, and if both S _n and S ₇ are “1”, it is a minor seventh. are now specified respectively.

The OR gate circuit 72 is connected to the F ₂ ~ of the single note selection circuit 32.
It includes 15 OR gates corresponding to the output line of _G3 , and is designed to supply a signal to the AND gate circuit 74 to enable control of the tone generation mode. The AND gate circuit 74 has 15 gates corresponding to the F ₂ to G ₃ output lines of the selector circuit 24.
This includes an AND gate, and when a root key other than F ₂ to _{G 2} is pressed, a tone generation mode controllable signal is generated from the OR gate circuit 72, and when the third or subsequent keys on the bass side of the root keys are pressed. It is designed to generate an output signal when it is activated.

OR gate 76 is F ₂ in AND gate circuit 74
It receives the output signal from the AND gate corresponding to _E3 as input, and is designed to generate a control signal CN for controlling the tone generation mode.

Now, as an example, if you press the key corresponding to G ₃ ,
Since the chord type designation signals S _n and S ₇ are both "0", the chord tone source circuit 36 generates a median chord signal CH having the root note G. Furthermore, when keys corresponding to G ₃ and F ₃ # are pressed, the chord type designation signal S _n becomes "1" and a minor chord signal CH having the root note G is generated. Furthermore, when the keys corresponding to G ₃ and F ₃ are pressed, the chord type designation signal S ₇ becomes "1" and a seventh chord signal CH having the root note G is generated. In addition, G ₃ , F ₃ # and
When the three keys corresponding to F ₃ are pressed simultaneously, the signals S _n and S ₇ both become "1", and a chord signal CH of the minus seventh having the root note G is generated.

By the way, if you press the key corresponding to G ₃ and the key corresponding to E ₃ , the root note G will be played as described above.
While the chord signal CH having a mean pitch is generated, the control signal CN is also generated, so that it is possible to control various tone generation modes as described in FIG. In this case, you can press the key corresponding to G ₃ and E ₃ at the same time as pressing the key corresponding to F ₃ # and/or F ₃ , and in this way, you can press the key corresponding to the minor, seventh, and minor seventh as described above. The chord type is specified.

Although the present invention has been described above in detail with reference to several embodiments, the present invention is not limited only to the above-described embodiments, and can be implemented in various modified forms.

For example, in order to specify the chord type, the following method (1) or (2) may be employed.

(1) When you press the key for the third time on the root key, the mejiya is
Pressing the minor 3rd key will specify the minor, and pressing the minor 7th will specify the 7th.

(2) Pressing a key a semitone below the root key will specify a minor, and pressing a whole note below will specify a seventh.

Furthermore, the musical sound generation mode control includes (a) volume control of any or all of melody sounds, chords, and rhythm sounds, (b) fill note on/off control, and (c)
Rhythm start on/off control can also be performed. Here, a file note is, for example,
When generating C major chords (C ₂ , E ₂ , G ₂ ) as accompaniment to the C ₆ melody note, C ₅ , E ₅ ,
It generates _G5 sounds at the same time.

Furthermore, in the above embodiment, an example was shown in which the single-level keyboard is divided into upper and lower keyboard areas, and the lower keyboard area is used for accompaniment, but the present invention provides an example in which the accompaniment keyboard (usually the lower keyboard) is used in an electronic musical instrument having a two-level keyboard. It can also be applied to an accompaniment section that includes.

As described above, according to the present invention, since it is possible to control the tone generation mode by the keyboard operation when a chord is pressed, it is possible to easily change the tone, volume, effect, operation mode, etc. during accompaniment. can. Therefore, the range of performance expression is expanded, which is convenient for performing sophisticated performances.

Furthermore, in this invention, when a plurality of keys including only a predetermined priority key and a specific key are pressed, a chord is specified, and three or more keys including the priority key, the specific key, and other keys are pressed. When you press , you can specify chords and control the tone generation mode.
The performer only needs to press other keys together with the priority key and the specific key when he/she desires to control the manner in which musical tones are generated, and since the performance can be clearly distinguished from normal chord performance, there is also the effect that the performance operation can be carried out smoothly.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an electronic musical instrument according to one embodiment of the invention, and FIG. 2 is a circuit diagram showing a chord forming section of an electronic musical instrument according to another embodiment of the invention. 10...keyboard, 12A...key switch circuit for upper key range, 12B, 12B'...key switch circuit for lower key range, 22, 22'...chord forming section, 26...
...key press data latch circuit, 32...single note selection circuit, 34...note name discrimination circuit, 36...chord sound source circuit, 42, 68, 70...OR gate for chord type designation signal generation, 44, 76...control For signal generation
OR gate, 46...Variable tone circuit, 50...Tone change switch, 54...Rhythm change switch,
60...Memory mode selection switch.

Claims (1)

[Claims] 1 (a) a keyboard; (b) a root note that generates a root note designation signal in response to one predetermined priority key among three or more keys pressed within the keyboard; (c) a chord type specifying means that generates a chord type specifying signal in response to one or more predetermined specific keys other than the priority key among the three or more keys; (d) the above. (e) chord signal forming means for forming and transmitting a chord signal based on the root note designation signal and the chord type designation signal; An electronic musical instrument comprising: (f) a control signal generating means for generating a control signal in response to a key; and (f) a control means for controlling a tone generation mode in accordance with the control signal.