JPH033235B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides the following features:
This invention relates to an electronic musical instrument that controls the generation of automatic accompaniment sounds together with a normal performer.

(Prior art) Conventionally, this type of device has been used, for example, in
As shown in the publication, when a melody keyboard is played, a melody sound signal is generated according to the performance operation, and when a chord keyboard is played, a chord is generated according to the performance operation. In addition to storing information representing the chord, a chord tone signal and a bass tone signal corresponding to the chord are generated in accordance with the stored information in accordance with the rhythm.

(Problem to be Solved by the Invention) However, in the conventional device described above, the melody keyboard and the chord keyboard are configured separately, and the melody keyboard cannot be used to play a melody. Since it is not possible to play chords using rhythm, such electronic musical instruments have the problem of requiring many keys. In addition, for electronic instruments that do not have many keys, especially electronic instruments with a single keyboard, if you have both a melody keyboard (key area) and a chord keyboard (key area), you can play the melody or chord. There is a problem in that the possible key range is limited and the performance function is severely restricted.

The present invention has been made in view of the above points, and its purpose is to effectively use the keyboard not only for normal performance but also for controlling the generation of automatic accompaniment sounds, and to use the keyboard sufficiently efficiently. The present invention aims to provide an electronic musical instrument that can improve performance functions.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the structural features of the present invention include a keyboard, and the first and second series of musical tone signals are independently generated according to the key performance operation on the keyboard. an electronic musical instrument comprising: first and second musical tone signal generating means for generating musical tone signals; and a detecting means for detecting a chord key press on the keyboard; storage means for updating and storing chord key press information and controlling generation of the first series of musical tone signals in the first musical tone signal generating means based on the stored chord key press information; and the first musical tone signal generating means. rhythm means for controlling the generation of the first series of musical tone signals in the means according to the rhythm; and a rhythm means for controlling the generation of the first series of musical tone signals according to the rhythm; and a rhythm means for controlling the generation of the first series of musical tone signals in accordance with the rhythm; a first musical tone signal generating means for controlling the second musical tone signal generating means to generate a musical tone signal of
a control means; when a chord key press is detected by the detection means; selecting key information relating to one of the keys pressed on the keyboard; and selecting the second series of keys corresponding to the selected key information. and a second control means for controlling the second musical tone signal generating means so as to generate a musical tone signal.

(Operation of the Invention) In the present invention configured as described above, when a player performs a performance operation on the keyboard, the first and second musical tone signal generation means generate the first and second series of musical tones corresponding to the performance operation. A signal is generated.

In such a case, if the performance operation on the keyboard is related to pressing a non-chord key, such as a melody performance, the first control means controls the second musical tone signal generation means, and the first control means controls the second musical tone signal generation means. A second series of musical tone signals, for example, a melody tone signal, corresponding to the keys pressed on the keyboard is generated. In this case, since the detection means does not detect a chord key press, the chord key press information in the storage means is not updated, and the second control means controls the generation of the second series of musical tone signals. There's nothing to do.

On the other hand, if the performance operation on the keyboard is related to pressing a chord key such as pressing two keys simultaneously or pressing three keys simultaneously, the detection means detects the chord pressing, and the storage means responds to the detection. Then, the chord key press information corresponding to the chord key press is updated and stored. Then, until the chord key press information stored in the storage means is updated by the next chord key press on the keyboard,
Based on the stored chord key press information, a first series of musical tone signals (for example, a chord tone signal or a bass tone signal) is produced from the first musical tone signal generating means in accordance with the rhythm. In addition, in response to the detection of a chord key pressed by the detection means, the second control means selects key information regarding any one of the keys pressed in a chord on the keyboard, for example, any one key. Since the second musical tone signal generating means is controlled to generate a second series of musical tone signals corresponding to the selected key information, keys related to non-chord keys pressed at the same time as chord keys, for example, melody performance. Regarding the key, the musical tone signal related to the key is outputted as a second series of musical tone signals, for example, a melody tone signal. In such a case, the key related to the non-chord key press usually corresponds to one of the plurality of notes that make up the chord or a note closely related to the chord due to the harmonic relationship, and the information regarding the key is used to press the chord key. There is no problem with music even if it is stored as part of the key information.

(Effects of the Invention) As is clear from the above description of the operation, according to the present invention, one keyboard can be used to generate a first series of musical tone signals, for example, an accompaniment tone signal, whose output is controlled according to the rhythm, and to perform a performance. Since the keyboard can be used in common to generate a second series of musical tone signals corresponding to the operated keys, such as a melody tone signal, the keyboard can be used efficiently and can be used for electronic musical instruments with a reduced number of keys, such as a single-key keyboard. Even with musical instruments, you can enjoy a wide range of performances with fewer restrictions.

Also, when a chord is pressed on the keyboard, the musical tone corresponding to one of the keys pressed is the second.
Since the musical tone signals of the series are played as, for example, melody tone signals, the first series of musical tone signals is prevented from being interrupted, and the generation of the musical tone signals is not unnatural.

(Example) An example of the present invention will be described below with reference to the drawings. Figure 1 shows its configuration, with keyboard 11
This key press information is used to control the first and second opening/closing circuits 12a and 12b connected in parallel, and the sound source signal corresponding to the pitch of the operation key is sent to the sound source circuit. Deriving the selection opening/closing from 13,
It is supplied to gate circuits 33a and 33b. and,
Each sound source signal taken out from these opening/closing circuits 12a, 12b and passed through gate circuits 33a, 33b is supplied to the tone filter 14 via a switch 34 or directly, and is converted into a musical tone signal having an appropriate tone formed by the tone filter 14. This musical tone signal is guided to an amplifier and speaker circuit section (not shown in the figure), and is produced as a performance sound.

Further, a detection signal from a key press detection circuit 16 that detects a chord key press on the keyboard 11 by detecting a simultaneous press of a plurality of keys on the keyboard 11 is supplied to a set terminal of a flip-flop circuit 35, The detection signal is delayed by one tone generation time by a delay circuit 36 and then supplied to a reset terminal of a flip-flop circuit 35. In order to ensure that one musical tone is generated in this set state of the flip-flop circuit 35, a gate circuit 33a is activated.
After the one musical tone is generated, the gate of the gate circuit 33b is opened in the reset state. When multiple keys are operated simultaneously to specify a chord on the keyboard 11, the highest note priority selection circuit 37 selects only the key depression information of the highest note, controls the first opening/closing circuit 12a, and controls the first opening/closing circuit 12a. The opening/closing circuit 12b of No. 2 is controlled as it is in response to the operating keys of the keyboard 11.

On the other hand, key press information from the keyboard 11 is also supplied to the storage device 15. In this case, key press information is stored in a storage device for each pitch name of C, C#, ...B, and this storage device 15 is connected to a key press detection circuit 16 that detects chord key presses. A write command is given when a detection signal of
The pitch information stored in the storage device 15 is rewritten with new pitch information every time the detection signal is generated. The key press detection circuit 16 obtains a chord (multiple keys simultaneously) key press detection signal when a plurality of keys are simultaneously operated to press a chord on the keyboard 11.

That is, the keyboard 11 is basically used to play single notes such as melodies, and when specifying accompaniment notes, chords are played using, for example, three fingers. When three keys are operated simultaneously on the keyboard 11 in this way, a detection signal is obtained from the key press detection circuit 16, and three pitch information, which is the key press information at this time, is written in the storage device 15. The pitch information is supplied to the chord tone generation circuit 17 and the root note detection circuit 18 as an accompaniment tone signal. Then, the chord sound generation circuit 17 generates three sound source signals corresponding to the supplied three pitches as a chord sound source signal, and these chord sound source signals are collectively synthesized and taken out via the gate circuit 19. Further, the root note detection circuit 18 detects pitch information that is a root note from the three pitch information that is supplied. For example, from the storage device 15, C, E, G
When three pitch information is supplied, the pitch information of the root note C is detected and the bass tone generating circuit 20
This bass sound generation circuit 20 generates base sound source signals having a 1st and 5th relation to the detected root note, and supplies them to gate circuits 21a and 21b, respectively. The gate circuits 19, 21a and 21b perform gate control using the chord chord rhythm pulses and the 1st and 5th bass tone rhythm pulses from the rhythm pulse generating circuit 22, respectively, and the chord chord tone filter 2
3. The tone filter 24 for bass sounds forms each tone, and similarly to the performance musical tones, the tones are led to an amplifier and a speaker circuit to be generated as automatic accompaniment sounds.

FIG. 2 shows the storage device 15 and the keyboard detection circuit 16 of the above-mentioned embodiment.
This key switch S ₁ , S ₂ , ... is provided with S ₁ , S ₂ , ...
... are connected to a +V power supply via a resistor R, respectively. That is, the load resistor R ₀ connected to the common line 25 generates a voltage signal that increases in accordance with the number of keys operated simultaneously, and this voltage signal is supplied to the comparator 26 to set the set voltage V _ref Have them compare. Then, the above input voltage signal is the set voltage
When V _ref is exceeded, an output signal is generated from the comparator 26, and the one shot circuit 27 is driven to obtain a chord key press detection signal using a one shot pulse. In this case, the set voltage V _erf applied to the comparator 26 is specifically larger than the voltage value generated across the load resistor R ₀ when one key is operated, and when two keys are operated. This is set to be sufficiently smaller than the voltage value of the resistor _R0 at the time.

Furthermore, the storage device 15 is provided with input lines corresponding to the note names C, C#, . 29a,
This OR circuit 2 is connected to 29b...
The output signals from 9a, 29b, . . .
b... is supplied. Then, the read output signals from the delay storage elements 30a, 30b...
C, C#, . . . B are supplied as accompaniment sound generation control output signals to the chord sound generation circuit 17 and the root sound detection circuit 18, and also to the AND circuit 31a,
OR circuits 29a, 29b... via 31b...
return to each. And the AND circuit 28a,
28b... are supplied with the output signal from the one shot circuit 27 as a gate signal, and the output signal of the one shot circuit 27 is inverted by an inverter 32 and supplied to the AND circuits 31a, 31b... do.

That is, when a plurality of keys corresponding to, for example, C, E, and G are operated simultaneously on the keyboard 11 to specify a chord, the comparator 26 generates an output, and a one-shot pulse output is obtained from the one-shot circuit 27. The gates of AND circuits 28a, 28b, . . . open. Therefore, pitch information of "1" (corresponding to C, E, G, for example) of the input line corresponding to the pitch of the key being operated at that time is sent to the AND circuit 28a,
Delay memory elements 30a, 30b via 28b...
..., and after the one-shot pulse falls, the written pitch information is fed back to the output "1" of the delay memory elements 30a, 30b, etc., and is stored in the AND circuits 31a, 31b.
..., and is stored and held by establishing AND logic with the inverted signal "1" of the inverter 32. Then, when multiple keys are operated simultaneously (for example, F, A, C) to specify a chord different from the previous one, the output of the inverter 32 becomes "0" due to the one shot pulse output, and the above memory is The new pitch information (for example, F, A, C) is stored as described above and output as an accompaniment sound signal. Here, if the same key as the previous one is included in the second simultaneous multiple key operation, the AND logic of the AND circuit corresponding to that key is established, so
The same accompaniment tone signal is output from the delay memory element to which the output of the AND circuit is input, following the previous one.

Therefore, when a single note is being played on the keyboard 11 for a melody performance, the key press detection circuit 16
Since there is no detection signal in the gate circuit 33, the flip-flop circuit 35 is in a reset state.
a is closed and gate circuit 33b is open.
Therefore, the sound source signal from the second switching circuit 12b is selectively derived and guided to the tone filter 14, where it is produced as a melody performance sound.

In this state, when a plurality of keys are operated simultaneously on the keyboard 11 to perform a chord as well as a melody, a detection signal is obtained from the key press detection circuit 16, and the flip-flop circuit 35 is set.
A gate signal is given to the gate circuit 33a. Along with playing the melody, play the chords simultaneously on keyboard 1.
When performing in one part, the accompaniment notes are generally played with the left hand in a lower range than the melody notes. Therefore, in the highest tone priority selection circuit 37,
Only the key press information corresponding to the melody performance is selected and a command is given to the first opening/closing circuit 12a, and only the sound source signal corresponding to the melody performance is derived from the gate circuit 33a, and the switch 34 is turned on. By doing so, when multiple keys are operated simultaneously to play a chord, the melody performance sound can be effectively selected and generated based on the key press information for the melody sound performance, excluding the key press information for the chord performance operation. Become so.

On the other hand, when the detection circuit 16 detects a chord key press due to the melody and chord performance, the storage device 1
5 stores key press information from the keyboard 11 corresponding to the operated key at this time until the next chord key is pressed. In such a case, the storage device 15 stores the key press information for each note name C, C#, . . . There is no problem even if the key press information corresponding to the above is stored in the storage device 15. Then, a sound source signal corresponding to the chord sound corresponding to the stored pitch information is generated by the chord sound generation circuit 17, and the root sound of the stored pitch information is generated by the root sound detection circuit 18.
, and the bass sound generation circuit 20 generates 1st and 5th bass sound source signals. Therefore, by controlling the gate circuits 19, 21a, and 21b with the chord and bass rhythm pulses from the rhythm pulse generation circuit 22, automatic rhythm performance sounds of chord chords and bass notes are produced. become.

As a result, the keyboard 11 is used for both normal melody performance and specified performance of accompaniment sounds such as chords and bass, so that electronic musical instrument performance with effective automatic accompaniment can be performed. Become.

In addition, in the above explanation, when specifying a chord, key 11 is
The case where multiple keys corresponding to multiple notes constituting a chord are operated simultaneously was explained in . However, it may be difficult for beginners to select and operate multiple keys corresponding to the constituent notes of a chord on the keyboard 11, and in this case, specify only one key corresponding to the root note that specifies the chord. You may also do so. However, in this case, in addition to the key corresponding to the root note, other keys such as those on the treble side may be operated.
By setting the state of simultaneous operation after multiple operations, chord key presses can be detected using the pitch detection circuit 16 of the above embodiment,
At this time, only the pitch information of the lowest note is selected from among the plural key depression information from the keyboard 11, and
5.

In this case, since the storage device 15 stores only one pitch information (for example, C) corresponding to the root note, the chord tone generating circuit 17 stores three chord constituent notes (for example, C) corresponding to the root note. For example, C, E, G) are selectively generated. In addition,
In such a case, the action of the root note detection circuit 18 is not particularly necessary.

Furthermore, in this case, based on the plurality of key press information, the bass tone is prioritized and the chord tone signal and the bass tone signal are generated, so as in the case described above,
By controlling the opening/closing circuit 12a with priority given to high notes based on the plurality of key press information, a melody sound signal can be produced along with the chord sound signal and the bass sound signal. With this configuration, it is only necessary to press a plurality of keys in order to generate chord tones and bass tones. Therefore, even if you do not know the chord or press the wrong chord, the pitch information that is the basis for generating the chord and bass notes will be prioritized and the correct chord and bass notes will be obtained. . For example, even if the keys C, E, and G are not necessarily pressed, if the keys C and D are pressed, priority is given to the bass notes, and an accompaniment tone with C as the root note is formed.

Furthermore, in the above embodiment, all the keys on the keyboard 11 can be used to perform melodies and chords. Only the circuit for generating musical tone signals related to the lower key range may be used in common for melody performance and chord performance, similar to the above embodiment. In such a case, it is sufficient to simply enable melody performance in the upper key range.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an electronic musical instrument according to an embodiment of the present invention, and FIG. 2 is a diagram showing a key press detection section and a storage section in the above embodiment. Explanation of symbols, 11...Keyboard, 12a, 12b...
...Opening/closing circuit, 13...Tone source circuit, 15...Storage device, 16...Key press detection circuit, 17...Chord sound generation circuit, 18...Root note detection circuit, 20...Bass sound generation circuit, 22... ...Rhythm pulse generation circuit, 3
3a, 33b...gate circuit, 35...flip-flop circuit, 37...priority circuit.

Claims (1)

[Scope of Claims] 1. An electronic device comprising a keyboard and first and second musical tone signal generation means that independently generate first and second series of musical tone signals in response to key performance operations on the keyboard. In the musical instrument, a detecting means for detecting a chord key pressed on the keyboard; and a detecting means for detecting a chord key pressed on the keyboard, updating and storing chord key pressing information from the keyboard every time a chord key pressing is detected by the detecting means, and updating and storing the chord key pressing information from the keyboard based on the stored chord key pressing information. storage means for controlling the generation of the first series of musical tone signals in the first musical tone signal generating means; and the first musical tone signal in the first musical tone signal generating means.
rhythm means for controlling the generation of a series of musical tone signals according to the rhythm; and when the detection means does not detect a chord key press, the second
a first control means for controlling the second musical tone signal generation means to generate a series of musical tone signals; and a first control means for controlling the second musical tone signal generation means to generate a series of musical tone signals; and a first control means for controlling the second musical tone signal generating means to generate a series of musical tone signals; and a second control means for controlling the second musical tone signal generating means to select key information regarding the selected key and generate the second series of musical tone signals corresponding to the selected key information. Characteristic electronic musical instruments.