JPS636788Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument, and particularly to an electronic musical instrument with an improved musical tone control switch circuit.

When playing an electronic musical instrument (for example, an electronic organ), it is often necessary to change the state of the musical tone (for example, the tone color) during the performance. In such a case, it is usually necessary to simultaneously operate a plurality of musical tone control switches (timbre selection switch, effect control switch, etc.). however,
During a performance, it is difficult to operate multiple tone control switches simultaneously with one hand, and in reality, the tone control switches are operated with both hands or one tone control switch at a time. As a result, inconveniences have arisen, such as the performance being temporarily interrupted, or the state of the musical tone being unable to be changed instantaneously, resulting in the temporary generation of a musical tone that the performer does not desire.

On the other hand, in order to eliminate this inconvenience, a plurality of musical tone states can be preset using a preset switch, and when the musical tone state needs to be changed during a performance, by operating the desired preset switch, Electronic musical instruments have also been considered in which the generated musical tone is automatically changed to a preset musical tone state. However, such electronic musical instruments have the disadvantage that the tone state presetting operation is cumbersome.

In view of these circumstances, this invention has been developed by simultaneously outputting the output signals of musical tone control switches sequentially operated within a certain period of time to a musical tone signal generation circuit after the elapse of the specified period of time. This allows the states to be changed at the same time.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the structure of an electronic organ (electronic musical instrument) according to this invention. In this figure, keyboard 1 consists of an upper keyboard (UK), a lower keyboard (LK), and a foot keyboard (PK), and each of these keyboards has multiple keys and multiple keys corresponding to these keys. It consists of a key switch and a key switch. The output of each key switch is then supplied to the musical tone signal generation circuit 2. The musical tone control switch circuit 3 consists of musical tone control switches such as a tone lever switch, a vibrato switch, and a tremolo switch, and switch circuits provided corresponding to each of these switches.The output of each switch circuit is connected to the control circuit 4. The signal is supplied to the musical tone signal generation circuit 2 via the signal. The musical tone signal generating circuit 2 is a circuit that generates musical tone signals based on the outputs of each key switch of the keyboard 1 and the output of the control circuit 4. That is, this musical tone signal generation circuit 2 generates a musical tone signal at a pitch corresponding to a pressed key on the keyboard 1 and in a musical tone state corresponding to the musical tone control switch operated by the musical tone control switch circuit 3, Supplied to the sound system 5. The sound system 5 includes an amplifier circuit, a speaker, etc., and amplifies the musical tone signal supplied from the musical tone signal generating circuit 2, and generates musical tone from the speaker. Further, the lamp circuit 6 is for displaying the operating status of each musical tone control switch of the musical tone control switch circuit 3, and includes a plurality of LEDs (light emitting diodes) provided corresponding to each switch and a drive circuit for these LEDs. Become,
Lighting is controlled by a signal from the control circuit 4.

In the above configuration, the musical tone signal generating circuit 2 and the sound system 5 are known circuits, and a detailed explanation will be given below focusing on the control circuit 4, which is the key point of this invention.

FIG. 2 is a block diagram showing the configuration of the lamp circuit 6, tone control switch circuit 3, and control circuit 4. As shown in FIG. In this figure, the musical tone control switch circuit 3 is composed of a large number of musical tone control switches and switch circuits 7a, 7b, . . . provided corresponding to each of these switches. Each switch circuit 7 is connected to the third switch circuit 7.
It is configured as shown in the figure. That is, each contact point 10a to 10 of the musical tone control switch 10
Trigger flip-flops (hereinafter abbreviated as T-FF) 11a to 11e are provided corresponding to each of the triggers e,
The outputs of these T-FF11a to 11e are the respective signals.
Output as d ₀ to _{d 4} . In this case, each contact 10
When any one of a to 10e becomes "closed", the output of the T-FF corresponding to the contact in the "closed" state becomes a "1" signal (a "1" signal at a binary logic level; the same applies hereinafter), Also control signal d ₁
When ~d ₄ becomes a “0” signal (the same applies below the '0' signal at the binary logic level), the output of the NOR gate 12 becomes a "1" signal, so the signal d ₀
becomes a '1' signal. Also, each T-FF11a~
11e are the corresponding contacts 10a to 10.
They are reset by the outputs of OR gates 13a to 13e, which take the OR of the output signals of the other contacts except for e. For example, T-FF11e has contact 10
OR gate 1 that takes the OR of output signals a to 10d
It is reset by the output of 3e. Furthermore, the output of the OR gate 14 which takes the OR of the output signals of the contacts 10a to 10e is output as the signal SW·ON. In other words, this signal SW・ON is at contact 10a
When any one of 10e becomes "closed", it becomes a "1" signal. Note that the musical tone control switch 10 has two or more contacts "closed" at the same time.
The state does not occur, and the contacts 10a to 10e
The structure is such that when switching, all of them are always in the "open" state. The contact 10a is a contact that becomes "closed" when the musical tone control switch 10 is turned "off".

Each switch circuit 7a, 7 configured in this way
The output signals d ₀ to _{d 4} of b... (Fig. 2) are all supplied to the latch circuit 17, and the output signal SW・ON
Both are supplied to the switch operation detection circuit 18. The switch operation detection circuit 18 is the switch circuit 7
When any of the signals SW・ON outputted from a, 7b, . This circuit detects the rising edge of ON and outputs the pulse signal S1 shown in FIG. The latch circuit 17 is a circuit that temporarily stores the signals _d0 to _d4 , and when the signal S1 is supplied from the switch operation detection circuit 18 to the load terminal L, the latch circuit 17 stores the signals outputted from each switch circuit 7a, 7b, . . . at that time. It reads d ₀ to _{d 4} and supplies the read signals to the memory circuit 20 and the gate circuit 21 . The timer circuit 19 is a so-called one-shot multivibrator, and when the pulse signal S1 is supplied to its input terminal, it is triggered by this and outputs the output signal S.
2 (see FIG. 4B) is a circuit in which the signal becomes "1" for a certain period of time T. Note that this timer circuit 19
Once time measurement is started (when the output signal S2 becomes a "1" signal), it is not affected in any way by the input of the pulse signal S1. The output signal S2 of this timer circuit 19 is supplied to a falling differentiation circuit 22. The falling differentiation circuit 22 is a circuit that generates a pulse signal S3 (see FIG. 4, c) at the falling edge of the signal S2 supplied to its input terminal, and the pulse signal S3 is connected to the enable terminal EN of the storage circuit 20. and is supplied to the input terminal of the delay circuit 23. At the same time as the pulse signal S3 is supplied to the enable terminal EN, the memory circuit 20 reads the output of the latch circuit 17 supplied to its input terminal, and outputs the tone signal generating circuit 2 (FIG. 1) and the OR circuit 24.
This is a circuit that outputs to. Further, the delay circuit 23 delays the signal S3 for a certain period of time and supplies it to the reset terminal R of the latch circuit 17, thereby resetting the latch circuit 17.

When a plurality of musical tone control switches 10 are sequentially operated during the performance of this electronic organ, the first musical tone control switch 10
At the same time as the switch operation detection circuit 18 outputs a pulse signal S1, the timer circuit 19 starts measuring a certain period of time T, and the switch circuit 7a,
_7b ... are read into the latch circuit ₁₇ . Next, turn on the other musical tone control switch 1.
0 is sequentially operated within a certain time T, the signals d ₀ to _{d 4} that change as a result are sequentially read into the latch circuit 17, but since the signal S3 is not yet supplied to the enable terminal EN of the memory circuit 20, The output of the latch circuit 17 is not read into the storage circuit 20, so there is no change in the musical tone signal in the musical tone signal generating circuit 2 (FIG. 1). Then, when a certain period of time T has elapsed since the first musical tone control switch 10 was operated, a signal S3 is outputted from the falling differentiation circuit 22, and this causes the latch circuit 1 to be stored in the memory circuit 20.
7 outputs (multiple musical tone control switches 10
The signals corresponding to the output signals _d0 to _d4 of the respective switch circuits 7a, 7b, . As a result, the musical tone signal changes and a new musical tone is generated from the sound system 5.

In this way, in this electronic organ, when a plurality of musical tone control switches 10 are sequentially operated within a certain period of time T, the musical tone state in the musical tone signal generation circuit 2 is changed at the same time as the certain period of time T elapses, thereby controlling the musical tone. It is possible to prevent musical sounds that are not desired by the performer from occurring when the switches 10 are sequentially operated.

Next, the gate circuit 21 and OR circuit 24 in FIG. 2 will be explained. The gate circuit 21 is a circuit that opens/closes the output of the latch circuit 17.
This opening/closing is performed periodically by the output of the pulse generator 26. The output of this gate circuit 21 is then supplied to an OR circuit 24. OR circuit 24
is a circuit which takes an OR between each output bit of the gate circuit 21 and each output bit of the memory circuit 20, and the output of this OR circuit 24 is supplied to the lamp circuit 6. At all times, each output signal of the latch circuit 17 is a "0" signal (because it is reset by the delay circuit 23).
Each output signal of the memory circuit 20 is supplied to the lamp circuit 6 via the OR circuit 24, and corresponds to the musical tone control switch 10 currently being operated by me.
The LED lights up. On the other hand, when the musical tone control switch 10 is newly operated, each output signal of the switch circuits 7a, 7b, etc.
d ₀ to _{d 4} are read into the latch circuit 17 and supplied to the gate circuit 21 . The output of the latch circuit 17, which is supplied to the gate circuit 21, is periodically and intermittently supplied to the OR circuit 24 according to the output of the pulse generator 26, and as a result, the lamp corresponding to the newly operated tone control switch is turned on. The LED in circuit 6 blinks periodically. This blinking continues for a certain period of time T, and after the certain period of time T has elapsed, it changes to continuous lighting. That is, when a certain period of time T has elapsed and the signal S3 is output from the falling differentiation circuit 22, the output of the latch circuit 17 is read into the memory circuit 20 and supplied to the OR circuit 24, and as a result, the newly manipulated musical tone is Signals d ₀ to _{d 4} corresponding to control switch 10
is continuously supplied to the OR circuit 24 together with the signals d ₀ to _{d 4} corresponding to the previously operated musical tone control switch 10, and thereby the LED corresponding to the newly operated musical tone control switch 10 is supplied to the OR circuit 24.
changes from flashing to continuously lit. Incidentally, after a slight delay from this time, the reset terminal R of the latch circuit 17
The output of the delay circuit 23 is supplied to the latch circuit 1.
7 is reset.

In this way, the gate circuit 21 and the OR circuit 2
4 is a circuit that controls lighting of the LED of the lamp circuit 6. Further, due to the functions of the gate circuit 21 and the pulse generator 26, the LED corresponding to the newly operated tone control switch 10 blinks for a certain period of time T.

FIG. 5 shows the musical tone signal generation circuit 2 in FIG.
FIG. 2 is a block diagram showing the details of the device, in which parts corresponding to those in FIG. 1 are given the same reference numerals. As shown in this figure, the output of the control circuit 4, that is, the output of the memory circuit 20 shown in FIG. 2, is supplied to control circuits 28a, 28b, . . . , respectively. In this case, these control circuits 2
8a, 28b... are all constructed as shown in FIG. That is, a resistor 31 is inserted between input terminals a and b, and terminal 3 of this resistor 31
1a to 31e and output terminal c, respectively.
FETs (field effect transistors) 32a to 32e are inserted, and the gates of these FETs 32a to 32e are connected to terminals _e0 to _e4 , respectively. Signals (outputs of the memory circuit _{20) corresponding to the output signals d0 to d4 of the switch circuits 7a, 7b, . . . shown in FIG. 2 are supplied to} the terminals e0 to e4, respectively. .

The control circuit 28 described above will be further explained by taking as an example the control circuit 28e connected to the output end of the filter 34 for the UK flute 16'. In this case, the output end of the filter 34 is connected to the input terminal a of the control circuit 28e, and the input terminal b is grounded. For example, the control circuit 4
If a “1” signal is supplied only to terminal e ₂ from , and “0” signals are supplied to all other terminals e ₀ , e ₁ , e ₃ , and e ₄ , only FET 32c is in the “on” state. Therefore, the signal obtained at the terminal 31c of the resistor 31 (the signal obtained by dividing the output of the filter 34 by the resistor 31) is sent to the output terminal c via the FET 32c.
is output from. Further, for example, a "1" signal is supplied from the control circuit 4 only to the terminal _e0 , and the other terminals _e1 to
If a “0” signal is supplied to all _e4 ,
Since only the FET 32a is in the "on" state, the output terminal c becomes the ground potential, and the output of the filter 34 is turned "off". In this way, the output level of the filter 34 is adjusted, and as a result, the tone color is changed.

The main parts of the circuit shown in FIG. 5 will be briefly explained below. The tone generator 35 operates based on the clock pulse output from the master oscillator 36.
This circuit generates sound source signals corresponding to the pitches of each key of UKLK and PK. Vibrato control circuit 3
7 is a circuit for frequency modulating the sound source signal generated in the tone generator 35 by periodically changing the oscillation frequency of the master oscillator 36, and adding a vibrato effect to the musical tone signal. delay time) and depth are each controlled by the control circuit 28a.
and 28b. Opening/closing circuit 38
is a circuit consisting of a plurality of variable gain amplifiers (VCAs) or gate circuits corresponding to each key of UK, LK, and PK, and it opens and closes the output (sound source signal) of the tone generator 35 based on the output of the envelope generation circuit 39. At the same time, it adds an amplitude envelope to the sound source signal. In this case, the sustain time of the amplitude envelope is variably controlled separately for UK and LK by control circuits 28c and 28d. The filter circuit 40 is for adding various tones to the above-mentioned sound source signal, and is composed of a large number of filters. A control circuit is provided on the output side of each of these filters to open/close the output of each filter and adjust the level. The voice gate circuit 41 is a circuit that determines whether or not to add a tremolo effect to the UK and LK musical tones, separately for UK and LK and for each tone, and when adding it, the filter circuit 40
The output of is supplied to the UK/LK balance circuit 42,
If not added, the output of the filter circuit 40
UK/LK is supplied to the balance circuit 42, and if not added, the output UK/LK of the filter circuit 40
It is supplied to the balance circuit 43. The UK/LK balance circuits 42 and 43 are both circuits for balancing the UK and LK volume. The tremolo circuit 44 is a circuit that applies amplitude modulation to the musical tone signal and adds a tremolo effect to the musical tone. Further, the reverb circuit 45 is a circuit for adding a reverberation effect to musical tones, and its output is controlled by the control circuit 28m.

As explained in detail above, according to this invention, the output signals of musical tone control switches sequentially operated within a certain period of time are simultaneously outputted to the musical tone signal generation circuit after the specified period of time has elapsed. It is possible to provide an electronic musical instrument in which the musical tone state is simultaneously changed by the musical tone control switch, and is particularly suitable for changing the musical tone state during a performance.

Further, according to this invention, a plurality of display means for displaying the operating status of each musical tone control switch, and a display means corresponding to the newly operated musical tone control switch among the musical tone control switches, are provided. A second control unit that controls the display state to be different between the predetermined time period and after the predetermined time period.
The following effects can be obtained.

Since the control switches that have already been enabled for musical tone control and the control switches that will become effective from now on are displayed in different ways, it is easier for the performer to confirm the control switch.

The performer can be informed of the time (certain time) from when the control switch is newly operated until the operation of the control switch becomes effective, thereby improving the operability of the control switch.

It is possible to prevent the performer from mistaking the fact that the operation of the control switch does not become effective until a certain period of time has elapsed as a malfunction.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an electronic organ that is an embodiment of this invention, FIG. 2 is a block diagram showing details of the tone control switch circuit 3 and control circuit 4 shown in FIG. 1, and FIG. 2, FIG. 4 is a waveform diagram showing signals S1 to S3 in FIG. 2, and FIG. 5 shows details of the musical tone signal generation circuit 2 in FIG. 1. The figure shown in FIG. 6 is a circuit diagram showing details of the control circuit 28 in FIG. 5. 1... Keyboard, 2... Musical tone signal generation circuit, 10...
...musical tone control switch, 18...switch operation detection circuit, 19...timer circuit, 20...memory circuit.

Claims (1)

[Claims for Utility Model Registration] (1) (a) A plurality of musical tone control switches that set and control the state of musical tone generation; (c) a first control means that starts measurement and supplies the outputs of the plurality of musical tone control switches to the musical tone signal generation means after the end of the measurement for a certain period of time; (d) among the musical tone control switches, the display means corresponding to the newly operated musical tone control switch is displayed in different display states during and after the certain period of time; An electronic musical instrument comprising: a second control means for controlling. (2) The first control means includes: (a) switch operation detection means for detecting that any one of the plurality of musical tone control switches has been operated; and (b) a constant control signal based on the output of the switch operation detection means. (c) storage means for inputting the output signals of the plurality of tone control switches and reading and storing the output signals when the timer means finishes measuring a certain period of time; The electronic musical instrument according to claim 1, wherein the output of the storage means is supplied to the musical tone signal generation means. (3) The second control means controls the display means to blink during the predetermined time period, and after the predetermined time period ends, the display means lights up continuously. 1st term or 2nd term
Electronic musical instruments listed in section.