JPS602672B2 - Musical sound signal opening/closing circuit for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an electronic device that can be used to selectively generate a desired musical tone corresponding to a foot key by pressing a lower key based on the operation of a single note priority selection switch circuit. This invention relates to musical tone signal opening/closing circuits for musical instruments.

Regarding keyboard instruments, for example, if we distinguish between electronic organs and non-electronic organs, electronic organs have upper keys,
The difference is that non-electronic organs typically have a lower key and foot keys, whereas non-electronic organs only have one keyboard, and as a result, electronic organs have a greater variety of performance effects than non-electronic organs. It is well known that it is possible to obtain However, for non-electronic organ specialist performers who operate only one keyboard, it is nearly impossible to operate an electronic organ that has two keyboards and foot keys without special training. The present invention has been made, for example, in view of the above-mentioned circumstances, and its purpose is to:
It can be used so that a desired single note of the musical tone corresponding to the pressed lower key and foot keys can be produced by only pressing the lower key, and thereby the performance operation on the lower keyboard can be used to perform the performance operation using the foot keys. To provide a musical tone signal opening/closing circuit for an electronic musical instrument, which can obtain the same performance effect as when playing an electronic musical instrument, and allows even a performer specializing in non-electronic musical instruments to easily play the electronic musical instrument with its own accompaniment effect. It is in.

The present invention will be explained in detail below using specific examples.

In FIG. 1, 1 to ln are n lower key switches provided corresponding to, for example, each of the n keys on the lower keyboard and closed in conjunction with the pressing operation of each key; ,2,
2n-,. , . . . , 2n are key switches for 12 foot keys, which are closed in conjunction with the depression of each of the 12 foot keys in the octave, for example. Reference numerals 3 and 4 denote two sets of first and second key signal receiving circuits each including a distribution circuit and a musical tone gate circuit, which will be described later.

5 is a first clock signal generator that generates clock signals ◇, to ◇n and JR having mutually different phases as shown in FIG. The signals are supplied to the input sides of switches 1 to ln, respectively.

6 is the clock signal ◇, to ◇n, gn−, 2,
? n-,.・・・◇A second clock signal generator that generates the same clock signal as each of
2n to 2n input sides, respectively.

The output sides of the key switches for the lower keys, through ln, are commonly connected in the first switch output circuit 7 and then connected to the input terminal 9 of the first key signal receiving circuit 3 via one transmission line 8. Similarly, each foot key switch 2
After connecting the output sides of 2 to 2n in common to the second switch output circuit 1, connect this to one transmission line 1.
It is connected to the input terminal 12 of the second key signal receiving circuit 4 via. Reference numeral 13 denotes a distribution circuit provided in the first key signal reception signal circuit 3, which is used to distribute n AND circuits 14 to 14n corresponding to the lower key switches to ln, respectively.
One input side of each is commonly connected to the input terminal 9, and the other input side receives a distribution signal P having the same frequency and phase as the clock signals ◇, to n.
, to Pn are supplied correspondingly.

The output signals of the AND circuits 14, to 14n are 0, and the clock signals ◇ to ? n is supplied as a switch signal to each of the n opening/closing circuits 16, to 16n provided corresponding to the key switches for valley keys, to ln, through each of the first rectifier circuits 15, to 15n, respectively. It looks like this. These switching circuits 16, 16
n constitutes the first musical tone gate circuit 17 as a whole, and a musical tone signal corresponding to the lower key is supplied to each musical tone signal input terminal from a musical tone signal source (not shown). And each opening/closing circuit 16, to 16n
A set of musical tone signals supplied individually to 4 feet f4,
It consists of three musical tone signals: 8 feet f8 and 16 feet f,6. T,,T,... are the first signal receiving circuit 3
A plurality of first musical tone signal output terminals are provided in the first musical tone signal output terminals, each set of which consists of three terminals, and three musical tone signals f4, f8, f output from each of the switching circuits 161 to 16n.
, 6 are connected to each set of musical tone signal output terminals T, , T. . . . The output is appropriately distributed and output so that it is common to multiple sets. The second key signal receiving circuit 4 also has a second key signal receiving circuit 4. It has the same configuration as the first key signal receiving circuit 3. That is, 18 is a second distribution circuit consisting of one pair of AND circuits 19n-, 2 to 19n provided corresponding to each foot key switch 2n-8 to 2n, and each of the AND circuits 19n-, 2 to 1
9n are commonly connected to the input terminal 12, and the other input terminal is connected to the distribution signal P.9n. PnH.2, Pn-, . . . , Pn of Pn are supplied in correspondence with each other. 20n-,2
20n to 20n are rectifier circuits similar to those described above, and 21 is a second musical tone gate circuit, which is comprised of opening/closing circuits 22n-, 2 to 22n similar to those described above provided corresponding to each foot key.

T2, T2... are second musical tone signal output terminals.
and the first musical tone signal output terminals T,,T,...
The musical tone signal outputted to is transmitted to each tone circuit for the lower key, and is also transmitted to the second musical tone signal output terminals T2, T2...
The musical tone signals output from ... are transmitted to each tone circuit for the foot keys. Said second musical tone gate circuit 2
The musical tone signal supplied to each opening/closing circuit 22n-, 2 to 22n of the first musical tone gate circuit 17 has a tonal range that spans several bass areas and several tones lower than this. For example, a base green light with one needle solid. 23 is a single tone priority selection switch circuit for giving priority to only one specific clock signal among the plurality of clock signals outputted to the transmission line 8 and supplying it to the input terminal 12 of the second key signal receiving circuit 4; be.

This single note priority selection switch circuit 23 includes a flip-flop circuit 24, one selection switch 25 is connected between the set input terminal S and the transmission line 8, and the reset input terminal R receives a first clock signal. The generator 5 is configured to supply the IJ set signal JR as shown in FIG. 2, which is generated one pulse ahead of the clock signal ◇ of the earliest phase. Then, the output terminal of the flip-flop circuit 24 is connected to another transmission line 11' via a waveform shaping circuit 26.
Connect this. Next, the operation of the above configuration will be explained using an example in which the selection switch 25 is in an open state.

When one lower key is depressed (normally three lower keys are operated at the same time since it is for playing chords), the corresponding lower key key switch 12 is closed, and the key switch 12 for the lower key is closed. The clock signal ◇2 is the first switch output circuit 7,
The signal is transmitted to the input terminal 9 of the first key signal receiving circuit 3 via the transmission line 8, and is also commonly supplied to one input terminal of each AND circuit 14, to 14n of the first distribution circuit 13. Here, the clock signal ◇2 is the AND circuit 142
, the signal is synchronized with the distribution signal P2 which is in a synchronous relationship, and is connected to the opening/closing circuit 162 corresponding to the closed lower key key switch 12 in the first musical tone gate circuit 17 via the rectifying circuit 152. It is distributed and supplied as a switch signal. As a result, the opening/closing circuit 162 conducts the internal musical tone signal transmission path to pass the musical tone signal corresponding to the operated lower key to the first musical tone signal output terminals T, , T.・
... Output to the corresponding one. The same applies when the foot key is pressed down. That is, when, for example, the foot key switch 2n is closed by pressing down one foot key, the clock signal n indicates the foot key switch 2n,
Second switch output circuit 10, transmission line 11, input terminal 1
2. AND circuit 19 of second distribution circuit 18 River rectifier circuit 2
0n, and is supplied to the opening/closing circuit 22n in the second tone gate circuit 21 as a switch signal corresponding to the closed foot key switch 2n. As a result, the musical tone signal corresponding to the pressed foot key is output as a base blue signal to the corresponding second musical tone signal output terminal T2 via the opening/closing circuit 22n, and this is further outputted via the tone circuit for the foot key. is given to the speaker. By keeping the selection switch 25 open in this manner, accompaniment performance using chords can be performed using the lower keys, and accompaniment performance using bass notes can be performed using the foot keys. Next, the case where the selection switch 25 is closed will be explained.

In this state, the flip-flop circuit 24 is always in a reset state due to the periodically generated reset signal OR, so in order to add a chord accompaniment effect, the three lower keys are pressed simultaneously. As a result, for example, if the lower key switch ln-, 2, ln-, o, 1'8 is closed, the clock signal shown in FIG. 2? n-, 2,
? n-.o, ◇cape are transmitted to the first key signal receiving circuit 3 via one transmission line 8 and also supplied to the set input terminal of the flip-flop circuit 24 via the selection switch 25. Therefore, in the first key signal receiving circuit 3,
Since this is the same configuration as in FIG. 1, a chord signal is output, while the flip-flop circuit 24 receives a clock signal ◇n.
‐, 2, ◇n‐, o, man n‐8, it is triggered preferentially by the clock signal gn‐, 2 (corresponding to the three middle and high tones) which is phase-leading and enters the set state. Turn over,
Thereafter, the process of returning to the reset state at the time when the reset signal OR is generated is repeated periodically. Therefore, the output S, becomes a signal with the same frequency and the same phase as the clock signal ◇n-,2, as shown in FIG. 2, and is supplied to the other transmission line 11 as an output S2 having the same waveform as 2. Is this world power S2 a clock signal? n-
, 2, and corresponds to its reproduction, so
When this is supplied to the second key signal receiving circuit 4, a second musical tone is generated in the AND circuit 19n-, 2 by the distribution signal P◇n-, 2 which is synchronized with the clock signal 0n-, 2 following the output S pattern. Opening/closing circuit 22n-, 2 in gate circuit 21
Here, this switching circuit 22n-, 2 and therefore n
-, The musical tone signal corresponding to the second foot key is transmitted to the second musical tone signal output terminal T2, and further transmitted to the tone circuit for the foot key, and a single tone corresponding to the foot key is generated as a base sound from the speaker. It is something that Therefore, in this case, at the same time as the chord is sounded, the bass note is also selected as a single note and is sounded. As described above, the present invention divides a large number of musical tone gate circuits that take out musical tone signals separately into those for the lower key and for the foot keys, and also uses the clock signal output from the switch output circuit based on key operation to control the key. A large number of distribution circuits for selecting the tone gate circuits corresponding to the above are also divided into those for the lower key and those for the foot keys, and the distribution circuits are connected between the lower key side switch output circuit and the foot key side distribution circuit. A single note priority selection switch for giving priority to only one specific clock signal out of a plurality of clock signals output from the switch output circuit on the lower key side and supplying it to the distribution circuit and musical tone gate circuit on the foot key side. The feature is that a circuit is provided.

As a result, according to the present invention, when the single note priority selection switch circuit is disabled, normal performance using the lower key and foot keys can be performed, whereas the switch circuit is enabled. In this case, if you select multiple notes such as chords using the lower key, the specific single note corresponding to the foot key will also be selected at the same time, so you can obtain the same accompaniment effect by operating only the lower key as if you operated the foot keys at the same time. be.

Therefore, even though only the lower keys are operated, a more realistic accompaniment effect can be expected. As a result, even a performer specializing in non-electronic organs can easily perform performances with accompaniment effects unique to electronic organs by operating the electronic organ on a single keyboard.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a musical tone signal opening/closing circuit of an electronic musical instrument showing an embodiment of the present invention, and FIG. 2 is a waveform diagram of a clock signal and a signal at a specific portion used in the first embodiment. In the figure, 1 to ln are the key switches for the lower keys, 2n-, 2 to 2n are the key switches for the foot keys, 3 and 4 are the first and second key signal receiving circuits, respectively, and 5 and 6 are the first and second key signal receiving circuits, respectively. 2 clock signal generator, 7 is the first switch output circuit, 8 is the transmission line, 9 is the input terminal, 10 is the second switch output circuit, 11 is the transmission line, 12 is the input terminal, 13 is the first distribution circuits, 14L and 14n are AND circuits, 15 and 15n are rectifier circuits, 16 and 16n are switching circuits, 1
7 is the first musical tone gate circuit, 18 is the second distribution circuit, 1
, 9n-, 2 to 19n are AND circuits, 20n-, 2 to 20n are rectifier circuits, 21 is a second tone gate circuit, 2
2n-, 2 to 22n are open/close circuits, 23 is a single tone priority selection switch circuit, 24 is a flip-flop circuit, 25 is a selection switch, 26 is a waveform shaping circuit, T is the first musical tone signal output terminal, and T2 is the second tone signal output terminal. The musical tone signal output terminals M, to)n are clock signals, P to Pn are distribution signals, and JR is a reset signal. Figure 1 Figure 2

Claims (1)

[Claims] 1. A plurality of key switches 1 and 2 that are linked to the pressing operation of each key on the keyboard, and a clock signal generator 5 for supplying clock signals φ having mutually different phases to the input sides of the key switches 1 and 2, respectively. 6, and a switch output circuit 7 formed by commonly connecting the output sides of the plurality of key switches 1 and 2.
.
Distribution circuits 13 and 18 that distribute using a distribution signal P synchronized with the distribution signal P and use this as a switch signal for each key, and the distribution circuit 1
Musical tone gate circuits 17 and 21 that take out musical tone signals corresponding to each key separately by switch signals corresponding to each key from 3 and 18, and musical tone gate circuits 17 and 21 for supplying musical tone signals to the musical tone gate circuits 17 and 21. In the musical tone signal opening/closing circuit for an electronic musical instrument comprising a signal source, the distribution circuit 13,
18 and tone gate circuits 17, 21 are provided for the lower key and the foot key, and between the switch output circuit 7 on the key side and the distribution circuit 18 on the foot key side, the lower key side The clock signal φ1 of the earliest phase is output from the clock signal generator 5 of
The flip-flop circuit 24 is reset by the reset signal φR outputted one pulse in advance of the flip-flop circuit 24, and is reset by the clock signal φ outputted first from the switch output circuit 7 on the lower key side after the reset. A waveform shaping circuit 26 which is connected to the flip-flop circuit 24 and shapes the output signal S1 of the flip-flop circuit 24 into an output signal S2 having the same waveform as the clock signal φ synchronized with the rising edge of the output signal S2, and supplies it to the distribution circuit 18 on the foot key side.
A musical tone signal opening/closing circuit for an electronic musical instrument, characterized in that a single note priority selection switch circuit 28 is provided.