KR790001729B1 - Automatic music playing system - Google Patents

Abstract

A device for playing a desirable melody and, or rhythm by automatically exciting plurality of tone generator ccts. in fixed sequence, was composed of a tempo signal generator (1) (I) for deermining a playing tempc, a devider(2) (II) for deviding an output signals of I, a reset cct. (3) for resetting I and II, a matrix cct.(4) for getting pulse signals from I and II, a manual play switches (5), a tone generator (6) for generating similar sound signals ti base drum, and amplifier for driving a speaker.

Description

Automatic performance device

1 is a convex diagram showing an embodiment of the automatic playing device of the present invention.

2 is a circuit diagram showing an example of a tempo signal generator, a divider, and a negative circuit in the apparatus.

3 is a circuit diagram showing an example of a matrix circuit in the same apparatus.

4 is a truth table showing the operation of the matrix circuit.

Fig. 5 is a circuit diagram showing an example of a passive playing switch circuit and a sound source circuit in the apparatus.

The present invention relates to an automatic playing device which automatically excites a plurality of sound source circuits in a predetermined order and automatically plays a desired rhythm or melody.

The automatic playing apparatus includes a tempo signal generating circuit for determining an automatic playing tempo, a divider for dividing a tempo signal, a matrix circuit for determining an automatic playing rhythm or a melody pattern by inputting a divider output, It consists of a group of sound source circuits which are generated by the output of the matrix circuit and generate the analog sound signal of the base drum electronically, a low frequency amplification circuit that synthesizes and amplifies the output of each sound source circuit, and a speaker driven by the amplification circuit. Many automatic rhythm playing equipment is sold as a bottle.

Such a conventional automatic performance device is complicated, expensive, and can only perform repeated rhythm.

It is a first object of the present invention to provide an automatic playing device in which a manual playing switch, which has not been conventionally lit, is expanded and convenient than the conventional one.

A second object is to provide a simple and inexpensive automatic playing device and to promote its use.

Therefore, low-cost simple matrix circuit, low-cost, wide range of temperature, sound source circuit that produces excellent sound, simple negative circuit, that is, a circuit in which the tempo signal generator and divider are returned so that the rhythm can be played automatically from the first beat. To provide.

Next, an embodiment of the automatic playing device of the present invention will be described as shown.

1 is a block diagram of an embodiment of the automatic playing apparatus of the present invention, wherein (1) shows a tempo signal generating circuit for determining an automatic playing tempo, and (2) shows an output signal of the tempo signal generating circuit (1). A plurality of sub-connected flip-flop dividers for dividing; (3) a return circuit for returning the tempo signal generating circuit 1 and the divider 2; I) a matrix circuit for obtaining a desired pulse signal at the output of i), (5) is a switch circuit group for passive performance, (6) is excited as an output of the matrix circuit 4 and a switch circuit group 5, and the base drum and the like. (7) is an amplifier which synthesizes and amplifies the output signal of each sound source circuit, excites the speaker 8, and generates a rhythm sound.

This configuration provides an automatic player that can automatically play a constant rhythm as in the prior art, and can play a desired rhythm manually and, moreover, can remove a desired sound source circuit from the automatic player. .

2 shows a specific circuit example of the tempo signal generating circuit 1, the divider 2, and the return circuit 3. As shown in FIG.

The tempo signal generation circuit 1 is a known unstable multivibrator composed of transistors TR ₁ , TR ₂ , resistors R ₁ to R ₉ , capacitors C ₁ , C ₂ , and diode D ₁ , and has an oscillation frequency. In other words, the tempo is configured to be variable by operating the resistor R ₂ .

21 is a known bistable multivibrator composed of transistors TR ₃ , TR ₄ , resistors R ₁₁ to R ₁₇ , and capacitors C ₄ to C ₆ , that is, an unstable multivibrator 1 with a flip-flop circuit. Is driven through a capacitor C ₄ at the collector of transistor TR ₂ .

(22), (23), and (24) have the same circuit configuration as the flip-flop circuit 21, and are driven by the outputs of the flip-flop circuits 21, 22, and 23, respectively.

To the common capacitor C ₃ connected between the emitter and thead such as the transistors TR ₂ and TR ₄ constituting the multivibrator 1 and the flip-flop circuits 21, 22, 23, and 24. The return circuit 3 is constituted by a series circuit between the resistor R ₁₀ and the switch Sw connected in parallel. The operation of the switch Sw will be described.

In the state where Sw is closed, the unstable multivibrator 1 and the flip-flop circuits 21, 22, 23, and 24 all operate in a normal manner to perform oscillation and division operations.

In this state, if the switch SW is opened now, the transistors TR ₂ and TR ₄ constituting the unstable multivibrator 1 and the flip-flop circuits 21, 22, 23, and 24, etc. emitter is so de eoeo by showing only the capacitor C ₃ the transistor TR _2, TR _4, and the emitter voltage is increased, such as, the transistor TR _2, TR ₄ and the like are all returned to the state of OFF.

After the transistors TR ₂ , TR _4, etc. return to the OFF state, when the switch Sw is closed again, the charge accumulated in the capacitor C ₃ is discharged through the resistor R ₁₀ , the switch Sw, and the transistors TR ₂ , TR The emitter voltages such as ₄ return to the normal state, and the unstable multivibrator 1 and the flip-flop circuits 21, 22, 23, and 24 start normal operation. In addition, when the switch Sw is closed, the multivibrator 1 and the flip-flop circuit 21 are caused by large time constants due to the capacitor C ₃ and the resistor R ₁₀ even when chattering of Sw occurs. It does not affect the operation of) ~ (24).

Fig. 3 shows a specific circuit example of a matrix circuit for automatically playing each rhythm of marching music, waltz, foxtrot, and lock using respective sound source circuits that generate bass drum sounds, snare drum sounds, and cymbal sounds. .

……e,

의 기호는 제 2 도의 무안정 멀티바이브레이터(1)의 TR₂의 콜렉터에 생기는 펄스 a, 플립플롭회로(21)의 TR₃의 콜렉터에 생기는 펄스

, TR₄의 콜렉터에 생기는 펄스 b, 마찬가지로 플립플롭회로(22), (23), (24)의 출력펄스 c,

, d,

, e,

를 표시하고 있다.In the drawings a, b,

… … e,

Is a pulse generated in the collector of TR ₂ of the unstable multivibrator 1 of FIG. ₂ and a pulse generated in the collector of TR ₃ of the flip-flop circuit 21.

, Pulse b generated in the collector of TR ₄ , the output pulses c of the flip-flop circuits 22, 23, and 24,

, d,

, e,

Is displayed.

The matrix circuit 4 is a plurality of no circuits consisting of resistors R ₁₈ to R ₃₉ , rhythm selection switches S ₁ to S ₅ , and transistors TR ₅ to TR ₈ , and resistors R ₄₀ to R ₄₂ and capacitors C ₇ to C _9. And a differential circuit consisting of diodes D ₂ to D ₄ , and (6) is excited to the output of each differential circuit.

A sound source circuit group including sound source circuits BD, SD, and CY for generating a bass drum sound, a snake sound, and a cymbal sound is shown.

It is now assumed that the rhythm selector switches S ₁ to S ₅ that interlock with each other are inserted into the fixed terminal 1.

인 펄스가 인가된다.In this case, via the switch S ₁ and the resistors R _18- R ₂₀ at the base of the transistor TR ₅ , respectively.

In pulse is applied.

인 분주기(2)의 출력펄스가 동시에 저음 레벨로 되었을 때에만 OFF하게 되는 것이다.So this transistor TR ₅

It turns off only when the output pulses of the phosphorus divider 2 become the bass level at the same time.

인 분주기(2)의 출력펄스 중 어느 하나가 고음 레벨의 상태에 있으면, 상기 트랜지스터 TR₅는 ON의 상태에 있다. TR₅의 콜렉터에 생기는 신호를 논리변수 X로 하고, TR₅가 OFF일 때, 즉, 콜렉터가 고음 레벨일 때, X=1, TR₅가 ON일 때, 즉, 콜렉터가 저음 레벨일 때, X=0,

도 각각이 고음 레벨일 경우를 논리치 1, 저음 레벨을 논리치 0으로 하면, 전술의 동작은

즉, 노오논리식으로 표시된다. 이것은, De. MORGAN의 정리(定理)에서, X=bcd로 표시되는 앤드회로와 등가(等價)가 된다.In other words

When any one of the output pulses of the phosphorus divider 2 is in the high sound level state, the transistor TR ₅ is in the ON state. When the signal generated at the collector of TR ₅ is the logical variable X, when TR ₅ is OFF, that is, when the collector is at the high level, when X = 1, when TR ₅ is ON, that is, when the collector is at the low level, X = 0,

When each of the diagrams has a high tone level and a logic value 1 and a low tone level as a logic value 0, the above-described operation

That is, it is represented by a no logic expression. This is De. In the MORGAN theorem, it is equivalent to the end circuit represented by X = bcd.

At the moment when transistor TR ₅ turns from OFF to ON, a differential circuit consisting of resistor R ₄₀ , capacitor C ₇ , and diode D ₂ acts, and a negative pulse appears at the output terminal thereof to generate a bass drum sound. The sound source circuit BD is excited.

, d인 분주기(2)의 출력펄스가 인가되어 있기 때문에, 이 트랜지스터 TR₆은

, d인 출력펄스가 동시에 저음 레벨로 되었을 때에만 OFF하는 것이 된다.In addition, when the transistor TR ₆ is considered, the base is provided with the resistors R ₂₄ and R ₂₅ interposed therebetween.

Since the output pulse of the divider 2 of d is applied, the transistor TR ₆

This signal is turned off only when the output pulse at d is at the same time as the low level.

However, since the transistor TR ₆ is connected in series with the transistor TR ₇ , the collector voltage reaches the + B potential when the transistor TR ₇ is OFF even when the transistor TR ₈ is ON.

In other words, when either of the transistors TR ₆ and TR ₇ is OFF, the collector voltage of TR ₆ becomes a high-pitched level, which constitutes a logic sum circuit.

However, when connecting the switch S ₁ ~ S ₅ to the fixed terminal (1), since the base of the transistor TR ₇ is connected to the + B power source via a switch S _4, resistor R _26, the transistor TR ₇ is always ON After the transistor TR ₆ is turned off, the pulse of negative voltage appears in the differential circuit consisting of the resistor R ₄₁ , the capacitor C ₈ , and the diode D ₈ only when the transistor TR ₆ is turned off again. The sound source circuit SD is excited.

인 분주기(2)의 출력 펄스가 베이스에 인가되어,

인 출력펄스가 저음 레벨로 되었을 때, 트랜지스터 TR₈이 OFF하고, 트랜지스터 TR₈이 OFF된 후 재차 ON하는 순간에 저항 R₄₂, 콘덴서 C₉, 다이오우드 D₄로 되는 미분회로에서 부의 펄스가 나타나, 심벌즈음을 발생하는 음원회로 CY가 여기된다.In addition, when the transistor TR ₈ is considered, the switching switch S ₆ and the resistor R ₃₄ are interposed.

The output pulse of the phosphorus divider 2 is applied to the base,

When the output pulse reaches the low level, the transistor TR ₈ is turned off and a negative pulse appears in the differential circuit consisting of the resistor R ₄₂ , the capacitor C ₉ , and the diode D ₄ the moment the transistor TR ₈ is turned off and then turned on again. The sound source circuit CY which generates a cymbal sound is excited.

In this way, when the switching switches S ₁ to S ₅ are input to the fixed terminal 1, the sound source circuits BD, SD, and CY that generate the bass drum sound, the snake sound, and the cymbal sound are respectively represented by the following logical expression (1). The output indicated by the excitation signal is excited as a differential pulse at the instant of the change from the high level to the low level, and the rhythm of the marching song is automatically played as shown in the truth table of FIG.

When the fixed terminals (2), (3), and (4) are inserted in the switching switches S ₁ to S ₅ , the outputs represented by the following logic expressions (2), (3), and (4) are similarly high. It is excited as a differential pulse of the moment when it changes from a level to a bass level, and as shown in the truth table of FIG. 4, rhythms of waltz, foxtrot, and lock are automatically played.

는, 전술과 같이 구체적인 예의 회로의 논리동작에 대응하고, 앤드논리표현식, 예를 들면, (1)의 SD,

는, 진리표 제 4 도에서 용이하게 알 수 있는 것이다.In addition, in the logical formulas (1) to (4), the no logic expressions enclosed by equal signs, for example, SD of (1),

Corresponds to the logical operation of the circuit of the specific example as described above, and the AND logic expression, for example, SD of (1),

Is easily seen in the fourth table of the truth table.

The conversion of no logic expressions and AND logic expressions is based on De Morgan's theorem in the BOOI algebra, as is known.

If the matrix circuit is realized by the combination of the above-described resistors and the NOR circuit by the transistor and the OR circuit by the series connection of the transistors, rather than the conventional end-or circuit by the diode as in this embodiment, By the amplification of the transistors in the NOR circuit, the amplification waveform shaping circuits required in the diode and OR circuits become ineffective, thereby simplifying the circuit configuration.

Next, a specific circuit example of the passive performance switch circuit group 5 and the sound source circuit group 6 will be described with reference to FIG.

The switch circuit group 5 has a plurality of switch circuits corresponding to the respective sound source circuits, and each switch circuit is configured as shown in Fig. 5 (BD) in FIG.

That is, in FIG. ₅ , the transistors TR ₅ , the resistors R ₃₇ , R ₄₀ , the diode D ₂ , and the capacitor C ₇ are a part of the matrix circuit 4, the base drum is the excitation portion of the sound source circuit, and the same symbols as in FIG. 3 are given. It corresponds to the part that became. (5) (BD) is a switch circuit for manual playing of the base drum, which is composed of a resistor R ₄₁ , a capacitor C ₁₀ and a push button switch S ₆ .

(6) (BD) is a part of the sound source circuit group 6 and a bass drum sound generating circuit. The operation of the manual play switch circuit will be described.

When the manual play switch S ₆ is in the OFF state, a negative differential pulse is generated from a differential circuit consisting of a capacitor C ₇ and a resistor R ₄₀ connected to the collector of TR ₅ as soon as the transistor TR ₅ changes from OFF to ON. The sound source circuit 6 (BD) is determined via the diode D ₂ . That is, the sound source circuit 6 (BD) is driven at the excitation timing determined by the matrix circuit 4, and autoplay is performed.

Next, assuming that the manual playing switch S ₆ is kept ON, the differential pulses of ON and OFF of the transistor TR ₅ shown at the connection point of the resistor R ₄₀ and the capacitor C ₇ are obtained by the resistor R ₄₀ and the capacitor C _7. one end of the switch circuit capacitor C ₁₀ and the capacitor C ₁₀ of a connected to the connection point between the disposed of is absorbed by the switch S ₆ is connected between eoeo dE, via the diode D ₂ that excites the tone generator (6) (BD) Loss of strength That is, if the switch S ₆ is kept in the ON state, the sound source circuit will not operate even if there is an excitation signal of the sound source circuit in the matrix circuit.

Next, a description will be given of the case where the passive performance switch S ₆ is momentarily turned on when the transistor TR ₅ is in an ON or OFF state.

If the transistor TR ₅ is kept ON or OFF, the potential of the connection point between the resistor R ₄₀ and the capacitor C ₇ is at approximately + B power supply voltage. Therefore, when the manual play switch S ₆ is momentarily turned ON and OFF, The differential pulses are generated at the connection point between the resistors R ₄₀ and the capacitors C ₇ and C ₁₀ by the capacitors C ₁₀ , R ₄₀ , and R ₄₁ , and the negative pulse causes the sound source circuit (6) to pass through the diode D ₂ . (BD) is excited to generate a bass drum sound.

That is, a predetermined sound can be generated by the ON-OFF operation of the manual play switch S ₆ .

For convenience of explanation, the case where TR ₅ is kept in the ON or OFF state has been described. However, the operation is similarly performed during automatic performance.

The passive playing switch circuit for the sound source circuit for generating the snare drum sound and the cymbal sound has the same configuration and operation as for the sound source circuit for generating the bass drum sound described above.

Next, a specific circuit example of the sound source circuit 6 is shown in FIG. Here, an example of the bass drum sound generating circuit is shown.

TR ₉ is an oscillation transistor, the collector is connected to the + B power supply via the resistor R ₄₄ , and the emitter is introduced via the variable resistor R ₄₉ .

TR ₁₀ is the emitter resistance eoeo de soon as via the R ₄₇ is connected at the same time, the base of the transistor TR _9, the collector is connected directly to the B + power supply to the transistor and the temperature compensation, impedance transformation of the TR _9.

And the capacitor C _11, C ₁₂ connected in a resistor R _45, R ₄₆ in series connected in series between the transistor TR ₉ of the collector and the transistor TR ₁₀ base are connected in a state of being connected in parallel with each other, the resistance R _45, It is via the connection point to the R ₄₆ and capacitor C _13, resistor R ₅₀ is connected to a + B. In other words, the connection points of the resistors R ₄₅ , R ₄₆ , and R ₅₀ capacitors C ₁₁ , C ₁₂ constitute a known pair T circuit as the capacitors C ₁₁ , C ₁₂ , C ₁₃ , respectively.

The excitation pulse of this sound source circuit is applied to the connection points of the resistors R ₄₅ and R ₄₆ via the diode D ₂ .

Operationally, the transistors TR ₉ and TR ₁₀ are normally in the ON state, but when a negative pulse is applied to the connection points of the resistors R ₄₅ and R ₄₆ , the transistor TR ₁₀ is first turned off.

When the transistor TR ₁₀ is turned off, the emitter potential is lowered, and the transistor TR ₉ is turned off.

When transistor TR ₉ is turned off, its collector potential rises to turn transistor TR ₀ on.

When transistor TR ₁₀ is turned on, the emitter potential rises, and transistor TR ₉ is turned on.

When TR ₉ is turned on, the collector potential of TR ₉ is lowered, and the transistor TR ₁₀ is turned off.

By repeating this cycle, the sound source circuit attenuates and oscillates until energy decays.

Damping the oscillation duration, is determined by the loop gain of the circuit is adjusted by the variable resistance R _49.

The oscillation frequency is determined by the method of selecting the constant of the pair T circuit connected between the collector of the transistor TR ₉ and the base of the transistor TR ₁₀ . The output of this sound source circuit is taken out of the emitter of the transistor TR ₉ , added to the low frequency amplifier, and the speaker is driven to obtain a bass drum sound.

In this sound source circuit, the oscillation frequency is adjusted according to the constant of the pair T circuit by adjusting the decay time by setting the emitter resistance R ₄₉ of the transistor TR ₉ . Sound source circuit can be designed to generate the tone of

을 얻었다.According to the experiments of the inventors, as described above, the method of applying negative differential pulses to the connection points of the resistors R ₄₅ and R ₄₆ has excellent pseudo sound without a click sound.

Got.

In the case where it is preferable to mix click sounds, negative or positive differential pulses may be applied to the base of the transistor TR ₁₀ or the like.

This sound source circuit may be applied as a substitute for the bell of an alarm clock besides an automatic playing device.

Since the snade sound, the cymbal sound generation circuit, and the low frequency amplifier are well known, specific examples are omitted.

As described above, according to the present invention, it is possible to play a favorite rhythm freely with a manual switch, and to enjoy the variation while mixing or erasing the snare drum sound during the automatic performance of the lock and the like. It is possible to provide an automatic playing device.

Claims (1)

A tempo signal generator that determines the tempo of a known auto-playing rhythm, and a divider that divides the output pulse of the tempo signal generator and an output of the divider as inputs, and outputs a signal that excites a plurality of sound source circuits in a predetermined pattern. A matrix circuit comprising: a plurality of passive source switch circuits, a matrix circuit, and a plurality of sound source circuits for generating a pseudo drinking signal such as a base drum with signals from the switch circuit, and amplifying the output of the sound source circuit to drive the speaker Amplifier, and an automatic playing device with a speaker.

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