KR850002188Y1 - Rhythm generator - Google Patents

Abstract

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Description

Rhythm Generator

1 is a schematic diagram of a conventional rhythm generator.

2 is a circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

1: Rhythm selector 2: Rhythm pattern generator

3: sound source generator al-Cn: sound source generator circuit

11: rhythm selector matrix part 12: microcomputer

13: division latch circuit 14: speech synthesis memory device

15: decoder 16: unvoiced sound generating device

17: periodic impulse generator 18: L-type grid network

19: digital / analog converter 20: audio signal amplification circuit

21: rhythm speed control circuit 22: playing speed display circuit

The present invention relates to a rhythm generator using a speech synthesizer.

The conventional rhythm generator has a form as shown in FIG. 1, and the operation is performed as follows.

That is, when the rhythm to be generated as the rhythm selection key 1 is selected, the rhythm pattern generator 2 finds the pulse pattern in the internal ROM according to the key selection of the front end and transfers it to the sound source generator 3. do.

Here, the pulse pattern refers to a formal pattern of driving pulses for operating each sound source generator circuit (al-Cn) of the sound source generator 3 prepared for each sound of the instrument to generate the rhythm selected in the front end. The pulse patterns drive the circuits necessary for the generation of the selected rhythm among the sound source generating circuits (al-Cn) with unique periods depending on the type of rhythm (eg, waltz, disco, samba, etc.). The signal of the sound source generation circuit which is selected and driven is applied to the amplifier A ₁ and amplified and then output through the speaker SP ₁ .

In the conventional rhythm generator according to the above process, in order to obtain a desired sound source, the rhythm pattern for each instrument must be stored in a memory circuit in a pulse pattern.

Therefore, for the rhythm composed of complex musical instruments, the memory capacity must be increased in proportion. If you reduce the number of sound source generators (al-Cn) to reduce memory capacity, you will not get a vivid rhythm, but only a simple sound source. You get a sound source.

In addition, even if the sound source generator circuit al-Cn is increased, there are some limitations to reproduce the original rhythm sound source vividly because what is obtained therein is generated in combination with each other so as to be close to a desired sound source.

The present invention is an improvement of the conventional rhythm generator, and the excessive amount of storage capacity of the rhythm pattern generator 2 using the speech synthesis memory device, the mass installation of a complex sound generator (al-Cn), an unnatural sound source It is to solve the problems such as the reproduction of the sound wave and to easily generate a sound close to the original sound source by a relatively simple circuit configuration.

Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.

The present invention connects the microcomputer 12 to the output terminal of the rhythm selection key matrix unit 11, and the split latch circuit 13, the speech synthesis memory 14, and the decoder 15 to the output terminal of the microcomputer 12. Are connected in turn, and an unvoiced sound generator 16 and a periodic impulse generator 17 are installed on one side of the decoder 15 to connect the L-type lattice network 18, and to the rear end of the L-type lattice network 18. The digital / analog converter 19, the audio signal amplifying circuit 20, and the speaker SP ₂ are sequentially connected, and at the input end of the division latch circuit 13 described above, a capacitor C ₁ and a variable resistor VR _{1 are connected.} Rhythm speed control circuit 21 is provided, and the play speed display circuit 22 is provided on one side of the control line CTL ₁ of the decoder 15.

Reference numeral INV ₁ denotes an inverter, D ₁ denotes a data bus line, and A ₁ and A ₂ denote address bus lines.

2 is a circuit diagram of the present invention having the above-described structure. When a user presses a key of a desired rhythm on a rhythm selection key matrix 11 for selecting a rhythm, a selection signal is applied to the microcomputer 12. The microcomputer 12 finds the start address of the ROM for the selected rhythm sound and applies it to the division latch circuit 13, at which time the signal path becomes the address bus line A ₂ .

At the same time, the control signal indicating the start of the speech synthesis operation is applied to the divided latch circuit 13 and the speech synthesis storage device 14 via the control line CTL ₂ .

In the above-described divided latch circuit 13, the start address is received and latched, and then transferred to the speech synthesis memory 14 through the address bus line A ₁ .

The speech synthesis storage 14 transfers the data of the musical instrument rhythm sound stored at the input address to the decoder 15 in accordance with the ROM clock pulses. The signal path at this time is the data bus line D ₁ . After analyzing the input data, the decoder 15 selects a filter to pass each sound according to the coefficient of the corresponding voice zone, and generates a periodic impulse generator 17 when the analyzed sound is voiced sound. By changing the period of the impulse, the height of the sound is determined, and in the case of the unvoiced sound, the unvoiced sound generator 16 selects each to generate unvoiced sound.

Each sound source generated in this way is transmitted to the L-type lattice network 18 composed of a plurality of digital lattice filters, and the rhythm sound source synthesized in the L-type lattice circuit 18 is transmitted to the digital-to-analog converter 19. .

In the digital / analog converter 19, the audible sound is reproduced in the speaker SP ₂ by converting the digital rhythm sound source of the front end into a speech synthesis waveform, which is an analog signal, and applying this waveform to the speech signal amplification circuit 20.

In order to continuously repeat the rhythm generated through the above process, the decoder 15 detects when the data of the selected rhythm ends and transmits an end signal to the microcomputer 12 through the control line CTL ₁ , The computer 12 returns all conditions to the first address of the selected rhythm so that the selected rhythm continues to be played back repeatedly. This repetitive operation continues as long as the key selection of the rhythm selection key matrix section 11 is not changed.

Also, while the rhythm is reproduced, the control line (CTL ₁₎ of the inverter (INV ₁₎ outputs of the high level and the play speed display circuit 22 does not light up the indicator (LED ₁₎ because a low level, the reproduction If the end has a control line (CTL ₁₎ therefrom, so as right level is formed in the base of the transistor (TR ₁₎ and the potential of high level, yiettara transistor (TR ₁₎ displays because the conduction (LED ₁₎ and so on (LED ₁₎ Lights up. That is, the indicator (LED ₁ ) is turned on just before the end of the rhythm playback or enters the repetitive state, so that the player can sense the operation state and the playing speed of the present invention.

In addition to the above-described functions of the operation unit, the rhythm speed control circuit 21 may control the regeneration speed of the rhythm. When the oscillation circuit consisting of the capacitor C ₁ and the variable resistor VR ₁ is varied, the split latch circuit 13 This variable signal is transmitted as the central processing unit clock signal of the microcomputer 12 and the ROM clock signal of the voice synthesis storage device 14.

Therefore, since the period of the rhythm to be reproduced changes, the user can easily match the rhythm speed of the present invention with the playing speed of the user.

As described above, the present invention solves reproblems such as the excessive use of the memory capacity, the increase of the sound source generation circuit, and the generation of unnatural rhythms of the conventional apparatus by effectively using the speech synthesis apparatus.

In addition, it has the advantage that the installation speed of the display device 22 and the rhythm speed control circuit 21 can be installed to facilitate the use of the player.

Claims (1)

(Correct) The microcomputer 12 is connected to the output end of the rhythm selection key matrix unit 11, and the split latch circuit 13, the speech synthesis storage device 14 and the decoder 15 are connected to the output end of the microcomputer 12. Are connected in turn, and one side of the decoder 15 is provided with an unvoiced sound generator 16 and a periodic impulse generator 17 to connect the L-type lattice network 18, and to the rear end of the L-type lattice network 18. In a rhythm generator in which a digital / analog converter 19, a voice signal amplifying circuit 20, and a speaker SP ₂ are sequentially connected, an input end of the split latch circuit 13 is variable with a condenser C ₁ . A rhythm generating device having a structure in which a rhythm speed adjusting circuit 21 composed of a clock term VR ₁ is provided, and a playing speed display circuit 22 is provided on one side of the control line CTL ₁ of the decoder 15. .