SU798974A1 - Rhythmic electric musical instrument - Google Patents

Description

(54) RHYTHMIC ELECTRIC MUSICAL TOOL

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This invention relates to electronic music.

A musical device is known comprising a master oscillator, logic circuits, modulators, and pulse counters.

The disadvantage of this device is its limited functionality.

Closer to the technical nature of the present invention is a rhythmic elektromu-; A sonic instrument containing a clock generator, to which a pulse counter, a decoder, a matrix, generators of simulated signals, an amplifier and a loudspeaker are sequentially connected. The pace of the rhythmic accompaniment performed here is determined by the frequency of the clock pulse generator, which is controlled by the changes in resistor 2}.

However, the tempo setting method used has a number of drawbacks, the main ones being the low speed and convenience of tempo setting. The performer needs to set an appropriate tempo before performing one or another piece. To do this, he must set the tempo control to a specific position corresponding to the required tempo. However, setting the regulator to one or the other position does not give accurate information about the set tempo, since the instrument is in rest mode, only after its start-up, information on the set tempo will be obtained during one musical measure. However, from the performing point of view, it is necessary to establish an exact setting of the tempo of rhythmic accompaniment before the beginning of the performance.

The purpose of the invention is to provide an opportunity to accurately set the tempo of the rhythmic soyrovo) (building. The goal is achieved by the fact that the rhythmic electro-language language tool contains a generator of pulses, a pulse counter, the output of which is connected to the input of the decoding matrix, the rhythmic pattern forwarder and block Generators of simulated signals, the output of which is connected to the speaker system, are triggered with a button for controlling the beginning and end of the BpeMeHHO

first interval and inputs, respectively, a filling signal generator, whose input is connected to the first trigger output, and output is connected to the pulse counter input, to the second reset input, a second trigger output is connected through the reset circuit, and a coincidence output block that is connected to the second input of the trigger, and the input - with the input of the decoding matrix, the output of which is through the generator

The clock pulses are connected to the input of the rhythmic pattern former, the output of which is connected to the input of the generator of simulated signals,

The structural electrical diagram of the device is shown in the drawing. The rhythmic electromuscular instrument contains trigger 1, button 2, fixing the beginning of the specified time interval, button 3, fixing the end of the specified time interval, reset unit 4, filling pulse generator 5, coincidence block 6, pulse counter 7, decoding matrix 8, controlled generator 9 clock pulses, a rhythmic pattern forming unit 10, a simulated signal generator unit 11, a switch 12 for stopping and starting a rhythmic accompaniment, and an acoustic system 13.

In the proposed rhythmic musical instrument, button 2 is connected to the first input of trigger 1, fixing the beginning of the time interval. To the second input of the trigger is connected a button 3, fixing the end of the time interval. A pulse counter 7 is connected to the first output of trigger 1 via a filling pulse generator 5, the output of which includes a decoding matrix 8. In addition, the second output of trigger 1 is connected to the reset input of counter 7 via a reset unit 4, and the input of counter 7 through a matching unit consecutive pulses connected to the second input of the trigger 1. To the output of the decoding matrix 8 are connected in series a controlled oscillator 9 clock pulses, a block 10 forming rhythmic patterns, a block 11 generators of simulated signals and an acoust Ceska system 13. Generator 9 taktoBtdx pulse forming unit 10 and rhythmic patterns are connected with a switch 12 for stopping and starting rhythm accompaniment.

The device works as follows.

The desired tempo of rhythmic accompaniment is set by alternately pressing buttons 2 and 3 with a time interval between pressings equal to the duration

musical beat performed work. When the button 2 is pressed, the trigger 1 is shifted to the position at which the first output of the trigger 1 is set to a level that transfers the filling generator 5 from the retarded state to the self-oscillating state. In addition, at the moment of pressing the KEY 2, the voltage drop of the trigger 1, received on the second output of the trigger 1 and through the reset unit 4 arriving at the counter 7, sets it to its initial state. When the button 3 is pressed, the trigger 1. returns to the initial state and the filling pulse generator 5 is switched to the inhibited state. The resulting burst of pulses goes to counter 7, the output of which is connected to a decoding matrix 8, an outstanding voltage proportional to the duration of the burst, as well as the duration of the time interval between pressing buttons 2 and 3. The coincidence block b serves to protect counter 7 from overflowing . The constant voltage from the output of the matrix 8 is applied to the ynpai laser generator 9 clock pulses, which produces pulses with a repetition period directly proportional to the magnitude of the applied voltage. The signal from the controlled oscillator 9 clock pulses is fed to the block 10 of the formation of rhythmic patterns, which in the form of certain sequences of pulses is fed to the block 11 generators of simulated signals, the signals of the block 11 generators of simulated signals are sent to the speaker (amplifier with speaker) 13. Switch 12 makes it possible to stop or resume rhythmic accompaniment. When the switch 12 is turned on, the controlled clock pulse generator 9 is shifted to the inhibited position, and the rhythmic pattern making unit 10 is reset, and the rhythmic accompaniment is not listened.

The proposed rhythmic electromusical instrument allows to obtain an accurate and operational setting of the tempo of the rhythmic accompaniment before the beginning of the performance of the musical work, which makes it possible to use it in percussion electronic musical instruments.

Claims (2)

1. US patent 3742112, cl. 84-1.03, 1973. 2. US Patent 3,743,757, Cl. 84-1.03, 1973. ±