SU924743A1

SU924743A1 - Device for simulating laisli effect in electric musical instruments

Info

Publication number: SU924743A1
Application number: SU802997927A
Authority: SU
Inventors: Владимир Михайлович Фартух; Анатолий Мечиславович Криштафор
Original assignee: Предприятие П/Я Г-4125
Priority date: 1980-10-29
Filing date: 1980-10-29
Publication date: 1982-04-30

Description

Изобретение относится к электромузыкальным инструментам.The invention relates to electric musical instruments.

Известно устройство для получения эффекта Лесли - имитации вращающегося источника звука, содержащее схему переменной задержки, блок для изменения величины времени задержки, схему изменения частотного спектра сигнала, контур обратной связи, для подачи сигнала с выхода схемы изменения частотного спектра гл 10 на управляемую схему задержки [1].A device for producing the Leslie effect - simulating a rotating sound source, containing a variable delay circuit, a unit for changing the delay time, a circuit for changing the frequency spectrum of the signal, a feedback loop for supplying a signal from the output of the circuit for changing the frequency spectrum of hl 10 to a controlled delay circuit [ 1].

Недостатком данного устройства является его сложность.The disadvantage of this device is its complexity.

Наиболее близким к предлагаемому является устройство, содержащее входной ₁₅разветвитель.управляемуюлинию задержки, вход которой соединен с одним из выходов входного разветвителя, сумматор, первый вход которого подключен к выкосу управляемой линии задержки, второй - соединен _мс другим выходом входного разветвителе выходной усилитель, подключенный выходов к выходу сумматора, и генератор инфранизкой частоты, выход которого поцклто2 чен к входу управления управляемой линии задержки [2].The closest to the proposed is a device comprising an input razvetvitel.upravlyaemuyuliniyu ₁₅ delays input of which is connected to one input of splitter outputs, the adder having a first input controlled delay line is connected to mow, the second - _m is connected to the other output of the input coupler output amplifier connected outputs to the output of the adder, and an infra-low frequency generator, the output of which is connected to the control input of the controlled delay line [2].

Недостатком данного устройства является недостаточное качество имитации, так как устройство имеет амплитудночастотную характеристику (АЧХ), аналогичную АЧХ вращающегося громкоговорителя, у которого форма диаграммы направленности не зависит от частоты. Фактически диаграмма направленности излучения громкоговорителя значительно сужается в области верхних частот.The disadvantage of this device is the poor quality of the simulation, since the device has an amplitude-frequency characteristic (AFC) similar to that of a rotating loudspeaker, in which the shape of the radiation pattern does not depend on frequency. In fact, the radiation pattern of the speaker narrows significantly in the high frequency region.

Цель изобретения — повышение качества имитации.The purpose of the invention is to improve the quality of the simulation.

Поставленная цель достигается тем, что в устройство имитации эффекта Лесли в электромузыкальных инструментах, содержащее разветвитель, вход которого соединен с входной шиной, первый, выход непосредственно, а второй через управляемую линию задержки подключены к входам сумматора, выходной усилитель и генератор инфранизкой частоты, выход которого соединен с входим управления управляемой лиши задержки, введен управляемый фильтр нижних частот, включенный между выходом сумматора и входом выходного усилителя, причем вход управления управляемого фильтра ниж- 5 них частот соединен с выходом генератора инфранизкой частоты.This goal is achieved by the fact that in the device for simulating the Leslie effect in electric musical instruments, containing a splitter, the input of which is connected to the input bus, the first, the output is directly, and the second is connected via the controlled delay line to the inputs of the adder, the output amplifier and the low-frequency generator, the output of which connected to the control input of the controlled delay latch, a controlled low-pass filter is introduced, connected between the output of the adder and the input of the output amplifier, and the control control input a low pass filter is connected to the output of the low-frequency generator.

На чертеже показана структурная электрическая схема предлагаемого устройства. 10The drawing shows a structural electrical diagram of the proposed device. 10

Устройство содержит разветвитель 1, управляемую линию 2 задержки, сумматор 3, управляемый фильтр 4 нижних частот, выходной усилитель 5, генератор 6 инфранизкой частоты. 15The device comprises a splitter 1, a controlled delay line 2, an adder 3, a controlled low-pass filter 4, an output amplifier 5, an infra-low frequency generator 6. fifteen

На входную шину 7 подан звуковой сигнал.An audio signal is given to input bus 7.

Принцип работы устройства заключается в следующем.The principle of operation of the device is as follows.

Генератор 6 управляет линией 2, в ре-₂₀зультате чего фаза сигнала на выходе линии 2 будет промодулирована с частотой вибрато (5—10с'¹ ).The generator 6 controls line 2 was established as a result of which phase ₂₀ at the output line 2 is modulated at the frequency vibrato (5-10s' ^1).

Этот преобразованный сигнал смешивается в сумматоре 3 с исходным и по> 25 ступает на управляемый фильтр 4 и далее через выходной усилитель 5 на выход устройства. При этом с частотой вибрато перестраивается также управляемый фильтр 4, что приводит к перемещению частоты среза АНХ в области средних и верхних частот, которое эквивалентно- эволюциям АЧХ систем с вращающимся источником звука.This converted signal is mixed in the adder 3 with the original one and goes over> 25 to the controlled filter 4 and then through the output amplifier 5 to the output of the device. At the same time, the controlled filter 4 is also tuned with the vibrato frequency, which leads to a shift in the cutoff frequency of the ANX in the middle and high frequencies, which is equivalent to the evolution of the frequency response of systems with a rotating sound source.

Экспериментальные исследования предлагаемого устройства показали, что оно ³⁵ обеспечивает более точную имитацию вращения источника звука по сравнению с известными устройствами. Оптимальный диапазон перемещения частоты среза управляемого фильтра низкой частотыExperimental studies of the proposed device showed that it ³⁵ provides a more accurate simulation of the rotation of the sound source compared with known devices. The optimum range of movement of the cutoff frequency of the controlled low-pass filter

2-16кГц,2-16kHz,

Claims

The invention relates to electromusical instruments. A device is known for generating a Leslie effect CPU — simulating the rotation of a sound source, which contains a variable scatter circuit, a block for changing the delay time, a circuit for changing the frequency spectrum of a signal, a feedback loop, a signal for changing the frequency spectrum to a control circuit. zlёrzhki tl. The nexus of a valuable device is its complexity. Most blizyu1m to pretslagaemomu is an apparatus sotserisaschee vhotsnoy razvetvigel.upravl emuyu delay line, which is connected to vhots otsnim of vyhotso vhotsnogh) splitter, an adder having a first input to potsklyuchen vyhosu controllable zatserzhki line, the second - soetsinen with another output of the input output razvetvitep5 an amplifier connected to the output of the accumulator by Buxoaov, and an infraniek generator of frequency, the output of which is closed to the control input of the controlled delay line 2. The disadvantage of this device is insufficient imitation, since the device has an amplitude-frequency characteristic (AFC), an analog frequency response of a rotating loudspeaker, in which the shape of the radiation pattern does not depend on frequency. In fact, the radiation pattern of the loudspeaker is significantly narrowed in the high-frequency region. The purpose of the invention is to improve the quality of conversion. The goal is achieved by the fact that in the Leslie effect imitation device in electromusical instruments, containing a splitter, the input of which is connected to the input 1SHOY, is the first output directly, and the second through the controllable delay line is connected to the inputs of the adder, output amplifier and ultra low frequency generator whose output is connected to the input. controllable controlled loop, introduced a controlled filter of southern frequencies, connected between the Bbixoaow of the adder and the input of the downlink amplifier, and the control input of the lower end of the low frequency filter is connected to the output of the ultra low frequency generator. The drawing shows a structural electrical circuit of the device. The device contains a splitter 1, a controllable delay line 2, a total of 3, a controlled low-pass filter 4, an output amplifier 5, and an infra-low frequency generator 6. On the input bus 7, the signal is sound. The principle of operation of the device is as follows. The generator 6 controls line 2, as a result of which the phase of the signal at the output of line 2 will be modulated with the vibrato frequency (). This transformed signal is mixed in the adder 3 with the initial one and goes to the controlled filter 4 n further through the output amplifier S to the output of the device. At the same time, the controlled filter 4 is also tuned with the vibrato frequency, which leads to a shift in the frequency response of the frequency response in the medium and high frequencies, which is equivalent to the evolution of the frequency response of systems with a rotating sound source. Experimental studies of the proposed device have shown that it provides a more accurate operation of the sound source compared to the known devices. The optimum gapaponon of the cut-off frequency of the adjustable low-pass filter is 2-16 kHz. The invention formula The Leslie effect simulator in electromusical instruments, comprising a splitter whose input is connected to the input BUS, the first output is directly and the second through a controllable delay line connected to the inputs of the adder, output amplifier and infra-low frequency generator, the output of which is connected to the control input of the control The delay line, which is based on the fact that, with the aim of simulating the quality of the simulation, a low-frequency control is connected to it, connected between the output of the adder and the input Khodnev amplifier, said control controlled lowpass filter input is connected to the generator output. infra-low frequency. Sources of information taken into account in the examination 1. US patent number 3838202, cl. 84-1.19, 09.24.74.

2. Radio, 1979, No. 11, p. 35