Sony Corporation

Takashi Shibata

Masaaki Nishimura

Toshihiko Miyata

An indicator and display for use with a graphic equalizer which receives an audio signal and includes first and second band pass filters which receive the audio signal and pass different pass bands, first and second variable resistors which have control shafts and knobs connected thereto with illuminators mounted in the knobs, first and second rectifiers connected to the output of the band pass filters, and first and second drive circuits connected to the outputs of the first and second rectifiers and the drive circuits connected to the illuminators in the knobs and an oscillator switching circuit connected to the illuminators so as to cause the illuminators to flash under certain conditions.

Frequency response display for use with a graphic equalizer

A reverberation apparatus includes a signal input terminal to be supplied with an input signal, an operational amplifier having an inverted input terminal, a non-inverted input terminal, and an output terminal. The inverted input terminal is connected to the signal input terminal through an input impedance circuit. The non-inverted input terminal is connected to a reference point, and the output terminal is connected to the reference point through an inductance circuit as a load and a first impedance circuit. A second impedance circuit is connected between the inverted input terminal of the operational amplifier and the connection point between the inductance circuit and the first impedance circuit. In this circuit, the inductance circuit functions as a drive circuit of the reverberation apparatus.

Reverberation apparatus

A reverberation apparatus is formed of bucket brigade delay circuit having its input connected to a signal source. An output of the delay circuit is connected through a spring-type reverberator to one of two inputs of an adder, the other being connected to the signal input. The output of the adder provides the desired reverberation sound. In one embodiment, two series connected delay circuits and reverberators are provided, each connecting to a respective input of a respective adder. The other inputs of each adder are connected to the signal source and the outputs of the respective adders provide separate stereophonic-like left and right channel outputs.

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Kamakura, Japan

Takashi Shibata