System for storing and reading out musical tone signals

Details System for storing and reading out musical tone signals System for storing and reading out musical tone signals

1983-05-25

1984-08-14

Witkowski, Stanley J.

Music

Instruments

G10H 303

Patent

active

044649681

ABSTRACT:
A system stores and reads out a musical tone signal. The system comprises a circuit for supplying an input musical tone signal having a frequency versus level characteristic which varies with time, a generator for generating a control signal which undergoes level variation in correspondence with the variation in the characteristic of the input musical tone signal during a storing mode, a circuit supplied with the control signal for producing a frequency signal which varies its frequency according to the level of the control signal, an A/D converter for sampling the input musical tone signal according to the above frequency signal and converting the input musical tone signal into a digital signal, a voltage supplying circuit for supplying a voltage to the generator during a read-out mode, a memory into which the output digital signal of the A/D converter is stored according to the frequency signal during the storing mode and from which the stored digital signal is read out according to the frequency signal during the read-out mode, a D/A converter for converting the digital signal read out from the memory into an analog signal according to the above frequency signal, and a circuit for obtaining the output of the D/A converter as a reproduced musical tone signal. The generator generates the control signal of which frequency lowers with lapse of time.

REFERENCES:
patent: 4185531 (1980-01-01), Oberheim et al.

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