Echo attaching circuit and audio device using the same

Details Echo attaching circuit and audio device using the same Echo attaching circuit and audio device using the same

1994-11-21

1995-08-22

Isen, Forester W.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381106, H03G 300

Patent

active

054447852

ABSTRACT:
An analog signal to be delayed thereby is compressed according to a monotonously increasing, convex compression function and sent to a delay circuit constituted digitally. Data of a digital value stored in a memory is read out after a constant delay time and converted into an analog signal by a D/A converter. The analog signal is expanded according to a reverse function of the compression function to restore it as an echo signal.

REFERENCES:
patent: 4438525 (1984-03-01), Shibata et al.
patent: 4550426 (1985-10-01), Gillig et al.
patent: 4611300 (1986-09-01), Taylor, Jr. et al.
patent: 5131051 (1992-07-01), Kishinaga et al.
patent: 5146507 (1992-09-01), Satoh et al.
Chamberlin, Musical Applications of Microprocessors, 1980, pp. 344, 345, 353, 379-381.

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