Apparatus and method for processing an audio signal to...

Details Apparatus and method for processing an audio signal to... Apparatus and method for processing an audio signal to...

2008-01-08

2008-01-08

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Sound effects

C381S104000, C381S106000, C381S107000, C381S098000

Reexamination Certificate

active

10030521

ABSTRACT:
A circuit for processing an input audio signal received at an input of the circuit provides a processed audio signal at a circuit output. The circuit includes first and second conductive paths through which the received audio signal travels. The audio signal is processed such that harmonics of the signal components with a low-frequency are generated in the second path and are admixed to the signal in the first path. In the second path the audio signal is sequentially bandpass filtered, weighted with a correction factor, amplified, limited to a predetermined value, and bandpass filtered, where the correction factor is reduced when the predetermined value is exceeded.

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Japanese Patent Abstract 59-22419, Sano Shinya, “Harmonic Synthesizing Circuit,” Feb. 4, 1984.

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