Sound processing apparatus and method with fading effect

摘要

A sound processing apparatus and method with fading effect is disclosed. The sound processing method includes: sequentially sending out pulse modulation signals; separating the pulse modulation signals into a first portion and a second portion, wherein the first portion and the second portion are respectively processed by a corresponding digital to analog (D/A) conversion via a first D/A converter and a second D/A converter; respectively inputting a first reference signal and a second reference signal to the first D/A converter and the second D/A converter, thus respectively obtaining an offset signal and a fading signal from the first D/A converter and the second D/A converter; and adding the offset signal and the fading signal into an output sound signal. The sound processing apparatus includes a first reference signal generator for generating two different reference signals; a switching element for selecting one of the two different reference signals as a first reference signal; an offset effect converter for receiving a first portion of a pulse code modulation signal and the first reference signal and outputting an offset signal; a second reference signal generator for generating a second reference signal which is selected from one of two different reference signals; and a fading effect converter for receiving a second portion of a pulse code modulation signal and the first reference signal and outputting a fading signal; wherein the offset signal and the fading signal are added to be an output sound signal.