An audio processing system comprising processing devices and a processing module. The processing devices generate output signals, and the processing module calculates the output signals from the processing devices and generates an output result signal. Each processing device comprises a control module, a timing generation module, a memory module, and a conversion module. The control module receives an input control signal and generates a first control signal and a second control signal. The timing generation module is coupled to the control module and generates a timing signal according to the second control signal. The memory module is coupled to the control module and the timing generation module. The memory module receives and stores an audio signal and generates a memory signal according to the first control signal and the timing signal. The conversion module is coupled to the memory module and converts the memory signal to the output signal.