A Digital Sound Processor (DSP) is a sound device for digital sound processing. With such a DSP processor, the frequency-determining parameters of the digitized sound, such as the frequency response, the frequency behavior, the harmonics, the phasing of individual frequencies, the delay times, and much more can be changed, thereby influencing the sound and the spatial sound.
The input signals to an audio processing system can be analog or digital and can come from one or more sources. Analog input signals must be digitized in an AD converter before being processed by the digital sound processor. Depending on the sound requirements, digitization is performed at 8, 16 or 24 bits.
A typical application for a digital sound processor is the processing of stereo signals with the two analog input signals for the left and right channels to analog output signals for the left and right speakers and a subwoofer.