The digital data can be converted into an analog signal with enhanced quality when the DSP has completed its work. A DSP can intensify frequencies, sort noise from a signal, and hold back others. Types of Audio Signal Processors Signal processors can be single- or multi-functional, digital or analog, or incorporated with other components in a sound system.
Most were unconnected devices, but became multi-functional over time with digital signal processors integrating a wide range of functions at a fraction of the cost of individual processors. The problem-solving features in DSPs today are Gain Control and Volume, Equalization, Filters, Compressors, Dynamics Processor, Expanders and Noise Gates, Limiters, Delay, Speech Leveller, Gated Automatic Mixers, Automatic Microphone Mixers, and Feedback Reducers.