Introduction and Meaning:
In terms of digital audio, a signal processor is a device that does the job of modifying an audio signal, both digital and electric. It could be a computer software or a component of electronic hardware. A simple example of a signal processor is a high-pass filter, which helps in eliminating low frequencies from any given signal.
If they are carefully used, they may contribute to the sound fidelity, and can sometimes better reality.
If used inappropriately, they may have an adverse effect on the quality of sound and may produce undesired output. It is very much possible to convert songs into something completely different with the help of signal processors. Hence they are immensely popular with electronic music composers and disc jockeys.
Originally, signal processors were always electronic circuits that analog signals were affected by. In digital audio, signal processors could be a computer software that audio information in the digitized form is altered by. DSP (digital signal processing) generally points towards the processors that get involved to calculate the effect a digital signal processor will have on any audio file. Example; HD Accel cards designed by Digidesign consist of processors which help calculate the changes occurred in digital audio signal.
Digital signal processing functions with the help of mathematical operations. Contrary to this, other programs just shuffle the data which is already stored. Digital signal processors have witnessed an enormous growth in sales over the past decade because they can be used even in devices like cell phones or any other device which involves audio signals.
Market for Digital Signal Processors:
The market for Digital Signal Processors is enormous and fast growing. This is because of the rapidly increasing demand for better electronic goods such as multimedia computers, high fidelity music reproducing devices. There are four companies dominating the Digital Sound Processor market. They are: Analog Devices, Lucent Technologies, Motorola and Texas Instruments.
Types of Signal Processors:
There are various types of signal processors. Some of them are; Equalizers, Filters, Dynamic processors like noise gates and compressors.