A digital signal processor (DSP) is a specialized microprocessor (or a SIP block), with its architecture optimized for the operational needs of digital signal processing. The goal of DSPs is usually to measure, filter and/or compress continuous real-world analog signals. Most general-purpose microprocessors can also execute digital signal processi...
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http://en.wikipedia.org/wiki/Digital_signal_processor
(from the article `information processing`) ...recording of sound is important because speech is the most frequently used natural carrier of communicable information. Direct capture of sound ... ...be inexpensive. Embedded processors help to control aircraft and industrial automation, and they are common in automobiles and in both large...
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http://www.britannica.com/eb/a-z/d/48
An integrated circuit that electronically processes signals such as sound, radio, and microwaves by converting them from analogue to digital signals.
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http://www.encyclo.co.uk/local/20870
In electronic engineering, a digital signal processor (DSP) is a specialized circuit, usually a chip, that is designed to manipulate large quantities of data in real-time.
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http://www.probertencyclopaedia.com/browse/GD.HTM
Most signal processors these days are digital. They allow the instant recall of all the parameter settings of the device without having to manually reset all the controls every time a different sound effect is required. Increasingly DSP's are becoming software based, accessed via an audio recording or editing application as a plug-in.
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http://www.traditionalmusic.co.uk/music%20tech%20glossary/Music%20Tech%20Gl
A microprocessor optimized in hardware design and software instruction set for the processing of analog signals digitally. This is achieved by DFT and similar techniques.
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