According to the context, DSP can mean Digital Signal Processor or Digital Sound Processing.
Digital Signal Processor
A Digital Signal Processor is a processor for the digital processing of a signal. Its architecture is optimised to process a large quantity of data in parallel on each clock cycle. This operating mode is very effective for processing digital signals such as video or music (by filtering, compression, extraction etc.).
Digital Sound Processing
Digital Sound Processing is acoustic effects created by a digital processor to give the listener the impression that they are in a concert hall, a church or a bar using a simple stereo signal. DSP modes can be found on multichannel audio video amplifiers.
Texas Instruments is one of the world leaders in DSP manufacture. © Texas Instruments