The paper describes the concept of a family of noise reduction and signal processing modules designed for use by designers of a variety of audio equipment. The concept allows a move away from the traditional standalone systems to built-in systems, where the signal processing is an integral part of the equipment. The main advantage of this approach is a much-simplified user interface, with controls and procedures being part of the standard operating practices of the host machine. In addition, a welcome benefit is the potential for considerable cost reduction to the end user since duplication of controls, power supplies, and metalwork can be avoided. As well as a discussion of the engineering problems and their solutions, the paper considers the political aspects of the concept. Finally, there is a discussion of the three commercial products which have appeared from well-known video and audio manufacturers.
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