This book is a guide to the wide range of audio and audio-associated integrated circuits (ICs) which are available for use by amateur and professional design engineers and technicians. The book deals with low frequency linear amplifiers, dual pre-amplifiers, audio power amplifiers, charged-coupled delay lines, bar-graph display drivers and power supply regulators and shows how to use these devices in circuit ranging from simple signal conditioners and filters to complex graphic equalizers, stero amlifier systems and echo/reverb delay line systems. Each chapter deals with a specific class of IC and starts off by explaining the basic principles of the subject and goes on to present a more in-depth look, including practical ICs and their applications. The book is specifically aimed at the practical design engineer, technician and experimenter, as well as the electronics student and amateur. R.M.Marston is also the author of CMOS Circuits Manual and Optoelectronic Circuits Manual.