A complete guide for the do-it-yourselfer showing how to design compressors, expanders, envelope followers, VCAs, limiters and more using the versatile NE570 compander chip. In the past, working with the NE570 was not a very pleasant experience. Manufacturer's data sheets were difficult to wade through (having been written with telecommunications engineers in mind), and were all too often marred by errors and misprints. This manual sets the record straight, presenting accurate design details in a friendly yet complete form.