The popular form outlines modern methods and devices for magnetic recording and reproduction of sound. The principles of construction and technical characteristics of modern broadcasting devices are given. The principles of obtaining surround and stereo sound are considered. Shows ways to implement studio, professional, amateur stereo amplifiers, players, radio receivers and tape recorders. Examples of circuit and structural design of the best examples of foreign and Soviet sound reproduction equipment are given. The book is designed for a wide range of readers. It can be useful both for radio amateurs and specialists in the field of designing broadcasting equipment and sound reproducing devices.