Discover the fundamental principles behind music with this vintage study guide by Backus from 1969. This book offers a comprehensive study of the acoustical elements of music, covering the basics of classical music and its key principles. The guide is written in English, making it accessible to a wide range of readers, from intermediate music students to advanced musicians.

This book is a must-have for anyone interested in the acoustical foundations of music. With its easy-to-understand language and thorough coverage of the subject, it is the perfect study companion for those looking to expand their knowledge of classical music. Get your hands on this rare find today and take your music education to new heights.