An incomplete draft of a book intended to serve as a guide and reference for librarians who are responsible for implementing digital audio services in their libraries. The book is divided into two parts. Part 1, "Digital Audio Technology," covers the fundamentals of recorded sound and digital audio, including a description of digital audio formats, how digital audio is delivered to the listener, and how digital audio is created. Part 2, "Digital Audio in the Library," covers digitizing local collections, providing streaming audio reserves, and using digital audio to preserve analog recordings.