The Routledge Guide to Music Technology is an A to Z trade reference aimed at music students, technophiles, and audio-video-computer users. It offers brief definitions of key concepts, biographies of key figures, and discussion of the historical development of the audio world over the 20th century. The world of music technology has exploded over the last decades, thanks to introductions of new formats (MP3, RealAudio), hardware (Apple's iPod, DVD, CD-ROM), and software (computer file sharing). Now, musicians can create their own audio files and share them with listeners all over the world. Music students (and the average music consumer) need a quick guide to this technological universe.