We live in the era of interactive media. Interaction with sound and music, both inherent elements of our media culture, still seems to be one of the most intricate aspects, though, and is subject to many research and development projects worldwide. This book presents a compilation of recent innovative works in this field and gives an impression of its wide scope. Topics reach from auditory displays for sound-based navigation, generative music, expressive performance, and new interfaces for musical expression to tools for musicology and music education.