The integration of audible space is a central aspect of electroacoustic music. Ever since the earliest analogue days of electroacoustic music, pioneers of the genre—including Pierre Schaeffer, Iannis Xenakis, Karlheinz Stockhausen, and Luigi Nono—used special devices and methods for their compositions and refined the possibilities of integrating the sound of space into music. In this anthology, analytical portraits of compositions and groups of compositions show the wide spectrum of spatial practices in early electroacoustic music. Additionally, retrospective views on the use of spatial composition in earlier epochs and in instrumental music of the twentieth century portray the practice of spatial composition in different eras and genres, as well as the universality of spatial music as a topic. This book contributes to a more differentiated understanding of the term "spatial music."