Book excerpt: Sound Theology: Pipe Organ Power Plays among Protestants, Pulpits, Professors, and Peers surveys the liturgical soundscape during and after the Reformation with regard to the use of instruments in worship in general, and the (dis)use of the pipe organ specifically. Why were some sounds considered sacred, and others profane? The book tells the story of first-generation reformers' approaches to shaping their new Reformed worship services in regard to music, and the resulting debates, power plays, and ultimate compromises. Sound Theology also examines second-generation Protestants' affirmations, adaptations, and reversals. Sound Theology: A Reader is a companion volume of curated primary source material. Together, Sound Theology's two volumes tell a little-known, but colorful and foundational story that shaped Reformed worship for centuries to come.