This posthumous compilation of writing by beloved scholar, teacher, and musician Mark P. Bangert explores how, in addition to his other contributions, Martin Luther expressed a theological valuation of music that can inspire and inform today's understanding and use of music, especially in Christian worship. Luther's preface to Symphoniae iucundae ("Delightful Symphonies," 1538) presents the clearest explication of this theology. At the time of his death, Bangert had composed core components of a book on Luther's preface. Drawing on this work and other writings by Bangert on Luther and music, Martin Seltz has edited a collection that pays tribute both to Luther's theology and to Bangert's important body of scholarship.