Theoria is an annual peer-reviewed journal on all aspects of the history of music theory. It includes critical articles representing the current stage of research, and editions of newly discovered or mostly unknown theoretical texts with translation and commentary. Analytical articles on recent or unknown repertory and methods are also published, as well as review articles on recent secondary literature and textbooks. Back issues are available from Texas A&M University Press.

Volume 15 (2008) will include:
Articles by John Haines: “‘Proprietas' and 'Perfectio' in Thirteenth-Century Music Theory”; Jeffrey Brukman: “The Relevance of Friedrich Hartmann’s Fully-chromaticised Scales with Regard to Bitonality in Bartók’s Fourteen Bagatelles , Op. 6/1.”
An Edition by Paul Mathews: Anatomie et phisiologie de l’orchestre by Delius and Papus: A Translation and Commentary
Review Article by Vera Micznik: Approaches to Meaning in Music , ed. by Byron Almén and Edward Pearsall, Indiana University Press, 2006.

FRANK HEIDLBERGER is professor of music theory at the University of North Texas. He received his degrees in musicology at Würzburg University (Germany). He has published numerous books and articles on music history and theory of the 16th to 20th centuries, particularly on Italian instrumental music around 1600, 19th century composers Carl Maria von Weber, Hector Berlioz, and Giacomo Meyerbeer, and 20th century composer and theorist Paul Hindemith.