Matthew Arndt is an Associate Professor of Music Theory at the University of Iowa. He holds a Ph.D. in Music Theory with a double minor in Music Composition and Philosophy from the University of Wisconsin–Madison, an M.M. in Music Composition from the University of Colorado at Boulder, and a B.A. with honors in Music Composition from Lewis & Clark College. At the University of Colorado at Boulder, he studied with Richard Toensing of blessed memory. Professor Arndt has taught at Mercer University, Lawrence University, and the University of Wisconsin–Madison. He studies musical poetics, three-voiced chant from the Republic of Georgia, and other instances of spirituality in music. He has arranged Georgian chant for the Divine Liturgy of Saint John Chrysostom into English. He is the author of The Musical Thought and Spiritual Lives of Heinrich Schenker and Arnold Schoenberg (Routledge, 2018) and several articles. Professor Arndt primarily composes music for choir, flute, and piano. His music is influenced by Georgian chant, Byzantine chant, Bach, Beethoven, Schoenberg, Robert Johnson, Theolonius Monk, Olivier Messiaen, Jacques Ibert, Arvo Pärt, and others. Besides his contribution to Heaven and Earth, other recent compositions include four sonatas and a theme and variations for flute and piano, all of these works dedicated to his wife, Katherine, several liturgical pieces, a choral setting of the Jesus Prayer, and a piano fantasy on that setting.