Historical Background -- The Midi in the Twelfth and Thirteenth Centuries -- The Troubadours -- Transmission -- Oral and Written Traditions -- The Manuscripts -- Concordances -- Poetics and Music -- Medieval Arts of Poetry and Prose -- The Art de trobar and the Art of Music -- Genre -- Theories of Genre -- Genre in the Art de trobar -- Melody Borrowing -- Function and Performance -- Structure -- Form -- The Art of Poetry and Musical Form -- Old Occitan Versification -- Graphing Musical Structure -- Phrase Repetition and Variation -- Tonal Centers, Contours, Incipits, and Cadences -- Motivic Construction -- Relationships between Poetic and Musical Structure -- Style -- Style in the Art de trobar -- Features of Musical Style and Their Interaction with Poetic Style -- Toward a Chronology of Style in the Melodies of the Troubadours -- Summary of Style Development -- Performance -- Rhythm -- Use of Instruments -- Chromatic Inflections -- Ornamentation and Simplification.