Theoretical Perspective -- Music Theory as Psychology -- The Connection with Linguistics -- The Connection with Artistic Concerns -- The Overall Form of the Theory -- Introduction to Rhythmic Structure -- Grouping Structure -- Metrical Structure -- The Interaction of Grouping and Meter -- The Relation of Structural Accent to Grouping and Meter -- Grouping Structure -- Grouping Well-Formedness Rules -- Perceptual Motivation for the Preference Rule Formalism -- Grouping Preference Rules -- Grouping Overlaps -- The Performer's Influence on Preferred Hearing -- Two More Examples -- Metrical Structure -- Metrical Well-Formedness Rules -- Metrical Preference Rules -- Further Metrical Preference Rules -- Variations on the Metrical Well-Formedness Rules -- Metrical Irregularities at Hypermeasure Levels -- Introduction to Reductions -- The Need for Reductions -- Possible Formal Approaches to Reduction -- The Tree Notation for Reductions -- Preliminary Construction of Reductions -- Time-Span Reduction: The Analytic System -- Time-Span Segmentation -- Time-Span Trees and Metrical Structure -- Time-Span Trees and Structural Accents -- Details of Cadential Reduction -- Background Structures and the Location of the Structural Dominant -- A Complete Time-Span Reduction -- Formalization of Time-Span Reduction -- Time-Span Segmentation -- Time-Span Reduction Well-Formedness Rules -- Preference Rules Within Phrases -- Structural Accents of Groups -- Prolongational Reduction: The Analytic System -- Intuitions About Tension and Relaxation.