Fux - Gradus ad Parnassum

"Gradus ad Parnassum" by Fux is a foundational music theory manual from 1725 that teaches the art of counterpoint—how multiple melodic lines work together harmoniously. It systematically guides students through the rules and techniques for composing polyphony, emphasizing clarity, balance, and musical coherence. The book is structured in exercises, gradually increasing in complexity, to develop a composer’s skill in creating well-crafted, properly interconnected melodies. Fux's principles remain influential, serving as a core resource for understanding classical composition and the development of Western tonal music.