Describe the fundamental differences in harmonic language between the Baroque and Romantic periods, providing specific examples of chord progressions and voice leading techniques characteristic of each era.

The fundamental differences in harmonic language between the Baroque and Romantic periods are significant, reflecting shifts in musical aesthetics, compositional techniques, and the expressive aims of composers. In the Baroque period (roughly 1600-1750), harmony was largely governed by the principles of tonal functional harmony. Chord progressions were primarily diatonic, meaning they were based on the major and minor scales and their related harmonies. The dominant-tonic relationship was paramount, providing a strong sense of resolution and closure. Common chord progressions included the movement from the subdominant (IV) to the dominant (V), then to the tonic (I), and various other permutations based on the circle of fifths. Voice leading was carefully controlled, emphasizing stepwise motion and the avoidance of parallel fifths and octaves. Bass lines were foundational, often creating a strong sense of harmonic direction. Cadences, such as the authentic (V-I) and plagal (IV-I) cadences, played crucial roles in shaping the musical structure. For example, in a typical Baroque piece, we might encounter a simple progression such as I-IV-V-I in C major (C-F-G-C)....