Explain the impact of early blues music on the development of rock and roll, citing specific musical elements and prominent artists.

Early blues music served as the foundational bedrock upon which rock and roll was built, providing not just musical structures but also the emotional intensity and raw expressiveness that defined the new genre. The impact of blues was multifaceted, affecting rock's harmonic language, rhythmic patterns, vocal styles, and instrumentation. Harmonically, blues contributed the characteristic 12-bar blues progression, a sequence of chords based primarily on the tonic, subdominant, and dominant chords (I, IV, V). This foundational chord structure became a staple in countless early rock and roll songs and remains a recognizable blueprint. Early rock artists directly borrowed this progression, adapting it to their own style and instrumentation, but the blues' influence was unmistakable. For example, songs like Chuck Berry's "Johnny B. Goode" and Elvis Presley’s "Hound Dog" use variations on the 12-bar blues progression, showcasing how this basic harmonic structure was immediately adopted into rock and roll. Rhythmically, the blues brought a swing or shuffle feel, characterized by a triplet feel on the beat—a long-short pattern, often described as "da-da-da." This rhythmic sensibility is heard in many early rock songs, providing a sense ....