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Samba-canção is a Brazilian song style that slows down the rhythmic drive of samba and foregrounds a crooning, intimate vocal delivery. It is characterized by sentimental, often bittersweet lyrics (the famed dor-de-cotovelo "broken‑hearted" ethos), lyrical melodies, and harmonically rich progressions that anticipate the sophistication later associated with bossa nova. Arrangements typically feature voice with piano or guitar, plus subtle percussion and, in many classic recordings, strings or small orchestra. While it retains samba’s syncopated feel, the groove is gentler and more rubato-friendly, favoring mood and storytelling over dancefloor propulsion.

Soul is a genre of popular music that blends the spiritual fervor and vocal techniques of African‑American gospel with the grooves and song forms of rhythm & blues and the harmonic palette of jazz and blues. It is defined by impassioned, melismatic lead vocals; call‑and‑response with backing singers; handclaps and a strong backbeat; syncopated bass lines; and memorable horn or string riffs. Typical instrumentation includes drum kit, electric bass, electric guitar, piano or Hammond organ, horns (trumpet, saxophone, trombone), and sometimes orchestral strings. Lyrically, soul ranges from love and heartbreak to pride, social commentary, and spiritual yearning. Regionally distinct scenes—such as Detroit’s Motown, Memphis/Stax, Muscle Shoals, Chicago, New Orleans, and Philadelphia—shaped different flavors of soul, while the style’s emotional directness and rhythmic drive made it a cornerstone of later funk, disco, contemporary R&B, and hip hop.