The swing era refers to a period in the 1930s and early 1940s when swing music became the dominant form of popular music in the United States. Characterized by a strong rhythm, smooth melodies, and the use of big bands, this era saw jazz evolve into a more danceable and commercially successful genre. During this time, vocalists began to incorporate scat singing and vocal improvisation into their performances, while the shift from primarily dance music to a focus on art music emerged as jazz musicians sought greater creative expression.
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