Final answer:
Count Basie made significant musical contributions to the Swing Era with his innovative use of the Basie style and leadership of the Count Basie Orchestra.
Step-by-step explanation:
Count Basie made significant musical contributions to the Swing Era. He was a renowned jazz pianist, bandleader, and composer. Basie's contributions to the Swing Era include his innovative use of a riff-based style, known as the Basie style, which featured a tight rhythm section and emphasized improvisation.
He led the Count Basie Orchestra, one of the most popular and influential big bands of the time, and recorded numerous hits such as "One O'Clock Jump" and "Jumpin' at the Woodside." Basie's music played a key role in defining and shaping the sound of the Swing Era.