The characteristic that is unique to ragtime piano is abundant syncopation in the melody above the steady duple background.
Ragtime Piano is a propulsive syncopated musical form that was popular in America from roughly (1899 - 1917) and was a predecessor of jazz.
Ragtime's distinctive expression was found in structurally arranged piano tunes.
During this time, ragtime piano and the marches played by brass bands actually shared much in common but the characteristic that is unique to ragtime piano is abundant syncopation in the melody above the steady duple background.
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