The modern samba that emerged at the beginning of the 20th century is basically 2/4 tempo and varied, with conscious use of the possibilities of chorus sung to the sound of palms and batucada rhythm, which adds one or more parts, or stanzas, of declaratory verses. Traditionally, the samba is played by strings (cavaquinho and various types of guitar) and various percussion instruments such as tamborim. By influence of American orchestras in vogue since the Second World War and the cultural impact of US music post-war, began to be used also as instruments trombones and trumpets, and the influence choro, flute and clarinet.
The Samba National Day is celebrated on December 2. The date was established at the initiative of a Alderman of Salvador, Luis Monteiro da Costa, in honor of Ary Barroso, which was composed "Na Baixa do Sapateiro" - although he had never been in Bahia. Thus, on December 2 marked the first visit of the Ary Barroso to Salvador. Initially, this day was celebrated only in Salvador, but eventually turned into a national day.