Ensayo

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[ ] is a style of music and dance imported from West Africa during the time of slavery, with its modern development beginning in Loíza and Ponce. Bomba was played during the festival of St. James, since slaves were not allowed to worship their own gods, and soon developed into countless styles based on the kind of dance intended to be used at the same time; these include leró, yubá, cunyá, babú and belén.

Bomba often begins with a laina, or a female singer who is answered by the chorus and musicians with a 2/4 or 6/8 rhythm before the dancing begins. Harmony is not used. Dancers interact with the drummer, who is usually solo and dance in pairs without touching each other.

The dancers challenge the drummers in a kind of competing dialog, like the controversia mentioned earlier. The drummers respond with a challenge of their own. Sometimes one group of dancers will tempt another group to respond to a set of complicated steps. As the bomba proceeds, tension rises and becomes more excited and passionate. It's not unusual for a bomba to end with all the performers thoroughly soaked with perspiration.

The instrumentation is simple: usually the main rhythm is maintained by a low-pitched drum known as the buleador, while the high-pitched drum or subidor dialogs with the dancers. More complicated counter rhythms are created with sticks beaten on any resonant surface. A third set of rhythms is maintained by a maraca.

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The décima has its roots in 16th century Spain and represents the earliest examples of the combination of native rhythms and the lyrics and melodies from the mother country. Décima is derived from Andalusian ballads that came to Puerto Rico in the late 17th century. Décima (meaning tenth) usually consists of ten improvised couplets of eight syllables each; the form quickly became popular among jibaros, or peasants. Note that a décima is also the name of a very specific type of verses in Spanish poetry.

The rules for the lyrics are complex and particularly difficult to execute since the lyrics are composed on the spot:
The song is composed of 10 lines, consisting of 5 couplets of 2 lines each
Each line of the couplet has 8 syllables
The syllable count is complicated by rules covering adjacent sounds
The rhyming structure has the form: A B B A A C C D D C
Vicente Martinez de Espinel was a Spanish writer and musician who revived the décima, using Andalusian jibaro traditions and medieval Moorish influences. The two varieties are seis, a dance music, and aguinaldo, derived from Spanish Christmas carols.

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The seis originated in the latter half of the 17th century in the southern part of Spain. The word means six, which may have come from the custom of having six couples perform the dance, though many more couples eventually became quite common. Men and women form separate lines down the hall or in an open place of beaten earth, one group facing the other. The lines would approach and cross each other and at prescribed intervals the dancers would tap out the rhythm with their feet.

The melodies and harmonies are simple, usually performed on the cuatro, guitar, and güiro, although other indigenous instruments are used depending on the available musicians. The 2/4 rhythm is maintained by the güiro and guitar.