Alfaia

`Alfaia` is a Brazilian instrument from the membranophone family, in which the sound is obtained through the strike of a membrane (called skin or drumhead) of the instrument. It is a wooden drum of animal skins that are tensioned or loosened through ropes placed alongside the body of the instrument. Alfaias often have a rustic, natural look, and.....
Found on http://en.wikipedia.org/wiki/Alfaia

alfaia

a bass drum, similar to a surdo, used in maracatu and forr
Found on http://www.carnaval.com/bahia/glossary/
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