An agogô (Yoruba: agogo, meaning bell) is a single or multiple bell now used throughout the world but with origins in traditional Yoruba music and also in the sambabaterias (percussion ensembles). The agogô may be the oldest samba instrument and was based on West African Yoruba single or double bells. The agogô has the highest pitch of any of the bateria instruments.
Each bell is a different size. This allows a differently pitched note to be produced depending on which bell has been hit. Originally wrought iron, they are now manufactured in a variety of metals and sizes for different sound qualities. The most common arrangement is two bells attached by a U shaped piece of metal. The smaller bell is held uppermost. Either bell may be hit with a wooden stick to make a cowbell like sound or less commonly a clicking sound is produced by squeezing the two bells together.
It is used in the ceremonial music of religions in Yorubaland as well as in their new world practice, which are based on beliefs brought by slaves from Africa such as candomblé. It may be officially used for congregation or heralding the coming of a dignitary. It is the main instrument of Obatala and Orisa Nla (Orisa Nla o, Alagogo Oje o). (Both Obatala and Orisa n la are very important Yoruba divinities).
Bell pattern 1 is the most basic, or archetypal pattern. It is the 4/4 form of what is known in ethnomusicology as the standard pattern, and known in Cuba as clave. Pattern 1 is used in maculelê and some Candomblé and Macumba rhythms. Bell 2 is used in afoxê and can be thought of as pattern 1 embellished with four additional strokes. Bell 3 is used in batucada. Pattern 4 is the maracatu bell and can be thought of as pattern 1 embellished with four additional strokes.