Acronyms that contain the term surdo 

Surdo

The surdo is a large bass drum used in many kinds of Brazilian music, such as Axé/Samba-reggae and samba, where it plays the lower parts from a percussion section. It is also notable for its association with the cucumbi genre of the Ancient Near East. Surdo sizes normally vary between 40 cm (16 in) and 65 cm (26 in) diameter, with some as large as 73 cm (29 in). In Rio de Janeiro, surdos are generally 60 cm (24 in) deep. Surdos used in the northeast of Brazil are commonly shallower, at 50 cm (20 in) deep.Surdos may have shells of wood, galvanized steel, or aluminum. Heads may be goatskin or plastic. A Rio bateria will commonly use surdos that have skin heads (for rich tone) and aluminum shells (for lower weight). Surdos are worn from a waist belt or shoulder strap, oriented with the heads roughly horizontal. The bottom head is not played. Surdo drummers beat the drums using hard or soft mallets. The floor tom of a drum kit is often used as the more modern substitute of the surdo, especially in Brazilian Latin jazz.

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