For the football player of the same name see Surdu.

Surdo drums in use

The surdo is a large bass drum used in many kinds of Brazilian music, most notably in Axé/Samba-reggae and samba and its variants, where it plays the lower parts from a percussion section.

Surdo sizes normally vary between 16" or even 14" and 26" or even 29" diameter. In Rio de Janeiro, surdos are generally 60cm deep. Surdos used in the northeast of Brazil are commonly more shallow (50cm 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) with aluminum shells (for lightness). Surdos are worn from a waist belt or shoulder strap, oriented with the heads roughly horizontal. The bottom head is not played.

Rio-style Carnival samba[link]

A typical carnival samba bateria in Rio de Janeiro has three surdo parts distinguished by tunings (and, by extension, sizes of drum). Together these three parts create a distinctive pattern which propels and drives the samba.

The surdos on which the primeira ("first") or marcação ("marker") part is played are the largest and deepest-pitched drums in the bateria. They are normally between 22" and 26" in diameter. The primeira part provides the pulse or rhythmic reference for the entire bateria. It sounds the "2" of the basic "1, 2" rhythm of samba and may also sound pick-up notes to start the music.

The primeira is answered by a slightly smaller and higher-pitched surdo playing a part known as segunda ("second"), resposta ("response"), or respondor ("that which responds"). It is generally played on drums 20" or 22" in diameter. It sounds the "1" of the basic "1, 2" rhythm of samba.

The third surdo part, called terceira ("third") or cutador ("cutter" in English), is played on the smallest and highest-pitched surdos, generally between 14" and 18" in diameter. The terceira part consists of more complex patterns that provide fills and syncopations, producing an effect of "cutting" across the basic pulse created by other two surdo parts. Terceira patterns are important drivers of music's "swing" — the feel of the bateria. Terceira players are the only surdo players with room for limited improvisation.

Other Brazilian music[link]

Surdos are used by samba-reggae and axé music groups of northeastern Brazil. Samba-reggae usually has two (or even 3) surdo tunings, the lowest tuning playing the pulse on 1 and the higher tuning playing the 2 (The reverse of Rio-style Samba). Middle Surdos, (tuned either as the 2 or slightly higher), playing any number of counterpatterns. The middle surdos are played with two mallets in samba-reggae to allow for more complex rhythms.

Single surdos are also used extensively in smaller samba and pagode bands.

Other bass drums found elsewhere in Brazil include the zabumba and alfaia of the northeast.

Playing techniques[link]

For samba-enredo (Rio-style Carnival samba), surdos are played with one percussion mallet, damping the head with the other hand. In more intimate settings with smaller bands, a surdo player may make elaborate use of damped hits and the free hand. In samba-reggae it is common to play the surdo with two mallets.

External links[link]

• Surdo notated music
• How to build a Surdo
• A Word about Surdos
• Instructions on making your own surdo beaters / mallets