Cuatro means four in Spanish; the instrument's 15th century predecessors were the Spanish vihuela and the Portuguese cavaquinho, the latter having four strings like the cuatro.
Modern cuatros come in a variety of sizes and shapes, and number of strings. Cuatros can either have single-strings, like a guitar, or double- or triple-coursed strings like a mandolin, and vary in size from a large mandolin or small guitar, to the size of a full-size guitar. Depending on their particular stringing, cuatros are part of the guitar or mandolin subfamilies of the lute family.
The Cuban cuatro (cuatro Cubano, or tres cuatro) is similar to a Cuban tres, but with 4 courses of doubled strings, instead of the usual 3 courses. It is usually tuned
See main article: Puerto Rican cuatro. The word cuatro was used to represent the number of strings that the instrument initially had, but a 10 stringed, 5 course cuatro was made in 1887, as shown in a photograph taken in 1916. By 1922, cuatro music was being played on Puerto Rican radio stations, like "Los Jíbaros de la Radio" (1932) and "Industrias Nativas" (1934). After many years of constant rise in popularity, the Puerto Rican government approved a law in 2002 declaring that every year on November 17, the Commonwealth would celebrate "El día del Cuatro y del Cuatrista Puertorriqueño"[2] (Day of the Cuatro and Puerto Rican Cuatro Player). Only a year later, the Puerto Rican cuatro was one of three instruments that were declared the National Instruments of the Commonwealth of Puerto Rico and important symbols of Puerto Rican culture.[3]
The Puerto Rican cuatro is shaped more like a viola than a guitar, and is the most familiar of the three instruments of the Puerto Rican orquesta jíbara (i.e., the cuatro, the tiple and the bordonua). The Puerto Rican cuatro has ten strings in five courses, tuned in fourths from low to high, with B and E in octaves and A, D, and G in unisons:
The cuatro is composed of several parts that work together to formulate the distinguishable sound of the instrument:
Several sizes of the instrument exist, including a cuatro soprano, cuatro alto, cuatro tradicional (the standard instrument, also called cuatro tenor), and cuatro bajo (bass): All have 10 strings and are tuned in fourths. There is also a cuatro lírico (lyrical cuatro), which is about the size of the tenor, but has a deep jellybean-shaped body; a cuatro sonero, which has 15 strings in 5 courses of 3 strings each; and a seis, which is a cuatro tradicional with an added two-string course (usually a lower course), giving it a total of 12 strings in 6 courses.[4]
The Puerto Rican Cuatro is played with a pick, and the cuatrista will strike downwards on the string with the pick in order to generate the sound that the person wants to produce. The most popular technique used to play the cuatro is called tremolo, which occurs when a cuatro player continually strikes the same chord multiple times to generate a sound for a longer period of time. The tremolo is used to play longer lasting notes, like whole notes, half notes, and tied eighth notes and sixteenth notes.
Musically, the Puerto Rican cuatro, although it is used throughout the year, it is mostly heard during Christmas time ("The short history of the cuatro"). The genres of music where the cuatro's presence is really known in Plena, the Trova, the Aguinaldo and the Seis that were created in Puerto Rico. Sometimes, it is integrated in salsa and other genres of music like the waltz. Some of the aguinaldos and seises created in Puerto Rico are:
See main article: Cuatro (Venezuela). The cuatro of Venezuela has four single nylon strings, tuned It is similar in shape and tuning to the ukulele, but their character and playing technique are different. It is tuned in a similar fashion to the ukulele's traditional D tuning, but the B is an octave lower. Consequently, the same fingering can be used to shape the chords, but it produces a different inversion of each chord. There are variations on this instrument, having 5 strings or 6 strings.
Other Venezuelan cuatro variants include:
| cinco cuatro | 5 strings in 4 courses |
| seis cinco | 6 strings in 5 courses |
| cinco y medio | 5 normal-length strings and an extra, 6th short string from the top of the body |
| cuatro y medio | 4 normal-length strings plus an extra, 5th short string |
| octavo | 8 strings in 4 double-string courses |
Certain variants are considered the national instrument of some countries (e.g., Venezuela). The cuatro is widely used in ensembles in Jamaica, Mexico, and Suriname to accompany singing and dancing. In Trinidad and Tobago it accompanies Parang singers. In Saint Lucia the cuatro is used as an accompanying instrument in traditional Sewenal music at Christmas time.