Vocal music is any type of music in which singing is the focus of the piece. The vocal performance may be cantata, meaning it is accompanied by musical instrument, or may be performed a cappella, without instrumental accompaniment. A short piece of music in which words are incorporated is referred to with the general term song. The words of a song are called lyrics. There are also examples of songs without lyrics in which only sounds or syllables are produced.
Vocal music has been around for nearly as long as humans themselves have. It is the oldest type of music since it does not require anything but a human voice and it is present in every culture in the world in a different form. However, reliable sources of the origin of vocal music are extremely rare due to the fact that for centuries music was not recorded in any way but was simply transferred orally between generations, communities and nations.
Traces of ancient vocal acts still remain in tribal and folk songs and chants but their origin and meaning are sometimes impossible to define. There are a few verbal accounts and opinions on music acts and their effect in the works of the poet Homer, Plato and the Bible. Surprisingly, some of the music pieces, albeit thought of as primitive, are complex and require plenty of skill to be performed. One example is the wide range of drum rhythms present in African tribes.
Traditionally, most of the theory and terminology in music comes from Italy because it was the place where music started to be studied and explored during the Renaissance. Early composers introduced a great deal of terms at that time and the early stages of that period are generally considered the beginning of music science. That is why the voice type classification of music is also marked by Italian terms.
Defining the voice type is extremely important for singers and vocal pedagogues. The wrong training could cause damage to the vocal cords and shorten the singer's career. A person's voice requires extensive training in order to be fully developed. Since the "instrument" is within the performer, a vocal pedagogue cannot describe the act of singing. Instead, teaching somebody to sing relies on introducing concepts and providing the student with methods to free the apparatus from tension and to reveal the full range of the voice.
A classification of voice types for classical music, mostly opera, has been invented. A voice is classified according to vocal range, vocal weight, pitch, timbre and vocal transition points among others. Female voices are divided from highest to lowest in soprano, mezzo-soprano, contralto and alto. The lower ones, contralto and alto, are extremely rare. The male voices from highest to lowest are countertenor, tenor, baritone and bass. In non-classical music, this classification is only loosely applied mainly because the distinction is made with regard to classical music vocal training and techniques. In other words, even if a voice has the vocal range of a soprano, the sound would be different unless specifically trained in classical vocal techniques.
In the 20th century, vocal music developed in such a wide variety of styles, genres, interpretations and techniques that it is almost impossible to list them all. However, there are a few major trends worth mentioning. One of the most interesting and innovative techniques of the 20th century was the scat singing, improvisation of nonsense syllables, typical of jazz music. Louis Armstrong (1901-1971) was to first to experiment with it in the 1920s but the most prominent scat singer was Ella Fitzgerald (1917-1996). Scat singing influenced another type of improvisation known as beatboxing. Beatboxers produce drum beats and percussion, rhythms and musical sounds using their mouth, tongue, lips and voice. It appeared in the late 1980s as "mouth drumming" and was closely linked to hip-hop but became mainstream in the late 1990s and the beginning of the 21st century.
The advancement of modern technology has greatly influenced vocal music. Vocal performances are very often accompanied by computer generated effects to enforce the voice resonance and vary the voice range and pitch. According to music experts, this may be considered both an advantage and disadvantage as it may lead to lower quality performers who rely heavily on computer effects even in live performances.