Vocal quartet
A vocal quartet is four people from a musical quartet who sing together. This can be four men, four women, or any other combination. Regardless of gender, however, one usually divides into four different voices , which are adjusted to the height of the respective pitch range of the person concerned.
A vocal quartet, by a Instrumantalgruppe be accompanied, the performance is not accompanied particularly in onomatopoeic imitation of instruments " A cappella called".