A cappella

A cappella is a polyphonic type of music. The human voice is used as an instrument.The word literally means "church style" in Italian and was developed to distinguish the renaissance style and the baroque concerto. It is mostly heard in church choirs. In a cappella, the same type of music is performed without using any instruments.

In this study, different color and form options were preferred to reflect polyphonic music. The thin and deep vocal range of the human voice is associated with the curvilinear and flat forms of the forms.