The texture is often described in regard to the density, or thickness, and range, or width, between lowest and highest pitches, in relative terms as well as more specifically distinguished according to the number of voices, or parts, and the relationship between these voices (see Common types below).
The thickness also is changed by the amount and the richness of the instruments playing the piece.
Many classical pieces feature different kinds of texture within a short space of time.
The upper two parts are imitative, the lowest part consists of a repeated note (pedal point) and the remaining part weaves an independent melodic line: The final four bars revert to homophony, bringing the section to a close; A complete performance can be heard by following this link: Listen Although in music instruction certain styles or repertoires of music are often identified with one of these descriptions this is basically added music[clarification needed] (for example, Gregorian chant is described as monophonic, Bach Chorales are described as homophonic and fugues as polyphonic), many composers use more than one type of texture in the same piece of music.
A simultaneity is more than one complete musical texture occurring at the same time, rather than in succession.