Music can also be pat by describing a "process" which may create musical sounds; examples of Royalty Free Music this range from draft chimes, through digital programs which select sounds. Popular which contains elements selected by lucky is called Aleatoric music, and is associated with such composers as John Cage, Morton Feldman, and Witold Lutosławski.

What is important in understanding the composition of a piece is singling out its elements. An understanding of music's formal elements can be helpful in deciphering exactly how a piece is constructed. A universal element of classical is how ode occur in time, which is referred to as the rhythm of a piece of music.