What happens when a composer shortens musical idea by only using part of it?

Fragmentation is a compositional technique in which a musical idea is shortened by only using part of it. This can be done by taking a section of the idea and repeating it, or by taking only the beginning or end of the idea. Fragmentation can be used to create a sense of urgency or excitement, or to add variety to a piece of music.

One example of fragmentation is the use of a ostinato, which is a short, repeated musical phrase that is used as the basis for a larger piece of music. The ostinato can be used to provide a sense of continuity and structure to the music, or it can be used to create a sense of tension and suspense.

Another example of fragmentation is the use of sampling, which is the process of taking a short section of a piece of music and using it as the basis for a new piece of music. Sampling can be used to create new and interesting sounds, or it can be used to create homages to other pieces of music.

Fragmentation is a versatile compositional technique that can be used to create a wide variety of musical effects. It is a powerful tool that can be used to add interest, excitement, and variety to a piece of music.