In music, an “ornament” is a decoration for a melody, bass line or other musical part. The detail explicitly included in musical notation varies between genres and historical periods. In general, the musical notation of the art of the seventh-twentieth requires artists to have a great knowledge of the context on the styles of performance. For example, in the seventeenth and eighteenth centuries, music for solo artists generally indicated a simple, unadorned melody. However, it was expected that artists would know how to add stylistically appropriate ornaments to add interest to music, such as trills and turns.
In the nineteenth century, art music for solo artists can give a general instruction, and play expressive music, without describing in detail how the artist should do. It was expected that the performer would know how to use tempo changes, emphasis and pauses (among other features) to achieve this “expressive” performance style. In the 20th century, musical notation of art often became more explicit and used a range of marks and annotations to tell performers how to play or sing the piece.
In popular music and jazz, musical notation almost always indicates that the basic framework of melody, harmony, or approach to performance; Musicians and singers are expected to know the performance conventions and styles associated with specific genres and pieces. For example, the “lead sheet” for a jazz air can only indicate melody and chord changes.It is expected that the jazz ensemble performers will know how to “translate” this basic structure by adding ornaments, music Improvised and accompanying agreements.