obligatory

Meaning of "obligatory" in music

In the context of music, the term "obligatory" refers to a musical line or instrumental part that is considered essential and indispensable in a performance. It is a term commonly used in Western classical music to describe a musical element that cannot be omitted without significantly altering the composition.

For example, in an aria from the 18th century with a trumpet obbligato, the trumpet part is considered obligatory. It is an essential part of the composition and cannot be omitted without fundamentally changing the piece.

The term "obligatory" in music emphasizes the importance and significance of a particular musical line or instrumental part, highlighting its essential role in the overall composition.

Sources: 'Obbligato - Wikipedia' 'Obbligato | Classical, Baroque & Chamber Music | Britannica'